The Ionising Radiations Regulations 2017

• (b) in respect of an investigation made pursuant to paragraph (1)(c), keep that report or a copy of the report until the person to whom the record relates has or would have attained the age of 75 years but in any event for at least 30 years from the date on which it was made.

• (3) Where the person who received the overexposure is an employee who has a dose record, the employee's employer must arrange for the assessment of the dose received to be entered into that dose record.

• (4) In this regulation “appropriate authority” means—

• (a) in relation to overexposure as a result of work carried out on nuclear premises, the ONR;

• (b) otherwise, the Executive.

Dose limitation for overexposed employees

27

• (1) Without prejudice to other requirements of these Regulations and in particular regulation 25(5), where an employee has been subjected to an overexposure paragraph (2) applies in relation to the employment of that employee on work with ionising radiation during the remainder of the dose limitation period, where that remaining period commences at the end of the personal dose assessment period in which that employee was subjected to the overexposure.

• (2) The employer must ensure that an employee to whom this regulation relates does not, during the remainder of the dose limitation period, receive a dose of ionising radiation greater than that proportion of any dose limit which is equal to the proportion that the remaining part of the dose limitation period bears to the whole of that period.

• (3) The employer must inform an employee who has been subjected to an overexposure of the dose limit which is applicable to that employee for the remainder of the relevant dose limitation period.

• (4) In this regulation, “dose limitation period” means, as appropriate, a calendar year or the period of five consecutive calendar years.

PART 6 — ARRANGEMENTS FOR THE CONTROL OF RADIOACTIVE SUBSTANCES, ARTICLES AND EQUIPMENT

Sealed sources and articles containing or embodying radioactive substances

28

• (1) Where a radioactive substance is used as a source of ionising radiation in work with ionising radiation, the employer must ensure that, whenever reasonably practicable, the substance is in the form of a sealed source.

• (2) The employer must ensure that the design, construction and maintenance of any article containing or embodying a radioactive substance, including its bonding, immediate container or other mechanical protection, is such as to prevent the leakage of any radioactive substance—

• (a) in the case of a sealed source, so far as is practicable; or

• (b) in the case of any other article, so far as is reasonably practicable.

• (3) The employer must—

• (a) ensure that, where appropriate, suitable tests are carried out at suitable intervals to detect leakage of radioactive substances from any article to which paragraph (2) applies; and

• (b) make a suitable record of each such test and retain that record for at least 2 years after the article is disposed of or until a further record is made following a subsequent test to that article.

Accounting for radioactive substances

29

Every employer, for the purpose of controlling radioactive substances which are involved in work with ionising radiation undertaken by that employer, must—

• (a) take such steps as are appropriate to account for and keep records of the quantity and location of those substances; and

• (b) keep those records or a copy of the records for at least 2 years from the date on which they were made and, in addition, for at least 2 years from the date of disposal of that radioactive substance.

Keeping and moving of radioactive substances

30

• (1) An employer must ensure, so far as is reasonably practicable, that any radioactive substance under its control which is not for the time being in use or being moved, transported or disposed of—

• (a) is kept in a suitable receptacle; and

• (b) is kept in a suitable store.

• (2) An employer who causes or permits a radioactive substance to be moved (otherwise than by transporting it) must ensure that, so far as is reasonably practicable, the substance is kept in a suitable receptacle, suitably labelled, while it is being moved.

• (3) Nothing in paragraphs (1) or (2) applies in relation to a radioactive substance while it is in or on the live body or corpse of a human being.

Notification of certain occurrences

31

• (1) An employer must immediately notify the appropriate authority in any case where a quantity of a radioactive substance which was under its control and which exceeds the quantity specified for that substance in column 5 of Part 1 of Schedule 7—

• (a) has been released or is likely to have been released into the atmosphere as a gas, aerosol or dust; or

• (b) has been spilled or otherwise released in such a manner as to give rise to significant contamination.

• (2) Paragraph (1) does not apply where such release—

• (a) in relation to England and Wales—

• (i) was in accordance with an environmental permit under the Environmental Permitting (England and Wales) Regulations 2016 in respect of mobile radioactive apparatus within the meaning of those regulations;

• (ii) was in a manner specified in such an environmental permit in respect of radioactive waste within the meaning of those regulations; or

• (iii) did not, under regulation 12 of those regulations, require an environmental permit;

• (b) in relation to Scotland was in accordance with an authorisation for a radioactive substances activity within the meaning given in regulation 4 of the Environmental Authorisations (Scotland) Regulations 2018.

• (3) Where an employer has reasonable cause to believe that a quantity of a radioactive substance which exceeds the quantity for that substance specified in column 6 of Part 1 of Schedule 7 and which was under its control is lost or has been stolen, the employer must immediately notify the appropriate authority of that loss or theft, as the case may be.

• (4) Where an employer suspects or has been informed that an occurrence notifiable under this regulation may have occurred, it must make an immediate investigation and, unless that investigation shows that no such occurrence has occurred, it must immediately make a notification under the relevant paragraph of this regulation.

• (5) An employer who makes any investigation in accordance with paragraph (4) must make a report of that investigation and must, unless the investigation showed that no such occurrence occurred, keep that report or a copy of the report for at least 30 years from the date on which it was made or, in any other case, for at least 2 years from the date on which it was made.

• (6) In this regulation “appropriate authority” means—

• (a) in relation to an occurrence notifiable under this regulation as a result of work carried out on nuclear premises, the ONR;

• (b) otherwise, the Executive.

Duties of manufacturers etc of articles for use in work with ionising radiation

32

• (1) In the case of articles for use at work, where that work is work with ionising radiation, section 6(1) of the 1974 Act (which imposes general duties on manufacturers etc. as regards articles and substances for use at work) is modified so that any duty imposed on any person by that subsection includes a duty to ensure that any such article is so designed and constructed as to restrict so far as is reasonably practicable the extent to which employees and other persons are or are likely to be exposed to ionising radiation.

• (2) Where a person erects or installs an article for use at work, being work with ionising radiation, that person must—

• (a) undertake a critical examination of the way in which the article was erected or installed for the purpose of ensuring, in particular, that—

• (i) any safety features and warning devices operate correctly; and

• (ii) there is sufficient protection for persons from exposure to ionising radiation;

• (b) consult with the radiation protection adviser that they appointed, or that the employer engaged in work with ionising radiation appointed, with regard to the nature and extent of any critical examination and the results of that examination; and

• (c) provide the employer engaged in work with ionising radiation with adequate information about proper use, testing and maintenance of the article.

Equipment used for medical exposure

33

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Misuse of or interference with sources of ionising radiation

34

No person may intentionally or recklessly misuse or without reasonable excuse interfere with any radioactive substance or any electrical equipment in respect of which these Regulations apply.

PART 7 — DUTIES OF EMPLOYEES AND MISCELLANEOUS

Duties of employees

35

• (1) An employee who is engaged in work with ionising radiation must not knowingly expose themselves or any other person to ionising radiation to an extent greater than is reasonably necessary for the purposes of their work, and must exercise reasonable care while carrying out such work.

• (2) Every employee or outside worker for whom personal protective equipment is provided pursuant to regulation 9(2)(c) must—

• (a) make full and proper use of any such personal protective equipment;

• (b) immediately report to the employer who provided any such personal protective equipment any defect they discover in that equipment; and

• (c) take all reasonable steps to ensure that any such personal protective equipment is returned after use to the accommodation provided for it.

• (3) It is the duty of every classified outside worker not to misuse the radiation passbook issued to that worker or falsify or attempt to falsify any of the information contained in it.

• (4) Any employee to whom regulation 22(1) or regulation 13(2)(b) relates must comply with any reasonable requirement imposed on that person by that person's employer for the purposes of making the measurements and assessments required under regulation 22(1) and regulation 24(1).

• (5) An employee who is subject to medical surveillance under regulation 25 must, when required by their employer and at the cost of the employer, present themselves during their working hours for such medical examination and tests as may be required for the purposes of regulation 25(2) and must provide the relevant doctor with such information concerning their health as the relevant doctor may reasonably require.

• (6) Where an employee has reasonable cause to believe that—

• (a) they or some other person has received an overexposure; or

• (b) an occurrence mentioned in paragraph (1) or (3) of regulation 31 has occurred; ...

• (c) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

they must immediately notify their employer of that belief.

Approval of dosimetry services

36

• (1) The Executive (or such other person as may from time to time be specified in writing by the Executive) may, by a certificate in writing, approve (in accordance with such criteria as may from time to time be specified by the Executive) a suitable dosimetry service for such of the purposes of these Regulations or of the Radiation (Emergency Preparedness and Public Information) Regulations 2019 as are specified in the certificate.

• (2) A certificate made pursuant to paragraph (1) may be made subject to conditions and may be revoked in writing at any time.

• (3) The Executive (or such other person as may from time to time be specified in writing by the Executive) may at such periods as it considers appropriate carry out a re-assessment of any approval granted pursuant to paragraph (1).

Defence on contravention

37

• (1) In any proceedings against an employer for an offence under regulation 5(2) (notification), 6(3) (registration) or 7(2) (consent), it is a defence for that employer to prove that—

• (a) it neither knew nor had reasonable cause to believe that it had carried out or might be required to carry out work that required notification under regulation 5(2), registration under regulation 6(3) or consent under regulation 7(2) (as the case may be); and

• (b) in a case where it discovered that it had carried out or was carrying out such work, it had immediately notified, registered or applied for consent for such work (as the case may be) in accordance with those regulations.

• (2) The defence in paragraph (1)—

• (a) in connection with an offence under regulation 6(3), does not apply in relation to the operation of a radiation generator; and

• (b) in connection with an offence under regulation 7(2), only applies in relation to a practice referred to in regulation 7(1)(g).

• (3) In any proceedings against an employer for an offence under regulation 8, it is a defence for that employer to prove that—

• (a) it neither knew nor had reasonable cause to believe that it had commenced a new activity involving work with ionising radiation; and

• (b) in a case where it had discovered that it had commenced a new activity involving work with ionising radiation, it had as soon as practicable made an assessment as required by regulation 8.

• (4) In any proceedings against an employer for an offence under regulation 28(2) it is a defence for that employer to prove that—

• (a) it had received and reasonably relied on a written undertaking from the supplier of the article concerned that the article complied with the requirements of that paragraph; and

• (b) it had complied with the requirements of paragraph (3) of that regulation.

• (5) In any proceedings against an employer of an outside worker for a breach of a duty under these Regulations it is a defence for that employer to show that—

• (a) it had entered into a contract in writing with the employer who had designated an area as a controlled or supervised area and in which the outside worker was working or was to work for that employer to perform that duty on its behalf; and

• (b) the breach of duty was a result of the failure of the employer referred to in sub-paragraph (a) to fulfil that contract.

• (6) In any proceedings against any employer who has designated a controlled or supervised area in which any outside worker is working or is to work for a breach of a duty under these Regulations it is a defence for that employer to show that—

• (a) it had entered into a contract in writing with the employer of an outside worker for that employer to perform that duty on its behalf; and

• (b) the breach of duty was a result of the failure of the employer referred to in sub-paragraph (a) to fulfil that contract.

• (7) A person charged is not, without the permission of the court, entitled to rely on the defence referred to in paragraph (5) or (6) unless, within a period ending 7 clear days before the hearing, that person has served on the prosecutor a notice in writing of that person's intention to rely on the defence and the notice must be accompanied by a copy of the contract on which that person intends to rely and, if that contract is not in English, an accurate translation of that contract into English.

• (8) Where a contravention of these Regulations by any person is due to the act or default of some other person, that other person will be guilty of the offence which would, but for any defence under this regulation available to the first-mentioned person, be constituted by the act or default.

• (9) In this regulation, “appropriate authority” means—

• (a) in connection with the application of this regulation in relation to, or in relation to any activity carried out on, any nuclear premises, the ONR;

• (b) otherwise, the Executive.

Exemption certificates

38

• (1) Subject to paragraph (2), the appropriate authority may, by a certificate in writing, exempt—

• (a) any person or class of persons;

• (b) any premises or class of premises; or

• (c) any equipment, apparatus or substance or class of equipment, apparatus or substance,

from any requirement or prohibition imposed by these Regulations and any such exemption may be granted subject to conditions and to a limit of time and may be revoked by a certificate in writing at any time.

• (2) The appropriate authority must not grant an exemption unless, having regard to the circumstances of the case and in particular to—

• (a) the conditions, if any, which it proposes to attach to the exemption; and

• (b) any other requirements imposed by or under any enactments which apply to the case,

it is satisfied that—

• (c) the health and safety of persons who are likely to be affected by the exemption will not be prejudiced in consequence of it; and

• (d) compliance with the fundamental radiation protection provisions underlying regulations 9(1) and (2)(a), 12, 13(1), 17(1) and (3), 20(1), 21(1), 22(1), and 25(2)... will be achieved.

• (3) In this regulation, “appropriate authority” means—

• (a) in connection with the application of this regulation in relation to, or in relation to any activity carried out on, any nuclear premises, the ONR;

• (b) otherwise, the Executive.

Extension outside Great Britain

39

• (1) Subject to paragraph (2), these Regulations apply to any work outside Great Britain to which sections 1 to 59 and 80 to 82 of the 1974 Act apply by virtue of the Health and Safety at Work etc. Act 1974 (Application outside Great Britain) Order 2013 as they apply to work within Great Britain.

• (2) For the purposes of paragraph (1), in any case where it is not reasonably practicable for an employer to comply with the requirements of these Regulations in so far as they relate to functions being performed by a relevant doctor or by an approved dosimetry service, it is sufficient compliance with any such requirements if the employer makes arrangements affording an equivalent standard of protection for its employees and those arrangements are set out in local rules.

Modifications relating to the Ministry of Defence etc

40

• (1) In this regulation, any reference to—

• (a) “visiting forces” is a reference to visiting forces within the meaning of any provision of Part 1 of the Visiting Forces Act 1952 ; and

• (b) “headquarters or organisation” is a reference to a headquarters or organisation designated for the purposes of the International Headquarters and Defence Organisations Act 1964 .

• (2) The Secretary of State for Defence may, in the interests of national security, by a certificate in writing exempt—

• (a) Her Majesty's Forces;

• (b) visiting forces;

• (c) any member of a visiting force working in or attached to any headquarters or organisation; or

• (d) any person engaged in work with ionising radiation for, or on behalf of, the Secretary of State for Defence,

from all or any of the requirements or prohibitions imposed by these Regulations and any such exemption may be granted subject to conditions and to a limit of time and may be revoked at any time by a certificate in writing, except that, where any such exemption is granted, suitable arrangements must be made for the assessment and recording of doses of ionising radiation received by persons to whom the exemption relates.

• (3) Regulations 5, 6 and 7 do not apply in relation to work carried out by visiting forces or any headquarters or organisation on premises under the control of such visiting force, headquarters or organisation, as the case may be, or on premises under the control of the Secretary of State for Defence.

• (4) With respect to any work with ionising radiation undertaken for, or on behalf of, the Secretary of State for Defence—

• (a) the requirements of regulations 5(2) and (3), 6(4)(a) and (b), and 7(3)(a) and (b) to notify particulars specified by the appropriate authority (as defined for the purposes of those regulations) only apply in relation to the particulars that may be so specified from the list set out in paragraph (9); and

• (b) any requirement to provide any of the particulars described in paragraphs (9)(d), (e), (f), (g), (h) (i) and (k) does not apply where—

• (i) the Secretary of State for Defence decides that the provision of such particulars will be contrary to the interests of national security; or

• (ii) suitable alternative arrangements have been agreed with the appropriate authority (as defined in paragraph (10)).

• (5) Regulation 5(4) does not apply to an employer in relation to work with ionising radiation undertaken for or on behalf of the Secretary of State for Defence, visiting forces or any headquarters or organisation.

• (6) Sub-paragraph (i) of regulation 22(3) does not apply in relation to a practice carried out—

• (a) by or on behalf of the Secretary of State for Defence;

• (b) by a visiting force; or

• (c) by any member of a visiting force in or attached to any headquarters or organisation.

• (7) Regulations 23(6), (7) and (8) and regulation 25(8) do not apply in relation to visiting forces or any member of a visiting force working in or attached to any headquarters or organisation.

• (8) In regulation 26(1) the requirement to notify the appropriate authority (as defined for the purposes of that regulation) of a suspected overexposure and the results of the consequent investigation and assessment does not apply in relation to the exposure of—

• (a) a member of a visiting force; or

• (b) a member of a visiting force working in or attached to a headquarters or organisation.

• (9) The particulars referred to in paragraph (4) are—

• (a) the name, address, telephone number and email address of the employer;

• (b) the address of the premises where or from where the work activity is to be carried out and a telephone number or email address for such premises;

• (c) the nature of the business of the employer;

• (d) a description of the work with ionising radiation;

• (e) particulars of the source or sources of ionising radiation including the type of electrical equipment used or operated and the nature of any radioactive substance;

• (f) the quantities of any radioactive substance used in the work;

• (g) the identity of any person engaged in the work;

• (h) whether or not any source is to be used at premises other than the address given in sub-paragraph (b);

• (i) the location and description of any premises at which the work is carried out on each occasion that it is so carried out;

• (j) the date of notification, registration or application for consent to carry out the work activity and the date of commencement of the work activity;

• (k) the duration of any period over which the work is carried out and the date of termination of the work activity.

• (10) In paragraph (4)(b)(ii), “appropriate authority” means—

• (a) in connection with the application of this regulation in relation to, or in relation to any activity carried out on, any nuclear premises, the ONR;

• (b) otherwise, the Executive.

Transitional provisions and savings

41

Schedule 8, which makes transitional provisions and savings, has effect.

Modifications and revocation

42

• (1) Schedule 9, which contains modifications to primary legislation and instruments, has effect.

• (2) The Ionising Radiations Regulations 1999 are revoked.

Review

43

• (1) The Secretary of State must from time to time—

• (a) carry out a review of the regulatory provision contained in these Regulations; and

• (b) publish a report setting out the conclusions of the review.

• (2) The first report must be published before 1st January 2023.

• (3) Subsequent reports must be published at intervals not exceeding 5 years.

• (4) Section 30(3) of the Small Business, Enterprise and Employment Act 2015 requires that a review carried out under this regulation must, so far as is reasonable, have regard to how the Directive is implemented in other member States.

• (5) Section 30(4) of the Small Business, Enterprise and Employment Act 2015 requires that a report published under this regulation must, in particular—

• (a) set out the objectives intended to be achieved by the regulatory provision referred to in paragraph (1)(a);

• (b) assess the extent to which those objectives are achieved;

• (c) assess whether those objectives remain appropriate; and

• (d) if those objectives remain appropriate, assess the extent to which they could be achieved in another way which involves less onerous regulatory provision.

• (6) In this regulation, “regulatory provision” has the same meaning as in sections 28 to 32 of the Small Business, Enterprise and Employment Act 2015 (see section 32 of that Act).

SCHEDULE 1 — Work not required to be notified under regulation 5

1

Work with ionising radiation is not required to be notified in accordance with regulation 5 when the only such work being carried out is in one or more of the following categories—

• (a) where the concentration of activity per unit mass of a radioactive substance does not exceed the concentration specified in column 2 of Part 1 of Schedule 7 (for artificial radionuclides and naturally occurring radionuclides which are processed for their radioactive, fissile or fertile properties) or column 2 of Part 2 of Schedule 7 (for naturally occurring radionuclides which are not processed for their radioactive, fissile or fertile properties);

• (b) where the quantity of radioactive substance involved does not exceed the quantity specified in column 3 of Part 1 of Schedule 7 (for artificial radionuclides and naturally occurring radionuclides which are processed for their radioactive, fissile or fertile properties) or column 3 of Part 2 of Schedule 7 (for naturally occurring radionuclides which are not processed for their radioactive, fissile or fertile properties);

• (c) where the concentration of activity per unit mass or quantity of a radioactive substance does not exceed values which may be approved by the appropriate authority for specific types of work and where such work satisfies the exemption criteria set out in paragraphs 2 and 3 below;

• (d) where apparatus contains radioactive substances in a quantity exceeding the values specified in sub-paragraphs (a) and (b) provided that—

• (i) the apparatus is of a type approved by the Executive;

• (ii) the apparatus is constructed in the form of a sealed source;

• (iii) the apparatus does not under normal operating conditions cause a dose rate of more than 1 µSvh⁻¹ at a distance of 0.1 m from any accessible surface; and

• (iv) conditions for the disposal of the apparatus have been specified by the relevant environmental body;

• (e) the operation of any electrical apparatus to which these Regulations apply other than apparatus referred to in sub-paragraph (f) provided that—

• (i) the apparatus is of a type approved by the Executive; and

• (ii) the apparatus does not under normal operating conditions cause a dose rate of more than 1 µSvh⁻¹ at a distance of 0.1 m from any accessible surface;

• (f) the operation of—

• (i) any cathode ray tube intended for the display of visual images; or

• (ii) any other electrical apparatus operating at a potential difference not exceeding 30kV,

provided that the operation of the tube or apparatus does not under normal operating conditions cause a dose rate of more than 1 µSvh⁻¹ at a distance of 0.1 m from any accessible surface; or

• (g) where the work involves contaminated material resulting from authorised releases which the relevant environmental body has declared not to be subject to further control.

2

The criteria for the exemption from notification of work with ionising radiation are as follows:

• (a) the radiological risks to individuals caused by such work are sufficiently low as to be of no regulatory concern;

• (b) work of such type has been found to be justified; and

• (c) such work is inherently safe.

3

Work with ionising radiation only meets the requirements of paragraph 2(a) if—

• (a) in relation to an employee, the effective dose caused by such work does not exceed 1 mSv in a calendar year; and

• (b) in relation to any other person, the following requirements are met in all circumstances where it is reasonably practicable to do so—

• (i) the effective dose caused by such work from radionuclides which are not naturally occurring radionuclides does not exceed 10 µSv in a calendar year; and

• (ii) the effective dose caused by such work from naturally occurring radionuclides does not exceed 1 mSv in a calendar year.

4

In paragraph 2(b), “found to be justified” has the meaning given by regulation 4(4) of the Justification of Practices Involving Ionising Radiation Regulations 2004 .

5

In this Schedule—

• “appropriate authority” means—in relation to any activity carried out exclusively or primarily on premises which are or are on–an authorised defence site;a new nuclear build site;a nuclear warship site,the ONR;otherwise, the Executive;

• “relevant environmental body”—in relation to England, means the Environment Agency;in relation to Wales, means the Natural Resources Body for Wales;in relation to Scotland, means the Scottish Environment Protection Agency.

SCHEDULE 2 — Consent to carry out a practice: indicative list of information

1

Responsibilities and organisational arrangements for protection and safety.

2

Staff competences, including information and training.

3

Design features of the facility and of radiation sources.

4

Anticipated occupational and public exposures in normal operation.

5

Safety assessment of the activities and the facility in order to—

• (a) identify ways in which potential exposures or accidental and unintended medical exposures could occur;

• (b) estimate, to the extent practicable, the probabilities and magnitude of potential exposures;

• (c) assess the quality and extent of protection and safety provisions, including engineering features, as well as administrative procedures;

• (d) define the operational limits and conditions of operation.

6

Emergency procedures.

7

Maintenance, testing, inspection and servicing so as to ensure that the radiation source and the facility continue to meet the design requirements, operational limits and conditions of operation throughout their lifetime.

8

Management of radioactive waste and arrangements for the disposal of such waste, in accordance with applicable regulatory requirements.

9

Management of disused sources.

10

Quality assurance.

SCHEDULE 3 — Dose limits

PART 1 — Classes of persons to whom dose limits apply

Employees and trainees of 18 years of age or above

1

For the purposes of regulation 12(1), the limit on effective dose for any employee or trainee, being of 18 years of age or above, is 20 mSv in any calendar year.

2

Without prejudice to paragraph 1—

• (a) the limit on equivalent dose for the lens of the eye is—

• (i) 20 mSv in a calendar year; or

• (ii) in accordance with conditions approved by the Executive from time to time, 100 mSv in any period of five consecutive calendar years subject to a maximum equivalent dose of 50 mSv in any single calendar year;

• (b) the limit on equivalent dose for the skin is 500 mSv in a calendar year as applied to the dose averaged over any area of 1 cm² regardless of the area exposed;

• (c) the limit on equivalent dose for the extremities is 500 mSv in a calendar year.

Trainees aged under 18 years

3

For the purposes of regulation 12(1), the limit on effective dose for any trainee under 18 years of age is 6 mSv in any calendar year.

4

Without prejudice to paragraph 3—

• (a) the limit on equivalent dose for the lens of the eye is 15 mSv in a calendar year;

• (b) the limit on equivalent dose for the skin is 150 mSv in a calendar year as applied to the dose averaged over any area of 1 cm² regardless of the area exposed;

• (c) the limit on equivalent dose for the extremities is 150 mSv in a calendar year.

Other persons

5

Subject to paragraph 6, for the purposes of regulation 12(1) the limit on effective dose for any person other than an employee or trainee referred to in paragraph 1 or 3, including any person below the age of 16, is 1 mSv in any calendar year.

6

Paragraph 5 does not apply in relation to any person (not being a carer and comforter) who may be exposed to ionising radiation resulting from the medical exposure of another and in such a case the limit on effective dose for any such person is 5 mSv in any period of 5 consecutive calendar years.

7

Without prejudice to paragraphs 5 and 6—

• (a) the limit on equivalent dose for the lens of the eye is 15 mSv in any calendar year;

• (b) the limit on equivalent dose for the skin is 50 mSv in any calendar year averaged over any 1 cm² area regardless of the area exposed;

• (c) the limit on equivalent dose for the extremities is 50 mSv in a calendar year.

PART 2

8

For the purposes of regulation 12(2), the limit on effective dose for employees or trainees of 18 years or above is 100 mSv in any period of five consecutive calendar years subject to a maximum effective dose of 50 mSv in any single calendar year.

9

Without prejudice to paragraph 8—

• (a) the limit on equivalent dose for the lens of the eye is—

• (i) 20 mSv in a calendar year; or

• (ii) in accordance with conditions approved by the Executive from time to time, 100 mSv in any period of five consecutive calendar years subject to a maximum equivalent dose of 50 mSv in any single calendar year;

• (b) the limit on equivalent dose for the skin is 500 mSv in a calendar year as applied to the dose averaged over any area of 1 cm² regardless of the area exposed;

• (c) the limit on equivalent dose for the extremities is 500 mSv in a calendar year.

10

The employer must ensure that any employee in respect of whom regulation 12(2) applies is not exposed to ionising radiation to an extent that any dose limit specified in paragraphs 8 or 9 is exceeded.

11

An employer must not put into effect a system of dose limitation pursuant to regulation 12(2) unless—

• (a) the radiation protection adviser and any employees who are affected have been consulted;

• (b) any employees affected and the approved dosimetry service have been informed in writing of the decision and of the reasons for that decision; and

• (c) notice has been given to the appropriate authority at least 28 days (or such shorter period as the appropriate authority may allow) before the decision is put into effect giving the reasons for the decision.

12

Where there is reasonable cause to believe that any employee has been exposed to an effective dose greater than 20 mSv in any calendar year, the employer must, as soon as is practicable—

• (a) undertake an investigation into the circumstances of the exposure for the purpose of determining whether the dose limit referred to in paragraph 8 is likely to be complied with; and

• (b) notify the appropriate authority of that suspected exposure.

13

An employer must review the decision to put into effect a system of dose limitation pursuant to regulation 12(2) at appropriate intervals and in any event not less than once every five years.

14

Where as a result of a review undertaken pursuant to paragraph 13 an employer proposes to revert to a system of annual dose limitation pursuant to regulation 12(1), the provisions of paragraph 11 apply as if the reference in that paragraph to regulation 12(2) was a reference to regulation 12(1).

15

Where an employer puts into effect a system of dose limitation in pursuance of regulation 12(2), the employer must record the reasons for that decision and must ensure that the record is preserved until any person subject to the system of dose limitation under regulation 12(2) has or would have attained the age of 75 years but in any event for at least 30 years from the making of the record.

16

In any case where—

• (a) the dose limits specified in paragraph 8 are being applied by an employer in respect of an employee; and

• (b) the appropriate authority is not satisfied that it is impracticable for that employee to be subject to the dose limit specified in paragraph 1 of Part 1 of this Schedule,

the appropriate authority may require the employer to apply the dose limit specified in paragraph 1 of Part 1 with effect from such time as the appropriate authority may consider appropriate having regard to the interests of the employee concerned.

17

In any case where, as a result of a review undertaken pursuant to paragraph 13, an employer proposes to revert to an annual dose limitation in accordance with regulation 12(1), the appropriate authority may require the employer to defer the implementation of that decision to such time as the appropriate authority may consider appropriate having regard to the interests of the employee concerned.

18

Any person who is aggrieved by the decision of the appropriate authority taken pursuant to paragraphs 16 or 17 may appeal to the Secretary of State.

19

Sub-sections (2) to (6) of section 44 of the 1974 Act apply for the purposes of paragraph 18 as they apply to an appeal under section 44(1) of that Act.

20

The Health and Safety Licensing Appeals (Hearings Procedure) Rules 1974 , as respects England and Wales, and the Health and Safety Licensing Appeals (Hearings Procedure) (Scotland) Rules 1974 , as respects Scotland, apply to an appeal under paragraph 18 as they apply to an appeal under section 44(1) of the 1974 Act, but with the modification that references to a licensing authority are to be read as references to the appropriate authority.

21

In this Part, “appropriate authority” means—

• (a) in connection with the application of this Part in relation to, or in relation to any activity carried out on, any nuclear premises, the ONR;

• (b) otherwise, the Executive.

SCHEDULE 4 — Matters in respect of which a radiation protection adviser must be consulted

1

The implementation of requirements as to controlled and supervised areas.

2

The prior examination of plans for installations and the acceptance into service of new or modified sources of ionising radiation in relation to any engineering controls, design features, safety features and warning devices provided to restrict exposure to ionising radiation.

3

The regular calibration of equipment provided for monitoring levels of ionising radiation and the regular checking that such equipment is serviceable and correctly used.

4

The periodic examination and testing of engineering controls, design features, safety features and warning devices and regular checking of systems of work provided to restrict exposure to ionising radiation.

SCHEDULE 5 — Particulars to be entered in the radiation passbook

1

Individual serial number of the passbook.

2

A statement that the passbook has been approved by the Executive for the purpose of these Regulations.

3

Date of issue of the passbook by the approved dosimetry service.

4

The name, telephone number and mark of endorsement of the issuing approved dosimetry service.

5

The name, address, telephone number and e-mail address of the employer.

6

Full name (surname, forenames), date of birth, gender and national insurance number of the classified outside worker to whom the passbook has been issued.

7

Date of the last medical review of the classified outside worker and the relevant classification in the health record maintained under regulation 25 as fit, fit subject to conditions (which must be specified) or unfit.

8

The relevant dose limits applicable to the classified outside worker to whom the passbook has been issued.

9

The cumulative dose assessment in mSv for the year to date for the classified outside worker, external (whole body, organ or tissue) and/or internal as appropriate and the date of the end of the last assessment period.

10

In respect of services performed by the classified outside worker—

• (a) the name and address of the employer responsible for the controlled area;

• (b) the period covered by the performance of the services;

• (c) the following estimated dose information, as appropriate—

• (i) an estimate of any whole body effective dose in mSv received by the classified outside worker;

• (ii) in the event of non-uniform exposure, an estimate of the equivalent dose in mSv to organs and tissues as appropriate; and

• (iii) in the event of internal contamination, an estimate of the activity taken in or the committed dose.

SCHEDULE 6 — Particulars to be contained in a health record

The following particulars must be contained in a health record made for the purposes of regulation 25(2)(b)—

• (a) the employee’s—

• (i) full name;

• (ii) sex;

• (iii) date of birth;

• (iv) permanent address; and

• (v) National Insurance number;

• (b) the date of the employee’s commencement as a classified person in present employment;

• (c) the nature of the employee’s employment;

• (d) the date and type of the last medical examination or health review carried out in respect of the employee;

• (e) a statement by the relevant doctor made as a result of the last medical examination or health review carried out in respect of the employee classifying the employee as fit, fit subject to conditions (which should be specified) or unfit;

• (f) in relation to each medical examination and health review, the name and signature of the relevant doctor;

• (g) the name and address of the approved dosimetry service with whom arrangements have been made for maintaining the dose record in accordance with regulation 22.

SCHEDULE 7 — Quantities and concentrations of radionuclides

PART 1 — Table of artificial radionuclides and naturally occurring radionuclides (which are processed for their radioactive, fissile or fertile properties)

1	2	3	4	5	6
Radionuclide name, symbol, isotope	Concentration for: Notification (any amount of radioactive material); Registration (amounts of radioactive material that exceed 1,000kg)	Quantity for Notification	Concentration for Registration (amounts of radioactive material that do not exceed 1,000kg)	Quantity for notification of occurrences	Quantity for notification of occurrences
	Regulation 5(1) and Schedule 1, paragraph 1(a);regulation 6(2)(f)	Regulation 5(1) and Schedule 1, paragraph 1(b)	Regulation 6(2)(e)	Regulation 31(1)	Regulation 31(3)
	(Bq/g)	(Bq)	(Bq/g)	(Bq)	(Bq)
(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.
Hydrogen	Hydrogen	Hydrogen	Hydrogen	Hydrogen	Hydrogen
H-3 (tritiated compounds)	10²	10⁹	10⁶	10¹²	10¹⁰
Beryllium	Beryllium	Beryllium	Beryllium	Beryllium	Beryllium
Be-7	10	10⁷	10³	10¹²	10⁸
Carbon	Carbon	Carbon	Carbon	Carbon	Carbon
C-11	0.01	10⁶	10	10¹³	10⁷
C-11 (monoxide)	0.01	10⁹	10	10¹²	10¹⁰
C-11 (dioxide)	0.01	10⁹	10	10¹²	10¹⁰
C-14	1	10⁷	10⁴	10¹¹	10⁸
Oxygen	Oxygen	Oxygen	Oxygen	Oxygen	Oxygen
O-15	0.01	10⁹	10²	10¹⁰
Fluorine	Fluorine	Fluorine	Fluorine	Fluorine	Fluorine
F-18	10	10⁶	10	10¹³	10⁷
Sodium	Sodium	Sodium	Sodium	Sodium	Sodium
Na-22	0.1	10⁶	10	10¹⁰	10⁷
Na-24	0.1	10⁵	10	10¹¹	10⁶
Silicon	Silicon	Silicon	Silicon	Silicon	Silicon
Si-31	10³	10⁶	10³	10¹³	10⁷
Phosphorus	Phosphorus	Phosphorus	Phosphorus	Phosphorus	Phosphorus
P-32	10³	10⁵	10³	10¹⁰	10⁶
P-33	10³	10⁸	10⁵	10¹¹	10⁹
Sulphur	Sulphur	Sulphur	Sulphur	Sulphur	Sulphur
S-35	10²	10⁸	10⁵	10¹¹	10⁹
Chlorine	Chlorine	Chlorine	Chlorine	Chlorine	Chlorine
Cl-36	1	10⁶	10⁴	10¹⁰	10⁷
Cl-38	10	10⁵	10	10¹³	10⁶
Argon	Argon	Argon	Argon	Argon	Argon
Ar-37	0.01	10⁸	10⁶	10¹³
Ar-41	0.01	10⁹	10²	10⁹
Potassium	Potassium	Potassium	Potassium	Potassium	Potassium
K-40[^f01000]	1	10⁶	10²	10¹⁰	10⁷
K-42	10²	10⁶	10²	10¹²	10⁷
K-43	10	10⁶	10	10¹¹	10⁷
Calcium	Calcium	Calcium	Calcium	Calcium	Calcium
Ca-45	10²	10⁷	10⁴	10¹⁰	10⁸
Ca-47	10	10⁶	10	10¹¹	10⁷
Scandium	Scandium	Scandium	Scandium	Scandium	Scandium
Sc-46	0.1	10⁶	10	10¹⁰	10⁷
Sc-47	10²	10⁶	10²	10¹¹	10⁷
Sc-48	1	10⁵	10	10¹¹	10⁶
Vanadium	Vanadium	Vanadium	Vanadium	Vanadium	Vanadium
V-48	1	10⁵	10	10¹⁰	10⁶
Chromium	Chromium	Chromium	Chromium	Chromium	Chromium
Cr-51	10²	10⁷	10³	10¹²	10⁸
Manganese	Manganese	Manganese	Manganese	Manganese	Manganese
Mn-51	10	10⁵	10	10¹³	10⁶
Mn-52	1	10⁵	10	10¹⁰	10⁶
Mn-52m	10	10⁵	10	10¹³	10⁶
Mn-53	10²	10⁹	10⁴	10¹²	10¹⁰
Mn-54	0.1	10⁶	10	10¹¹	10⁷
Mn-56	10	10⁵	10	10¹²	10⁶
Iron	Iron	Iron	Iron	Iron	Iron
Fe-52+	10	10⁶	10	10¹²	10⁷
Fe-55	10³	10⁶	10⁴	10¹¹	10⁷
Fe-59	1	10⁶	10	10¹⁰	10⁷
Cobalt	Cobalt	Cobalt	Cobalt	Cobalt	Cobalt
Co-55	10	10⁶	10	10¹¹	10⁷
Co-56	0.1	10⁵	10	10¹⁰	10⁶
Co-57	1	10⁶	10²	10¹¹	10⁷
Co-58	1	10⁶	10	10¹⁰	10⁷
Co-58m	10⁴	10⁷	10⁴	10¹³	10⁸
Co-60	0.1	10⁵	10	10¹⁰	10⁶
Co-60m	10³	10⁶	10³	10¹⁶	10⁷
Co-61	10²	10⁶	10²	10¹³	10⁷
Co-62m	10	10⁵	10	10¹³	10⁶
Nickel	Nickel	Nickel	Nickel	Nickel	Nickel
Ni-59	10²	10⁸	10⁴	10¹¹	10⁹
Ni-63	10²	10⁸	10⁵	10¹¹	10⁹
Ni-65	10	10⁶	10	10¹³	10⁷
Copper	Copper	Copper	Copper	Copper	Copper
Cu-64	10²	10⁶	10²	10¹²	10⁷
Zinc	Zinc	Zinc	Zinc	Zinc	Zinc
Zn-65	0.1	10⁶	10	10¹⁰	10⁷
Zn-69	10³	10⁶	10⁴	10¹⁴	10⁷
Zn-69m+	10	10⁶	10²	10¹²	10⁷
Gallium	Gallium	Gallium	Gallium	Gallium	Gallium
Ga-68	0.01	10⁵	10	10¹³	10⁶
Ga-72	10	10⁵	10	10¹¹	10⁶
Germanium	Germanium	Germanium	Germanium	Germanium	Germanium
Ge-68+	0.01	10⁵	10	10¹⁰	10⁶
Ge-71	10⁴	10⁸	10⁴	10¹³	10⁹
Arsenic	Arsenic	Arsenic	Arsenic	Arsenic	Arsenic
As-73	10³	10⁷	10³	10¹¹	10⁸
As-74	10	10⁶	10	10¹¹	10⁷
As-76	10	10⁵	10²	10¹¹	10⁶
As-77	10³	10⁶	10³	10¹²	10⁷
Selenium	Selenium	Selenium	Selenium	Selenium	Selenium
Se-75	1	10⁶	10²	10¹¹	10⁷
Bromine	Bromine	Bromine	Bromine	Bromine	Bromine
Br-82	1	10⁶	10	10¹¹	10⁷
Krypton	Krypton	Krypton	Krypton	Krypton	Krypton
Kr-74	0.01	10⁹	10²	10⁹
Kr-76	0.01	10⁹	10²	10¹⁰
Kr-77	0.01	10⁹	10²	10⁹
Kr-79	0.01	10⁵	10³	10¹⁰
Kr-81	0.01	10⁷	10⁴	10¹¹
Kr-83m	0.01	10¹²	10⁵	10¹²
Kr-85	0.01	10⁴	10⁵	10¹²
Kr-85m	0.01	10¹⁰	10³	10¹⁰
Kr-87	0.01	10⁹	10²	10⁹
Kr-88	0.01	10⁹	10²	10⁹
Rubidium	Rubidium	Rubidium	Rubidium	Rubidium	Rubidium
Rb-86	10²	10⁵	10²	10¹¹	10⁶
Strontium	Strontium	Strontium	Strontium	Strontium	Strontium
Sr-85	1	10⁶	10²	10¹¹	10⁷
Sr-85m	10²	10⁷	10²	10¹³	10⁸
Sr-87m	10²	10⁶	10²	10¹³	10⁷
Sr-89	10³	10⁶	10³	10¹⁰	10⁷
Sr-90+	1	10⁴	10²	10⁹	10⁵
Sr-91+	10	10⁵	10	10¹²	10⁶
Sr-92	10	10⁶	10	10¹²	10⁷
Yttrium	Yttrium	Yttrium	Yttrium	Yttrium	Yttrium
Y-90	10³	10⁵	10³	10¹¹	10⁶
Y-91	10²	10⁶	10³	10¹⁰	10⁷
Y-91m	10²	10⁶	10²	10¹³	10⁷
Y-92	10²	10⁵	10²	10¹²	10⁶
Y-93	10²	10⁵	10²	10¹²	10⁶
Zirconium	Zirconium	Zirconium	Zirconium	Zirconium	Zirconium
Zr-93+	10	10⁷	10³	10⁹	10⁸
Zr-95+	1	10⁶	10	10¹⁰	10⁷
Zr-97+	10	10⁵	10	10¹¹	10⁶
Niobium	Niobium	Niobium	Niobium	Niobium	Niobium
Nb-93m	10	10⁷	10⁴	10¹¹	10⁸
Nb-94	0.1	10⁶	10	10⁹	10⁷
Nb-95	1	10⁶	10	10¹¹	10⁷
Nb-97+	10	10⁶	10	10¹³	10⁷
Nb-98	10	10⁵	10	10¹³	10⁶
Molybdenum	Molybdenum	Molybdenum	Molybdenum	Molybdenum	Molybdenum
Mo-90	10	10⁶	10	10¹²	10⁷
Mo-93	10	10⁸	10³	10¹¹	10⁹
Mo-99+	10	10⁶	10²	10¹¹	10⁷
Mo-101+	10	10⁶	10	10¹³	10⁷
Technetium	Technetium	Technetium	Technetium	Technetium	Technetium
Tc-96	1	10⁶	10	10¹¹	10⁷
Tc-96m	10³	10⁷	10³	10¹⁴	10⁸
Tc-97	10	10⁸	10³	10¹²	10⁹
Tc-97m	10²	10⁷	10³	10¹⁰	10⁸
Tc-99	1	10⁷	10⁴	10¹⁰	10⁸
Tc-99m	10²	10⁷	10²	10¹³	10⁸
Ruthenium	Ruthenium	Ruthenium	Ruthenium	Ruthenium	Ruthenium
Ru-97	10	10⁷	10²	10¹²	10⁸
Ru-103+	1	10⁶	10²	10¹⁰	10⁷
Ru-105+	10	10⁶	10	10¹²	10⁷
Ru-106+	0.1	10⁵	10²	10⁹	10⁶
Rhodium	Rhodium	Rhodium	Rhodium	Rhodium	Rhodium
Rh-103m	10⁴	10⁸	10⁴	10¹⁵	10⁹
Rh-105	10²	10⁷	10²	10¹²	10⁸
Palladium	Palladium	Palladium	Palladium	Palladium	Palladium
Pd-103+	10³	10⁸	10³	10¹¹	10⁹
Pd-109+	10²	10⁶	10³	10¹²	10⁷
Silver	Silver	Silver	Silver	Silver	Silver
Ag-105	1	10⁶	10²	10¹¹	10⁷
Ag-108m+	0.1	10⁶	10	10¹⁰	10⁷
Ag-110m+	0.1	10⁶	10	10¹⁰	10⁷
Ag-111	10²	10⁶	10³	10¹¹	10⁷
Cadmium	Cadmium	Cadmium	Cadmium	Cadmium	Cadmium
Cd-109+	1	10⁶	10⁴	10¹⁰	10⁷
Cd-115+	10	10⁶	10²	10¹¹	10⁷
Cd-115m+	10²	10⁶	10³	10¹⁰	10⁷
Indium	Indium	Indium	Indium	Indium	Indium
In-111	10	10⁶	10²	10¹¹	10⁷
In-113m	10²	10⁶	10²	10¹³	10⁷
In-114m+	10	10⁶	10²	10¹⁰	10⁷
In-115m	10²	10⁶	10²	10¹³	10⁷
Tin	Tin	Tin	Tin	Tin	Tin
Sn-113+	1	10⁷	10³	10¹¹	10⁸
Sn-125	10	10⁵	10²	10¹⁰	10⁶
Antimony	Antimony	Antimony	Antimony	Antimony	Antimony
Sb-122	10	10⁴	10²	10¹¹	10⁵
Sb-124	1	10⁶	10	10¹⁰	10⁷
Sb-125+	0.1	10⁶	10²	10¹⁰	10⁷
Tellurium	Tellurium	Tellurium	Tellurium	Tellurium	Tellurium
Te-123m	1	10⁷	10²	10¹⁰	10⁸
Te-125m	10³	10⁷	10³	10¹⁰	10⁸
Te-127	10³	10⁶	10³	10¹²	10⁷
Te-127m+	10	10⁷	10³	10¹⁰	10⁸
Te-129	10²	10⁶	10²	10¹⁴	10⁷
Te-129m+	10	10⁶	10³	10¹⁰	10⁷
Te-131	10²	10⁵	10²	10¹⁴	10⁶
Te-131m+	10	10⁶	10	10¹¹	10⁷
Te-132+	1	10⁷	10²	10¹¹	10⁸
Te-133	10	10⁵	10	10¹⁴	10⁶
Te-133m	10	10⁵	10	10¹³	10⁶
Te-134	10	10⁶	10	10¹³	10⁷
Iodine	Iodine	Iodine	Iodine	Iodine	Iodine
I-123	10²	10⁷	10²	10¹²	10⁸
I-125	10²	10⁶	10³	10¹⁰	10⁷
I-126	10	10⁶	10²	10¹⁰	10⁷
I-129	0.01	10⁵	10²	10⁹	10⁶
I-130	10	10⁶	10	10¹¹	10⁷
I-131	10	10⁶	10²	10¹⁰	10⁷
I-132	10	10⁵	10	10¹²	10⁶
I-133	10	10⁶	10	10¹¹	10⁷
I-134	10	10⁵	10	10¹³	10⁶
I-135	10	10⁶	10	10¹²	10⁷
Xenon	Xenon	Xenon	Xenon	Xenon	Xenon
Xe-131m	0.01	10⁴	10⁴	10¹¹
Xe-133	0.01	10⁴	10³	10¹¹
Xe-135	0.01	10¹⁰	10³	10¹⁰
Caesium	Caesium	Caesium	Caesium	Caesium	Caesium
Cs-129	10	10⁵	10²	10¹²	10⁶
Cs-131	10³	10⁶	10³	10¹²	10⁷
Cs-132	10	10⁵	10	10¹¹	10⁶
Cs-134	0.1	10⁴	10	10¹⁰	10⁵
Cs-134m	10³	10⁵	10³	10¹⁴	10⁶
Cs-135	10²	10⁷	10⁴	10¹¹	10⁸
Cs-136	1	10⁵	10	10¹⁰	10⁶
Cs-137+	0.1	10⁴	10	10¹⁰	10⁵
Cs-138	10	10⁴	10	10¹³	10⁵
Barium	Barium	Barium	Barium	Barium	Barium
Ba-131	10	10⁶	10²	10¹¹	10⁷
Ba-140+	1	10⁵	10	10¹¹	10⁶
Lanthanum	Lanthanum	Lanthanum	Lanthanum	Lanthanum	Lanthanum
La-140	1	10⁵	10	10¹¹	10⁶
Cerium	Cerium	Cerium	Cerium	Cerium	Cerium
Ce-139	1	10⁶	10²	10¹¹	10⁷
Ce-141	10²	10⁷	10²	10¹⁰	10⁸
Ce-143	10	10⁶	10²	10¹¹	10⁷
Ce-144+	10	10⁵	10²	10⁹	10⁶
Praseodymium	Praseodymium	Praseodymium	Praseodymium	Praseodymium	Praseodymium
Pr-142	10²	10⁵	10²	10¹²	10⁶
Pr-143	10³	10⁶	10⁴	10¹¹	10⁷
Neodymium	Neodymium	Neodymium	Neodymium	Neodymium	Neodymium
Nd-147	10²	10⁶	10²	10¹¹	10⁷
Nd-149	10²	10⁶	10²	10¹³	10⁷
Promethium	Promethium	Promethium	Promethium	Promethium	Promethium
Pm-147	10³	10⁷	10⁴	10¹⁰	10⁸
Pm-149	10³	10⁶	10³	10¹¹	10⁷
Samarium	Samarium	Samarium	Samarium	Samarium	Samarium
Sm-151	10³	10⁸	10⁴	10¹⁰	10⁹
Sm-153	10²	10⁶	10²	10¹¹	10⁷
Europium	Europium	Europium	Europium	Europium	Europium
Eu-152	0.1	10⁶	10	10⁹	10⁷
Eu-152m	10²	10⁶	10²	10¹²	10⁷
Eu-154	0.1	10⁶	10	10⁹	10⁷
Eu-155	1	10⁷	10²	10¹⁰	10⁸
Gadolinium	Gadolinium	Gadolinium	Gadolinium	Gadolinium	Gadolinium
Gd-153	10	10⁷	10²	10¹⁰	10⁸
Gd-159	10²	10⁶	10³	10¹²	10⁷
Terbium	Terbium	Terbium	Terbium	Terbium	Terbium
Tb-160	1	10⁶	1	10¹⁰	10⁷
Dysprosium	Dysprosium	Dysprosium	Dysprosium	Dysprosium	Dysprosium
Dy-165	10³	10⁶	10³	10¹³	10⁷
Dy-166	10²	10⁶	10³	10¹¹	10⁷
Holmium	Holmium	Holmium	Holmium	Holmium	Holmium
Ho-166	10²	10⁵	10³	10¹¹	10⁶
Erbium	Erbium	Erbium	Erbium	Erbium	Erbium
Er-169	10³	10⁷	10⁴	10¹¹	10⁸
Er-171	10²	10⁶	10²	10¹²	10⁷
Thulium	Thulium	Thulium	Thulium	Thulium	Thulium
Tm-170	10²	10⁶	10³	10¹⁰	10⁷
Tm-171	10³	10⁸	10⁴	10¹¹	10⁹
Ytterbium	Ytterbium	Ytterbium	Ytterbium	Ytterbium	Ytterbium
Yb-175	10²	10⁷	10³	10¹¹	10⁸
Lutetium	Lutetium	Lutetium	Lutetium	Lutetium	Lutetium
Lu-177	10²	10⁷	10³	10¹¹	10⁸
Hafnium	Hafnium	Hafnium	Hafnium	Hafnium	Hafnium
Hf-181	1	10⁶	10	10¹⁰	10⁷
Tantalum	Tantalum	Tantalum	Tantalum	Tantalum	Tantalum
Ta-182	0.1	10⁴	10	10¹⁰	10⁵
Tungsten	Tungsten	Tungsten	Tungsten	Tungsten	Tungsten
W-181	10	10⁷	10³	10¹²	10⁸
W-185	10³	10⁷	10⁴	10¹¹	10⁸
W-187	10	10⁶	10²	10¹²	10⁷
Rhenium	Rhenium	Rhenium	Rhenium	Rhenium	Rhenium
Re-186	10³	10⁶	10³	10¹¹	10⁷
Re-188	10²	10⁵	10²	10¹²	10⁶
Osmium	Osmium	Osmium	Osmium	Osmium	Osmium
Os-185	1	10⁶	10	10¹¹	10⁷
Os-191	10²	10⁷	10²	10¹¹	10⁸
Os-191m	10³	10⁷	10³	10¹²	10⁸
Os-193	10²	10⁶	10²	10¹¹	10⁷
Iridium	Iridium	Iridium	Iridium	Iridium	Iridium
Ir-190	1	10⁶	10	10¹⁰	10⁷
Ir-192	1	10⁴	10	10¹⁰	10⁵
Ir-194	10²	10⁵	10²	10¹¹	10⁶
Platinum	Platinum	Platinum	Platinum	Platinum	Platinum
Pt-191	10	10⁶	10²	10¹¹	10⁷
Pt-193m	10³	10⁷	10³	10¹²	10⁸
Pt-197	10	10⁶	10³	10¹²	10⁷
Pt-197m	10²	10⁶	10²	10¹⁴	10⁷
Gold	Gold	Gold	Gold	Gold	Gold
Au-198	10	10⁶	10²	10¹¹	10⁷
Au-199	10²	10⁶	10²	10¹¹	10⁷
Mercury	Mercury	Mercury	Mercury	Mercury	Mercury
Hg-197	10²	10⁷	10²	10¹²	10⁸
Hg-197m	10²	10⁶	10²	10¹²	10⁷
Hg-203	10	10⁵	10²	10¹¹	10⁶
Thallium	Thallium	Thallium	Thallium	Thallium	Thallium
Tl-200	10	10⁶	10	10¹¹	10⁷
Tl-201	10²	10⁶	10²	10¹²	10⁷
Tl-202	10	10⁶	10²	10¹¹	10⁷
Tl-204	1	10⁴	10⁴	10¹¹	10⁵
Lead	Lead	Lead	Lead	Lead	Lead
Pb-203	10	10⁶	10²	10¹²	10⁷
Pb-210+	0.01	10⁴	10	10⁸	10⁵
Pb-212+	1	10⁵	10	10¹⁰	10⁶
Bismuth	Bismuth	Bismuth	Bismuth	Bismuth	Bismuth
Bi-206	1	10⁵	10	10¹⁰	10⁶
Bi-207	0.1	10⁶	10	10¹⁰	10⁷
Bi-210	10	10⁶	10³	10⁹	10⁷
Bi-212+	1	10⁵	10	10¹¹	10⁶
Polonium	Polonium	Polonium	Polonium	Polonium	Polonium
Po-203	10	10⁶	10	10¹³	10⁷
Po-205	10	10⁶	10	10¹²	10⁷
Po-207	10	10⁶	10	10¹²	10⁷
Po-210	0.01	10⁴	10	10⁷	10⁵
Astatine	Astatine	Astatine	Astatine	Astatine	Astatine
At-211	10³	10⁷	10³	10¹⁰	10⁸
Radon	Radon	Radon	Radon	Radon	Radon
Rn-220+	0.01	10⁷	10⁴	10⁸	10⁸
Rn-222+	0.01	10⁸	10	10⁹	10⁹
Radium	Radium	Radium	Radium	Radium	Radium
Ra-223+	1	10⁵	10²	10⁷	10⁶
Ra-224+	1	10⁵	10	10⁸	10⁶
Ra-225	10	10⁵	10²	10⁷	10⁶
Ra-226+	0.01	10⁴	10	10⁷	10⁵
Ra-227	10²	10⁶	10²	10¹³	10⁷
Ra-228+	0.01	10⁵	10	10⁸	10⁶
Actinium	Actinium	Actinium	Actinium	Actinium	Actinium
Ac-228	1	10⁶	10	10¹⁰	10⁷
Thorium	Thorium	Thorium	Thorium	Thorium	Thorium
Th-226+	10³	10⁷	10³	10¹¹	10⁸
Th-227	1	10⁴	10	10⁷	10⁵
Th-228+	0.1	10⁴	1	10⁶	10⁵
Th-229+	0.1	10³	1	10⁶	10⁴
Th-230	0.1	10⁴	1	10⁶	10⁵
Th-231	10²	10⁷	10³	10¹²	10⁸
Th-232	0.01	10⁴	10	10⁶	10⁵
Th-234+	10	10⁵	10³	10¹⁰	10⁶
Protactinium	Protactinium	Protactinium	Protactinium	Protactinium	Protactinium
Pa-230	10	10⁶	10	10⁸	10⁷
Pa-231	0.01	10³	1	10⁶	10⁴
Pa-233	10	10⁷	10²	10¹⁰	10⁸
Uranium	Uranium	Uranium	Uranium	Uranium	Uranium
U-230+	10	10⁵	10	10⁷	10⁶
U-231	10²	10⁷	10²	10¹¹	10⁸
U-232+	0.1	10³	1	10⁶	10⁴
U-233	1	10⁴	10	10⁷	10⁵
U-234	1	10⁴	10	10⁷	10⁵
U-235+	1	10⁴	10	10⁷	10⁵
U-236	10	10⁴	10	10⁷	10⁵
U-237	10²	10⁶	10²	10¹¹	10⁷
U-238+	1	10⁴	10	10⁷	10⁵
U-239	10²	10⁶	10²	10¹⁴	10⁷
U-240	0.01	10⁷	10³	10¹²	10⁸
U-240+	10²	10⁶	10	10¹¹	10⁷
Neptunium	Neptunium	Neptunium	Neptunium	Neptunium	Neptunium
Np-237+	1	10³	1	10⁷	10⁴
Np-239	10²	10⁷	10²	10¹¹	10⁸
Np-240	10	10⁶	10	10¹³	10⁷
Plutonium	Plutonium	Plutonium	Plutonium	Plutonium	Plutonium
Pu-234	10²	10⁷	10²	10¹⁰	10⁸
Pu-235	10²	10⁷	10²	10¹⁴	10⁸
Pu-236	1	10⁴	10	10⁷	10⁵
Pu-237	10²	10⁷	10³	10¹¹	10⁸
Pu-238	0.1	10⁴	1	10⁶	10⁵
Pu-239	0.1	10⁴	1	10⁶	10⁵
Pu-240	0.1	10³	1	10⁶	10⁴
Pu-241	10	10⁵	10²	10⁸	10⁶
Pu-242	0.1	10⁴	1	10⁶	10⁵
Pu-243	10³	10⁷	10³	10¹³	10⁸
Pu-244+	0.1	10⁴	1	10⁶	10⁵
Americium	Americium	Americium	Americium	Americium	Americium
Am-241	0.1	10⁴	1	10⁶	10⁵
Am-242	10³	10⁶	10³	10¹⁰	10⁷
Am-242m+	0.1	10⁴	1	10⁶	10⁵
Am-243+	0.1	10³	1	10⁶	10⁴
Curium	Curium	Curium	Curium	Curium	Curium
Cm-242	10	10⁵	10²	10⁷	10⁶
Cm-243	1	10⁴	1	10⁷	10⁵
Cm-244	1	10⁴	10	10⁷	10⁵
Cm-245	0.1	10³	1	10⁶	10⁴
Cm-246	0.1	10³	1	10⁶	10⁴
Cm-247+	0.1	10⁴	1	10⁶	10⁵
Cm-248	0.1	10³	1	10⁶	10⁴
Berkelium	Berkelium	Berkelium	Berkelium	Berkelium	Berkelium
Bk-249	10²	10⁶	10³	10⁹	10⁷
Californium	Californium	Californium	Californium	Californium	Californium
Cf-246	10³	10⁶	10³	10⁹	10⁷
Cf-248	1	10⁴	10	10⁷	10⁵
Cf-249	0.1	10³	1	10⁶	10⁴
Cf-250	1	10⁴	10	10⁶	10⁵
Cf-251	0.1	10³	1	10⁶	10⁴
Cf-252	1	10⁴	10	10⁷	10⁵
Cf-253	10²	10⁵	10²	10⁸	10⁶
Cf-254	1	10³	1	10⁷	10⁴
Einsteinium	Einsteinium	Einsteinium	Einsteinium	Einsteinium	Einsteinium
Es-253	10²	10⁵	10²	10⁸	10⁶
Es-254+	0.1	10⁴	10	10⁷	10⁵
Es-254m+	10	10⁶	10²	10⁹	10⁷
Fermium	Fermium	Fermium	Fermium	Fermium	Fermium
Fm-254	10⁴	10⁷	10⁴	10¹⁰	10⁸
Fm-255	10²	10⁶	10³	10⁹	10⁷
Other radionuclides not listed above (see Note 1)	Other radionuclides not listed above (see Note 1)	Other radionuclides not listed above (see Note 1)	Other radionuclides not listed above (see Note 1)	Other radionuclides not listed above (see Note 1)	Other radionuclides not listed above (see Note 1)
	0.01	10³	0.1	10⁵	10⁴
Note 1 In the case of radionuclides not specified elsewhere in this Part, the quantities specified in this entry are to be used unless the Executive has approved some other quantity for that radionuclide.	Note 1 In the case of radionuclides not specified elsewhere in this Part, the quantities specified in this entry are to be used unless the Executive has approved some other quantity for that radionuclide.	Note 1 In the case of radionuclides not specified elsewhere in this Part, the quantities specified in this entry are to be used unless the Executive has approved some other quantity for that radionuclide.	Note 1 In the case of radionuclides not specified elsewhere in this Part, the quantities specified in this entry are to be used unless the Executive has approved some other quantity for that radionuclide.	Note 1 In the case of radionuclides not specified elsewhere in this Part, the quantities specified in this entry are to be used unless the Executive has approved some other quantity for that radionuclide.	Note 1 In the case of radionuclides not specified elsewhere in this Part, the quantities specified in this entry are to be used unless the Executive has approved some other quantity for that radionuclide.
Note 2 Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions for those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note 2 Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions for those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note 2 Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions for those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note 2 Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions for those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note 2 Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions for those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note 2 Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions for those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).
Parent radionuclide	Progeny
---	---
Fe-52	Mn-52m
Zn-69m	Zn-69
Ge-68	Ga-68
Sr-90	Y-90
Sr-91	Y-91m
Zr-93	Nb-93m
Zr-95	Nb-95
Zr-97	Nb-97m, Nb-97
Nb-97	Nb-97m
Mo-99	Tc-99m
Mo-101	Tc-101
Ru-103	Rh-103m
Ru-105	Rh-105m
Ru-106	Rh-106
Pd-103	Rh-103m
Pd-109	Ag-109m
Ag-108m	Ag-108
Ag-110m	Ag-110
Cd-109	Ag-109m
Cd-115	In-115m
Cd-115m	In-115m
In-114m	In-114
Sn-113	In-113m
Sb-125	Te-125m
Te-127m	Te-127
Te-129m	Te-129
Te-131m	Te-131
Te-132	I-132
Cs-137	Ba-137m
Ba-140	La-140
Ce-144	Pr-144, Pr-144m
Pb-210	Bi-210, Po-210
Pb-212	Bi-212, Tl-208, Po-212
Bi-212	Tl-208, Po-212
Rn-220	Po-216
Rn-222	Po-218, Pb-214, Bi-214, Po-214
Ra-223	Rn-219, Po-215, Pb-211, Bi-211, Tl-207
Ra-224	Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212
Ra-226	Rn-222, Po-218, Pb-214, Bi-214, Po-214, Pb-210, Bi-210, Po-210
Ra-228	Ac-228
Th-226	Ra-222, Rn-218, Po-214
Th-228	Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212
Th-229	Ra-225, Ac-225, Fr-221, At-217, Bi-213, Po-213, Pb-209
Th-234	Pa-234m
U-230	Th-226, Ra-222, Rn-218, Po-214
U-232	Th-228, Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212
U-235	Th-231
U-238	Th-234, Pa-234m
U-240	Np-240m, Np-240
Np-237	Pa-233
Pu-244	U-240, Np-240m, Np-240
Am-242m	Am-242, Np-238
Am-243	Np-239
Cm-247	Pu-243
Es-254	Bk-250
Es-254m	Fm-254

PART 2 — Table of naturally occurring radionuclides (which are not processed for their radioactive, fissile or fertile properties)

1	2	3	4
Radionuclide name, symbol, isotope	Concentration for: Notification (any amount of radioactive material); Registration (amounts of radioactive material that exceed 1,000kg)	Quantity for Notification	Concentration for Registration (amounts of radioactive material that do not exceed 1,000kg)
	Regulation 5(1) and Schedule 1, paragraph 1(a); regulation 6(2)(f)	Regulation 5(1) and Schedule 1, paragraph 1(b)	Regulation 6(2)(e)
	(Bq/g)	(Bq)	(Bq/g)
(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.	(1) Potassium salts in quantities less than 1,000kg are exempt.
K-40[^f01001]	10	10⁶	10²
Rb-87	1	10⁷	10⁴
Pb-210+	1	10⁴	10
Po-210	1	10⁴	10
Ra-226+	1	10⁴	10
Ra-228+	1	10⁵	10
Th-228+	1	10⁴	1
Th-232 sec	1	10³	1
U-238 sec	1	10³	1
Note Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions of those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions of those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions of those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).	Note Nuclides carrying the suffix “+” in the above table represent parent nuclides and their progeny as listed in the table below. The dose contributions of those progeny are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered).
Parent radionuclide	Progeny
---	---
Pb-210	Bi-210, Po-210
Ra-226	Rn-222, Po-218, Pb-214, Bi-214, Po-214, Pb-210, Bi-210, Po-210
Ra-228	Ac-228
Th-228	Ra-224, Rn-220, Po-216, Pb-212, Bi-212, Tl-208, Po-212

PART 3 — Quantity and concentration ratios for more than one radionuclide

1

For the purpose of Regulation 2(4)—

• (a) the quantity ratio for more than one radionuclide is the sum of the quotients of the quantity of a radionuclide present Qp divided by the quantity of that radionuclide specified in the appropriate entry in Parts 1, 2 or 4 of this Schedule Qlim, namely—

• (b) the concentration ratio for more than one radionuclide is the sum of the quotients of the concentration of a radionuclide present Cp divided by the concentration of that radionuclide specified in the appropriate entry in Parts 1 or 2 of this Schedule Clim, namely—

2

In any case where the isotopic composition of a radioactive substance is not known or is only partially known, the quantity or concentration ratio for that substance is to be calculated by using the values specified in the appropriate column in Part 1 of this Schedule for “other radionuclides not listed above” for any radionuclide that has not been identified or where the quantity or concentration of a radionuclide is uncertain, unless the employer can show that the use of some other value is appropriate in the circumstances of a particular case, when the employer may use that value.