The Nuclear Installations (Prescribed Conditions and Excepted Matter) Regulations 2025

• Citation: S.I. 2025/1171
• Sections: 3

Section 1 Citation, commencement and extent

(1) These Regulations may be cited as the Nuclear Installations (Prescribed Conditions and Excepted Matter) Regulations 2025 and come into force on 2nd December 2025.

(2) These Regulations extend to England and Wales, Scotland and Northern Ireland.

Section 2 Prescribed conditions

(1) The conditions prescribed under section 7C(1)(a)(iii) of the Act are that, during the lifetime of the site—

(a) the effective dose from radiation released from the site to a member of the public off site would be no greater than 1 millisievert in any 12-month period in all reasonably foreseeable circumstances and assuming no protective or mitigating actions are taken (the dose condition);

(b) the risk of criticality occurring on the site is negligible (the criticality condition).

(2) In this regulation—

(a) “ Act ” means the Nuclear Installations Act 1965;

(b) “ effective dose ” has the meaning given by section 11H(11) of the Act ;

(c) “ the lifetime of the site ” means the period during which the site is subject to an appropriate permit .

Section 3 Amendment to the Nuclear Installations (Excepted Matter) Regulations 2017

(1) The Nuclear Installations (Excepted Matter) Regulations 2017 are amended as follows.

(2) In regulation 3 (excepted matter)—

(a) in paragraph (1), for “paragraph (2) or (3)” substitute “paragraph (2), (3) or (4)” ;

(b) after paragraph (3) insert—

(4) The requirement in this paragraph is that the nuclear matter has been disposed of in an installation for the disposal of nuclear matter on an excluded disposal site .