# The Nuclear Installations (Prescribed Sites) Regulations 1983, Regulation 3: Prescribed Sites


There is hereby prescribed for the purposes of section 16(1) of the Act any site in respect of which a nuclear site licence is for the time being in force on which:
(1) the quantity of radionuclides present at any time is such that their total activity does not exceed the limits of activity prescribed in regulation 4 of these Regulations; or
(2) the only nuclear reactor is a small nuclear reactor and the quantity of radionuclides outside the reactor other than associated nuclear fuel present at any time is such that their total activity does not exceed one half of the limits of activity prescribed in regulation 4 of these Regulations; and
(3) in either case the total mass of fissile materials (other than those comprised in associated nuclear fuel) present at any time does not exceed the limits prescribed by regulation 5 of these Regulations.

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Source: https://www.legislation.gov.uk/uksi/1983/919/regulation/3 (the official version)
Page: https://openlegislation.uk/nuclear-installations-prescribed-sites-regulations-1983/regulation-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.