# The Radiation (Emergency Preparedness and Public Information) Regulations 2019, Paragraph 9

Extent: E+W+S

In this Schedule “source term” means the radioactivity which could give rise to direct external exposures from the premises or which could be released to the environment in a radiation emergency and, for releases, includes—
(a) the amount of each radionuclide released;
(b) the time distribution of the release;
(c) the energy associated with atmospheric release; and
(d) the likely chemical and physical form of the radionuclides in the release.

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Source: https://www.legislation.gov.uk/uksi/2019/703/schedule/3/paragraph/9 (the official version)
Page: https://openlegislation.uk/radiation-emergency-preparedness-and-public-information-regulations-2019/schedule-3/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.