# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph


+Parent radionuclides, and their progeny whose dose contributions are taken into account in the dose calculation (thus requiring only the exemption level of the parent radionuclide to be considered), are listed in the following:
Parent radionuclide
Progeny
Sr-90
Y-90
Zr-93
Nb-93m
Zr-97
Nb-97
Ru-106
Rh-106
Ag-108m
Ag-108
Cs-137
Ba-137m
Ba-140
La-140
Ce-144
Pr-144
Pb-210
Bi-210, Po-210
Pb-212
Bi-212, Tl-208 (0.36), Po-212 (0.64)
Bi-212
Tl-208 (0.36), Po-212 (0.64)
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 (0.36), Po-212 (0.64)
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 (0.36), Po-212 (0.64)
Th-229
Ra-225, Ac-225, Fr-221, At-217, Bi-213, Po-213, Pb-209
Th-234
Pa-234 m
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 (0.36), Po-212 (0.64)
U-235
Th-231
U-238
Th-234, Pa-234m
U-240
Np-240 m
Np237
Pa-233
Am-242m
Am-242
Am-243
Np-239

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/9/part/3/paragraph/wrapper8n1 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-9/part-3/paragraph-wrapper8n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.