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Exempt activities of radionuclides

Exempt activities of radionuclides — the activities of a sources of ionizing radiation in a room or in the workplace above which the permission of the State Sanitary and Epidemiological Supervision Authority to use these sources is required (if the values of the exempt activities concentration is also exceeded.)

Radionuclide * Exempt activity of radionuclide
μCi kBq
14С 270 10000
22Na 27 1000
40К 27 1000
44Ti 2.7 100
54Mn 27 1000
55Fe 27 1000
57Co 27 1000
60Co 2.7 100
63Ni 2700 100000
65Zn 27 1000
68Ge 2.7 100
85Sr 27 1000
85Kr 0.27 10
88Y 27 1000
90Sr (90Y) 0.27 10
109Cd 27 1000
110mAg 27 1000
113Sn 270 10000
119mSn 270 10000
121mSn 270 10000
124I 27 1000
125I 27 1000
131I 27 1000
133Ba 2.7 100
134Cs 0.27 10
137Cs (137mBa) 0.27 10
139Ce 27 1000
147Pm 270 10000
151Sm 2700 100000
152Eu 27 1000
153Gd 270 10000
169Yb 270 10000
207Bi 27 1000
226Ra (222Rn, 218Po, 214Pb, 214Bi, 214Po, 210Pb, 210Bi, 210Po) 0.27 10
228Th (224Ra, 220Rn, 216Po, 212Pb, 212Bi, 208Ti, 212Po) 0.27 10
232Th (228Ra, 228Ac, 228Th, 224Ra, 220Rn, 216Po, 212Pb, 212Bi) 0.027 1
232U 0.027 1
U-natural 0.027 1
241Am (208Tl, 212Po) 0.27 10
243Am 0.027 1
* If several radionuclides, the sum of the ratio of activities to their table values should not exceed one