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Page Title:
Table 2 -2. Properties of Radionuclides That May Be Found at Uranium Facilities(a) |
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|  DOE-STD -1136-2004
Guide of Good Practices for Occupational Radiation Protection in Uranium Facilities
Table 2 -2. Properties of Radionuclides That May Be Found at Uranium Facilities(a)
Energies (MeV) and Abundances
of Major Radiations
(All low yield radiations are not included)
Nuclide
Half-Life
Alpha
Beta
Gamma
Primary Uranium
4.15 (21%)
238
4.51 x 109 y
U
4.20 (79%)
4.21 (6%)
0.144 (11%)
4.37 (17%)
0.163 (5%)
235
7.1 x 108 y
U
4.40 (55%)
0.186 (57%)
4.60 (5%)
0.205 (5%)
4.72 (28%)
0.053
234
2.47 x 105 y
U
4.77 (72%)
(0.12%)
Decay Products
0.013 (9.8%)
0.103 (21%)
0.063 (3.5%)
234
Th
24.1 d
0.193 (79%)
0.092 (3%)
0.093 (4%)
0.765
(0.30%)
234m
Pa
1.17 m
2.29 (98%)
1.001
(0.60%)
0.206 (13%)
0.026 (2%)
0.287 (12%)
231
Th
25.5 h
0.084 (10%)
0.288 (37%)
0.305 (35%)
Impurities (e.g.
irradiation and
reprocessing
artifacts)
99
2.12x105 y
Tc
0.292
4.78 (75%)
237
2.14x106 y
Np
4.65 (12%)
5.50 (72%)
238
Pu
86.4 y
5.46 (28%)
5.16 (88%)
239
2.44x104 y
Pu
5.11 (11%)
5.17 (76%)
240
6.6x103 y
Pu
5.12 (24%)
241
Pu
13.2 y
0.021
5.26 (31%)
232
U
72 y
5.32 (69%)
4.47 (24%)
236
2.34x107 y
U
4.52 (76%)
(a) From EGG-2530 (1988).
2- 3
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