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Page Title:
Table 2 -6. ALIs and DACs for Uranium and Selected Contaminants in Recycled Uranium |
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|  DOE-STD -1136-2004
_ Guide of Good Practices for Occupational Radiation Protection in Uranium Facilities
Table 2 -6. ALIs and DACs for Uranium and Selected Contaminants in Recycled Uranium
Inhalation
Nuclide
Class D *
Class W *
Class Y *
Annual Limits on Intake (Bq values converted from the rounded off ALIs), from 10 CFR 20
uCi (Bq)
uCi (Bq)
uCi (Bq)
238
1 (4 x 104)
8 x 10-1 (3 x 104)
4 x 10-2 (1 x 103)
U
235
1 (4 x 104)
8 x 10-1 (3 x 104)
4 x 10-2 (1 x 103)
U
234
1 (4 x 104)
7 x 10-1 (3 x 104)
4 x 10-2 (1 x 103)
U
234
NL1
2 x 102 (7 x 106)
2 x 102 (7 x 106)
Th
234m
Pa
NL
NL
NL
231
6 x 103 (2 x 108)
6 x 103 (2 x 108)
Th
NL
99
5 x 103 (2 x 108)
7 x 102 (3 x 107)
Tc
NL
237
4 x 10-3 (1 x 102)
Np
NL
NL
238
7 x 10-3 (3 x 102)
2 x 10-2 (7 x 102)
Pu
NL
239
6 x 10-3 (2 x 102)
2 x 10-2 (7 x 102)
Pu
NL
240
6 x 10-3 (2 x 102)
2 x 10-2 (7 x 102)
Pu
NL
241
3 x 10-1 (1 x 104)
8 x 10-1 (3 x 104)
Pu
NL
236
1 (4 x 104)
8 x 10-1 (3 x 104)
4 x 10-2 (1 x 103)
U
Inhalation DAC, From 10 CFR 835, Appendix A
uCi/mL (Bq/m3)
uCi/mL (Bq/m3)
uCi/mL (Bq/m3)
238
6 x 10-10 (2 x 101)
3 x 10-10 (1 x 101)
2 x 10-11 (6 x 10-1)
U
235
6 x 10-10 (2 x 101)
3 x 10-10 (1 x 101)
2 x 10-11 (6 x 10-1)
U
234
5 x 10-10 (2 x 101)
3 x 10-10 (1 x 101)
2 x 10-11 (6 x 10-1)
U
234
9 x 10-8 (3 x 103)
6 x 10-8 (2 x 103)
Th
NL
234m
3 x 10-6 (1 x 105)
3 x 10-6 (1 x 105)
Pa
NL
231
3 x 10-6 (1 x 105)
3 x 10-6 (1 x 105)
Th
NL
99
2 x 10-6 (8 x 104)
3 x 10-7 (1 x 104)
Tc
NL
237
2 x 10-12 (9 x 10-2)
Np
NL
NL
238
3 x 10-12 (9 x 10-2)
7 x 10-12 (3 x 10-1)
Pu
NL
239
2 x 10-12 (8 x 10-2)
6 x 10-12 (2 x 10-1)
Pu
NL
240
2 x 10-12 (8 x 10-2)
6 x 10-12 (2 x 10-1)
Pu
NL
241
1 x 10-10 (4)
3 x 10-10 (1 x 101)
Pu
NL
236
6 x 10-10 (2 x 101)
3 x 10-10 (1 x 101)
2 x 10-11 (6 x 10-1)
U
1
NL = Not listed.
* See last paragraph of Section 2.5 for discussion of Class D, W and Y.
2-13
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