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Scope of Bioassay Program - doe-std-1128-98_ch10119
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DOE Standard Guide of Good Practices for Occupational Radiological Protection In Plutonium Facilities
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Baseline measurements


DOE-STD-1128-98
Table 5.4. Example Plutonium Isotope Mixtures Immediately Post-Separation wt%
Weapons-Grade
Fuels-Grade
Spent Commercial
Plutonium
Plutonium
Fuel
Isotope
(6% 240Pu Mixture)
(12% 240Pu Mixture)
(25% 240Pu Mixture)
238Pu
0.05
0.10
1.49
239Pu
93.0
84.4
59.50
240Pu
6.1
12.4
23.98
241Pu
0.8
3.0
10.33
242Pu
0.05
0.1
4.0
240Am
0.0
0.0
0.0
Table 5.5. Activity Composition with Age for Reference 6% and 12% 240Pu Mixtures
Reference 12% Pu Mix (a)
.
Reference 6 % Pu Mix (a)
Isotopic
Component
Fresh
Aged
Fresh
Aged
Specific Activity
In Mixture, Ci/g
238Pu
8.6E-3
8.6E-3
1.7E-2
1.6E-2
239+240Pu
7.2E-2
7.2E-2
8.0E-2
8.0E-2
241Pu
8.2E-1
8.2E-1
3.1E+0
2.4E+0
242Pu
2.0E-6
2.0E-6
3.9E-6
3.9E-6
241Am
5.3E-5
5.8E-3
2.0E-4
2.2E-2
Pu-alpha
8.1E-2
8.1E-2
9.7E-2
9.6E-2
Total alpha
8.1E-2
8.1E-2
9.7E-2
1.2E-2
Activity Ratios
Pu:241Am
1.2E+3
1.2E+1
4.1E+2
3.7E+0
239+240
Pu-alpha:241Am
1.5E+3
1.4E+1
4.9E+2
4.4E+0
241Pu:239+240Pu
1.2E+1
9.1E+1
3.8E+1
3.0E+1
(a) % = nominal 240Pu weight percent in mixtures.
Fresh = 2 weeks of 241Am ingrowth following separation.
Aged = 5 years of 241Am ingrowth following separation.
5.3.1
Classification of Bioassay Measurements
Bioassay measurements can be classified according to the primary reason for their
performance. This is a useful practice for historically documenting why a worker
participated in a bioassay program. Numerous reasons for bioassay measurements
may be defined for specific facilities; some suggested common classifications are as
follows:
5-10


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