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Page Title:
Table 5.1. In Vivo Lung Measurement Bioassy Goals(a) for 241Am as an Indicator of Aged Weapons-Grade Plutonium(b) |
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|  DOE-STD-1128-98
Table 5.1. In Vivo Lung Measurement Bioassy Goals(a) for 241Am as an Indicator of Aged
Weapons-Grade Plutonium(b)
Class Y Inhalation
.
Class W Inhalation
Dose Limit
100-mrem
Dose Limit
100-mrem
CEDE Goal (d)
Goal (c)
CEDE Goal (d)
Days Post-
Goal (c)
Intake
nCi 241Am
nCi 241Am
nCi 241Am
nCi 241Am
1
7.2E-02
2.9E-03
1.8E-01
4.1E-03
2
6.1E-02
2.5E-03
1.6E-01
3.5E-03
7
4.7E-02
1.9E-03
1.3E-01
2.9E-03
14
4.3E-02
1.7E-03
1.3E-01
2.9E-03
30
3.5E-02
1.4E-03
1.3E-01
2.8E-03
60
2.4E-02
9.7E-04
1.2E-01
2.7E-03
90
1.6E-02
6.6E-04
1.2E-01
2.6E-03
180
5.1E-03
2.1E-04
1.1E-01
2.4E-03
365
4.6E-04
1.9E-05
8.9E-02
2.0E-03
730
3.8E-06
1.5E-07
6.3E-02
1.4E-03
1825
1.3E-11
5.1E-13
2.5E-02
5.6E-03
3650
6.9E-13
2.7E-14
8.2E-03
1.8E-04
7300
4.6E-14
1.8E-15
3.5E-03
7.8E-05
18250
5.0E-18
2.0E-19
3.0E-03
6.7E-05
(a) Calculated using the CINDY Code (Version 1.3) (Strenge et al., 1992)
(b) Defined as a Pu mixture consisting of, by weight %, 93% 239Pu, 6.1% 240Pu, 0.8% 241Pu, 0.05% 238Pu, and 0.05%
Pu, with 5 years allowed for 241Am ingrowth.
242
(c) Intake of 4.7-nCi Pu-α, 38-nCi 241Pu, and 0.34-nCi 241Am, giving a committed dose equivalent of 50 rem to the
bone surfaces.
(d) Intake of 0.19-nCi Pu- α, 1.5-nCi 241Pu, and 0.014-nCi 241Am, giving a committed effective dose equivalent of 0.1
rem.
(e) Intake of 12-nCi Pu- α , 97-nCi 241Pu, and 0.86-nCi 241Am, giving a committed dose equivalent of 50 rem to the
bone surfaces.
(f) Intake of 0.27-nCi Pu- α, 2.2-nCi 241Pu, and 0.019-nCi 241Am, giving a committed effective dose equivalent of 0.1
rem.
The problem is simply that the measurement technology is not available to provide
the sensitivities required for the 100-mrem goal using routine, periodic measurements
at reasonable frequencies. Therefore, because the goal of 100-mrem CEDE cannot be
met through routine bioassay, the radiation protection organization should take the
following administrative actions:
-- ensure that adequate control measures are applied to prevent intakes
-- document the adequate control measures for auditing purposes
5-6
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