Quantcast Table 5.6. Intake Retention Fractions(a) for 239Pu - doe-std-1128-98_ch10142

 

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Methods of Estimating Intake cont'd - doe-std-1128-98_ch10141
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DOE Standard Guide of Good Practices for Occupational Radiological Protection In Plutonium Facilities
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Evaluating 241Am Ingrowth in an In Vivo Count


DOE-STD-1128-98
Table 5.6. Intake Retention Fractions(a) for 239Pu
Class W
Class Y
.
Days Post-
Intake
Lung
Urine
Feces
Lung
Urine
Feces .
1
2.16E-01
2.36E-04
1.05E-01
2.14E-01
1.28E-05
1.27E-01
2
1.78E-01
1.61E-04
1.34E-01
1.81E-01
8.71E-06
1.56E-01
7
1.39E-01
3.29E-05
6.41E-03
1.50E-01
1.69E-06
5.20E-03
14
1.26E-01
2.18E-05
1.23E-03
1.48E-01
1.09E-06
1.73E-04
30
1.03E-01
1.73E-05
9.58E-04
1.45E-01
8.60E-07
1.34E-04
60
7.01E-02
1.34E-05
6.34E-04
1.41E-01
7.15E-07
1.29E-04
90
4.77E-02
1.15E-05
4.21E-04
1.37E-01
6.89E-07
1.23E-04
180
1.50E-02
8.31E-06
1.26E-04
1.25E-01
7.19E-07
1.09E-05
365
1.36E-03
4.84E-06
1.39E-05
1.04E-01
7.97E-07
8.46E-05
730
1.09E-05
2.45E-06
2.50E-06
7.31E-02
8.85E-07
5.14E-05
1825
0.00E+00
1.63E-06
1.63E-06
2.90E-02
8.82E-07
1.19E-05
3650
0.00E+00
1.54E-06
1.54E-06
9.60E-03
7.38E-07
1.36E-06
7300
0.00E+00
1.38E-06
1.38E-06
4.16E-03
6.09E-07
6.15E-07
0.00E+00
1.00E-06
1.00E-06
3.70E-03
4.38E-07
4.39E-07
18250
(a) Calculated using GENMOD Computer Code Version 3.0.3(2), assuming 1-Ám AMAD aerosol.
5.8.2
Alternate Methods of Intake Assessment
Historically, intake as described in the foregoing section was not always calculated
when assessing plutonium exposures. Estimates of uptake using methods similar to
Langham (1956), Healy (1957), or Lawrence (1987) focused on assessing the
magnitude of radioactivity retained in the body, rather than intake (which includes
material not retained and of no dosimetric significance). These methods were (and
are) dosimetrically sound in so far as estimates of deposition and uptake are
concerned, but do not meet the current regulatory requirement of 10 CFR 835 (DOE,
1998a) to calculate intake.
5.8.3
Estimating Effective Dose Equivalent from Intakes of Plutonium
The committed dose equivalent resulting from an intake of plutonium may be
calculated by multiplying the estimated intake (I) by an appropriate dose conversion
factor (DCF):
H50 =
I * DCF
(5.8)
5-32


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