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Page Title:
Table 6.9. Neutron Yields for Trace Impurities in Plutonium and Uranium |
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| 0182im.jpg) DOE-STD-1128-98
Guide of Good Practices for Occupational Radiological Protection in Plutonium Facilities
Average Neutron
Neutron Yield
Neutron Yield
Energy in MeV
per 106 Alphas
per 106Alphas
for 5.2-MeV
at 4.7 MeV (234U)
at 5.2 MeV (239Pu)
Element
Alphas from Pu
Li
0.16 0.04
1.13 0.25
0.3
Be
44. 4
65. 5
4.2
B
12.4 0.6
17.5 0.4
2.9
C
0.051 0.002
0.078 0.004
4.4
O
0.040 0.001
0.059 0.002
1.9
F
3.1 0.3
5.9 0.6
1.2
Na
0.5 0.5
1.1 0.5
Mg
0.42 0.03
0.89 0.02
2.7
Al
0.13 0.01
0.41 0.01
1.0
Si
0.028 0.002
0.076 0.003
1.2
Cl
0.01 0.01
0.07 0.04
The quality factors to be used for determining dose equivalent in rem for neutrons
are as follows:
Neutron Energy
Quality Factor
# 10 keV
3
> 10 keV
10
When the spectral data are sufficient to identify the energy of the neutrons, the
following mean quality factor values may be used:
6-18
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