NCRP-147 Shielding Models 147 Shielding Models - Radiation ...
NCRP-147 Shielding Models 147 Shielding Models - Radiation ...
NCRP-147 Shielding Models 147 Shielding Models - Radiation ...
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<strong>Shielding</strong> Model No. 2<br />
• Ratio of P/T to K(0) is the required transmission<br />
2 2<br />
P / T P d P d W<br />
B<br />
( x<br />
) = = =<br />
norm<br />
K<br />
(0)<br />
1<br />
1<br />
N T UD W T UD<br />
– (again, U is replaced by 1 for secondary barriers)<br />
• Transmission i B is now a function of<br />
– barrier material and thickness<br />
– workload distribution<br />
ib i<br />
– primary or secondary<br />
tot<br />
40
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