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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New Leakage Model<br />
• Applying inverse square to distance d L from<br />
tube to shielded area,<br />
• and putting a barrier with transmission<br />
exp(–ln(2)x/HVL) between tube & area yields<br />
K L<br />
( x,<br />
kVp)<br />
=<br />
L kVp<br />
1<br />
d<br />
2<br />
d L<br />
2<br />
kVp<br />
(1 −<br />
U<br />
)<br />
W<br />
2<br />
max<br />
I<br />
max<br />
(<br />
kVp<br />
)<br />
B<br />
⎛ − ln(2) x<br />
× exp⎜<br />
⎝ HVL(kVp(<br />
)<br />
housing<br />
⎞<br />
⎟<br />
⎠<br />
B<br />
housing<br />
( kVp<br />
max<br />
(<br />
kVp<br />
)<br />
×<br />
)<br />
32
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