DNA 1240H-2
ahR
SF = —— .
@3R
a hep
——
E
ahR
- a “3R
(17-21)
-_
* | - do
where d, >» do, and dip are defined in Eqs. 1716,17-18, & 17-21, and
d3p, the dose rate at a point 3 ft above the finite slab, may be
expressed:
R
-(ux)!
aap = dp
oe av
(r/nr)
he
oO
(17-22)
-2
It ie apparent that, when Eqs. 17-l6to17-19, 17-21 and17-22 are used,
the dose-rate ratios have the following equivalences:
~
a -
)
pe” (Hx)
°
av
(cm)
Unxe
oO
R_
pe? (Hx) ' av
\
tax?
dhr
ane. FS
Peed ee (ux)
J
lnxe
—
(17-23)
av
°o
R
at
do
ste|
° bnx®
he= -3
(cm)
"
y,
Reference 54
presents curves of the quantities needed to find the
shielding factors for various h and R values. Note that Reference 54
uses the following symbols:
PY
BEST AVAILABLE CO
17-40
ee