Method of Estimating Infinity Doses to the Lungs
Step 1.
Calculate the dose rate for 1.0 uc/M? - hour
(A.
For each one wo/¥3 activity present in the air per hour,
(0.83) (0.25) =
0.21 pc of activity are initially retained. (Based
on an assumed intake of 20 cubic meters of air per
2); hours)
B.
The initial dose rate to the lungs will be:
~-
(0.22) (uc) (1.3 x 108) (6/nrsic) (0.4) (Mev) (1.6 x 106) (ergs/Mev) =
100 (ergs/gm-rad) (1000) (grams)
-~
1.7 x 1074 rads/hour
Step 2.
Calculate the "infinity" dose to
a7
+
where: At
Be Dog 25 Ay t
t
the lungs.
dose rate at time of deposition "+t"
after detonation (hours)
= time after detonation that deposition
occurs.
infinity dose (rads)
It
ew)
(5)
Crh
(8.5 x10
1074) (+)
Pol
ack
yt
(0.35)
fas
.o)
i
(+) rads
mrads {rer 1,0 uc/m3hour).
acayoo
are:
*fen?y
(OUTS
nso
Be
i
wf
i
et
i
(0.6L) (t) (ue/M) (hours of
inhalation}
mrads (10 M3/16 hours)
re
- 38 -
vy
u
(uc/M3) (hours of inhalation) mrads (10 13/8 hour s)
oO
oO
td
Doo