Problem 5.
GIVEN:
Monitoring data from a
unit
occupying
foxholes
in
an
induced radiation area:
Time
Ground Dose Rate
(hours after burst)
(cGyph)
H
+
1
40
H
+
5
23
H
+
6
17
H
+
7
15
FIND:
Soil Type in which decay approximates the data.
SOLUTION:
Connect 40 cGyph on the R1 scale and 23 cGyph on the Rt
scale.
Holding the hairline firmly at its point of
intersection with the index scale, align equal values on
the left and right reference lines. Check the intersection
of the hairline with each of the four soil types to
determine which is closest to H + 5; repeat this procedure,
with the dose rate at H + 6 and H + 7.
A review of the
results will indicate that the decay of contamination from
Soil Type IV (Figure 5-9) approximates the data given.
ANSWER:
Soil Type IV.
CM5206
5-28
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