for a specific badge, the exposure of the film badge during the period it was in the
mess hall (H+28.75 to H+35.25) must be added to the calculated film badge dose as of
H+28.75 hours. This "mess hall dose" is approximately 12 rem.
From the personnel interviews it is possible to calculate the H+28.75 film badge
dose for two of the film badges whose readings are given in Table 2 (badge #311 and
#312). In addition, it is possible to calculate the H+28.75 hour dose for the badge that
was hung on the tent post in the Army area (badge #314).
Table 3 compares the
calculated film badge dose at H+35.25 hours (the calculated dose at H+28.75 hours plus
the "mess hall dose") and the corresponding film badge reading (from Table 2) for these
three film badges.
The activity scenarios or protection factors pertinent to the other
badges are insufficiently known to permit meaningful comparisons.
Table 3. Comparison of dosimetry results with doses calculated to film badges.
Film
Calculated Dose
(QH+28.75 hrs
Calculated Dose
(QH+35.25 hrs
Film Badge
Badge
CN
Reading (Table 2)
Ratio
311
416
32 rem
44 rem
40 rem
1.10
312
4ii
38
50
uu
1.14
314
N/A
100
112
98
1.14
From Table 3, the calculated dose to a specific film badge at H+35.25 hours is
approximately
10-14
percent higher
than
the actual film badge reading.
This
difference between the calculated doses and the film badge readings could easily be
accounted for in the uncertainties associated with defining the free-field radiation
environment and protection factors on Rongerik. Thus, the estimated doses in Table 1
-are conservatively reduced by 10 percent in order to be consistent with the dosimetry
results. This adjustment in the Table 1 doses yields the best estimates of film badge
doses received by the personnel on Rongerik. Results are presented in Section 5.
15