3.2.5 USS BELLE GROVEDose Calculations
Dose calculations for the BELLE GROVE on 1-2 March when BRAVOfallout was
encountered are detailed below. Time periods below deck are indicated by an asterisk
(*).
After 2 March, the daily film badge dose is calculated by multiplying the
integrated intensity topside (Table 2-5) by the time-averaged shielding factor (0.46);
the integrated intensity below is multiplied by the fraction of the day spent below
deck (0.6). Contributions from each source are summed and converted to a film badge
dose. Cumulative film badge doses through 31 May 1954 are given in Table 3-5.
0000-0600*
0600-0830
0830-1030*
1030-1200
0
0
0
0.5
1200-1530*
{530-1700
1700-1800*
1800-2000
2000-2400*
ie)
39.6
0.1
68.5
108.
411.0
647.1
1275.6 (Table 2-5)
1.0
0.1
1.0
0.1
Adjusted
Exposure (mR)
-98
fF S000
Owondws
1 March
Ship Shielding
Factor
=
ome
Integrated
Intensity (mR)
wi
Salon
oF
aly
Day
Time Period
90 50 9 09 ~1 90
g
1145.5 (Table 2-5)
“ererers
4
-K— O- OR Or
516.7
218.9
75.0
168.0
37.7
on
0000-0800*
0800-1200
1200-1330*
1330-1700
1700-1800*
1800-2000
2000-2400*
ao “oO
2 March
a
Nn
Qa
n
—
“I
— On 00 Onn
| March film badge dose = (559.6 mR) (0.7 mrem/mR) = 391.7 mrem (Table 3-5
2 March film badge dose = (507.1 mR) (0.7 mrem/mR) = 355.0 mrem
Cumulative film badge dose through 2 March = 747 mrem (Table 3-5)
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