3.2.15 USS NICHOLAS Dose Calculations
Dose calculations for the NICHOLAS on 26-27 April, when UNION fallout was
encountered, are detailed below. Time periods below deck are indicated by an asterisk
(*).
For all other days, the daily film badge dose is calculated by multiplying the
integrated intensity topside (Table 2-15) 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 3-15.
Integrated
Day
Time Period
Intensity (mR)
26 April
0000-0600*
0600-1200
1200-1430*
1430-1700
1700-1800*
1800-2000
0
0
32.5
78.5
25.2
50.4
2000-2400*
x
Ship Shieldig
Factor
=
Adjusted
Exposure (mR)
0
0
3.3
78.5
2.5
50.4
0.1
1.0
0.1
1.0
81.0
267.6 (Table 2~15)
0.1
8.1
142.8
26 April film badge dose = (142.8 mR) (0.7 mrem/mR) = 100.0 mrem
27 April
0000-0800*
0800-1200
1200-1330*
1330-1700
1700-1800*
1800-2000
2000-2400*
-
127.2
49.9
17.6
41.4
10.3
19.5
37.0
302.9 (Table 2-15)
0.1
1.0
0.1
1.0
0.1
1.0
0.1
27 April film badge dose = (130.0 mR) (0.7 mrem/mR) = 91 mrem
143
12.7
49.9
1.8
41.4
[.0
19.5
3.7
130.0
: