TABLE 3.5
COMPUTATION OF DOSE RATE AND ACCUMULATED DOSE 3 FEET ABOVE A
HYPOTHETICAL PLANE CATCHING THE FALLOUT FROM SHOT 5
Column:
1. Local time of reading (track time).
Column:
6. 6 computed instantaneous local dose rate at 3
2. Hours since Shot 5 (Col 1 minus 0600/5/May).
feet elevation in r/hr (8.2 x 107) (Col 4) (Col 5) Appen-
3. Hours since fallout arrival (derived from NRDL
arrival data and based upon the corrected track).
4. Depth of mixing Z in meters.
dix C.
7. Decay coefficient to H + 12 hours (NRDL decay
data).
derived from an average of the local wa readings
(Figure 3.1) after these were first reduced to mr/hr
at H + 12 (Col 7) (Col 6) in r/hr.
5.
$, computed dose rate in situ at time t; this was
8¢
(Figure 2.1 - Figure 2.4), then correcting for apparent instrument contamination, then multiplying by the
factor 1.5 (Appendix B) so as to correct for use of the
instruments when submerged in a 4 pi sourceof fall-
In mr/hr.
64. computed local dose rate at 3 feet elevation
9. @, computed local dose rate at 3 feet elevation
at H+ 1 (22.7) (Col 8) in r/hr.
roughly by applying the radium calibration curves
out material.
8.
10.
11.
Fallout time of arrival, hours after Shot 5.
Computational factor, the accumulated dose
computed on the basis of l r/hr at time H +1. (Based
upon decay data from NRDL).
12. Computed dose at 3 feet elevation accumulated
between fallout arrival and H + 50 = (Col 11) (Col 9).
Note: The numbers in all columns should be roundedoff at two figures.
1
2
3
4
Track
— Hours
Hours
Depth
And
Date
H
Hour
FallOut
Mixing
(Meters)
Time
Since
Since
of
5
-
pt
In
Situ
(mr/hr)
6
Of
@3'
R/hr
7
Decay
Coefficient
to Hel2
8
9
3
Q
@ 4,
R/nr
@ 4,
/
W/hr
10
11
12
Fallout accumu-
Accumulated
Hours:
Since
Fallout to
H+50 Roentgen
Time
H Hour
lated
Dose
Factor
Dose from
May 5 1954
2300
2315
2330
350
24,00
17:0
17:15
17:30
17: 50
18:00
15:00
15:15
15:30
15:50
16.00
35.2
35.8
36.4
37.2
37.6
1.7
24.0
60.0
91.2
83.4
3.38
7.05
17.90
27.80
25.70
1.35
1.37
1.39
1.41
1.42
4.56
9.66
24.88
39.20
36.49
103.7
219.0
566.0
890.0
806.0
2.0
2.0
2.0
2.0
2.0
1.86
1.86
1.86
1.86
1.86
193.00
407.00
1,052.00
1,652.00
1,500.00