Table 1.
A comparison of the three calculational models: infinite
exposure (IE), estimated exposure (EE), and effective biological exposure
(EBE).
Results are expressed as reduction factors compared to an.
infinite exposure of 1.0 at all times of arrival.
Time of
EE
Shielding x Weathering® xX Time =
x
Repair = EBE
arrival, hr
1
2
3
4
6
8
10
12
14
16
18
20
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.75
0.83
0.81
0.79
0.78
0.76
0.75
0.73
0.72
0.71
0.71
0.70
0.69
0.95
0.94
0.94
0.93
0.93
0.92
0.91
0.91
0.91
0.90
0.90
0.90
0.59
0.57
0.56
0.54
0.53
0.51
0.50
0.49
0.49
0.48
0.47
0.47
0.84
0.81
0.79
0.79
0.78
0.76
0.76
0.75
0.74
0.73
0.73
0.73
0.50
0.46
0.44
0.43
0.41
0.39
0.38
0.37
0.36
0.35
0.35
0.34
auWeathering" includes the effects of variation from p72 in decay
rate of the external exposure rate and the variation in shielding or
"ground roughness" effects as fallout weathers into the soil.
calculations are based upon an empirical model.
OThe effect of integrating for one yr instead of infinite time.
222
The