b. Total Dose Calculations in an Induced Radiation Area.
The nomogram in Figure 6-15 is used for predicting total dose to be received in an induced radiation
area. This nomogram relates total dose, dose rate one hour after the burst, stay time, and entry time.
The two scales at the left show total dose and dose rate at H + 1, as indicated. Two time scales are
positioned under stay time; the left scale is for Soil Types II and IV and the right scale is for Soil Types I
and III. The index scale is a pivoting line which is used as an intermediate step between D and R1 and
Ts and Te. In Figure 6-15, the scale, Soil Types II and IV, under stay time will be used for total dose
calculations if the soil type is not known. If the soil type is known, the appropriate scale under stay time
will be used. It is possible to find any one value on the total dose nomogram if the other three are given,
as illustrated in the example problems.
CM2308
6-34
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