The following problems are concerned with techniques only and do not
consider the impact that these doses or dose rates might have on operations
in a contaminated area.
Example Problem 1.
Troops must cross the fallout area, shown in Figure. 5-4, at
H + 3 in M113 Armored Personnel Carriers at a rate of speed of
10 kilometers per hour (kmph).
The route from A to B, a
distance of 5 kilometers (km), will be used.
Total dose that will be received by troops.
1. Calculate the average dose rate. Ravg = 1/2
Rmax = 1/2 (300 cGyph) = 150 cGyph (at H + 1).
Normalize Ravg to H + 1.
Ravg is already at H + 1.
Calculate the time of stay.
Find the outside dose, using Figure 5-2 on page 5-12.
Ravg = 150 cGyph
Te = H + 3 hours.
= 0.5 hour
D = 18 cGy.
Calculate the inside dose.
TF = 0.3 (Figure 5-3 on page 5-16).
ID = OD x TF = 18 x 0.3 = 5.4 cGy.