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.

GIVEN:

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.

FIND:

Total dose that will be received by troops.

SOLUTION:

1. Calculate the average dose rate. Ravg = 1/2

Rmax = 1/2 (300 cGyph) = 150 cGyph (at H + 1).

2.

Normalize Ravg to H + 1.

Ravg is already at H + 1.

3.

Calculate the time of stay.

4.

Find the outside dose, using Figure 5-2 on page 5-12.

Ravg = 150 cGyph

Te = H + 3 hours.

Ts

= 0.5 hour

D = 18 cGy.

5.

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.

ANSWER:

5.4 cGy.