Oyo.
mended that eonsideration be given to erscustion when the game dose rate
reading st three feet vas, for example, about 6.2 r/br at BY3 hours.
Roughly, this would correspond to about 460 repa/hr of beta at 20 oenti~
‘peters, Of course, this activity deeays and also it is presumed that
personnel would be sent indoors, st least for a few hours. On the ether
hand, it strongly suggests that biologically significant doses may be
delivered to the feet if not protected, Skin lesions were frequent on ths
bare fest of the natives evacusted during CASTLE.
This probably vas
a
eombinstion of beta dose from material on the ground end from thet scuffed
up over the bere fest and then elinging to the skin, (Ko lesions were
sooner,thonothSeredebeten fotSAeoteeateen
It would be expected thet normal
elosed-type footwear (as compared to
open sandals) would afford adequate protection to the fest from such high
beta doses as discussed here. There is still no guarantees that beta
radiation from material on the ground will not deliver significant
biclogical doses to the ankles and perhaps lover legs, after personnel
are released fron staying indoors.
For eaxanple, if the beta dose at 10
centineters above the ground is 460 reps/hr at E43 hours, it wuld be
about 190 repshr three hours later and 120 reps/hr six hours later.
One further possibility {3 the accurmlation of radioactive material
around the ankles and lover legs resulting from norzal walking about the
area.
This is discussed under Folicy III.
pn
bie J
or
AS
Ax