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indicate the obvious fallaey of accerting a 10-roentgen infinity dose based
on garce dose rates measured on personnel eutside the radiation field.
For
exanple, the natives froz Ailinginas showed personnel] dose rate readings
that would approrimate nine roentgens (gems) in 2} days and yet skin damage
to some degree vas evident in 24 out of 16 of the personel.
On the ether
hand, the natives from Utirik showed no akin damage with an estinated 2.2
roentgens in 2} days based on gazza dose rates neasured on personnal, The
uncertainty of these data was discussed under Policy II.
They do suggest,
however, that if the contamination of a relatively large area of the exposed
body produces less than one roentgen infinite gemna dose as measured by a
survey meter held four inches from the surface there 1s a large probability
that beta burns will not result.
z
(See also discussion under Policy II.)
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8
When the sane doze rate reading is produced at a given height above a
surface from a smaller area, the amount of oontanination per mit area is
grester {other factora being equal). Therefore, it would seen desirable
to reduce the recommended dose rate levels when relatively small areas are
involved,
It is recognised that radiation from another nearby spot uuy con-
tribute to the survey meter reading vhen monitoring a suall area on personnel,
but this bas not been taken into aseount, first because of the ciffisulty of
establishing @ prior appraisal ef this variable factor and, second, vbatever
this contribution may be it will now become an adied safety factor.
Of course, the problex is still complex because when considering
enaller and sraller areas the sventual end point is a single particle.
ra NM
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