The efficienay of a surface for sollesting and holding the fallout
material is important.
It is not surprising thatthe highest dose rate
readings as well as biolegical effeets vere noted om the hair of the natives
and also on parts of the exposed body where perspiration was present.
Further, it was observed that even one layer of light sotton material vas
suffieient to pretect against beta skin damage in moct eases,
This waz
due probahly not to the relatively emall attenuation of the betas by the
elothing but rether te the physieal situation of helding the radioactive
material at some distance from the skin, whieh effect would be relatively large.
an added consideration is the pessibility of high beta doses
delivered to personnel from the falout material lying an the ground and
other surfaces.
this
If the highest degree of contamination -snsidered under
policy is save when in direct eontaet with the skin, then the beta
dose from an equally contaminated ground will not be hezardous.
(See
Policy II] for diseussion on unequal contacination on persemel.)
Hovever,
it fs true that the eontanination may exceed the amount te deliver dose
rates given in table {I and yet not be great enough to consider evacuation.
some personnel may mot go indoors anc those who did vill. evantunldy be
released fron this restrictive action and “nen may walk around in a
relatively highly conteminate’ area.
Because of the sore limited range |
of the beta, the location ef createst concern is the lover legs.
One report estimates a beta to gueza dose ratc ratio of about 75
to 1 at 10 centimeters above the ground.™
“ TTR923.
study of
=~
Response ¢
5
aT)
OD
Under Poliey I it was recom
ac Gel,
‘
.
a
s
ad
A
Teliout Cronkite, E. P., ot al. Kay 1954.
ied
**AD-95(H) the
celative
lasrd
Gomme
Fission
1949
(UNCLASSIFIED:
Condit, R.I., Dyson, J.3. and Lamb, W.4.5. MRDL