a
on the ship's deck resulting from contaminants in the air surrounding
the ship; and Residual free field ~ the radiation field on the ship's
deck resulting from contaminants on the ship's weather surfaces.
The relative contributions by the various sources were compared
both in a region which was washed down ani in a region which was unwashed,
It was noted that on the deck of a washdown protected ship the air contribution was 99 percent of the total dose rate and 80 percent of the
total dose at the time of maximum
fallout, and 25 percent of the total
dose at the time that the fallout stopred.
The water contribution was
virtually insignificant, the dose accumulated was 400 mr up to the time
that the YAG-40 left the area,
Interaction cf Gamna Radiation with Steel
Gamma fields inside steel cylinders of various thicknesses were
compared as a function of cylinder thickness anid time.
Least square
straight lines were drawn for the plots on semilog paper.
The slopes
Q
coeffi
pote
of thesa lines determine combined absorption ani multiple scattering
ants (A).
The indications are that the BAER¢201) data
were Significantly different from the Castle data.
Instrumentation
errors cannot account for all ge Dpis difference, leading one to suspect
we
that for later times +eley= energy spectrum contained a
reater:-
percentage
(Romeo),
be
an
ev
high energies than 3 sas the case at Castle |
g
&
otk
y (Union), and
*
CONCLUSTONS
ae *
MW
~
Yankee).
<
ieee
For surface detonations
the relative dosage
contribution from the contaminated water apreared to be insignificant.
The dosage contributed by the contaminated air surrounding a washiown
protected ship accounted for most of the dosage which would be received
‘ae cit
Pos
ocr
a
“
~
51
-
aa!
2”
: