inbet
The goniometric distribution of radiant exposure was measured
at ground ranges of 1,000, 1,400, and 1,900 ft.
‘
.
:
\
.
These measurements
indicate that the maximm therma-radiant exposure would be received on
a 2xn-steradian receiver oriented more nearly vertical than in the air zero
direction.
The smoke screen used in this test shows there is no significant
.
ect upon the blast wave in the precursor or the Mach-front region
_
except to reduce the range over which the precursor extends.
(vu)
The preliminary report of this work was published as ITR-1144;
WI-1312
-
a special report, CRLR 614.
.
DECONTAMINATION AND PROTECTION (U).
Operation REDWING.
J. C. Maloney and M. A. Schmoke, April 1957.
CONFIDENTIAL
aS
(Supersedes ITR-1312).
Investigations were made to study
(1) the contamination characteristics of various types of building surfaces
exposed at various angles and orientations to the fallout from high-yieldnuclear explosions and (2) the effectiveness of various decontamination procedures in order to obtain data on the radiological recovery of military
installations constructed from these materials.
Panels of various construction materials were mounted on board two specifically equipped liberty ships,
which were operated through regions of fallout after Bursts Cherokee, Zuni,
Flathead, Navajo, and Tewa. With the exception of Burst Tewa, the fallout
contamination deposited on the ships from these events was insignificant
with respect to fulfilling the objectives of this project.
The contaminated
Burst Tewa panels were exposed to heavy rainfall prior to receipt for study.
The most heavily contaminated surface, on asphalt and gravel builtup roofing
panel, read approximately 500 mr/hr when received from Burst Zuni at
H + 60 hours.
Contamination levels were generally reduced by factors of
two-to-four by detergent scrubbing of the most heavily contaminated panels.
RG
954
;
ATOM
\