xv. (QA weapous TEST REPORTS.
WI's and ITR's.
Wr-19
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EVALUATION OF FILTER MATERIAL.
Operation GREENHOUSE.
Elmer H. Engquist, July 1951.
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SECRET-RESTRICTED DATA
= Four types of Chemical Corps filter material and one type of Air
orce air-sampling filter material were tested in sampling runs through
radioactive clouds resulting from the air bursts of 3 atomic bombs of
varying kiloton equivalents.
Two or three passes were made through each of
the atomic clouds by drone airplanes, at levels between 16,000 ft and
30,000 ft, within the first quarter hour following each detonation. A
specially designed probe extended from the nose of each aircraft through
which contaminated air was introduced into a closed duct.
The air was
exhausted from the duct through five test filters at a uniform flow
equivalent to 32 liter/min at atmospheric pressure.
Results of the tests indicate that the high radioactivity associated
with particulate ratter of the clouds has no effect on the filtration
properties of the various filter materials.
The mean efficiency of Chemical
Corps types 6, 7 and 8 respiratory-protective, filter material was 99.7% to
99.8% against the gross particulate contaminant existing in an atomic bomb
cloud 3 to 4 min efter detonation.
Under the same circumstances, the mean
efficiency of Cherical Corps type 5 material was 84.1%, and that of Air
Force polystyrene filter material was 74.34%.
WT-27
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CONTAMIVATION-DECONTAMINATION STUDIES ALOFT.
S. R. Sinnreich, M. G. Gordon, and G. E. Fulmer, January 1953.
SECRET
(u)
wr-42
This report appeared as CRLR 104, 2 January 1953,
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EVALUATION OF COLLECTIVE PROTECTOR EQUIPMENT.
Operaticn GREENHOUSE.
Frank G. Ort and Merton D. Mears, March 1952.
SECRET-FESTRICTED DATA
To assay Chemical Corps collective-protector equipment under
conditions of an atomic detonation, a reinforced-concrete-protected shelter
was constructed 1,710 ft from ground zero of the tower burst of an approximate
50-KT bomb. A positive pressure of filtered air was maintained within the
shelter by means of a collective protector.
Antiblast closures were in-
stalled at the shelter inlet and exhaust pipes, both to prevent rupture of
the filter materiel and to avoid a dangerous pressure buildup within the
structure.
GY A
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A