Radiation intensity above the road was found to depend on
the disposition of the contaminant removed from the road surface.
ressure water-hosing was found to be the most rapid and effective
rocedure tested. Dry sweeping, requiring the least manpower, was
High-
initially effective but resulted in suspension of contaminant in the air
above the cleared surface, so that recontamination occurred.
None of
the
of
contamination
significant
in
resulted
procedures
the tested
operator's protective clothing.
wr-400
-
DECONTAMINATION OF CONSTRUCTION MATERIALS.
Operation BUSTER-JANGLE, (Chapter 7).
E. H. Dhein, June 1952.
SECRET-RESTRICTED DATA
we
Test panels of representative standard construction materials
were exposed,
in positions corresponding to their normal use, to the effects
of surface and underground atomic blasts 7,060 ft distant.
All materials
were tested with and without various protective coatings.
Supplementary
panels were prepared for the underground shot, and positioned with slopes
ranging from horizontal to vertical, half of each panel being coated with
oil.
The effectiveness of various decontamination procedures was tested
by measurement of the original and residual contaminations.
The results of these tests require cautious appraisal because of
the possible removal and/or redisposition of contaminant by the rain, snow,
and high winds that followed the surface shot.
However, definite indication
was given that the precise nature of a protective coating does not significantly affect contexinability decontaminability characteristics except insofar
as it changes tze smoothness, hardness, or continuity of surface of the
test material.
Contamination of wall surfaces was negligible as compared
with that of rcof surfaces, the degree of contamination appearing to vary
inversely with the slope of the surface.
Pre-exposure treatment of a
surface with an oil film tends to protect the surface and to facilitate
decontamination. © Vacuuming is relatively ineffective as a decontamination
process, but high-pressure hosing with a detergent solution is very
effective.
wr-400
-
TEST OF MATERIALS.
Operation BUSTER-JANGLE, (Chapter 9).
Gerala Smith, June 1952.
SECRE=-RESTRICTED DATA
prat
Described herein is an investigation of the possible relationship between the radiological contamination-decontamination characteristics
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