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410474
CLASSIFICATION CANCELLED
BY
AUTHORITY OF DOE/O
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COMDR
SUBJECT: Aircraft Decontamination
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le Tois letter refers to your message DMGENTNI 4849 and our
sage, date time group 2421102, Attached is the final report of the
ear Applications Division, Task Group 7.4, on aireraft decontant
nation during Operation CAITLE,
,
DP&A
D/O
D/M
2.
In view of the necessity for early release of aircraft to minten-
activities, decontamination was an operational project rather than
ntifie, The methods used were the results of experience gained on past
test operations and are believed to be the best suited for the needs of
COMBE
:
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.
PER SEC
Group Tehe
| Je It was found that successive washings, in some cases, reduced
radiation intensities, hovever, more than two washings did not prove
Other (Placeprefitable, Citrie acid was used in some instances for decontamination of
office symboB-8% aircraft but did not speed up the decontamination process, ‘this
& initial): method vas used primarily as @ sample collection program as the oltric
aided in later chenical analysis. ‘the nost effective decontamination
attained through allowing tine for decay and the use of scrub brushes
with a detergent soap and gunk.
4
It was necessary to use a large number of personnel for washing
aircraft in order to stay within the established peacetime tolerances,
—
Her tactical ooditionsa tha maximum: tolerance will undoubtedly be higher
ting in a reduction of the number of required personnel.
5.
During the operation there was concern regarding the relative
“hance of Beta radiation which were being absorbed on the hands of main1 vorking on contaminated aircraft. Since the Tesk Group
trumentation was limited, the scientific personnel vere asked to take
a
TC Teh
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“hh 5
Tee.
tile
of Beta measuresents on the surface of contaminated aircraft and
in the engine nacelles, They utilised a "Juno" survey instrument and
e reading showed the ratio of Beta to Gasma to te ten to one. Since the
personnel were not to receive greater than lOr whole body radiation, it
Waa safe to assume that the Beta radiation absorbed by the hands would not.
se as file eyceed 100 repa. This 19 of small sipnificance since 590 reps are required
copy only
tg produce any skin changes,
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