addition, numerous pieces of small equipment were cleaned up for the various
projects and for H&N. Normal procedure called for all heavy equipment returning from shot {slands to be monitored on removal from boats at the boat
landing and directed to the decontamination station if necessary. Versene
and citric acid were the common decontami!nating agents employed, and a
steam generator was used to provide hot solutions for the necessary washing.
When equipment was not needed immediately, the vehicles were held in a
thot" parking lut for varying lengthe of time before decontamination in order
to reduce contamination levels by radioactive decay of the contaminants,
2.1.3-—The Piotting and Briefing Section was responsible for the conduct
of all radiological surveys on the atoll, the majority of which were made by
helicopter. Normal operations Included a pze-entry survey with CTG 7.1 at
H+1 to H+3 hr, a detailed survey of the cntire atoll at H+4 to H+8 hr, and
detailed surveys on the mornings of D+l and D+2 days. Additional surveys
were made as required. The basic instrvment used in the aerial surveys
was a special fonization chamber built by J- dan Electronics, Inc., to the
desired specifications. Some AN/PDR-S9 survey meters converted to read
500 r/hr were also used. When necessary, data were radioed back to the
Rad-Safe Center from the survey helicopter. Plotting and briefing stations
were maintained in the Rad-Safe Center and the J-3 office.
of islands in the atoll were conducted when required.
Ground surveys
2.1.4-—Monitors for recovery parties were provided by TU-7 when
necessary. The demand was quite small. Normally, no more than two or
three were furnished after any one shot. ‘ general, projects provided their
own monitors as members of the recovery parties. Monitors were responsible to party leaders, who were expected to accept a monitor's advice and
plan their operations accordingly.
2.1.5— Laboratory facilities for radiochemistry work at Eniwetok Atoll
were obtained from the Army Signal Corps. One radiochemistry trailer,
AN/MDQ-1, was perked rear the Rad-Safe Building and used for all sample
preparation and counting. The work load of the Laboratory Section at Eniwetok was quite small. Approximately 100 samples of lagoon water were
processed after the MOHAWK, APACHE & HURON
devices were fired. In
addition, several tritium urine analyses were performed. Because of alpha
contamination after the
YUMA
and the KICKAPOO
shots, a certain amount of alpha-counting was necessary. Raln-water samples were col-
lected and counted periodically for gross beta-gamma activity or total alpha
activity. Chemical analysis was not required.
2.2
Shots and Survey Results
During the entire Eniwetok operational phase, the contamination from
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ee anne weenesert