Peer;
4.7.3
A
+ AR Rm me wy RON Se ning A get ee A ne ne erm et
Operations
In support of TG 7.1 and 7.5 at both Bikini and Eniwetok, check points
were established as required. Main check points utilized at all times at
both atolls were located at the alr dispatcher’s office and the marine land~
ing. All personnel entcring or returning from a radex area were processed
through the check points. An areca was considered as a radex area if the
contamination ¢xceeded 100 mr/hr. Full protective clothing was required
for entry Into a radex area. Limited radex arcas were established when
the contamination level was above 10 mr/hr, but Iess than 100 mr/hr,
Clothing requirements varied with the situation in the Umited radex areas.
An area contaminated to a level Iess than 10 mr/hr was considered non-
radex.
The following is a summary of rad-safe processing:
1.
A total of 1560 parties, containing from 1 to 50 men per party,
were processed through the Eniwetok check points from May 5, 1956, to
July 20, 1956. Approximately 9500 personnel were processed through Bikini
check points during the same period. The personnel decontamination station
at Eniwetok handled a total of 1553 Individuals, while the facility at Bikini
processed 3350.
2. At the equipment decontamination facility at Eniwetok a total of
225 vehicics, ranging from jceps and trailers to larze mobile cranes, were
processed, In addition, all cquipment from three camps was decontaminated,
Six helicopters, contaminated on acrial surveys, were 2lso decontaminated,
At Bikini, approximately i00 vehicles were processed,
The majority of the rad-safe surveys of radex areas at both atolls
were conducted by helicopter, Normal operations included a pre-entry survey with CTG 7.1 at H + 1 to 3 hr, a detailed survey at H + 6 to 8 hr, and
detailed surveys on the morning of D + 1 and 2 days.
Additional surveys
were made as required. Instruments used in the surveys included special
Jordan tonization chambers and standard AN/PDR-39’s converted to read to
500 rfhr.
quired,
Ground surveys of islands in the atolls were conducted when re-
During the entire Eniwetok operational phase, the contamination from
any one shot did not materially interfere with preparations for the next
event, In all events local contamination was quite hieh, with the exception
off
~*shot. Contamination resulting from the
~ shot required
that” the“camps on Rojoa and Teitciripucchi be_closed up,” The (_
_|shots gave significant amounts of alph
_ contamination on
Aoimon.,
t
:
:
Contamination from Bikini shots was such that FEnyu could be used as
- 150%
pietea oe -
a base of opcrations during the entire period. No significant delay in preparations for any shot resulted from contamination found in the atoll area.