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SUBJECT:
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ole. cal Survoy of Dowwind tc -s C. vaminated by BRAVO ©
8 March ~ 1000 - 1800
Two partics in smll boats surveyed living arcas
9 March ~— 0700 - 1130
Two partics in smll boats mtocecded from the Du
on Rongclap Island and castern half of Rongclap Atoll.
which was stationed outside Utirik Atoll and surveyed
Utirik and fon Islands, the main islands of the Atoll,
9 March ~ 1500 - 1700 Onc party in a small boat landod on tho outer
reef of Bikar Island and survoyed tho island, the only
large island of Bikar Atoll,
10 March ~ 0700 = 1100 Two partics in small boats proccoded from the Di
which was stationed outside Rongcrik Atoll and surve:"
Fniwectak Island (whero the Task Forco's Units had bc
stationed) and the other important islands of tho Ati]
1O March ~ 1430 —- 1980 Two partics in small boats procecded fromthe DI
which was stationed outsido Alinginac toll and surveo,
the inhabited islands of the Atoll,
11 March ~ 0700 = 1400 Onc party ina small boat surveyed the northwesi
ern islands of Rongclap <itoll and one party, rochecke<
the living arcas on Rongelap Island and esthblishcd a
refcrence location for future decay measurements,
12 March ~ 0800
4,
Survoy toam arrived Mniwctok iitoll via DDE,
The following pcrsonncl from tcst projccts in TG 7.1, TU 13, scrved as
members of the survey tcam:
Herbert Scoville, Jr,
Richard Rast
TU-~13 Staff
Project 2,1
Yalmer Strope
Project 6.4
Richard Soule
Project 2.5a
The USS NICHOLAS (DDE 449) suppliod boat crows under the dircction of LT Cliffox
Frink, Executive Officcr, for surveys.
5.
Instrumntation
SAN BRUNO FRC
Radiac sect AN/PDR-39 was sclectcd as the instrument to be used in the
conduct ef the survey,
Fivo (5) cach of AN/PDR-39 were calibrated with an 80
Curie Co™
source twenty-four hours before departure. The calibration yicldcd =
zcro variation between instrummts - any scale. Upon cross checking three of
+hoese instruments, (a point of actual survey) in a radiation ficld of 0.320 rf.
it was found that all three instruncnts gave the same reading.
These survey meters wore subject to prolonged
tions of dampness (to the point of sca wator splashing
and continual rough handling. With ono cxecption, all
efficiently for the duration of the operation. On the
use under adverse condi—
over thom), salt dcposit
instrumnts opcratcd
final day it was found