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‘K UNIT7 - J, D, Servis, Maj, USA
IOLOGICA
A
(J. D. Servis)
MP 22-s0t0 Survey Summary
A partiel Rad-Safe survey was conducted on
day with incomplete atoll results.
Results of this survey
Table TU-7-2), indicated no extensive recontamination of
rhe atoll except within the Bokobyaadaa - Wamu chain.
An
oreseen fallout of radioactive material less than 5
sicrons in size did occur on the night of R4+1.
3
This fali-
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“ut covered the atoll and raised radiation levels by apcroximately 100 mr/hr.
Because of the late period of fall-
“mut this radiation level would have corresponded to 3.5 r/hr
llout at H¢#2 hours,
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This fallout, because of small
‘marticle size, wes much more difficult to decontaminate than
ang
"che macroscopic particles of
Becondary fall out levelled off between 0700~0800,
Residual top-side levels on ships were:
Ainsworth -
ur/hr, Estes - 12 mr/hr, and Beiroko ~- 30 mr/hr, Naximun
2tvels were 20 mr/hr to 45 mr/hr.
_
te
/
«#
.
Lagoon contamination covered the western quarter
et the lagoon with levels comparable to that of aa Lagoon
z*. Telughing through the southwest passage materially increased
S<-sAekground radiation levels in the vicinity of Ourukeen,
i-vdkoaetokutoku, and Bokororyurnu.
BEST AVAILABLE COPY
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CTP tirte TR
7 442.
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