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HEADQUARTERS
JOINT tase FORCE Sivan
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APO 187 (HOw), c/o Postmaster
San Francisco, Celitornia
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een \
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oor 74
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iz April 1954
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MENOCANDTR FOR REC OXD
ae
SUBJECTS
1.
BRAVO Shot,
- PURPCSE:
Srem sies
ee
ASS
eration CASTLE
To make @ Reve
T 3,ecord operational age
pects that were considered prior to BRAVO event of Operation
2.
GENERAL INTORLATION:
See vege weet
CASTLE and to analyze the resultant situation in light of
available pre-shot and post-shot inforzetion.
Operation CASTLE is pleaned to
ld
consist of a series of seven detonations at the Pecifie rroving
‘ee peed. pare ecrrery Te
onwene!
Grounds, which encompasses Eniwetok end Sikini Atells. B324YV0
is the code nene that was given the firing of the first device,
SHRILP, at 0645 Mon 1 March 1954, off Namu Island, Bikini atoll.
Subsequent to BRAVO detonation radioactive debris fell
on certain inhabited atolls of the nerthern LMiarsheli Islands.
Reaciation intensities rose to levals sufficient to wasrent evacuetion of four atolis end ell persanned were removed from these
-atolls to Evajelein in accordance with tha operational emergency
Plen of JTF SEVEN.
are indiceted below:
Areas evacuated and gamza dosages received
ATOT,
PORULATION DISTANCE FROI DOSES RECEIVED
a GROURD ZERO
Adlingtoae
7
79 BE
80 R (computed)
°" Rongelep |; ag
100 HK -100~150 B (computed)
_. RBongeri
a ae
1S3 NK
40-98 B (42m badge)
<= |
Utirik
a 154 B70 ML
17 B (computed)
(#7) 28 ameriean Service’‘personne; 25 USAP Weather Detachment plus 3 USA Sisnel Corps personnel.
All evacuees are under competent medical care.
S.
PREVIOUS EXFERTENCZ AND CHARACTERISTICS OF NOCLEAR
DETONATIONS:
scedioactive debris 19 en incerent crsrecteristie
of ell nucleer detonations.
It originates from fission fragments
ation (Cancelled) (StenOa) pie
ears hh
yadicy
TOO ameenioe
N
7
q
4
1
genset—~—"3
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