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HEADQUARTERS
JOINT TASS FORCE SVEN
Sen,
-
APO 187 (HOW), c/o Postraster
San Francisco, Cetitorate
BEST COP’Y AVAILABLE? April 1954
.
an
MEMORANDUM FOR RECORD
SUBTEXT< BRAVO Shot, Operation CASTLE
2.
- PURPCSZ:
To make a matt
_
7 record operational as-
pects that were considered prior to BRAVO event of Operation
CASTLE ard to analyze the resultant situation in light of
available pre-shot and post-shot inforzetion.
26
GENERAL INFORMATION: Operation CASTLE is plenned to
consist of a series of seven detonations at the Pacific rroving
Grounds, which encompasses Eniwetok and Bikini Atolls. S3Ravo
is the code neme that was given the firing of the first device,
SHEEP, at 0645 MW on 1 Merch 1954, off Namu Island, Bikini Atoll.
Subsequent to BRAVO detonation radioactive debris fell
on certain inhabited etolis of the northern harshall Islands.
Radiation intensities rose to levels sufficient to warrant eva-
cuation of four atolls and ell personned were removed from these
-atolls to Ewajalein in accordance with the operational emergency
plan of JIF S=VEN.
are indicated below:
.
ATOLL
Areas evacuated and ganza dosages received
POPULATION DISTANCE FRO DOSES RECEIVED
GROURD_ZsRO
Allinginae
Rongelap
.-
Rongerik
Utirie
17
79
eo 8 (computed)
82
100 WS
100-130 R (computed)
270 Ni
17 B (computed)
22
<1
j§$(185MM
|
40-98 R (film dadge)
(#) 28 Amexhean Service’personnel; 25 USAF Weather Detachment plus 3 USA Signal Corps personnel.
All evacuees are under competent nedical care.
SS. PREVICCS ECPERISNCE AND CHARACTERISTICS OF KUCLE
DETONATIONS: scadioactive debris is an inrerent charecteristie
|
:
of ell noucleer detonations. It originates from fission frequents
adley
hy SinisSize
LCS
ion (cgncelies) ( Gtremtee
‘at
pry
OCP SD
Ceca .
Gena
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