Summary of External Doses for Operation UPSHOT-KNOTHOLE as of 1 May 1986
Gamma Dose (rem)
0-0.5
0.5-1
1-3
Army
3,705
3,041
4,459
1,299
20
Navy
402
171
96
87
16
1,125
226
260
45
17
112
205
330
11,611
16
98
28
28
2
0
Air Force
Marine Corps
Civilian DOD
Participants
4.10
3-5
5-10
10+
10
0
OPERATION CASTLE.
CASTLE was conducted at Enewetak and Bikini Atolls during the spring of
1954.
The first event of this series, Shot BRAVO, had a yield of 15 megatons
and was the largest device ever detonated by the U.S. Government as part of
atmospheric nuclear weapons testing.
The following table provides specifics
on this detonation, shown in figure 13 (F), as well as the other five in the
series (13: 1):
Event
BRAVO
1 March
ROMEO
27 March
KOON
7 April
UNION
4.10.1
Date
Type
Surface
15 megatons
Barge
11 megatons
Surface
26 April
Yield
110 kilotons
Barge
6.9 megatons
13.5 megatons
YANKEE
5 May
Barge
NECTAR
14 May
Barge
1.69 megatons
Background and Objectives of Operation CASTLE.
CASTLE was the culmination in the development of the super, or hydrogen,
bomb that began in 1950.
Shot GEORGE, a test in the 1951 GREENHOUSE series,
had demonstrated the initiation of a sustained thermonuclear reaction by use
of a fission reaction.
Fusion, or thermonuclear, reactions had been used in
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