site diminished rapidly after 19 July, as the emphasis shifted to preparing
the devices that were to be used over Japan (1: 38).
4.1.3
Dose Summary for Project TRINITY.
The dose limit for TRINITY participants was 5.0 rem (roentgen equivalent
man) of gamma radiation during a 2-month period (2: 29).
The table below
summarizes the available dosimetry information:
Summary of External Doses for Project TRINITY as of 1 May 1986
Gamma Dose (rem)
Army
Navy
4.2
0-0.5
05-1
1-3
3-5
5-10
10+
103
2
15
0
30
2
10
0
1
0
1
*o
OPERATION CROSSROADS.
Conducted in 1946 at Bikini, CROSSROADS involved approximately 42,000
personnel, 251 ships, and 156 aircraft.
The series consisted of an airdrop
detonated at a height of 520 feet and an underwater shot conducted at a depth
of 90 feet:
Event
Date
Type
ABLE
BAKER
1 July
25 July
Airdrop
Underwater
Yield
(kilotons)
21
21
The nuclear devices were similar to the TRINITY device and to the weapon
detonated over Nagasaki, Japan (3: 17).
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