Radiation Exposures at Project TRINITY

Dosimetry information is available for about 815 individuals who
either participated in Project TRINITY activities or visited the test
site between 16 July 1945 and 1 January 1947. The listing does not
indicate the precise military or unit affiliation of all personnel.
Less than six percent of the Project TRINITY participants received
exposures greater than 2 roentgens. Twenty-three of these
individuals received exposures greater than 2 but less than 4
roentgens; another 22 individuals received between 4 and 15 roentgens.



PREFACE


From 1945 to 1962, the U.S. Government, through the Manhattan Engineer
District (MED) and its successor agency, the Atomic Energy Commission
(AEC), conducted 235 tests of nuclear devices at sites in the United
States and in the Atlantic and Pacific Oceans. In all, an estimated
220,000 Department of Defense (DOD)* participants, both military and
civilian, were present at the tests. Project TRINITY, the war-time
effort to test-fire a nuclear explosive device, was the first
atmospheric nuclear weapons test.

* The MED, which was part of the Army Corps of Engineers, administered
the U.S. nuclear testing program until the AEC came into existence in
1946. Before DOD was established in 1947, the Army Corps of Engineers
was under the War Department.