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A cin
C. L. Dunhan, M. D., Director
July 29, 1957
Division of Biology and Medicine
Gordon M. Dunning, Health Physicist
Division of Biology and Medicine
GAMMA RESURVEY OF RONGELAP ISLAND
I thought you would be interested in the resurvey made of Rongelap
Island at our request prior to the return of the Rongelapese. The
attached memorandum and maps summarize these data. You will note
the average gamma dose rate was about 0.03 or/hr (0.26 r per year)
at the time of the measurement on June 25, 1957. This substantiates
our prediction wdde to the Commission last winter that "It is difficult to extrapolate precisely far into the future, but,the date
suggests that the gamma dosea on Rengelap Ialand
greatly
exceed (if at all) 0.5 reentgens for the first year of reocoupancy
Enclosures: (6)
1. Memo to Gordon M. Dunning fr Ernest Wynkoop
dtd 6/27/57 subj Gamma Radiological Survey of
cc:
OFFICE
Rongelap and Aneaetok Islands
5 Maps
Dr. Western
- po
SURNAME p>
_DATE p
Form AEC:318 (Rev.
Refs7
9-83)
3 002161
U. &
COVERNMENT PRIRTING OFFICE
16-—-62761-3
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