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REPORT DOCUMENTATION PAGE
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AVALABILITY OF REPORT
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unlimited,
N/A since Unclassified
3 PERFORM NG ORGANIZAT ON IEPORT NOMBER(S)
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OPERATION HARDTACK—PROJECT 2.1
Snipboard Radiation from Underwater Bursts, Extracted Version
ef MO
Adee yy
Biyger, M.M.; Rinnert, H.R.; and Zaygorites, H.A.
“sa
TYPE OF REPORT
13b
TIME COVERED
<QOM
‘A
“5
DATE OF REPORT
Year Month, Day)
610324
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P&Ge COUNT
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6 3uFPieMeNTARY MGTanGN This report has had sensitive military information removed in order to
The work was performed by the
provide an unclassified version for unlimited distribution.
i
Defense Nuclear Agency in support of the DoD Nuclear JestPersonnel Review Program
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18
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SUB GRO. P
Hardtack
Underwater Bursts
TB
Gamma Radiation
Radiation Measurements
Radiation Doses
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The principal objectives of this project were: (1) the determination of total gamma-radiation
dose and dose rate histories aboard three moored ships exposed to radiological environments at
locations of possible operational interest about the surface zeros of two underwater nuclear
detonations, shots Wahoo and Umbrella; (2) estimation of remote-source gamma-radiation dose
and dose-rate histories at exposed weather-deck locations aboard ships; (3) estimation of total
gamma-radiation dose and dose-rate histories in the water adjacent to the ships; and (4)
measurement of gamma-jonization decay of a fallout sample collected on one ship a few minutes
after each shot.
Although radiation from the water may have influenced the compartment/deck dose-rate ratios to
a considerable degree at later times, the contribution of contaminated water to the total dose
observed aboard the ships was probably of little significance.
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DSTRBLCT ON
AVAILABILITY OF ABSTRACT
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ABSTRACT SECURITY CLASSIFICATION
UNCLASSIFIED
220 TE_EPRONE (inctude Ares Code)
Mark D. Flohr
OO FORM 1473, 84 \"ak
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(202) 325-7559
BS APR eGiLGN May De wsed UT! exnausted
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SECUR'TY CLASSIFICA ION OF “HIS 24GE
UNCLASSIFIED