Actions for CONTROL STUDIES PERFORMED IN THE UNITED STATES AND AT ENIWETOK. PARTS I, II, IV, AND VI. ANNEX 2.2 OF SCIENTIFIC DIRECTOR'S REPORT OF ATOMIC WEAPON TESTS AT ENIWETOK, 1951

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CONTROL STUDIES PERFORMED IN THE UNITED STATES AND AT ENIWETOK. PARTS I, II, IV, AND VI. ANNEX 2.2 OF SCIENTIFIC DIRECTOR'S REPORT OF ATOMIC WEAPON TESTS AT ENIWETOK, 1951

Published
United States : [publisher not identified], 1951.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1951.
Physical Description
microopaque : positive ; 8 x 13 cm

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Summary
A high degree of correlation was found between the thymic weight loss in mice and the dosage of x radiation over the range of 75 to 900 r. Splenic weight loss proved satisfactory as a biological indicator over the range of 150 to 600 r. The response of mice splenic and thymic net weight to the mixed radiation in a thermal neutron columm was found to be qualitatively the same as that seen following exposure to x radiation. The relationship of chromosome breakage frequency to radiation dose in the flowering plant Tradescantia (spiderwort) was determined for three experiments designed to simulate anticipated field conditions for atomic explosions. Studies are reported which were made to provide control x-ray dose-mortality data for comparison with field montality data obtained from mice exposed to atomic bomb nuclear radiations. Mean survival times and the pattern of deaths as a function of dose and time are presented and discussed. Lethal dose curves established for 110 to 160 lb swine exposed to 2,000 kvp total-body x radiaation at 2 m indicate that bilateral (one- half the total dose to each lateral aspect) irradiation is more lethal than unilateral (total dose to one lateral aspect) irradiation. The dependence of dose distribution on method of x radiation and wave length, the importance of uniform dose distribution, and the difficulties encountered in obtaining uniform dose distribution in a subject 28 cm thick are discussed. From a study of the effects of exposure of swine to tropical conditions for a period of several hours in metal containers similar to those used for exposure during Operation Greenhouse it was concluded that the confinement did not affect significantly the response of the animals to irradiation. Lethal dosage determinations and pathological effects of various doses of bilateral total-body x irradiation on dogs are reported. Data indicate that confinement of dogs for several hours in Ai cages under conditions slmilar to those used at Operation Greenhouse did not affect significantly the response of the animals to irradiation. (C.H.)
Report Numbers
WT-18
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
NSA number: NSA-16-011357
OSTI Identifier 4808790
Research organization: Los Alamos Scientific Lab., N. Mex.
Research organization: Naval Medical Research Inst., Bethesda, Md.
Research organization: Naval Radiological Defense Lab., San Francisco.
Research organization: Oak Ridge National Lab., Tenn.
View MARC record | catkey: 42521714