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U.S. Department of Energy
Office of Scientific and Technical Information

Evaluation of radiological conditions in the vicinity of Hanford, April-June 1963

Technical Report ·
OSTI ID:5874888
Comprehensive surveillance of the occurrence of radioactive materials in air, water, and foodstuffs was continued in the vicinity of the Hanford plant. Gross beta activity in air during the second quarter of 1963 remained at levels persisting since September 1962 with the exception of a temporary small increase in May from increased deposition of world-wide fallout expected each spring. The average concentrations of I/sup 131/ in milk from farms in the neighborhood of the Hanford plant was about 8 picocuries per liter, and the maximum in an individual sample was 84 picocuries per liter. This represents an increase from the first quarter which was probably due to increased grazing on open pasture. Natural background radiation, with some contribution from world-wide fallout continued to be the primary source of environmental exposure for most people in the Hanford environs. Cooling water from the reactors, which is discharged to the Columbia River, continued to be the low level waste with the greatest potential for contributing to the radiation exposure of persons in the plant environs. Locally caught fish continued to be the major source of radioisotopes for the few persons who eat them in quantity. Summing of exposures from various sources in a manner that tends to maximize the total dose to an individual leads to estimates of about 10% of the appropriate NCRP limit for the GI tract, about 15% of the FRC guide for the total body, 30% of the FRC guide for a child's thyroid, and about 30% of the NCRP maximum permissible rate of intake for bone seeking radionuclides.
Research Organization:
General Electric Co., Richland, WA (USA). Hanford Atomic Products Operation
DOE Contract Number:
W-31-109-ENG-52
OSTI ID:
5874888
Report Number(s):
HW-78395
Country of Publication:
United States
Language:
English

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