State background-radiation levels: results of measurements taken during 1975-1979
State background-radiation levels: results of measurements taken during 1975-1979
Background radiation levels across the United States have been measured by the Off-Site Pollutant Measurements Group of the Health and Safety Research Division at Oak Ridge National Laboratory (ORNL). These measurements have been conducted as part of the ORNL program of radiological surveillance at inactive uranium mills and sites formerly utilized during Manhattan Engineer District and early Atomic Energy Commission projects. The measurements included determination of /sup 226/Ra, /sup 232/Th, and /sup 238/U concentrations in surface soil samples and measurement of external gamma-ray exposure rates at 1 m above the ground surface at the location of soil sampling. This information is being utilized for comparative purposes to determine the extent of contamination present at the survey sites and surrounding off-site areas. The sampling program to date has provided background information at 356 locations in 33 states. External gamma-ray exposure rates were found to range from less than 1 to 34 ..mu..R/h, with an US average of 8.5 ..mu..R/h. The nationwide average concentrations of /sup 226/Ra, /sup 232/Th, and /sup 238/U in surface soil were determined to be 1.1, 0.98, and 1.0 pCi/g, respectively.
- University of North Texas United States
Michigan, Radiation Doses, New Mexico, California, Isotopes, Utah, Background Radiation, Uranium Isotopes, Mid-Atlantic Region, Data, Gamma Radiation, New Jersey, Electromagnetic Radiation, Actinide Isotopes, Arizona, 053000 -- Nuclear Fuels-- Environmental Aspects, Pacific Northwest Region, Kansas, 11 Nuclear Fuel Cycle And Fuel Materials, Radioactivity, Florida, Alabama, Great Lakes Region, Even-Even Nuclei, Georgia, Colorado, Monitoring, Actinide Nuclei, Kentucky, Thorium Isotopes, Southwest Region, Radiation Monitoring, Abandoned Sites, North Carolina, 54 Environmental Sciences, Usa, Ohio, Radioisotopes, Missouri, Alpha Decay Radioisotopes, Virginia, Pennsylvania, Midwest Region, Terrestrial-- Radioactive Materials Monitoring & Transport-- Soil-- (-1987), Western Region, Alkaline Earth Isotopes, Soils, Years Living Radioisotopes 510301* -- Environment, Alaska, Ionizing Radiations
Michigan, Radiation Doses, New Mexico, California, Isotopes, Utah, Background Radiation, Uranium Isotopes, Mid-Atlantic Region, Data, Gamma Radiation, New Jersey, Electromagnetic Radiation, Actinide Isotopes, Arizona, 053000 -- Nuclear Fuels-- Environmental Aspects, Pacific Northwest Region, Kansas, 11 Nuclear Fuel Cycle And Fuel Materials, Radioactivity, Florida, Alabama, Great Lakes Region, Even-Even Nuclei, Georgia, Colorado, Monitoring, Actinide Nuclei, Kentucky, Thorium Isotopes, Southwest Region, Radiation Monitoring, Abandoned Sites, North Carolina, 54 Environmental Sciences, Usa, Ohio, Radioisotopes, Missouri, Alpha Decay Radioisotopes, Virginia, Pennsylvania, Midwest Region, Terrestrial-- Radioactive Materials Monitoring & Transport-- Soil-- (-1987), Western Region, Alkaline Earth Isotopes, Soils, Years Living Radioisotopes 510301* -- Environment, Alaska, Ionizing Radiations
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