Environmental radiological studies in 1989 near the Rancho Seco Nuclear Power Generating Station
In December 1988, the Sacramento Municipal Utilities District (SMUD) asked the Lawrence Livermore National Laboratory's (LLNL) Environmental Sciences Division (ENV) to collect sediment, water,and fish samples downstream from the Rancho Seco Nuclear Power Generating Station for analysis of radionuclides to compare with results from earlier surveys in 1984 through 1987 (1--8). ENV was, however, asked to reduce the total number of sample collections to a minimum in this study because of financial constraints. The proposal ENV submitted for the 1989 Environmental Radiological Studies downstream of the Rancho Seco Nuclear Power Generating Station reflected this reduction, but we believe, nevertheless, the 1989 efforts do allow us to make some meaningful comparisons with the previous studies. Cesium-137 is the most significant radionuclide still observed downstream from the Rancho Seco Nuclear Power Plant. Only occasionally is {sup 134}Cs or {sup 60}CO observed. In 1989, the concentration of {sup 137}Cs in the water and fish decreased with distance from the plant to the same level that is was in 1987, and was lower than it had been from 1984 through 1986. The concentration ratio (CR) for {sup 137}Cs in fish is between 1000 and 1500, which is below the NRC default value of 2000. Physical mixing in the creek environment has moved the {sup 137}Cs deeper into the sediment column, thereby reducing the concentration in the top 12 cm relative to that in previous years. 8 refs., 18 figs., 9 tabs.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6273385
- Report Number(s):
- UCRL-ID-106111; ON: DE91004991; TRN: 91-002308
- Country of Publication:
- United States
- Language:
- English
Similar Records
Environmental radiological studies conducted during 1986 in the vicinity of the Rancho Seco Nuclear Power Generating Station
Radionuclides in sediments collected downstream from the Rancho Seco Nuclear Power Generating Station
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CESIUM 134
ECOLOGICAL CONCENTRATION
CESIUM 137
COBALT 60
FISHES
CONTAMINATION
RANCHO SECO-1 REACTOR
RADIOACTIVE EFFLUENTS
RANCHO SECO-2 REACTOR
SEDIMENTS
RADIONUCLIDE MIGRATION
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AQUATIC ECOSYSTEMS
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COMPILED DATA
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ENVIRONMENTAL EXPOSURE PATHWAY
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POWER PLANTS
RADIONUCLIDE KINETICS
SAMPLING
WATER
ALKALI METAL ISOTOPES
ANIMALS
AQUATIC ORGANISMS
BETA DECAY RADIOISOTOPES
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COBALT ISOTOPES
DATA
ECOSYSTEMS
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HOURS LIVING RADIOISOTOPES
HYDROGEN COMPOUNDS
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INTERMEDIATE MASS NUCLEI
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ISOMERIC TRANSITION ISOTOPES
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MINUTES LIVING RADIOISOTOPES
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ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
POWER REACTORS
PWR TYPE REACTORS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPES
REACTORS
USA
VERTEBRATES
WASTES
WATER COOLED REACTORS
WATER MODERATED REACTORS
YEARS LIVING RADIOISOT
YEARS LIVING RADIOISOTOPES
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