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

Aerial radiological survey of the Grand Gulf Nuclear Station and surrounding area, Port Gibson, Mississippi. Date of survey: March 1982

Technical Report ·
OSTI ID:6872531
An aerial radiological survey was performed from 11 to 20 March 1982 over a 260-square-kilometer area centered on the Grand Gulf Nuclear Station at Port Gibson, Mississippi (the station was not yet in operation at the time of the survey). All gamma ray data were collected by flying east-west lines spaced 152 meters apart at an altitude 91 meters above ground level. Processed data showed that all gamma rays detected within the survey area were those expected from naturally occurring terrestrial background emitters. Count rates obtained from the aerial platform were converted to exposure rates at 1 meter above the ground and are presented in the form of an isoradiation contour map. The observed exposure rates were between 5 and 13 microroentgens per hour (..mu..R/h), with most of the area ranging from 9 to 10 ..mu..R/h. These values include an estimated cosmic ray contribution of 3.6 ..mu..R/h. The exposure rate obtained from soil samples and ionization chamber measurements taken from within the survey site displayed positive agreement with the aerial data.
Research Organization:
EG and G, Inc., Las Vegas, NV (USA). Energy Measurements Group
DOE Contract Number:
AC08-76NV01183
OSTI ID:
6872531
Report Number(s):
EGG-1183-1834; ON: DE83003931
Country of Publication:
United States
Language:
English