An aerial radiological survey of the Trojan Nuclear Plant and surrounding area, Prescott, Oregon: Date of survey: July--August 1986

Technical Report · Mon Feb 01 04:00:00 EST 1988

OSTI ID:5011459

Dahlstrom, T S

An aerial radiological survey was conducted during the period 24 July through 2 August 1986 over a 124-square-kilometer (48-square-mile) area surrounding the Trojan Nuclear Plant located on the Columbia River at Prescott, Oregon. The survey was conducted at a nominal altitude of 46 meters (150 feet) with line spacings of 76 meters (250 feet). Count rates were converted to exposure rates at 1 meter above the ground. A contour map of the terrestrial gamma exposure rate was prepared and overlaid on a USGS topographic map of the area. The exposure rates varied from 8 to 10 microroentgens per hour (..mu..Rh) in the southern and northernmost regions of the survey area with somewhat lesser rates of 6.5 to 8.0 ..mu..Rh in the immediate vicinity of LongviewKelso, Washington. The highest area of increased activity was directly attributed to the main units of the plant and indicated the presence of /sup 60/Co and /sup 58/Co. Soil samples and ion chamber measurements were obtained at four locations to support the aerial data. An additional 11 soil samples were collected along the shoreline of the Columbia River. 6 refs., 11 figs., 4 tabs.

• Research Organization: EG and G Energy Measurements, Inc., Las Vegas, NV (USA)
• DOE Contract Number: AC08-83NV10282
• OSTI ID: 5011459
• Report Number(s): EGG/10282-1138; ON: DE88011668
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220500* -- Nuclear Reactor Technology-- Environmental Aspects
500300 -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
510300 -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (-1989)
520300 -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1989)
54 ENVIRONMENTAL SCIENCES
AERIAL SURVEYING
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COBALT 58
COBALT 60
COBALT ISOTOPES
COLUMBIA RIVER
DAYS LIVING RADIOISOTOPES
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ENRICHED URANIUM REACTORS
GAMMA RADIATION
GEOPHYSICAL SURVEYS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
POWER REACTORS
PWR TYPE REACTORS
RADIATIONS
RADIOISOTOPES
RADIOMETRIC SURVEYS
REACTORS
RIVERS
STREAMS
SURFACE WATERS
SURVEYS
THERMAL REACTORS
TROJAN REACTOR
WATER COOLED REACTORS
WATER MODERATED REACTORS
YEARS LIVING RADIOISOTOPES