NORFOLK-PENINSULA AREA (ARMS-II)

Technical Report · Fri Dec 01 04:00:00 EST 1961

OSTI ID:4173781

Guillou, R B

ABS>An Aerial Radiological Measuring Survey (ARMS) of the Nonfolk-- Peninsula area was made for the Civil Effects Test Operations, Division or Biology and Medicine, U. S. Atomic Energy Cornmission between Oct. 18 and 29, 1961. The survey was part of a nationwide program to measure present environmental levels of gamma radiation. Approximately 5000 traverse miles were flown, at an altitude of 500 ft above the ground, in the area, which consists or a 100-mile square certered south of midway between Williamsburg and Norfolk, Va., and a small extension on the north to overlap the ARMS-I Fort Belvoir survey. The EG&G ARMS-n instrumertation was used in the survey. The data are presented in aeroradioactivity units, or areas with similar gamma radiation rates at 500 ft, at two map scales: (1) generalized at about 1: 1,000,000 andd (2) detafled at 1: 250,000. The aeroradioactivity in the area is less than 800 counts/sec except for four small areas in the northwest part of the area where it is less than 1200 counts/sec. In much of the area the radioactivity is less than 400 counts/sec. Aerial measurements of ground radioactivity in the ARMS-II Norfolk-- Peninsula area were everywhere consistent with what was expected, considering the geology of the area. Most of the area has a low radioactivity and the surficial materials are mostly sands and gravels, which are commoniy weakly radioactive. The western part of the area is slightly more radioactive, which would be expected from the older sedimentary rocks or the coastal plain exposed there in valleys. Artificial radionuclides are probably present in only small quantities because the maximum background gamma radioactivity in many places is less than 200 counts/sec. (auth)

• Research Organization: Edgerton, Germeshausen and Grier, Inc., Santa Barbara, Calif.
• NSA Number: NSA-18-000418
• OSTI ID: 4173781
• Report Number(s): CEX-61.6.4
• Country of Publication: United States
• Language: English

Related Subjects

AIR
CONTROL SYSTEMS
DEPOSITS
DIAGRAMS
GAMMA DETECTION
GEOLOGY
GEOLOGY AND MINERALOGY
MEASURED VALUES
RADIOACTIVITY
RADIOISOTOPES
ROCKS
SAND