Calibration of the RLS HPGe spectral gamma ray logging system

Technical Report · Fri Nov 01 00:00:00 EST 1991

OSTI ID:5832160

Koizumi, C J; Brodeur, J R; Ulbricht, W H; Price, R K

Gamma-ray spectral data have been recorded with the Radionuclide Logging System (RLS) high purity germanium (HPGe) system at (1) the American Petroleum Institute (API) spectral gamma-ray calibration center in Houston, Texas; (2) the US Department of Energy (DOE) spectral gamma-ray field calibration facility in Spokane, Washington; and (3) the DOE spectral gamma-ray primary calibration center in Grand Junction, Colorado. Analyses of the Grand Junction data yielded: calibration constants for the natural gamma-ray sources (potassium, uranium and thorium), energy-dependent borehole diameter corrections for the aid-filled borehole, energy-dependent borehole casing corrections for steel casing over a range of thicknesses from 0 to 79 cm (5/16 in.), a casing index function that varies with casing thickness and provides a method for verifying that the correct casing correction is applied, and an energy-dependent inverse function that is the basis for assessment of subsurface concentrations of man-made gamma-ray emitters such as cesium-137 and cobalt-60.

• Research Organization: Westinghouse Hanford Co., Richland, WA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-87RL10930
• OSTI ID: 5832160
• Report Number(s): WHC-EP-0464; ON: DE92006494
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
58 GEOSCIENCES
BOREHOLES
GAMMA LOGGING
GAMMA SPECTROMETERS
CALIBRATION
NATURAL RADIOACTIVITY
RADIOISOTOPES
WELL CASINGS
CAVITIES
ISOTOPES
MEASURING INSTRUMENTS
RADIOACTIVITY
RADIOACTIVITY LOGGING
SPECTROMETERS
WELL LOGGING
440400* - Well Logging Instrumentation
052000 - Nuclear Fuels- Waste Management
580000 - Geosciences