Review of well-logging techniques. [For use in remedial action programs]
A literature review has been conducted to determine whether suitable borehole-logging techniques exist for the measurement of gamma-ray-emitting elements using downhole detectors. Most of the methods that have been used for the last 30 years by the uranium-exploration industry involve passive gamma-ray measurement techniques utilizing NaI(Tl) and, occasionally, intrinsic germanium detectors. Parameters the industry has had to consider in calibrating these detectors are variations in (1) casing material and thickness, (2) water in the borehole, (3) hole diameter, (4) disequilibrium between uranium and its daughters in the ore zone, (5) spatial distribution of the radioactive material, and (6) dead time of the analyzer. The methods they have used to address these variable parameters appear to be applicable to remedial action programs. The techniques that have been used for the measurement of subsurface radium concentration by DOE during the engineering assessment of UMTRAP/FUSRAP sites and by NRC at one remedial action site will be described in this report.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6190467
- Report Number(s):
- NUREG/CR-3186; PNL-4634; ON: DE83010786
- Country of Publication:
- United States
- Language:
- English
Similar Records
NDA technology for uranium resource evaluation. Progress report, July 1--September 30, 1977. [Gamma ray spectra calculations; disequilibrium probe; photoneutron probe]
Radiation Protection Considerations at USACE Formerly Utilized Sites Remedial Action Program (FUSRAP) Projects
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
54 ENVIRONMENTAL SCIENCES
RADIUM 226
RADIATION MONITORING
WELL LOGGING
BOREHOLES
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
CAVITIES
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
MONITORING
NUCLEI
RADIOISOTOPES
RADIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
440400* - Well Logging Instrumentation
052000 - Nuclear Fuels- Waste Management
054000 - Nuclear Fuels- Health & Safety
510301 - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- Soil- (-1987)