Development of a tomographic instrument for gamma-ray nodestructive assay

Conference · Fri Jan 01 04:00:00 EST 1993 · Transactions of the American Nuclear Society; (United States)

OSTI ID:6908118

Prettyman, T H; Estep, R J; Sheppard, G A ^[1]

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1. Los Alamos National Laboratory, NM (United States)

Transmission-corrected gamma-ray nondestructive assay (NDA) instruments are used routinely throughout the U.S. Department of Energy complex for safeguards and waste measurements. The most widely used of these instruments is the segmented gamma scanner (SGS) that was developed by the Los Alamos Nuclear Safeguards program in the early 1970s to determine the radioisotopic content of waste. The SGS is an axial scanner that utilizes a collimated high-purity germanium (HPGe) detector to measure the emission of gamma rays from axial segments over which the sample is assumed to be uniform and homogeneous. The transmission of gamma rays through each segment is also measured at several energies to correct for sample self-attenuation. During the measurement, the sample is rotated to minimize bias caused by heterogeneities in the emitting material and matrix.

• OSTI ID: 6908118
• Report Number(s): CONF-931160--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 69
• Country of Publication: United States
• Language: English

Related Subjects

440100* -- Radiation Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CHEMICAL ANALYSIS
DETECTION
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
ELEMENTS
GAMMA DETECTION
GAMMA RADIATION
GERMANIUM
IONIZING RADIATIONS
MANAGEMENT
MATERIALS
MEASURING INSTRUMENTS
METALS
NONDESTRUCTIVE ANALYSIS
PROCESSING
RADIATION DETECTION
RADIATIONS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
REACTOR MATERIALS
SAFEGUARDS
TOMOGRAPHY
WASTE MANAGEMENT
WASTE PROCESSING