Neutron collar calibration and evaluation for assay of LWR fuel assemblies containing burnable neutron absorbers

Technical Report · Wed Oct 31 23:00:00 EST 1990

DOI:https://doi.org/10.2172/6531379· OSTI ID:6531379

Henriksen, P W ^[1]; Menlove, H O; Stewart, J E; Qiao, S Z; Wenz, T R ^[2]; Verrecchia, G P.D. ^[3]

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1. ed.
2. Los Alamos National Lab., NM (USA)
3. Commission of the European Communities, Luxembourg (Luxembourg). Safeguards Directorate

The neutron coincidence collar is used to verify the uranium content in light water reactor fuel assemblies. An AmLi neutron source actively interrogates the fuel assembly to measure the {sup 235}U content and the {sup 238}U content can be verified from a passive neutron coincidence measurement. This report gives the collar calibration data for pressurized water reactor (PWR) and boiling water reactor (BWR) fuel assemblies both with and without cadmium liners. Calibration curves and correction factors are presented for neutron absorbers (burnable poisons) and various fuel assembly sizes. The data were collected using the Los Alamos BWR and PWR test assemblies as well as fuel assemblies from several fuel fabrication facilities. 11 refs., 15 figs., 14 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOD
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6531379
• Report Number(s): LA-11965-MS; ISPO--323; ON: DE91001718
• Country of Publication: United States
• Language: English

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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ALPHA DECAY RADIOISOTOPES
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CADMIUM
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MATHEMATICAL MODELS
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MINUTES LIVING RADIOISOTOPES
NEUTRON ABSORBERS
NEUTRON DETECTORS
NEUTRON SOURCES
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RADIATION DETECTORS
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YEARS LIVING RADIOISOTOPES