NDLI: Passive neutron design study for 200-L waste drums

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Passive neutron design study for 200-L waste drums

Content Provider	United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV)
Author	Menlove, H. O. Beddingfield, D. B. Pickrell, M. M.
Organization	Los Alamos National Lab., NM (United States)
Abstract	We have developed a passive neutron counter for the measurement of plutonium in 200-L drums of scrap and waste. The counter incorporates high efficiency for the multiplicity counting in addition to the traditional coincidence counting. The {sup 252}Cf add-a-source feature is used to provide an accurate assay over a wide range of waste matrix materials. The room background neutron rate is reduced by using 30 cm of external polyethylene shielding and the cosmic-ray background is reduced by statistical filtering techniques. Monte Carlo Code calculations were used to determine the optimum detector design, including the gas pressure, size, number, and placement of the {sup 3}He tubes in the moderator. Various moderators, including polyethylene, plastics, teflon, and graphite, were evaluated to obtain the maximum efficiency and minimum detectable mass of plutonium.
Sponsorship	USDOE, Washington, DC (United States)
Related Links	https://www.osti.gov/biblio/534520
Page Count	27
File Format	PDF
DOI	10.2172/534520
Language	English
Publisher Date	1997-09-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS NUCLEAR FUELS PLUTONIUM MEASURING METHODS RADIATION DETECTORS DESIGN RADIOACTIVE WASTE MANAGEMENT MATRIX MATERIALS MULTIPLICITY SHIELDING MONTE CARLO METHOD CALIFORNIUM 252 COINCIDENCE METHODS
Content Type	Text
Resource Type	Technical Report

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