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- W1569334070 abstract "Inventory measurement of a sample's total plutonium and other actinides content by non-destructive assay (NDA) is an important component of safeguarding special nuclear material (SNM). Gamma-ray spectrometry measurements of relative isotopic abundances, coupled with a calorimetry measurement, can determine sample SNM content for inventory measurement. The Actinide Isotopic Analysis System (AIAS) is a newly developed two-detector gamma-ray spectrometry-based system that will determine isotopic ratios of Pu and U, Np, and Am abundances relative to plutonium for the Nuclear Material Storage Facility at Los Alamos National Laboratory. Spectral analysis is performed using Multiple Group Analysis (MGA) program or a customized version of the GRouP ANaLysis (GRPANL) computer program. The system can measure samples containing reactor grade plutonium, weapons grade plutonium, and plutonium enriched in either {sup 238}Pu or {sup 242}Pu (>50%). Software that controls the system is driven by a user-friendly menu of options. Long- and short-term stability tests were made on two plutonium standards (6 and 12% {sup 240}Pu). Fifteen measurements were used for the long-term test over a three-week period whereas the short-term test consisted of fifteen consecutive measurements. This system offers an improvement in the flexibility and operator use for actinide gamma-ray isotopic analysis with superior accuracy andmore » precision. 2 refs., 3 figs.« less" @default.
- W1569334070 created "2016-06-24" @default.
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- W1569334070 date "1991-01-01" @default.
- W1569334070 modified "2023-09-24" @default.
- W1569334070 title "Actinide isotopic analysis system for Los Alamos plutonium-handling facility" @default.
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