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Stewart, J.E.; Menlove, H.O.; Ferran, R.R.; Aparo, M.; Zeppa, P.; Troiani, F.
Los Alamos National Lab., NM (United States); ENEA, Saluggia (Italy). Centro Ricerche Energia. Funding organisation: USDOE, Washington, DC (United States); Nuclear Regulatory Commission, Washington, DC (United States); Department of State, Washington, DC (United States); Arms Control and Disarmament Agency, Washington, DC (United States)1993
Los Alamos National Lab., NM (United States); ENEA, Saluggia (Italy). Centro Ricerche Energia. Funding organisation: USDOE, Washington, DC (United States); Nuclear Regulatory Commission, Washington, DC (United States); Department of State, Washington, DC (United States); Arms Control and Disarmament Agency, Washington, DC (United States)1993
AbstractAbstract
[en] For passive neutron-coincidence-counting verification measurements of PuO2 and MOX powder, assay biases have been observed that result from moisture entrained in the sample. This report describes a unique set of experiments in which MOX samples, with a range of moisture concentrations, were produced and used to calibrate and evaluate two prototype moisture monitors. A new procedure for moisture corrections to PuO2 and MOX verification measurements yields MOX assays accurate to 1.5% (1σ) for 0.6- and 1.1-kg samples. Monte Carlo simulations were used to extend the measured moisture calibration data to higher sample masses. A conceptual design for a high-efficiency neutron coincidence counter with improved sensitivity to moisture is also presented
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Source
May 1993; 33 p; ISPO--351; CONTRACT W-7405-ENG-36; OSTI as DE93013599; NTIS; INIS; US Govt. Printing Office Dep
Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
ACTINIDE COMPOUNDS, ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, CALCULATION METHODS, CHALCOGENIDES, COUNTING TECHNIQUES, DATA, EVEN-EVEN NUCLEI, HEAVY NUCLEI, INFORMATION, ISOTOPES, NUCLEI, NUMERICAL DATA, OXIDES, OXYGEN COMPOUNDS, PLUTONIUM COMPOUNDS, PLUTONIUM ISOTOPES, RADIOISOTOPES, TRANSURANIUM COMPOUNDS, YEARS LIVING RADIOISOTOPES
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