Prototype fast neutron counter for the assay of impure plutonium
Conference
·
OSTI ID:5890800
A fast coincident neutron counter using liquid scintillators and gamma-ray/neutron pulse-shape discrimination has been constructed for the analysis of plutonium samples with unknown self-multiplication and (..cap alpha..,n) production. The counter was used to measure plutonium-bearing materials that cover a range of masses and (..cap alpha..,n) reaction rates of importance to the safeguards community. Measured values of the /sup 240/Pu effective mass differed, on average, from their declared values by 0.4% for plutonium oxides and by -2.2% for metal and MgO-loaded samples. Poorer results were obtained for materials with large (..cap alpha..,n) reaction rates and low self-multiplication such as plutonium ash and plutonium fluoride.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5890800
- Report Number(s):
- LA-UR-87-3678; CONF-871110-8; ON: DE88003181
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
055001 -- Nuclear Fuels-- Safeguards
Inspection
& Accountability-- Technical Aspects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101* -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
ACTINIDES
CHEMICAL ANALYSIS
COUNTING TECHNIQUES
ELEMENTS
MEASURING INSTRUMENTS
METALS
NEUTRON DETECTORS
PLUTONIUM
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION DETECTORS
SCINTILLATION COUNTING
TRANSURANIUM ELEMENTS
Inspection
& Accountability-- Technical Aspects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101* -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
ACTINIDES
CHEMICAL ANALYSIS
COUNTING TECHNIQUES
ELEMENTS
MEASURING INSTRUMENTS
METALS
NEUTRON DETECTORS
PLUTONIUM
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION DETECTORS
SCINTILLATION COUNTING
TRANSURANIUM ELEMENTS