Current Inconsistencies in {sup 238}Pu, {sup 241,243}Am and {sup 242}Cm Evaluations and their Impact on Uncertainties

Improvements in the nuclear reaction modeling and nuclear parameter systematics, consistent with the description of neutron data on major actinides {sup 232}Th, {sup 233}U, {sup 235}U, {sup 238}U and {sup 239}Pu will be shown to provide a sound basis for critical assessment of the fission, capture,...

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Bibliographic Details
Published inNuclear data sheets Vol. 109; no. 12
Main Author Maslov, V.M.
Format Journal Article
LanguageEnglish
Published United States 15.12.2008
Subjects
AMERICIUM 241
AMERICIUM 243
CROSS SECTIONS
CURIUM 242
EVALUATED DATA
EVALUATION
FISSION
FISSION NEUTRONS
INELASTIC SCATTERING
NUCLEAR DATA COLLECTIONS
NUCLEAR MODELS
NUCLEAR PHYSICS AND RADIATION PHYSICS
PLUTONIUM 238
PLUTONIUM 239
SIMULATION
THORIUM 232
URANIUM 233
URANIUM 235
URANIUM 238
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Summary:Improvements in the nuclear reaction modeling and nuclear parameter systematics, consistent with the description of neutron data on major actinides {sup 232}Th, {sup 233}U, {sup 235}U, {sup 238}U and {sup 239}Pu will be shown to provide a sound basis for critical assessment of the fission, capture, inelastic scattering, and (n,xn) reaction cross sections on minor actinides. This will largely help to avoid substituting possible model deficiencies by enlarging parameter uncertainties in the conventional nuclear models. In a number of minor actinides, the uncertainty estimation of cross sections and prompt fission neutron spectra would require complete re-evaluation of basic data. Otherwise, extremely large cross section uncertainty estimates will have to be adopted, especially in the case of poorly investigated Np, Pu, Am, Cm targets.
ISSN:0090-3752
1095-9904
DOI:10.1016/j.nds.2008.11.021