The Prompt Fission Neutron Spectrum: From Experiment to the Evaluated Data and its Impact on Critical Assemblies

Conference · Wed Jun 10 00:00:00 EDT 2015

OSTI ID:1184609

Rising, Michael Evan ^[1]

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1. Los Alamos National Laboratory

After a brief introduction concerning nuclear data, prompt fission neutron spectrum (PFNS) evaluations and the limited PFNS covariance data in the ENDF/B-VII library, and the important fact that cross section uncertainties ~ PFNS uncertainties, the author presents background information on the PFNS (experimental data, theoretical models, data evaluation, uncertainty quantification) and discusses the impact on certain well-known critical assemblies with regard to integral quantities, sensitivity analysis, and uncertainty propagation. He sketches recent and ongoing research and concludes with some final thoughts.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: DOE/LANL
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1184609
• Report Number(s): LA-UR-15-24338
• Resource Relation: Conference: 2015 American Nuclear Society Annual Meeting ; 2015-06-07 - 2015-06-11 ; San Antonio, Texas, United States, Richmond, VA (United States), 3-8 May 2015
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
PROMPT NEUTRONS
FISSION SPECTRA
EVALUATED DATA
DATA COVARIANCES
NUCLEAR DATA COLLECTIONS
CROSS SECTIONS
SENSITIVITY ANALYSIS
GODIVA REACTOR
JEZEBEL REACTOR
FLATTOP REACTOR
BIG TEN REACTOR
Prompt fission neutron spectrum