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

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.
Authors:
 [1]
  1. Los Alamos National Laboratory
Publication Date:
OSTI Identifier:
1184609
Report Number(s):
LA-UR-15-24338
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
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
Research Org:
Los Alamos National Laboratory (LANL)
Sponsoring Org:
DOE/LANL
Country of Publication:
United States
Language:
English
Subject:
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