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Herman, M.; Arcilla, R.; Mattoon, C.M.; Mughabghab, S.F.; Oblozinsky, P.; Pigni, M.; Pritychenko, B.; Songzoni, A.A.
Brookhaven National Laboratory (United States). Funding organisation: Doe - Office Of Science (United States)2008
Brookhaven National Laboratory (United States). Funding organisation: Doe - Office Of Science (United States)2008
AbstractAbstract
[en] We present the NNDC-BNL methodology for estimating neutron cross section covariances in thermal, resolved resonance, unresolved resonance and fast neutron regions. The three key elements of the methodology are Atlas of Neutron Resonances, nuclear reaction code EMPIRE, and the Bayesian code implementing Kalman filter concept. The covariance data processing, visualization and distribution capabilities are integral components of the NNDC methodology. We illustrate its application on examples including relatively detailed evaluation of covariances for two individual nuclei and massive production of simple covariance estimates for 307 materials. Certain peculiarities regarding evaluation of covariances for resolved resonances and the consistency between resonance parameter uncertainties and thermal cross section uncertainties are also discussed
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1 Sep 2008; 103 p; U.S. DOE Reactors Campaign; Upton, NY (United States); 1-30 Sep 2008; KB0301041; AC02-98CH10886; Available from http://www.pubs.bnl.gov/documents/43526.pdf; PURL: https://www.osti.gov/servlets/purl/939948-sR6uW3/; doi 10.2172/928418
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