PRACTICAL METHOD FOR ESTIMATING NEUTRON CROSS SECTION COVARIANCES IN THE RESONANCE REGION
Recent evaluations of neutron cross section covariances in the resolved resonance region reveal the need for further research in this area. Major issues include declining uncertainties in multigroup representations and proper treatment of scattering radius uncertainty. To address these issues, the present work introduces a practical method based on kernel approximation using resonance parameter uncertainties from the Atlas of Neutron Resonances. Analytical expressions derived for average cross sections in broader energy bins along with their sensitivities provide transparent tool for determining cross section uncertainties. The role of resonance-resonance and bin-bin correlations is specifically studied. As an example we apply this approach to estimate (n,{gamma}) and (n,el) covariances for the structural material {sup 55}Mn.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- DOE - Nuclear Energy,Science, & Technology
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1013489
- Report Number(s):
- BNL-93617-2010; R&D Project: EST-003-NEFA; KB0301041; TRN: US1102666
- Resource Relation:
- Related Information: International Conference on Nuclear Data for Science and Technology; Jeju Island, Korea; 20100426 through 20100430
- Country of Publication:
- United States
- Language:
- English
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