Use of Covariance Matrices in a Consistent (Multiscale) Data Assimilation for Improvement of Basic Nuclear Parameters in Nuclear Reactor Applications: from Meters to Femtometers
A new approach is proposed, the consistent data assimilation, that allows to link the integral data experiment results to basic nuclear parameters employed by evaluators to generate ENDF/B point energy files in order to improve them. A practical example is provided where the sodium neutron propagation experiments, EURACOS and JANUS-8, are used to improve via modifications of {sup 23}Na nuclear parameters (like scattering radius, resonance parameters, Optical model parameters, Statistical Hauser-Feshbach model parameters, and Preequilibrium Exciton model parameters) the agreement of calculation versus experiments for a series of measured reaction rate detectors slopes. Future work involves comparison of results against a more traditional multigroup adjustments, and extension to other isotope of interest in the reactor community as {sup 56}Fe, actinides, and fission products.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE NE OFFICE OF NUCLEAR ENERGY (NE)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1040515
- Report Number(s):
- BNL-96322-2011-JA; KPSJAS; R&D Project: EST-003-NEFA; KB0301041; TRN: US1202479
- Journal Information:
- Journal of the Korean Physical Society, Vol. 59, Issue 2; ISSN 0374-4884
- Country of Publication:
- United States
- Language:
- English
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