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Title: Sensitivity and uncertainty analysis of reactivities for UO2 and MOX fueled PWR cells

The purpose of this paper is to apply our improved method for calculating sensitivities and uncertainties of reactivity responses for UO{sub 2} and MOX fueled pressurized water reactor cells. The improved method has been used to calculate sensitivity coefficients relative to infinite dilution cross-sections, where the self-shielding effect is taken into account. Two types of reactivities are considered: Doppler reactivity and coolant void reactivity, for each type of reactivity, the sensitivities are calculated for small and large perturbations. The results have demonstrated that the reactivity responses have larger relative uncertainty than eigenvalue responses. In addition, the uncertainty of coolant void reactivity is much greater than Doppler reactivity especially for large perturbations. The sensitivity coefficients and uncertainties of both reactivities were verified by comparing with SCALE code results using ENDF/B-VII library and good agreements have been found.
Authors:
 [1] ;  [2] ;  [1]
  1. Research Institute of Nuclear Engineering, University of Fukui, Kanawa-cho 1-2-4, Tsuruga-shi, Fukui-ken, 914-0055 (Japan)
  2. (Egypt)
Publication Date:
OSTI Identifier:
22499107
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1702; Journal Issue: 1; Conference: ICCMSE 2015: International conference of computational methods in sciences and engineering 2015, Athens (Greece), 20-23 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; COMPARATIVE EVALUATIONS; COOLANTS; CROSS SECTIONS; DATA COVARIANCES; DILUTION; DISTURBANCES; DOPPLER COEFFICIENT; EIGENVALUES; MIXED OXIDE FUELS; NUCLEAR DATA COLLECTIONS; PERTURBATION THEORY; PWR TYPE REACTORS; REACTIVITY; S CODES; SELF-SHIELDING; SENSITIVITY; URANIUM DIOXIDE; VOIDS