You need JavaScript to view this

Determination of a PWR key neutron parameters uncertainties and conformity studies applications; Determination des incertitudes liees aux grandeurs neutroniques d'interet des reacteurs a eau pressurisee a plaques combustible et applications aux etudes de conformite

Abstract

The aim of this thesis was to evaluate uncertainties of key neutron parameters of slab reactors. Uncertainties sources have many origins, technologic origin for parameters of fabrication and physical origin for nuclear data. First, each contribution of uncertainties is calculated and finally, a factor of uncertainties is associated to key slab parameter like reactivity, isotherm reactivity coefficient, control rod efficiency, power form factor before irradiation and lifetime. This factors of uncertainties were computed by Generalized Perturbations Theory in case of step 0 and by directs calculations in case of irradiation problems. One of neutronic conformity applications was about fabrication and nuclear data targets precision adjustments. Statistic (uncertainties) and deterministic (deviations) approaches were studied. Then neutronics key slab parameters uncertainties were reduced and so nuclear performances were optimised. (author)
Authors:
Publication Date:
Jul 01, 2002
Product Type:
Technical Report
Report Number:
CEA-R-6009
Resource Relation:
Other Information: 156 refs; PBD: 2002
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; A CODES; BURNUP; C CODES; COMPUTERIZED SIMULATION; CONTROL ROD WORTHS; DATA COVARIANCES; FUEL PLATES; HAFNIUM 177; HAMILTONIANS; LEAST SQUARE FIT; LEGENDRE POLYNOMIALS; MONTE CARLO METHOD; NEUTRON DIFFUSION EQUATION; NEUTRON FLUX; NEUTRON LEAKAGE; NEUTRON TRANSPORT THEORY; PWR TYPE REACTORS; REACTIVITY COEFFICIENTS
OSTI ID:
20339275
Research Organizations:
CEA Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. d'Etudes des Reacteurs
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0204324026631
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
230 pages
Announcement Date:
May 06, 2003

Citation Formats

Bernard, D. Determination of a PWR key neutron parameters uncertainties and conformity studies applications; Determination des incertitudes liees aux grandeurs neutroniques d'interet des reacteurs a eau pressurisee a plaques combustible et applications aux etudes de conformite. France: N. p., 2002. Web.
Bernard, D. Determination of a PWR key neutron parameters uncertainties and conformity studies applications; Determination des incertitudes liees aux grandeurs neutroniques d'interet des reacteurs a eau pressurisee a plaques combustible et applications aux etudes de conformite. France.
Bernard, D. 2002. "Determination of a PWR key neutron parameters uncertainties and conformity studies applications; Determination des incertitudes liees aux grandeurs neutroniques d'interet des reacteurs a eau pressurisee a plaques combustible et applications aux etudes de conformite." France.
@misc{etde_20339275,
title = {Determination of a PWR key neutron parameters uncertainties and conformity studies applications; Determination des incertitudes liees aux grandeurs neutroniques d'interet des reacteurs a eau pressurisee a plaques combustible et applications aux etudes de conformite}
author = {Bernard, D}
abstractNote = {The aim of this thesis was to evaluate uncertainties of key neutron parameters of slab reactors. Uncertainties sources have many origins, technologic origin for parameters of fabrication and physical origin for nuclear data. First, each contribution of uncertainties is calculated and finally, a factor of uncertainties is associated to key slab parameter like reactivity, isotherm reactivity coefficient, control rod efficiency, power form factor before irradiation and lifetime. This factors of uncertainties were computed by Generalized Perturbations Theory in case of step 0 and by directs calculations in case of irradiation problems. One of neutronic conformity applications was about fabrication and nuclear data targets precision adjustments. Statistic (uncertainties) and deterministic (deviations) approaches were studied. Then neutronics key slab parameters uncertainties were reduced and so nuclear performances were optimised. (author)}
place = {France}
year = {2002}
month = {Jul}
}