Estimation of the nuclear fuel assembly eigenfrequencies in the probability sense
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Date issued
2014
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of West Bohemia
Abstract
The paper deals with upper and lower limits estimation of the nuclear fuel assembly eigenfrequencies, whose
design and operation parameters are random variables. Each parameter is defined by its mean value and standard
deviation or by a range of values. The gradient and three sigma criterion approach is applied to the calculation
of the upper and lower limits of fuel assembly eigenfrequencies in the probability sense. Presented analytical
approach used for the calculation of eigenfrequencies sensitivity is based on the modal synthesis method and the
fuel assembly decomposition into six identical revolved fuel rod segments, centre tube and load-bearing skeleton
linked by spacer grids. The method is applied for the Russian TVSA-T fuel assembly in the WWER1000/320 type
reactor core in the Czech nuclear power plant Temelín.
Description
Subject(s)
nukleární palivový článek, vlastní frekvence, náhodné parametry, matematické modelování
Citation
Applied and Computational Mechanics. 2014, vol. 8, no. 2, p. 229-236.