Constrained sensitivity analysis for reactor physics problems

Jeongwon Seo, Hany Abdel-Khalik, Zoltan Perko

Research output: Contribution to journalConference articleScientificpeer-review

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Abstract

This summary introduces an algorithm for completing sensitivity analysis that respects linear constraints placed on the associated model’s input parameters. With constraints
present, the degrees of freedom of input parameters are reduced, and any changes, e.g., parameter perturbations, must respect these constraints. This summary motivates the
need for this algorithm, overviews the theoretical results, and offers representative numerical experiments. The original work focuses on the sensitivity of corewide keff [1]. In this summary, a virtual bare fast reactor whose core has three different fuel materials (U235, U238, Pu239) is employed to demonstrate the performance of the proposed algorithm. The nominal three-group constants of fast reactors are used in the criticality analysis [2]. The objective is to calculate the sensitivity of k∞ with respect to the volumetric ratio of fissile materials (U235, U238, Pu239) in a multi-group format. The constraint of this analysis is that the sum of the volumetric composition ratio of the fissile materials is equal to unity.
Original languageEnglish
Pages (from-to)431-434
JournalTransactions of the American Nuclear Society
Volume122
DOIs
Publication statusPublished - 2020
Event2020 Transactions of the American Nuclear Society, ANS 2020 - Virtual, Online, United States
Duration: 8 Jun 202011 Jun 2020

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