Use of similarity indexes to identify spatial correlations of sodium voidreactivity coefficients

Jiménez-Carrascosa, Antonio and García Herranz, Nuria (2020). Use of similarity indexes to identify spatial correlations of sodium voidreactivity coefficients. "Nuclear Engineering and Technology", v. 52 (n. 11); pp. 2442-2451. ISSN 1738-5733. https://doi.org/10.1016/j.net.2020.04.021.

Description

Title: Use of similarity indexes to identify spatial correlations of sodium voidreactivity coefficients
Author/s:
  • Jiménez-Carrascosa, Antonio
  • García Herranz, Nuria
Item Type: Article
Título de Revista/Publicación: Nuclear Engineering and Technology
Date: November 2020
ISSN: 1738-5733
Volume: 52
Subjects:
Freetext Keywords: sodium fast reactors sodium void reactivity spatial correlation sensitivity analysis similarity
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The safety level of Sodium Fast Reactors is directly related with the sodium void reactivity. A low-void effect design has been proposed within the Horizon2020 ESFR-SMART project thanks to the introduction of a sodium plenum above the active core. In order to assess the impact of this core conception on transient analysis, a map with the spatial distribution of sodium void worth can be computed and fed into a point-kinetics-based transient code. Due to the spatial correlations between neighboring zones, the global effect of voiding two different axial or radial regions is not necessarily the sum of both individual contributions. Neglecting those correlations in the void worth map and consequently in the transient analysis may lead to an unrealistic prediction of the transient sequences. In this work, a method based on sensitivity analysis and similarity assessment is proposed for predicting those correlations. The method proved to be able to establish correlations between axial slices of a sub-assembly and was checked against realistic sodium void propagation patterns.

Funding Projects

TypeCodeAcronymLeaderTitle
Horizon 2020754501ESFR-SMARTPaul Scherrer InstitutEuropean Sodium Fast Reactor Safety Measures Assessment and Research Tools

More information

Item ID: 66226
DC Identifier: https://oa.upm.es/66226/
OAI Identifier: oai:oa.upm.es:66226
DOI: 10.1016/j.net.2020.04.021
Official URL: https://www.sciencedirect.com/science/article/pii/S1738573320301625?via%3Dihub
Deposited by: Memoria Investigacion
Deposited on: 03 Mar 2021 16:21
Last Modified: 03 Mar 2021 16:21
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