Development and assessment of ASTEC-Na fuel pin thermo-mechanical models performed in the European JASMIN project

Journal article (2018)

Authors

S. Perez-Martin Karlsruhe Institut für Technologie
W. Pfrang Karlsruhe Institut für Technologie
N. Girault IRSN Institut de Radioprotection et de Surete Nucleaire
L. Cloarec IRSN Institut de Radioprotection et de Surete Nucleaire
L. Laborde IRSN Institut de Radioprotection et de Surete Nucleaire
M. Buck University of Stuttgart
V. Matuzas European Commission
A. Flores y Flores European Commission
A.L. Smith European Commission
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Published Date

2018

Language

English

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Abstract

ASTEC-Na is a computer code system which evaluates protected and unprotected accidents in Sodium-cooled Fast Reactors throughout the Initiation Phase. The fuel pin behavior models implemented in ASTEC-Na simulate the essential aspects of the thermal and mechanical behavior of SFR fuel pins in nominal and accidental conditions. Besides the improvement of existing ASTEC-Na models, a specific cladding mechanical model and an in-pin fuel relocation model have been developed during the JASMIN project, where the latter has been already implemented in the code. ASTEC-Na fuel pin behavior models are described in this paper and their transient predictions for four CABRI transient tests are compared to available experimental data as well as to SAS-SFR and SIMMER-III code calculations. Conclusions on the overall performance of ASTEC-Na fuel pin models are also presented.