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Article Dans Une Revue Nuclear Engineering and Design Année : 2023

ASTEC V2.2 code validation: Illustrative results and main outcomes

Patrick Chatelard
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Résumé

Significant efforts are being continuously put for many years into the assessment of the severe accident integral code ASTEC developed by IRSN, through comparison with the results of most of the experiments developed internationally or through benchmarks with other severe accident simulation codes. For this assessment process, the IRSN code developers are supported by international partners, notably in the frame of the recent SNETP-NUGENIA ASCOM collaborative project. This paper relates to the 3rd major version of the ASTEC V2 series, V2.2, that was released in 2021 to the ASTEC community. It aims at providing an overview of the ASTEC V2.2 validation by comparison to experimental data. After a reminder of the ASTEC validation strategy, the ASTEC V2.2 validation matrix is depicted, including more than 300 experimental tests conducted at various scales in more than 50 different facilities worldwide. Then some V2.2 results are discussed for a few representative applications. These calculation examples are selected in a way to cover diverse aspects of severe accident phenomenology in order to provide a good picture of the ASTEC V2.2 modelling status for both in-vessel and ex-vessel processes. Finally, the main lessons drawn from this quite large validation task are summarized, along with an evaluation of the current physical modelling relevance and how it relates to the current state-of-the-art. Based on those outcomes, the ASTEC V2.2 validity domain is specified and some prospects for further improvements are put forward.
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Dates et versions

irsn-04195835 , version 1 (08-09-2023)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Patrick Chatelard, Laurent Laborde. ASTEC V2.2 code validation: Illustrative results and main outcomes. Nuclear Engineering and Design, 2023, 413, pp.112547. ⟨10.1016/j.nucengdes.2023.112547⟩. ⟨irsn-04195835⟩
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