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Safety Analysis of SMR with PAssive Mitigation strategies - Severe Accident

Description du projet

Faciliter les procédures d’homologation des réacteurs à eau pressurisée intégraux en Europe

Le déploiement de petits réacteurs modulaires (PRM) suscite un intérêt croissant en Europe. Le réacteur à eau pressurisée intégral (iPWR), prêt à être homologué en tant que nouvelle structure, est l’un des types de PRM. Malgré le renforcement des trois premiers niveaux de l’approche «défense en profondeur» (DiD), il y a lieu de procéder à une démonstration en bonne et due forme (niveaux DiD 4-5) de la capacité de l’iPWR à faire face aux accidents graves (AG). Dans ce contexte, le projet SASPAM-SA, financé par l’UE, vise à étudier l’applicabilité et le transfert au réacteur iPWR des connaissances et du savoir-faire concernant les grands réacteurs à eau légère en service, en prenant en compte les besoins européens en matière d’analyse d’homologation pour la zone de planification des AG et des situations d’urgence. Les résultats du projet contribueront à accélérer le processus d’homologation et d’implantation des iPWR en Europe.

Objectif

Small Modular Reactors (SMR) are one of the key options for the near-term deployment of new nuclear reactors. Currently in Europe there is a growing interest towards the deployment of SMRs, and several activities are underway in many countries preparing for possible licensing needs. In particular, Integral Pressurized Water Reactor (iPWR) are ready to be licensed as new builds because they start from the well-proven and established large Light Water Reactor (LWR) technology, incorporate their operational plant experience/feedback, and include moderate evolutionary design modifications to increase the inherent safety of the plant. However, despite the reinforcement of the first three levels of the Defence-in-Depth (DiD), e.g. with the adoption of passive safety systems, a sound demonstration of iPWR ability to address Severe Accidents (SA) should be carried out (DiD levels 4-5). The main objectives of the project will be to transfer and adapt such knowledge and know-how to iPWR, in view of the European SA and Emergency Planning Zone (EPZ) analyses. The main elements considered are: (i) the identification of plausible SA scenarios for iPWRs with the related conditions in the vessel and in the containment, (ii) the study of the applicability of the existing experimental databases to iPWR and identify new experimental needs, (iii) the assessment of the capability of internationally recognized European and Non-European computational tools (largely used in Europe) to describe the behaviour of the most promising iPWR designs during SA scenarios, and (iv) the prediction of the resulting radiological impact on- and off-site, taking into account special SA mitigation/management strategies. The expected outcomes of the project will help speeding up the licensing of iPWRs in Europe, as well as the siting processes of these reactors in light of their possible use near densely populated areas.

Coordinateur

AGENZIA NAZIONALE PER LE NUOVE TECNOLOGIE, L'ENERGIA E LO SVILUPPO ECONOMICO SOSTENIBILE
Contribution nette de l'UE
€ 342 656,00
Adresse
LUNGOTEVERE GRANDE AMMIRAGLIO THAON DI REVEL 76
00196 Roma
Italie

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Région
Centro (IT) Lazio Roma
Type d’activité
Research Organisations
Liens
Coût total
€ 456 875,00

Participants (21)

Partenaires (1)