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Progress in modelling fission-product release: an update with respect to IRSN’s release codes


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9th International CNS CANDU Fuel Conference, Belleville, Ontario, Canada, 17-21 septembre 2005

R. Dubourg, M.P. Kissane , P. Taylor, W. Plumecocq.

Type de document > *Congrès/colloque

Mots clés > sûreté, accident grave, MFPR (code), relâchement de produits de fission

Unité de recherche > IRSN/DPAM/SEMIC/LEPF

Auteurs > DUBOURG Roland, KISSANE Martin, PLUMECOCQ William

Date de publication > 17/09/2005

Résumé

IRSN presented in detail at this conference in 2003 the modelling of its release codes, ASTEC/ELSA and MFPR. Progress relating to key objectives is described here. ELSA aims to calculate reliably and rapidly release of fission products (FPs) and structural materials from a degrading core for all in-vessel configurations. Two areas were targeted for improvement: release of so-called semi-volatile FPs and release of structural materials. For the mechanistic code MFPR developed by IBRAE (Russian Academy of Sciences) and IRSN, with the new objective of analysis of design-basis loss-of-coolant accidents, modelling of fission-gas release has been improved mainly addressing processes occurring during normal operation. Further improvement depends in part on results of experiments and analyses that IRSN has launched with partners.