Severe accident management concept of the VVER-1000 and the justification of corium retention in a crucible-type core catcher
2009 (English)In: Nuclear Engineering and Technology, ISSN 1738-5733, Vol. 41, no 5, 561-574 p.Article in journal (Refereed) Published
First ex-vessel core catcher has been applied to the practical design of NPPs with VVER-1000 reactors built in China(Tyanvan) and India (Kudankulam) for severe accident management (SAM) and mitigation of SA consequences. The paperpresents the concept and basic design of this crucible-type core catcher as well as an evaluation of its efficiency. Theimportant role of oxidic sacrificial material is discussed. Insight into the behaviour of the molten pool, which forms in thecatcher after core relocation from the reactor vessel, is provided. It is shown that heat loads on the water-cooled vessel wallsare kept within acceptable limits and that the necessary margins for departure from nucleate boiling (DNB) and of vesselfailure caused by thermo-mechanical stress are satisfactorily provided for.
Place, publisher, year, edition, pages
2009. Vol. 41, no 5, 561-574 p.
VVER Reactor, Severe Accident, Core Melting, Ex-vessel Core Catcher, Melt Retention
IdentifiersURN: urn:nbn:se:kth:diva-53463ISI: 000267820800001OAI: oai:DiVA.org:kth-53463DiVA: diva2:470116
QC 201112292011-12-282011-12-282012-01-21Bibliographically approved