Collapse Criterion for the CANDU 6 Calandria Vault Floor during a Severe Accident

[+] Author and Article Information
Robert David

Canadian Nuclear Laboratories 286 Plant Rd., Chalk River, ON, Canada, K0J 1J0

1Corresponding author.

ASME doi:10.1115/1.4035336 History: Received July 07, 2016; Revised November 22, 2016


The thickness at which the calandria vault floor in a generic CANDU 6 nuclear reactor may collapse while undergoing molten core-concrete interaction was studied using an approximate analytical model and a finite element model. It was confirmed that the collapse criterion of 0.45 m floor thickness that is currently used in severe accident analyses is adequate. The estimated timing of collapse is subject to uncertainty of several hours.

Copyright (c) 2016 by ASME
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