Review Article

Analysis of late phase severe accident phenomena in CANDU plant

[+] Author and Article Information
D. Dupleac

Power Plant Engineering Faculty, Politehnica University 313 Splaiul Independentei, 060042, sect. 6, Bucharest, Romania

1Corresponding author.

ASME doi:10.1115/1.4035416 History: Received July 30, 2016; Revised December 05, 2016


The paper overviews the analytical studies performed at Politehnica University of Bucharest on the analysis of late phase severe accident phenomena in a CANDU plant. The calculations start from a dry debris bed at the bottom of calandria vessel. Both SCDAPSIM/RELAP code and Ansys-Fluent CFD code are used. Parametric studies are performed in order to quantify the effect of several identified sources of uncertainty on calandria vessel failure: metallic fraction of zirconium inside the debris, containment pressure, timing of water depletion inside calandria vessel, steam circulation in calandria vessel above debris bed, debris temperature at moment of water depletion inside calandria vessel, calandria vault nodalization, and the gap heat transfer coefficient.

Copyright (c) 2016 by ASME
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