Model comparisons on molten core-concrete interactions

NUCLEAR ENGINEERING

Model comparisons on molten core-concrete interactions

TONG Lili，

CAO Xuewu，

LI Jingxi，

YANG Yajun

Nuclear Science and Techniques

Vol.20, No.4

pp.251-256

Published in print 20 Aug 2009

DOI：10.13538/j.1001-8042/nst.20.251-256

34300

Based on the plant model of 600-MW PWR, the molten core-concrete interactions (MCCI) under different models are studied. Station blackout (SBO) with steam-driven auxiliary feed water pump failure is selected as the case for the model comparisons analysis. The result shows that thermal resistance model between debris and concrete has much influence on the consequence of MCCI. The concrete erosion rate calculated with gas film model is much higher than that of slag film model. Some other model comparisons such as the chemical reaction heat and the configuration molten pool are also discussed.

Severe accidentMolten core-concrete interactionsConcrete ablation rateThermal resistance

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