Community Research and Development Information Service - CORDIS


Severe accidents in light water nuclear reactors occur when reactor vessel water inventory decreases and there is no available additional water coolant to be delivered into the core. In general during an extended severe accident sequence a period exists in which the reactor core, after a partial or total melt down, is poured into the lower plenum that can have some water present. The study of the interaction of the melt fuel with the water is the objective of melt fuel coolant interaction (MFCI) activities. In order to study the phenomenological behaviour of the thermal hydraulic system, our work has been focused on the simulation (with COMETA thermalhydraulic code) of an extended MFCI accident in a hypothetical reactor with arbitrary geometry. The objective was to correlate the initial conditions of the reactor with the phenomena evolution.

Additional information

Authors: PLA P, JRC Ispra (IT);ANNUNZIATO A, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 24 Reunión Annual, Valladolid (ES), October 14-16, 1998
Availability: Available from (1) as Paper ES 41559 ORA
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