During a severe accident of a nuclear power plant, the steam explosion may cause a strong shock wave that affects the availability of equipment in the containment and even destroy the integrity of the pressure vessel and containment. This violent phase-change phenomenon is called steam explosion.
Under certain conditions, the heat transfer area between the melt and coolant will increase rapidly, and the time scale of heat transfer becomes much smaller than the time scale of decompression, which may lead to the generation of shock wave. Introductionĭuring a hypothetical severe accident in light water reactors (LWR), molten fuel (corium) may get contact with coolant (water), resulting in fuel-coolant interactions (FCI).
According to the simulation results, the induction heating system of frequency 47 kHz is suitable for the experiment, with a good agreement in temperature between the measured and the predicted.
#JOULE HEATING IN COMSOL 5.3 SKIN#
Meanwhile, the skin effect of induction heating is analyzed to guide the choice of frequency and inductor of the heating system. Given a frequency, the relationship between the crucible’s average temperature and the inductor’s current is obtained, which is instrumental to select the power supply of the induction heating system. The COMSOL code was employed to simulate the induction heating characteristics of a graphite crucible under different current and frequency of the work coil (inductor). This article is concerned with the design of the heating system, which applies electromagnetic induction heating method. The heating system is important for the facility to prepare molten material in a crucible.
The experimental facility VULCAN was setup to study the fuel-coolant interaction (FCI) phenomena in a postulated severe accident of light water reactors.
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