In-Vessel and Ex-Vessel Corium Stabilization in Light Water Reactor

Since the Fukushima accidents, severe accident mitigation as a last protective barrier of nuclear disasters is of a great concern for the public acceptance. The paper “Effect of Subcooling on Pool Boiling of Water from Sintered Copper Microporous Coating at Different Orientations“ presents experimental results of a subcooling effect on pool boiling heat transfer using a copper microporous coating water a comparison with those of a plain surface. To minimize the negative effects of pressurization of the containment, the steam release by the ICRV linked to the RDT and cavity flooding was also simulated. Because the overpressurization of containment is due to heat of ex-vessel corium, it turned out that cavity flooding was effective for depressurization. [...]authors made a conclusion that the conceptual design of the ICRV is effective to mitigate the SGTR accident.