Core melt cooling device, reactor containment vessel, and method of installing core melt cooling device

摘要

PPROBLEM TO BE SOLVED: To improve cooling efficiency of molten corium generated when the core in a reactor vessel melts and penetrates the reactor vessel without enlarging the floor area. PSOLUTION: The under side of the reactor vessel includes a molten corium cooling device 30 having a water supply chamber 10, a plurality of water channels 11 having a lower inlet section 21 connected to this and an upper outlet section 22 opened upward, and a heat resistant material 12 attached to the top surfaces of the water channels 11. The plurality of water channels 11 are combined so as to form a circular conical shape opening upward. Cooling water is supplied to the water supply chamber 10 via a water injection pipe 8. The cooling water is distributed to the water channels 11 by the water supply chamber 10, goes up in a cooling water channel 25 with tilting, overflows from the upper outlet section 22, and cools the molten corium 13 deposited on the heat resistant material 12. The overflowing water passes a circulation pipe 9, and is returned to the water supply chamber 10. PCOPYRIGHT: (C)2007,JPO&INPIT