PASSIVE COOLING DEVICE OF REACTOR CAVITY

摘要

The present invention relates to a passive cooling device of a reactor cavity. Air flow for cooling is increased by enlarging a total duct flow path cross section while maintaining total heat by an integrated pin duct method. Also, the passive cooling efficiency of a reactor cavity can be improved by improving heat exchange efficiency with air by a heat radiation pin formed in the duct. Also, an insulating material installed on the back side of an existing air duct is removed or a heat shielding body of the outer wall of the reactor cavity is completely or partly removed by using a light insulating material. Soil touching the outer side of a concrete silo can be ultimately used as a secondary thermal probe, thereby providing a natural cooling unit through the outer wall of the reactor cavity when all rector core residual heat removing units are lost, and basically preventing the fatal cooling uncontrollability of the reactor.