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    • 67. 发明专利
    • JPH05297177A
    • 1993-11-12
    • JP9936692
    • 1992-04-20
    • TOSHIBA CORP
    • KASAHARA FUMIOKATO MASAMIARAI KENJIKATAOKA KAZUYOSHI
    • G21C1/00G21C15/18G21D5/14
    • PURPOSE:To keep the healthiness of a fuel element at abnormal transition by providing a descending piping for introducing the vapor generated in a superheated vapor heating part to an emergency condenser to condense the vapor and leading the resulting conden sate to a saturated vapor generating part. CONSTITUTION:The vapor generated by a saturated steam generating part (BWR) is introduced into a superheated vapor heating part (SHR) 2 through a double pipe 3. The vapor is partly guided to a condenser 7 and partly sent to a suppression pool 5 by opening a release valve 9. The vapor introduced to the condenser 7 is condensed there, returned to the BWR 1 through a descending piping 11, evaporated again, and circulated. A cooling water is supplied to the BWR 1, with a condensate storing tank 15 or the pool 5 as water source, through a high pressure water injecting system 12, a low pressure water injecting system 13, and a cooling system 14 at unclear reactor isolation. By the supplement of the cooling water, the cooling of the BWR 1 at an abnormal transitional accident is ensured. On the lower stream of the SHR 2, an accumulating water supply system 16 is provided and used when the ensuring of the cooling water source from the BWR1 is difficult.