海水塩析出物を伴う伝熱面の限界熱流束状態発生機構に関する研究

抄録

Seawater pool nucleate boiling heat transfer experiments with deposited sea salts on a heat transfer surface was conducted, in order to understand effects of the deposited sea salt on boiling heat transfer for seawater in reactor cores in the accident at the Fukushima Daiichi Nuclear Power Station. The present study indicated that a heat transfer surface temperature excursion occurred at a certain heat flux for seawater boiling because the deposited sea salt layer became thick, and then a thermal resistance. Finally, burn-out of the heat transfer surface occurred when the temperature reached the melting point of the heat transfer surface by the increase of the thermal resistance of the deposited sea salt. The phenomenon was a peculiarly seawater boiling phenomenon. The burn-out mechanism was different from that for the pure water.