2438 プール水中への高温高圧水放出に伴う圧力振動現象

概要

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The water filled containment is studied as a passive safety facility for small nuclear reactors. It is expected that the pressure oscillations occur due to evaporation by decompression boiling and condensation by direct contact with pool water in the water filled containment. The pressure oscillations correspond to that of the vapor condensation phenomena, such as chugging, condensation oscillation (CO) and bubbling. The flashing oscillation resembles chugging. The effect of condensation exceeds the supply of steam, and a vapor bubble formed at outlet of an orifice completely condenses in flashing oscillation. The flashing condition resembles CO. The supply of steam exceeds the effect of condensation, and the condensation of the vapor bubble becomes incomplete. In flashing oscillation region, the large pressure oscillation was observed in the case that the saturated water was discharged into the pool water.
社団法人日本機械学会の論文
2000-07-31