H213 二相流エジェクタによる無電源軽水炉緊急時炉心冷却系の理論解析(OS-11:沸騰・二相流(5))

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  • H213 Analysis of the Emergency Core Cooling System without Electric Power by using the Two-phase Flow ejector

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The new concept of emergency core cooling system without electric power supply is hoped after the accident at the first FUKUSHIMA power plant. The large earthquakes and the tremendous tsunami waves out of our prediction break down all electrical resources including the auxiliary power supply. The stopping process of atomic reactor was success, but the core cooling and the emissions enclosing process were failed. The present paper proposes the new emergency core cooling system without electric power by using the super-sonic two-phase flow ejector. The proposed system has two important features. One is that this system never bents out the radioactive steam into the surroundings. This function is completed by the super-sonic ejector. Both the driving and the sucked flows of the ejector can be compressed and flow back into the high pressure core-vessel. The other is that this system works without power by using the energy of the steam at high temperature. The paper shows the thermodynamics theory of the ejector system.

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