0605 Experiments and Analytical Simulation Work on An Innovative Steam-Injector-Driven Passive Core Injection System

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  • 0605 革新的蒸気インジェクタ駆動静的炉心注水システムの実験と解析評価(S45-1 原子炉システムおよびその要素技術(1),S45 原子炉システムおよびその要素技術)

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A Steam Injector (SI) is a simple, compact and passive pump which also functions as a high-performance direct-contact compact heater. We are developing this innovative concept by applying the SI system to core injection system in emergency core cooling systems (ECCS) to further improve the safety of nuclear power plants. Passive ECCS in nuclear power plants would be inherently very safe and would prevent serious accidents by keeping the core covered with water (Severe accident-free concept). The passive core injection system driven by a high-efficiency SI is one that, in an accident such as a loss of coolant accident (LOCA), attains a higher discharge pressure than the supply steam pressure used to inject water into the reactor by operating the SI using water stored in the pool as the water supply source and steam contained in the reactor as the source of pressurization energy. This report describes the experiments and the analytical simulation work on an innovative SI-driven passive core injection system.

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