SAFETY INJECTION TANK SYSTEM PRESSURIZED WITH SEPARATED NITROGEN GAS TANK

摘要

The present invention relates to a safety injection tank system which separates an emergency core cooling water tank with a nitrogen gas tank. According to the present invention, nitrogen gas and emergency core cooling water are received in a same tank. The nitrogen gas dissolves in the emergency core cooling water during operation standing-by. The nitrogen gas is injected into a nuclear reactor system and disturbs the formation of heat transmission and heat exchange natural circulation loops. The present invention prevents the dissolution of nitrogen gas by solving a disadvantage of a traditional integrated safety injection tank system which can be applied to a low pressure accident. The present invention provides a safety injection tank system which is pressurized with a nitrogen gas tank which can be applied to nuclear reactor system pressure environments of low pressure large pipe break and high pressure small pipe break accidents by dividing the pressure of the nitrogen gas tank into a high pressure and a low pressure.