EMERGENCY CORE COOLING SYSTEM FOR PRESSURIZED LIGHT WATER REACTOR FOR PREVENTING DRAINAGE OF EMERGENCY CORE COOLING WATER COLD LEG WITHOUT PERFORMING CORE COOLING FUNCTION

摘要

PURPOSE: An emergency core cooling system for pressurized light water reactor is provided to connect a DVI(Direct Vessel Injection) nozzle of a downcomer to a core barrel ring-shaped cylinder by using a water jet method instead of a pipe method. CONSTITUTION: A core barrel ring-shaped cylinder(3) is installed on the same axis as an emergency core cooling water downcomer path at an outer circumference of a core barrel(2) of downcomer(14) in a reactor vessel(1). A plurality of emergency core cooling water inlet(5) is formed at a predetermined position opposite to an emergency core cooling water DVI(Direct Vessel Injection) nozzle(4). An emergency core cooling water mixing promotion outlet(8) is formed at a lower part of the core barrel ring-shaped cylinder.