SHUTDOWN COOLING SYSTEM OF REACTOR

摘要

PURPOSE: A shutdown cooling system of a reactor is provided to obtain inner integrity of a shutdown cooling system and purify water without passing through unnecessary equipments or valves. CONSTITUTION: A shutdown cooling system(110) pumps a cooling water introduced through a valve from an IRWST and a cooling water of the first system(SC LINE). A shutdown cooling heat exchanger(120) receives water output from the shutdown cooling pump(110) through valves(SI-7,SI-8) and sends the same to a safety injection nozzle inside a containment vessel through a valve(SI-11), an orifice(121) and a valve(SI-12). A pump recycling orifice(131) receives the water output from the shutdown cooling pump(110) and sends the same to an input end of the pump. A spray system connecting valve(SI-5) sends a shutdown cooling water to a containment vessel spray system. A spray system connecting valve(SI-9) introduces a cooling water from the containment container spry system to a front end of the shutdown cooling heat exchanger(120). The cooling water introduced from the IRWST is connected to the spray system connecting valve(SI-5). An output of the orifice of the output end of the shutdown cooling heat exchanger(120) is connected to the IRWST through valves SI-14 and SI-15 to perform a maximum capacity test during a normal drive which is not a shutdown cooling mode.