Experience of commissioning of the V-392M reactor plant passive heat removal system

During the commissioning stage of Novovoronezh NPP II's unit 1, following an update of the equipment design, the PHRS proved to be indispensible as the means to remove the reactor core heat in conditions of an unexpected scram and has confirmed its efficiency as part of an integrated test at 75% of the reactor power. The PHRS heat exchanger total heat removing capacity was over 100 MW at the ambient air temperature of -13 °C, and the time for the PHRS to reach full capacity did not exceed 90s, which corresponds to the system's design performance.