Passive heat removal system successfully tested

12 September 2017

On the 29th of August the tests of one of the most important protective safety systems – passive heat removal system from the reactor through steam generators – were completed at Unit 1 of Leningrad NPP under construction.

The work was carried out at the stage of the hot runs of the equipment which included main and auxiliary process system of normal operation and safety system. Hot runs are the last large start-up and adjustment stage before commissioning of the unit.

The passive heat removal system through steam generators is designed for removal of residual heat and cooldown of the reactor in case of beyond design basis accidents associated with plant blackout or total loss of feedwater. The main feature of this system is its complete independence. Production capacity of the system is such that three of four independent trains are capable to provide for prolonged residual heat removal from the reactor core during one day, as minimum. At present, all four trains of the system have been successfully tested at Leningrad NPP.

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