The water treatment facility required to product chemically demineralized water for the 2nd VVER-1200 power block under construction has been successfully tested at the Leningrad NPP-2 site.

According to the Leningrad NPP-2 chemical hall team, the water treatment facility will be launched until the end of September. The water from it will be required for the circulation cleaning of the primary circuit reactor facility at the 2nd power block under construction.

During the production run, the water will be used to fill in the block’s primary and secondary circuits connecting the primary equipment of the reactor and the turbine facilities for boosting, airing, cooling, deactivation, regeneration, etc.

‘As we are chemists, our primary consideration with regard to the power block’s safety is water treatment. The source natural water coming to us from the Gulf of Finland has lots of impurities. The water treatment facility cleans it from seaweed, sand, bacteria, and saline, which gives us almost perfect substance. If we use this water, we can avoid the construction materials corrosion and any sediments at the equipment and pipeline surfaces, which means their life span can be extended without compromising their heat-transfer properties. High quality reclaimed water facilitates continuity of the process loop safety barriers’, Sergey Dmitriev, the head of the chemical hall at the Leningrad NPP, said.

‘The water treatment facility will provide 90 cubic meters of chemically demineralized water per hour. This is comparable to a pond with the dimensions of 5 x 8 x 2 meters filled with perfectly clean water every hour’, Andrey Stetsiuk, the lead engineer of the chemical hall, said.