OKB Gidropress has developed the SUROK technical solution for the VVER-600S

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AtomInfo.Ru, PUBLISHED 20.10.2026

OKB Gidropress, part of Rosatom's engineering division, has developed the SUROK (marmot; melt retention system with reactor vessel cooling) technical solution, which is planned to be implemented at the new power units of Kola NPP-2 with VVER-600S reactors.

The solution concerns a system for retaining melt inside the reactor vessel. In the future, it may be applied in the construction of all new NPP power units with medium- and large-capacity VVER reactors.

Recall that AtomInfo.Ru previously published an article by OKB Gidropress specialists on the safety concept of the VVER-I reactor plant project, which, among other things, mentioned the SUROK system for a small VVER.

Topics: OKB Gidropress, Rosatom, Safety

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