en.Wedoany.com Reported - Unit 4 of Russia's Kalinin Nuclear Power Plant will be shut down on May 9, 2026, to commence planned maintenance work.

The unit, which employs VVER-1000 reactor technology, is one of three units at the Kalinin plant scheduled for maintenance this year. The plant management stated that this round of maintenance aims to ensure equipment reliability, enhance unit performance, and advance the modernization of related systems.

During the maintenance period for Unit 4, plant specialists will collaborate with employees of Atomenergomash JSC to complete approximately 15,000 tasks, including nuclear fuel reloading, preventive maintenance of the reactor and turbine generator set, metal condition monitoring, and diagnostics of 8,500 heat exchange tubes across two steam generators. Furthermore, the unit will undergo multiple modernization upgrades involving critical facilities such as the primary circuit emergency cooling system, the reliable power supply system, and the automatic water fire suppression system. An estimated 2,000 personnel are expected to participate in this maintenance operation.

In a mobilization address, Kalinin Nuclear Power Plant Director Viktor Ignatov (Виктор Игнатов) pointed out that the plant's stable operation directly depends on the quality of maintenance and adherence to regulations. He emphasized that although last year's experience showed there is room to optimize maintenance time, this must never come at the expense of safety. Work must be carried out under strict compliance with production standards and occupational safety protocols, and the final outcome rests on the personal responsibility of every individual involved.

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