OK-650 reactor

This pressurized water reactor (PWR) uses 20-45% enriched uranium-235[2] fuel to produce 190 MW of thermal power.

Developed during the 1970s, these reactors were designed with the aim of minimizing accidents and malfunctions.

Monitoring subsystems, designed for rapid detection of leaks, were included, along with newer-generation emergency cooling systems for the main reactor core.

[3] The reactor is now also used to power the new Project 955 Borei submarines.

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