VT-1 reactor

The VT-1 reactor was the nuclear fission reactor used in a pair to power the SOVIET SUBMARINE K-27 as part of the Soviet Navy's Project 645 Кит-ЖМТ. It is a liquid metal cooled reactor (LMR), using highly enriched uranium-235 fuel to produce 73 MW of power.

K-27 was a November-class submarine first generation nuclear submarine, and the only one of its class fitted with liquid metal cooled reactors. However the seven-member Alfa-class submarine were subsequently fitted with liquid metal cooled reactors. Its usage in the K-27 led to a nuclear incident with 9 fatalities.

It was developed by OKB Gidropress in cooperation with IPPE.