In case of emergency
"Sevmorput" is powered by a single KLT-40 nuclear fission reactor with a thermal output of 135 megawatts. The reactor core contains of 30–40- or 90-percent enriched uranium in uranium-zirconium alloy and has reportedly required refueling only twice. The nuclear power plant on board the vessel produces 215 tons of steam per hour at a pressure level of and temperature of . In case of emergency steam can also be produced by a diesel-powered boiler (50 t/h, 2,450 kPa, 360 °C).