Editing Sevmorput (section)

===Power and propulsion===

''Sevmorput'' is powered by a single [[KLT-40]] [[nuclear fission reactor]] with a thermal output of 135 megawatts. The reactor core contains {{convert|150.7|kg|lb}} of 30–40- or 90-percent<ref group="note" name="note1">90 % according to information provided to Norwegian government in 1990, 30–40 % according to [[Bellona Foundation]] citing communication with [[Murmansk Shipping Company]]. (Diakov, Anatoli C. et al.)</ref> enriched uranium in uranium-zirconium alloy<ref name="klt40">{{Citation| last1=Diakov| first1=Anatoli C.| last2=Dmitriev| first2=Alexander M.| last3=Kang| first3=Jungmin| last4=Shuvayev| first4=Alexey M.| last5=von Hippel| first5=Frank N.| display-authors=1|year=2006|pages=33–48|title=Feasibility of Converting Russian Icebreaker Reactors from HEU to LEU Fuel|journal=Science and Global Security|volume=14| issue=1|publisher=Taylor & Francis, Inc.
|url=http://www.armscontrol.ru/pubs/en/heu-leu-reactors-sgs.pdf|access-date=2011-11-26| doi=10.1080/08929880600620575| bibcode=2006S&GS...14...33D| s2cid=56235901}}
</ref> 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 {{convert|40|atm|MPa|abbr=on}} and temperature of {{convert|290|C|F|abbr=on}}. In case of emergency steam can also be produced by a diesel-powered boiler (50 t/h, 2.45 MPa, 360&nbsp;°C).<ref name="rosatom_specs" />

Unlike the Russian [[Arktika-class icebreaker|''Arktika'']]- and [[Taymyr (1987 icebreaker)|''Taymyr'']]-class nuclear-powered icebreakers, which have three fixed-pitch propellers and utilize nuclear-turbo-electric powertrain, ''Sevmorput'' is propelled by a single 4-bladed [[ducted propeller|ducted]] [[Variable-pitch propeller (marine)|controllable-pitch propeller]] mechanically coupled to a GTZA 684 OM5 [[steam turbine]] which has a maximum output of {{convert|29420|kW|hp|abbr=on}} and turns the {{convert|6.7|m|ft|adj=on}} propeller at 115 rpm. At full power the propulsion system gives the ship a maximum speed of {{convert|20.8|kn}} at a draught of {{convert|10|m|ft}}. She can also maintain a speed of {{convert|2|kn}} in {{convert|1|m|ft|adj=on}} thick level ice.<ref name="rosatom_specs" />

For electricity production ''Sevmorput'' has three 1,700&nbsp;kW [[turbogenerator]]s and three 2,000&nbsp;kW standby diesel generators. In addition in case of [[power outage|blackout]] the vessel also has two 200&nbsp;kW emergency diesel generators.<ref name="rosatom_specs" />