Akademik Lomonosov

Executive Overview

The Akademik Lomonosov is the world's first operational floating nuclear power plant (FNPP), developed by Rosatom and moored in Pevek, Chukotka, in Russia's Far East. Construction began in April 2007; the hull was launched in June 2010; the vessel arrived at Pevek in September 2019; grid connection occurred December 19, 2019; and full commercial operation began May 22, 2020. The plant comprises two KLT-40S pressurised water reactor units (35 MWe / 150 MWth each), giving 70 MWe total electrical capacity. As of approximately 2025, the plant had supplied over 1 billion kWh of electricity since commissioning and currently supplies approximately 60% of the energy for the western Chukotka region and the city of Chersky in Yakutia, serving Pevek (population approximately 5,000) and enabling mining development in the Baimskaya ore zone. The FNPP replaces the 36 MW Bilibino Nuclear Power Plant and the 34 MW Chaunskaya co-generation plant. The 10-year operating licence covers the plant through 2029; designed operational life is 40 years (extensible to 50). The KLT-40S design draws on over 400 reactor-years of safe operation experience in Russian nuclear icebreakers.

How It Works & Differentiation

The KLT-40S is a low-enriched uranium pressurised water reactor (less than 20% U-235) with 121 fuel assemblies per core, a refuelling interval of three years, and an operating pressure of 12.7 MPa. The non-self-propelled barge (144 m long, 30 m wide, 21,000 tonne displacement) is towed to its deployment site, moored, and connected to onshore power transfer facilities. The floating design allows deployment in geographically remote or seismically challenging locations that cannot support conventional land-based nuclear plants, and enables relocation at end of licence. Heat output is up to 50 Gcal/hour, supporting district heating for Pevek. The annual load factor has varied significantly: 2022 load factors were approximately 26–30%; 2023 improved to approximately 43% for one unit, producing 121.54 GWh that year.

Commercialization & Traction

Rosatom is constructing four additional floating power units with RITM-200M reactors (up to 100 MWe capacity, 60-year service life) and is actively marketing the floating nuclear platform for export. Total project cost was estimated at over $740 million for 70 MW of capacity — substantially above initial projections — reflecting first-of-a-kind construction complexity. The KLT-40S is one of only two commercially operational SMR designs globally (alongside China's HTR-PM); its operational data are the primary real-world reference for floating SMR performance and cost.

Scalability & Strategic Context

The Akademik Lomonosov demonstrates that floating nuclear power plants can be constructed, towed across thousands of kilometres (4,700 km from Murmansk to Pevek), and operated continuously in Arctic conditions. The relatively low load factors in early years reflect the phased transition from backup to primary grid supply as Bilibino and Chaunskaya were progressively decommissioned. The next generation RITM-200M floating units will carry twice the electrical capacity of the KLT-40S, and Rosatom's 40-year commercial nuclear icebreaker operational record gives the programme a unique safety and engineering pedigree unavailable to any other floating nuclear developer.