The RITM-200 is an integrated generation 3+ pressurized water reactor developed by OKBM Afrikantov and designed to produce 55 MWe. The design is an improvement of KLT-40 reactor. It uses up to 20% enriched uranium-235 and can be refueled every 10 years for a 60 year planned lifespan in floating power plant installation.[1] If installed in a stationary power plant the fuel cycle is 6 years.

GenerationGeneration III+ reactor
Reactor conceptPressurized water reactor
Reactor typesRITM-200
RITM-400 project
Main parameters of the reactor core
Fuel (fissile material)235U (LEU)
Fuel stateSolid
Neutron energy spectrumThermal
Primary control methodControl rods
Primary moderatorWater
Primary coolantLiquid (light water)
Reactor usage
Primary useGeneration of electricity and propulsion
Power (thermal)RITM-200: 175  MWth
RITM-400: 315  MWth
Power (electric)RITM-200: 55  MWe
RITM-400: 120  MWe

The RITM-200 has a compact integrated layout placing equipment within the steam generator casing, halving system weight compared to earlier designs and improving ability to operate in rolling and pitching seas.[2]

It powers the Project 22220 icebreakers, the first of which went critical in October 2019[3] and entered service in 2020, and the proposed Project 23000E supercarrier.[4]

In November 2020 Rosatom announced plans to place a land-based RITM-200 SMR in isolated Ust-Kuyga town in Yakutia.[5] The reactor will replace current coal and oil based electricity and heat generation at half the price.[6]


  1. ^ "Small nuclear reactors for power and icebreaking".
  2. ^ "Ural icebreaker passes construction milestone". World Nuclear News. 1 August 2018. Retrieved 3 August 2018.
  3. ^ "SMR in the Making". Retrieved 2020-05-05.
  4. ^ "A new aircraft carrier of the Russian Navy will be equipped with a nuclear reactor RITM-200 - source". Retrieved 27 March 2018.
  5. ^ "Rosatom plans first land-based SMR for Russian Far East : New Nuclear - World Nuclear News". www.world-nuclear-news.org. Retrieved 2020-11-11.
  6. ^ "Rosatom to begin work on land-based SMR - Nuclear Engineering International". www.neimagazine.com. Retrieved 2021-01-06.

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