LDR-50
Finland
Basics
Reactor Type
Pressurised Water Reactor
Pressurized (light) water reactor
Primary heat transport: H2O - so-called light (normal) water
Primary heat transport: H2O - so-called light (normal) water
Reactor Description
Integral PWR
PWR with primary cooling loops in same vessel
Core, primary loop, steam generator in the same vessel
Core, primary loop, steam generator in the same vessel
Electric Output (MWe)
non-power
Thermal Output (MWt)
10 - 50
Size
No electric power
Spectrum
Thermal
Kinetic neutron energy of 0.000…0.025 eV
Slow or cold neutron / moderated neutron spectrum
Slow or cold neutron / moderated neutron spectrum
Developer
Steady Energy; VTT
Pilot Site Details
N/A
Details
Use (goal of commercial operation)
low-temperature heat generation for district heating
Deployment medium
Land-based
Design Lifetime (Years)
60
Fuel
Fuel class
LEU
Low enriched uranium
Uranium enriched to less than 5 percent U-235
Uranium enriched to less than 5 percent U-235
Fuel Type
UO2 Pellets
Uranium dioxide
Most often used uranium compound for fuel elements
Most often used uranium compound for fuel elements
Fuel Cycle
Open
Refuelling Cycle
N/A
Cooling & Temperature
Reactor cooling of primary loop
Light Water
Deuterium-depleted water
Containing the natural proportion (or less) of deuterium oxide, i.e. about 0.02 percent
Containing the natural proportion (or less) of deuterium oxide, i.e. about 0.02 percent
Reactor moderator
Light Water
Deuterium-depleted water
Containing the natural proportion (or less) of deuterium oxide, i.e. about 0.02 percent
Containing the natural proportion (or less) of deuterium oxide, i.e. about 0.02 percent
Reactor Outlet Temperature (°C)
155
Status
Design status
Detailed design
Licensing status
- Since Aug 2024: Preliminary...
- Since Aug 2024: Preliminary assessment by Finnish radiation and nuclear safety authority STUK
- In 2020: LDR-50 development began at the VTT Technical Research Centre of Finland
Deployment timeline
Target deployment in early 2030s
Agreements and Engagement
- Dec 2024 - Company contracted...
- Dec 2024 - Company contracted Tractebel to provide engineering services for the development of the LDR-50, with aim to advance the reactor's design and licensing process
- Oct 2024 - Signed agreement with Keravan Energia to explore the implementation of SMR technology for district heating in Kerava, Finland
- Aug 2024 - Signed a one-year pre-planning agreement with Kuopion Energia to develop a nuclear heating plant in Kuopio, Finland
- Apr 2024 - Entered into a collaboration with TVO Nuclear Services to leverage TVO's expertise in nuclear power plant projects
