PWR-20 (OPEN-20)
US
Basics
Reactor Type
Pressurised Water Reactor
Reactor Description
Loop operated PWR
Electric Output (MWe)
22
Thermal Output (MWt)
40
Size
Small
Spectrum
Thermal
Developer
Last Energy Inc.
Pilot Site Details
N/A
Details
Use (goal of commercial operation)
electric power generation
Deployment medium
Land-Based
Design Lifetime (Years)
40
Fuel
Fuel class
LEU
Fuel Type
UO2 Pellets
Fuel Cycle
Open
Cooling & Temperature
Reactor cooling of primary loop
Light Water
Reactor moderator
Light Water
Reactor Outlet Temperature (°C)
312
Status
Design status
Detailed Design
Licensing status
- 2022 - Completed detailed...
- 2022 - Completed detailed design
- 2021 - Pre-conceptual design completed for 20-MW plant
Deployment timeline
- 2027 - Targeted assembly line...
- 2027 - Targeted assembly line manufacturing
- 2027 - First power at former coal plant site in Bridgend, south Wales
Agreements and Engagement
- Oct 2024 - Last Energy (Project...
- Oct 2024 - Last Energy (Project Quantum) selected among nine projects for support under EU SMR industrial alliance. Selection doesn’t mean funding but allows collaboration between SMR developers, regulators, and supply chain
- Oct 2024 - Last Energy UK subsidiary revealed plans to build £300m (€359m, $391m) micro nuclear project in Wales
- Mar 2023 - Last Energy said it had power purchasing agreements for 34 SMRs in Poland and UK
- Early 2023 - Enea cancelled letter of intent with LastEnergy
- Jul 2022 - MoU signed with Poland's Legnica special economic zone for deployment of up to 10 units
- Jun 2022 - Letter of intent signed with Poland's utility Enea for potential deployment
- Mar 2022 - MoU signed with Poland's Katowice special economic zone
- Mar 2022 - Romanian PM announced Last Energy will build a demonstrator with Romania's 'RATEN in Mioveni
- In 2020 - Launch of OPEN100 (open source 100-MW PWR) for technical and economic validation
