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NuScale vs Rolls-Royce SMR vs X-energy vs GE Hitachi BWRX-300

SMR Design Comparison

Comparison of the 4 leading SMR designs — power output, fuel type, cooling, regulatory status, and deployment timeline.

NuScaleRolls-RoyceX-energyBWRX-300

📋 Full Specification Comparison

Specification NuScaleRolls-RoyceX-energyBWRX-300
Power Output 77 MWe/module 470 MWe 80 MWe/module 300 MWe
Reactor Type PWR (LWR) PWR (LWR) HTGR BWR
Fuel UO2 <4.95% UO2 <5% TRISO pebbles UO2 <5%
Coolant Water Water Helium Water
Design Certification NRC certified UK GDA NRC pre-app NRC pre-app
First Deployment Delayed (2029) 2030 (UK) 2028 (Dow Chemical) 2028 (Canada)
Modules per Site 4-12 1 4-12 1

⚖️ Expert Verdict

GE Hitachi BWRX-300 is the first SMR under construction in Canada; X-energy offers HTGR with TRISO fuel; NuScale overcame cost overruns; Rolls-Royce targets UK grid by 2030.

🔍 Subject Breakdown

NuScale

0 Category Wins

Rolls-Royce

0 Category Wins

X-energy

0 Category Wins

BWRX-300

1 Category Wins
  • ★ First Deployment: 2028 (Canada)

📊 Search Interest & Popularity

72%