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Small Modular And Advanced Reactor Database

Total number of countries

19

Under construction

0

In operation

0

Conceptual design

0

Preliminary design

0

Basic design

0

Detailed design

0

Distribution by country of origin

US 38
Russia 17
China 10

Distribution by size

Small 23
Large 21
Medium 14

Distribution by electric output

No electric power 19
1 - 10 10
11 - 50 15

Distribution by thermal output

1 - 200 50
201 - 400 17
401 - 600 13

Distribution by fuel class

HALEU 56
LEU 47
MOX 14
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Showing 112 results
Name
Country
Reactor type Size
Electric Output (MWe)
Thermal Output (MWt)
Spectrum
Fuel class
Last Updated
MMR US Gas Cooled Reactor Micro 5 - 10 15 - 30 Thermal HALEU 06 Apr 2026
THORIZON Netherlands Molten Salt Reactor Small, Medium 40 - 120 100 - 300 Thermal, Fast Spent Nuclear Fuel, Thorium 17 Apr 2026
NUWARD France Pressurised Water Reactor Medium, Large 2 x 170 2 x 540 Thermal LEU 21 Apr 2026
Kaleidos US Gas Cooled Reactor Micro 1 2 Thermal HALEU 23 Apr 2026
Stellarium (Alvin) France Molten Salt Reactor Medium 110 250 Fast HALEU 28 Apr 2026
Rolls-Royce SMR UK Pressurised Water Reactor Large 470 1358 Thermal LEU 29 Apr 2026
ARC-100 Canada Liquid Metal Reactor Small 100 286 Fast HALEU 29 Apr 2026
Kairos Hermes 1 US Molten Salt Reactor No electric power non-power 35 Thermal HALEU 04 May 2026
KP-FHR (Kairos) US Molten Salt Reactor Medium 140 320 Thermal LEU, MOX, Thorium 04 May 2026
BWRX‑300 US Boiling Water Reactor Large 300 870 Thermal LEU 05 May 2026
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