Reactors under construction
Every reactor on the path to its first criticality — under construction, loading fuel, or announced with a target date. For reactors already operating, see the timeline or full directory.
| Reactor | Location | Output | Type | Status | Target criticality | Confidence |
|---|---|---|---|---|---|---|
| Akkuyu-1 | Türkiye | 1,114 MWe | Power reactor | Under construction | 2026 | medium |
| BREST-OD-300 | Russia | 300 MWe | SMR | Under construction | 2026 | low |
| Linglong-1 | China | 100 MWe | SMR | Under construction | 2026 | low |
| Natura MSR-1 | United States | — | Research reactor | Site preparation | 2026 | low |
| Palisades | United States | 800 MWe | Restart | Fuel loaded | 2026 | low |
| Rooppur-1 | Bangladesh | 1,080 MWe | Power reactor | Fuel loaded | 2026 | medium |
| Tianwan-7 | China | 1,171 MWe | Power reactor | Fuel loaded | 2026 | medium |
| Last Energy PWR-5 | United States | 5 MW | Microreactor | Under construction | Q3 2026 | medium |
| Radiant Kaleidos | United States | 1 MW | Microreactor | Under construction | Q3 2026 | high |
| Changjiang-4 | China | 1,000 MWe | Power reactor | Under construction | 2027 | low |
| Crane Clean Energy Center (Three Mile Island Unit 1) | United States | 835 MWe | Restart | Under construction | 2027 | medium |
| Deep Fission Gravity (DB-1) | United States | 15 MWe | SMR | Under construction | 2027 | low |
| Haiyang-3 | China | 1,161 MWe | Power reactor | Under construction | 2027 | medium |
| Haiyang-4 | China | 1,161 MWe | Power reactor | Under construction | 2027 | low |
| Rooppur-2 | Bangladesh | 1,080 MWe | Power reactor | Under construction | 2027 | medium |
| Saeul-4 | South Korea | 1,340 MWe | Power reactor | Under construction | 2027 | low |
| San'ao-2 | China | 1,117 MWe | Power reactor | Under construction | 2027 | low |
| Tianwan-8 | China | 1,171 MWe | Power reactor | Under construction | 2027 | low |
| Xudapu-3 | China | 1,200 MWe | Power reactor | Under construction | 2027 | low |
| Hermes 1 | United States | 0 MW | Research reactor | Under construction | 2028 | low |
| Xudapu-4 | China | 1,200 MWe | Power reactor | Under construction | 2028 | low |
| Duane Arnold Energy Center | United States | 601 MWe | Restart | Under construction | Q1 2029 | medium |
| Ningde-5 | China | 1,200 MWe | Power reactor | Under construction | 2029 | low |
| Darlington New Nuclear Project Unit 1 (BWRX-300) | Canada | 300 MWe | SMR | Under construction | 2030 | medium |
| Hermes 2 | United States | 50 MWe | SMR | Under construction | 2030 | medium |
| Hinkley Point C-1 | United Kingdom | 1,630 MWe | Power reactor | Under construction | 2030 | medium |
| Kemmerer Unit 1 (Natrium) | United States | 345 MWe | Power reactor | Under construction | 2030 | medium |
| Ningde-6 | China | 1,117 MWe | Power reactor | Under construction | 2030 | low |
| Kaiga-5 | India | 630 MWe | Power reactor | Under construction | 2031 | low |
| Palisades Pioneer 1 & 2 (SMR-300) | United States | 300 MWe | SMR | Announced | 2031 | low |
| Shin-Hanul-3 | South Korea | 1,340 MWe | Power reactor | Under construction | 2032 | low |
| Shin-Hanul-4 | South Korea | 1,340 MWe | Power reactor | Under construction | 2033 | low |
| Akkuyu-2 | Türkiye | 1,114 MWe | Power reactor | Under construction | — | low |
| Akkuyu-3 | Türkiye | 1,114 MWe | Power reactor | Under construction | — | low |
| Akkuyu-4 | Türkiye | 1,114 MWe | Power reactor | Under construction | — | low |
| Angra-3 | Brazil | 1,340 MWe | Power reactor | Under construction | — | low |
| Bushehr-2 | Iran | 974 MWe | Power reactor | Under construction | — | low |
| CAREM-25 | Argentina | 25 MWe | SMR | Under construction | — | low |
| Chashma-5 (C-5) | Pakistan | 1,117 MWe | Power reactor | Under construction | — | low |
| Clinch River Unit 1 (BWRX-300) | United States | 300 MWe | SMR | Announced | — | low |
| Darlington New Nuclear Project Unit 2 (BWRX-300) | Canada | 300 MWe | SMR | Site preparation | — | low |
| Darlington New Nuclear Project Unit 3 (BWRX-300) | Canada | 300 MWe | SMR | Site preparation | — | low |
| Darlington New Nuclear Project Unit 4 (BWRX-300) | Canada | 300 MWe | SMR | Site preparation | — | low |
| El Dabaa-1 | Egypt | 1,100 MWe | Power reactor | Under construction | — | low |
| El Dabaa-2 | Egypt | 1,100 MWe | Power reactor | Under construction | — | low |
| El Dabaa-3 | Egypt | 1,100 MWe | Power reactor | Under construction | — | low |
| El Dabaa-4 | Egypt | 1,100 MWe | Power reactor | Under construction | — | low |
| eVinci Nuclear Test Reactor | United States | — | Microreactor | Announced | — | — |
| Hinkley Point C-2 | United Kingdom | 1,630 MWe | Power reactor | Under construction | — | low |
| Jinqimen-1 | China | 1,145 MWe | Power reactor | Under construction | — | — |
| Jinqimen-2 | China | 1,145 MWe | Power reactor | Under construction | — | — |
| Kaiga-6 | India | 630 MWe | Power reactor | Under construction | — | — |
| Khmelnitski-3 | Ukraine | 1,035 MWe | Power reactor | Under construction | — | low |
| Khmelnitski-4 | Ukraine | 1,035 MWe | Power reactor | Under construction | — | low |
| Kudankulam-3 | India | 917 MWe | Power reactor | Under construction | — | low |
| Kudankulam-4 | India | 917 MWe | Power reactor | Under construction | — | — |
| Kudankulam-5 | India | 917 MWe | Power reactor | Under construction | — | — |
| Kudankulam-6 | India | 917 MWe | Power reactor | Under construction | — | — |
| Kursk II-2 | Russia | 1,255 MWe | Power reactor | Under construction | — | low |
| Kursk II-3 | Russia | 1,255 MWe | Power reactor | Under construction | — | — |
| Leningrad II-3 | Russia | 1,199 MWe | Power reactor | Under construction | — | — |
| Leningrad II-4 | Russia | 1,199 MWe | Power reactor | Under construction | — | — |
| Lianjiang-1 | China | 1,224 MWe | Power reactor | Under construction | — | — |
| Lianjiang-2 | China | 1,224 MWe | Power reactor | Under construction | — | — |
| Long Mott Generating Station (Xe-100, 4 units) | United States | 320 MWe | SMR | Announced | — | low |
| Lufeng-1 | China | 1,161 MWe | Power reactor | Under construction | — | — |
| Lufeng-5 | China | 1,116 MWe | Power reactor | Under construction | — | — |
| Lufeng-6 | China | 1,116 MWe | Power reactor | Under construction | — | — |
| NuCube ART Reactor | United States | — | Research reactor | Announced | — | — |
| Ohma-1 | Japan | 1,328 MWe | Power reactor | Under construction | — | low |
| Oklo Aurora-INL | United States | 75 MWe | SMR | Under construction | — | — |
| Oklo Pluto | United States | — | Research reactor | Announced | — | — |
| Paks-5 (Paks II) | Hungary | 1,185 MWe | Power reactor | Under construction | — | — |
| Rajasthan-8 (RAPP-8) | India | 630 MWe | Power reactor | Under construction | — | low |
| San'ao-3 | China | — | Power reactor | Under construction | — | — |
| Sanmen-3 | China | 1,163 MWe | Power reactor | Under construction | — | — |
| Sanmen-4 | China | 1,163 MWe | Power reactor | Under construction | — | — |
| Shidaowan Guohe One 1 | China | 1,400 MWe | Power reactor | Grid connected | — | — |
| Shidaowan Guohe One 2 | China | 1,400 MWe | Power reactor | Under construction | — | low |
| Shimane-3 | Japan | 1,325 MWe | Power reactor | Under construction | — | low |
| Taipingling-3 | China | 1,209 MWe | Power reactor | Under construction | — | — |
| Taipingling-4 | China | 1,209 MWe | Power reactor | Under construction | — | — |
| Terrestrial Energy Project Tetra | United States | — | SMR | Announced | — | — |
| Xiapu-1 | China | 642 MWe | Power reactor | Under construction | — | low |
| Xiapu-2 | China | 600 MWe | Power reactor | Under construction | — | low |
| Xudapu-1 | China | 1,000 MWe | Power reactor | Under construction | — | low |
| Xudapu-2 | China | 1,000 MWe | Power reactor | Under construction | — | low |
| Xuwei-1 | China | 729 MWe | Power reactor | Under construction | — | low |
| Zhangzhou-3 | China | 1,129 MWe | Power reactor | Under construction | — | — |
| Zhangzhou-4 | China | 1,129 MWe | Power reactor | Under construction | — | — |
| Zhaoyuan-1 | China | 1,117 MWe | Power reactor | Under construction | — | — |