Chubu Electric's Hamaoka 1 and 2 BWRs, closed in 2009 over seismic upgrade costs, are the first Japanese commercial reactors to reach the reactor-dismantling stage. Unit 2's reactor dismantling began in March 2025 and Unit 1's in October 2025; Chubu expects to finish in fiscal 2042.
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Current state
| Status | Active dismantling |
| Country | Japan |
| Location | Omaezaki, Shizuoka Prefecture |
| Site | Hamaoka |
| Units | Unit 1, Unit 2 |
| Unit count | 2 |
| Reactor types | BWR |
| Owner / licensee | Chubu Electric Power |
| Strategy | Immediate dismantling |
| Final shutdown | 2009-01 |
| Decommissioning start | 2009-11 |
| Target completion | 2042 |
| Notable issue | First commercial reactors in Japan to enter the reactor-dismantling stage. |
Notes
Gross capacities 540 + 840 MWe per WNN (net not given).
Timeline
- 2009-01 — Chubu decided to close both units rather than upgrade to new seismic standards. (source)
- 2009-11 — METI approved the four-stage plan and Stage 1 began. (source)
- 2024-12-18 — The NRA approved moving to Stage 3 (reactor dismantling). (source)
- 2025-03-17 — Chubu removed Unit 2's pressure vessel upper lid, starting reactor dismantling. (source)
- 2025-10-10 — Chubu reported removing Unit 1's pressure vessel lid as reactor dismantling began. (source)
The timeline is append-only: corrections are added as new entries. Stated targets appear in the current-state table, never as milestones.
Related sites
- Biblis Nuclear Power Plant (Units A and B) Active dismantling · Germany
- Brokdorf Nuclear Power Plant (KBR) Active dismantling · Germany
- Brunsbüttel Nuclear Power Plant (KKB) Active dismantling · Germany
- Chinshan Nuclear Power Plant Fuel removal · Taiwan
- Chooz A Active dismantling · France
- Crystal River Unit 3 Site restoration · United States
- Doel Nuclear Power Plant (Units 1-3) Shut down · Belgium
- Dounreay (DFR and PFR fast reactors) Active dismantling · United Kingdom
See all 72 sites in the Nuclear Decommissioning Tracker →
Sources
- Dismantling of Hamaoka 1 reactor under way — World Nuclear News, checked 2026-10-11
- Hamaoka Nuclear Power Station Units 1 and 2 Entering ... — Chubu Electric Power (primary), checked 2026-10-11