Tsuruga Unit 1

Tsuruga 1, a 341 MWe BWR that began commercial operation in 1970 as one of Japan's first, ended operation on 27 April 2015 and has been in decommissioning since May 2017. Its sister Unit 2 was refused a restart by the regulator in 2024 over an active fault.

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Current state

Notes

Capacity 341 MWe per WNA. Commercial-operation date (14 Mar 1970) read from JAPC timeline layout — medium confidence.

Timeline

• 1970-03-14 — Tsuruga 1 began commercial operation. (source)
• 2015-04-27 — Operation of Tsuruga 1 was terminated. (source)
• 2017-05-15 — Decommissioning of Tsuruga 1 started. (source)
• 2024-07-26 — A Japanese regulator panel decided against restarting neighbouring Tsuruga 2. (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

1. An Overview | The Japan Atomic Power Company — Japan Atomic Power Company (primary), checked 2026-10-11
2. Nuclear Power in Japan — World Nuclear Association, checked 2026-10-11
3. Japan nuclear watchdog panel decides against restarting Tsuruga reactor — Reuters, checked 2026-10-11