Hamaoka nuclear power plant 4
Mothballed Japan
Gross capacity
1,137MW
Hamaoka nuclear power plant 4 is a boiling water reactor unit at Hamaoka nuclear power plant in Japan rated at 1,137 MW gross. It is mothballed. Commercial operation began 3 Sep 1993.
Specification
| Reactor type | Boiling water reactor (BWR) |
|---|---|
| Model | BWR-5 |
| Size class | Large |
| Coolant | Light water |
| Moderator | Light water |
| Gross capacity | 1,137MW |
| Net capacity (reference) | 1,092MW |
| Net capacity (design) | 1,092MW |
| Thermal output | 3,293MWt |
| Typical enrichment | 3–5% U-235 |
Ownership & location
| Site | Hamaoka nuclear power plant |
|---|---|
| Unit | 4 |
| Country | Japan |
| Owner | Chubu Electric Power Co Inc100% |
| Operator | Chubu Electric Power |
| Coordinates | 34.6235, 138.1421 |
Fuel chain for this unit
Fuel form
Uranium dioxide pellets in zirconium-alloy cladding
Enrichment
3–5% U-235
Who makes this assembly
- Framatome BWR fuel assemblies
- Global Nuclear Fuel BWR fuel assemblies
- Westinghouse Electric Company BWR fuel assemblies
Upstream
Enriched fuel means this unit sits downstream of five conversion plants and four enrichment operators holding 88% of world capacity between the top three.
Fabricator capability is recorded against reactor type and model line, not against named units —
utilities do not publish fuel contracts. See the fuel chain.
Timeline
- 13 Oct 1989Construction start
- 2 Dec 1992First criticality
- 27 Jan 1993Grid connection
- 3 Sep 1993Commercial operation
Other units at Hamaoka nuclear power plant
| Unit | Status | Gross MW |
|---|---|---|
| Hamaoka nuclear power plant 1 | Retired | 540 |
| Hamaoka nuclear power plant 2 | Retired | 840 |
| Hamaoka nuclear power plant 3 | Mothballed | 1,100 |
| Hamaoka nuclear power plant 5 | Mothballed | 1,380 |
| Hamaoka nuclear power plant 6 | Shelved | 1,400 |
Other BWR-5 units
20 units worldwide share this model designation.
| Unit | Country | Status | Gross MW |
|---|---|---|---|
| Laguna Verde nuclear power plant 1 | Mexico | 805 | |
| Laguna Verde nuclear power plant 2 | Mexico | 803 | |
| Onagawa nuclear power plant 2 | Japan | 825 | |
| Shimane nuclear power plant 2 | Japan | 820 | |
| Fukushima Daiichi nuclear power plant 6 | Japan | Retired | 1,100 |
| Fukushima Daini nuclear power plant 1 | Japan | Retired | 1,100 |
| Fukushima Daini nuclear power plant 2 | Japan | Retired | 1,100 |
| Fukushima Daini nuclear power plant 3 | Japan | Retired | 1,100 |
| Fukushima Daini nuclear power plant 4 | Japan | Retired | 1,100 |
| Hamaoka nuclear power plant 3 | Japan | Mothballed | 1,100 |
| Higashidori (Tohoku) nuclear power plant 1 | Japan | Mothballed | 1,100 |
| Kashiwazaki Kariwa nuclear power plant 1 | Japan | Mothballed | 1,100 |
Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release — CC BY 4.0 · retrieved 2026-09-06 · this unit last researched by GEM on 2026-06-24
- GEM.wiki entry (further reading) — CC BY-SA 4.0 — linked, not quoted