Nuclear Risk Watch · Facility Report
Hamaoka Nuclear Power Plant
Japan · Chubu Electric Power · nuclear power plant · operational · 3,504 MW installed
34.624, 138.143 · generated 2026-11-12 20:22:10 UTC
Current external hazard exposure
LOW · 7.4/100
Earthquake 58 km from Hamaoka Nuclear Power Plant, 5 d ago (severity 30%, distance factor 0.68, recency 0.31) plus 2 other active hazards → exposure LOW (7.4/100).
Baseline: this exposure is at or above 67% of the 398 observations recorded for this facility since 2026-08-14 · highest recorded 22.8/100.
Facility impact: no operational effect has been confirmed in the public sources reviewed.Exposure measures external hazard conditions near the site; it is not an assessment of plant engineering safety.
Nearby active hazards (in range)
| Type | Source | When (UTC) | Distance |
|---|---|---|---|
| EARTHQUAKE M5.5 | USGS | 2026-11-07 16:04 | 58 km |
| EARTHQUAKE M4.7 | USGS | 2026-11-10 06:36 | 189 km |
| EARTHQUAKE M4.5 | USGS | 2026-11-12 13:27 | 248 km |
Recent exposure history
- 2026-11-12 19:04 · LOW 7.4
- 2026-11-12 16:03 · LOW 7.6
- 2026-11-12 13:02 · LOW 7.3
- 2026-11-12 11:03 · LOW 7.4
- 2026-11-12 09:04 · LOW 7.6
- 2026-11-12 06:02 · LOW 7.8
- 2026-11-12 03:03 · LOW 8.0
- 2026-11-12 01:03 · LOW 8.2
How this score is calculated
External hazard exposure (0–100) combines four factors: hazard type, severity, proximity to the site and recency — higher when a serious hazard is close and recent. It does not incorporate facility vulnerability or consequence. Full methodology.
LOW 0–20MODERATE 20–40ELEVATED 40–60HIGH 60–80SEVERE 80–100