Clinch River Nuclear Unit 1 (BWRX-300) construction permit: NRC construction permit review for Tennessee Valley Authority — issued, 14.7 months from docketing to decision. Sourced dates and schedule.

Background: NRC reactor licensing process, explained · The ADVANCE Act, explained: what changed and where the NRC stands

Current state

Type	Construction permit
Outcome	Issued
Applicant	Tennessee Valley Authority
Facility	Clinch River Nuclear Site, Unit 1 (Roane County / Oak Ridge, Tennessee)
Docket	50-615
Submitted	2025-05-20
Docketed (accepted for review)	2025-07-09
NRC planned schedule	17 months
NRC target date	—
Final safety evaluation	2026-06-25
Decision	2026-09-28
Review time (docketed → decision)	14.7 mo
Submitted → decision	16.3 mo
NRC-reported review duration	—
NRC-reported resources vs estimate	—

Review time is measured in average months from the date the NRC docketed the application to the decision. The NRC's own reported durations may measure to the final safety evaluation instead.

Notes

NRC target for the final safety evaluation: 2026-11. Post-ADVANCE Act. Efficiency-table row still reads 'In progress | TBD' (page last updated 2026-09-14), so NRC has not yet published executed months / % under estimate. Site already had ESP-006 (2019). Early-excavation exemption from 10 CFR 50.10(c) granted 2024 (not a separate record). Submitted: Phased: Part 1 Environmental Report, Part 2 PSAR (final part, May 20, 2025). Conflict on Part 1: NRC project page says 'Environmental Report Submitted (Part One) | April 28, 2025 – A'; FR says April 25. PSAR Rev 1 submitted April 29, 2026. Docketed: NRC page: ER acceptance review complete June 12, 2025; PSAR acceptance review complete July 9, 2025. The Federal Register permit notice (2026-20345) lists the safety evaluation dated June 24, 2026 (ML26168A505); NRC's project page shows it as issued June 25, 2026, which is used for fser.

Timeline

2025-05-20 — Application received: “The application, proposing to construct a GE- Hitachi BWRX-300 reactor, was received in two parts on April 25 and May 20, 2025.” (source)
2025-07-09 — Accepted for review (docketed): “The application was docketed on July 9, 2025.” (source)
2026-06-25 — Final safety evaluation issued. (source)
2026-08-13 — Commission mandatory hearing. (source)
2026-09-28 — Issued: “The Construction Permit No. CPAR-2 was issued on September 28, 2026.” (source)

The timeline is append-only: corrections are added as new entries. See the NNN Data License Terms for reuse of the event history.

Also tracked

clinch-river-1 in the Reactor Project Tracker

NNN coverage

About Tennessee Valley Authority

NRC approves TVA’s Clinch River BWRX-300 permit 2026-10-01
NNN Daily Brief — July 12, 2026 2026-07-12
TVA's 2026 IRP puts advanced nuclear in the grid plan 2026-07-12
The 7 nuclear stories that mattered this week 2026-10-03
Nuclear power for data centers, explained: every deal tracked 2026-10-01
Bechtel splits with TerraPower on Natrium, files 200-job WARN notice 2026-09-20

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