# 2025-20792: Calvert Cliffs Nuclear Unit Seeks Power Backup Extension: NRC Review Underway

2025-20792, Constellation Energy Generation, LLC; Calvert Cliffs Nuclear Power Plant, Unit 2; License Amendment Request, is a Federal Register notice from Nuclear Regulatory Commission published 2025-11-24, effective Submit comments by December 24, 2025. Requests for a hearing or petition for leave to intervene must be filed by January 23, 2026. (as of 2026-06-08).

- Canonical: https://policyrisk.com/federal-register/2025-20792
- As of: 2026-06-08
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-20792
- Title: Constellation Energy Generation, LLC; Calvert Cliffs Nuclear Power Plant, Unit 2; License Amendment Request
- Type: Notice
- Agencies: Nuclear Regulatory Commission
- Citation: 90 FR 53006
- Published: 2025-11-24
- Effective: Submit comments by December 24, 2025. Requests for a hearing or petition for leave to intervene must be filed by January 23, 2026.
- Comments close: 2025-12-24
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-08

## In one line

Calvert Cliffs Nuclear Unit Seeks Power Backup Extension: NRC Review Underway

## Summary

Constellation Energy wants to extend the time allowed to fix a key safety system at Calvert Cliffs Nuclear Power Plant, Unit 2. The Nuclear Regulatory Commission is reviewing this request and asking the public to share their thoughts by December 24, 2025. If approved, this change won’t affect safety but gives the plant more flexibility without extra costs or delays.

## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is considering issuance of an amendment to Renewed Facility Operating License (RFOL) No. DPR-69, issued to Constellation Energy Generation, LLC (CEG, the licensee) for Calvert Cliffs Nuclear Power Plant, Unit 2 (CCNPP). The proposed license amendment would extend the completion time (CT) for Technical Specification 3.8.1, "AC [alternating current] Sources- Operating," Action D.3. For this amendment request, the NRC proposes to determine that it involves no significant hazards consideration.

## Effects PRIA read

No economic effects identified for this document.

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## Sources
- [2025-20792 on federalregister.gov](https://www.federalregister.gov/documents/2025/11/24/2025-20792/constellation-energy-generation-llc-calvert-cliffs-nuclear-power-plant-unit-2-license-amendment)
- [2025-20792 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-11-24/pdf/2025-20792.pdf)

## Related
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Source: PRIA, https://policyrisk.com/federal-register/2025-20792 (as of 2026-06-08).