Diablo Canyon gets key state approval

December 16, 2025, 7:00AMNuclear News

Pacific Gas & Electric has announced that the California Coastal Commission, the state agency in charge of protecting California’s roughly 840 miles of coastline, unanimously voted to approve the Act Consistency Certification and Coastal Development Permit for Diablo Canyon, a critical step in the utility’s work to extend the life of the nuclear power plant.

Browns Ferry’s reactors receive subsequent license renewals

December 15, 2025, 12:02PMNuclear News
The Browns Ferry nuclear power plant. (Photo: TVA)

The operating licenses for the three boiling water reactors at Browns Ferry nuclear power plant, in Athens, Ala., have each been renewed by the Nuclear Regulatory Commission for an additional 20 years. The reactors, operated by the Tennessee Valley Authority, are now licensed to operate until December 2053 for Unit 1, June 2054 for Unit 2, and July 2056 for Unit 3.

Supplier Showcase focus: License renewals

September 22, 2025, 3:01PMNuclear News

The American Nuclear Society is hosting a Supplier Showcase webinar, “License Renewal: Smarter, Faster, Better,” tomorrow, September 23, from 2:00 p.m. to 3:00 p.m. (ET) on the increasing urgency of submitting license renewals and subsequent license renewals both efficiently and accurately.

The webinar is free for all viewers and requires registration.

NRC completes environmental review of Dresden SLR

September 15, 2025, 9:30AMNuclear News
The Dresden nuclear power plant. (Photo: Constellation Energy)

The Nuclear Regulatory Commission has found that the environmental impacts of renewing the operating license of the Dresden nuclear power plant outside Chicago, Ill., for an additional 20 years are not great enough to prohibit doing so.

NRC completes environmental review of Peach Bottom, Browns Ferry SLRs

September 2, 2025, 7:19AMNuclear News
Browns Ferry nuclear power plant. (Photo: NRC)

The Nuclear Regulatory Commission has found that the environmental impacts of renewing the operating licenses of the Peach Bottom and Browns Ferry nuclear power plants for an additional 20 years are not great enough to prohibit doing so. If renewed, the licenses will allow the plants to operate for up to 80 years.

How does subsequent license renewal relate to the restart of nuclear power plants?

April 10, 2025, 7:00AMNuclear NewsGary Adkins

Gary Adkins

Subsequent license renewal (SLR) authorizes nuclear power plants to operate for an additional 20 years beyond the 60 years of the initial license (years 1–40) and the first license renewal (years 41–60). NUREG-2191, Generic Aging Lessons Learned for Subsequent License Renewal (GALL-SLR), and NUREG-2192, Standard Review Plan for Review of Subsequent License Renewal Applications (SRP-SLR), were issued in July 2017 and provide guidance for generic evaluation of plant aging management programs and reviews of SLR applications, respectively, by Nuclear Regulatory Commission staff.

The first SLR application was submitted to the NRC for review in January 2018. A total of 10 additional SLR applications addressing 20 operating units have been submitted to the NRC. Nine operating units have been approved by the NRC, and 13 units are under review. These 22 units do not have any issues, including operating experience issues, precluding them from achieving a renewed license.

Age is just a number

April 8, 2025, 12:00PMNuclear NewsCraig Piercy

Craig Piercy
cpiercy@ans.org

This month’s Nuclear News pays tribute to the people and projects that keep our nuclear power plants running.

In the nuclear industry, “life extension” is a venerable term that broadly describes the care required to sustain the safe and efficient operation of large, complex energy generation facilities for decades to come, some of which you will read about in these pages.

Of late, however, the general concept of life extension has also taken a firmer hold in our societal consciousness.

Whether we absorb it from Instagram videos about some Silicon Valley techie’s quest for immortality or sense it in one of the thousands of dryly written journal articles documenting our increasing ability to control and change life at the molecular level, the promise of extended life and health has universal appeal—and it’s never seemed more within reach than it does right now.

Constellation to invest $100M in Maryland nuclear plant

February 12, 2025, 9:30AMNuclear News
Calvert Cliffs nuclear power plant. (Photo: Constellation)

Nuclear powerhouse Constellation Energy announced Tuesday it will spend roughly $100 million to upgrade critical electrical systems and plant equipment at its Calvert Cliffs nuclear power plant, where the company may pursue license renewals.

NRC seeks public comment on Diablo Canyon draft environmental report

November 5, 2024, 3:01PMNuclear News
The Diablo Canyon plant. (Photo: Doc Searles)

The Nuclear Regulatory Commission is asking for public comment on its draft supplemental environmental impact statement for Diablo Canyon’s license renewal request.

NRC agrees to reevaluate seismic risk at Diablo Canyon

September 3, 2024, 3:01PMNuclear News

In response to a petition filed by environmental groups earlier this year, the Nuclear Regulatory Commission will reinvestigate earthquake fault lines and the potential for seismic activity and ensuing damage at California’s Diablo Canyon nuclear power plant.

Comanche Peak adds years to operating licenses

July 31, 2024, 7:12AMNuclear News
Comanche Peak nuclear power plant. (Photo: Meranda Cohn/Vistra)

The Nuclear Regulatory Commission has renewed the operating licenses of Comanche Peak Units 1 and 2 for an additional 20 years.

Unit 1’s operating license now expires on February 8, 2050, and Unit 2’s on February 2, 2053.

California lawmakers, governor at odds over Diablo Canyon funding

June 11, 2024, 3:01PMNuclear News
Gov. Gavin Newsom visits Diablo Canyon in this 2023 photo (Source: Governor’s office)

In budget discussions conducted last week, the California legislature rejected a $400 million budget item to help keep the state’s sole remaining nuclear plant operational.

Diablo Canyon—owned by Pacific Gas & Electric—has been the subject of much debate in California. To meet grid demands during a record hot summer in 2022, Gov. Gavin Newsom had cut a deal to give $1.4 billion to support continued operations at the 2,200-MWe nuclear facility.

Constellation seeks subsequent license renewal for Dresden

April 18, 2024, 9:30AMNuclear News
Dresden nuclear power plant. (Photo: Constellation Energy)

Constellation Energy has filed with the Nuclear Regulatory Commission for a subsequent license renewal for its Dresden nuclear power plant in Illinois. The extension would allow Dresden to run through 2051.

The filing begins a comprehensive, multiyear review by the NRC. Unit 2 is currently licensed to operate through 2029 and Unit 3 through 2031. The facility’s license was first renewed by the NRC in 2004.

Clinton seeks initial license renewal

February 20, 2024, 6:55AMNuclear News
Clinton nuclear power plant, located near Clinton, Ill. (Photo: Constellation)

Constellation Energy is asking the Nuclear Regulatory Commission for an initial license renewal for its Clinton nuclear plant in Illinois, which would allow the facility to operate through 2047.

This move is not unexpected from Constellation, the largest producer of nuclear power in the United States. The vast majority of nuclear plants in the United States have already been approved for their first 20-year renewal term. Clinton, which came on line in 1987, is one of the nation’s “newer” plants.

NRC seeks public comment on Diablo Canyon license renewal application

January 25, 2024, 12:01PMNuclear News
Diablo Canyon nuclear power plant. (Photo: Doc Searls)

The Nuclear Regulatory Commission has scheduled two meetings in February to discuss the environmental evaluation and review process for the license renewal application of the two-unit Diablo Canyon nuclear power plant in Avila Beach, Calif.

NRC okays license transfers for Energy Harbor plants

October 3, 2023, 7:00AMNuclear News

The Nuclear Regulatory Commission has approved the transfer of the operating licenses for four reactors and their associated spent fuel storage facilities from Energy Harbor Nuclear Corporation to Vistra Operations Company, the agency announced September 29.

Court shuts down Diablo Canyon shutdown effort

August 29, 2023, 9:30AMNuclear News
Diablo Canyon nuclear power plant. (Photo: PG&E)

A California court has dismissed a lawsuit brought in April by Friends of the Earth (FOE), an inveterate enemy of nuclear power, to derail last year’s state-supported plan to keep the two-unit Diablo Canyon plant running past 2025.

Energy Harbor files for Perry life extension

July 21, 2023, 9:30AMNuclear News
The Perry nuclear power plant. (Photo: ANS)

Energy Harbor has filed its initial license renewal application for the Perry nuclear power plant, requesting an additional 20 years of operation for the facility, the Nuclear Regulatory Commission announced yesterday. Dated July 3, the 2,427-page application is now available on the agency’s website.

NRC to hear arguments against Diablo Canyon ISFSI license renewal

April 25, 2023, 9:36AMRadwaste Solutions
The Diablo Canyon nuclear power plant.

The Nuclear Regulatory Commission announced that an agency licensing board will hold oral arguments in a challenge to Pacific Gas and Electric’s application to renew its license for the Diablo Canyon independent spent fuel storage installation in California.

The arguments, which will be open to the public, will be heard by an NRC Atomic Safety and Licensing Board on May 24 beginning at 1 p.m. eastern time.