The Three Mile Island Nuclear Plant – An Update on the 35th Anniversary

Neil Sheehan
Public Affairs Officer
Region I
 
The Three Mile Island Unit 2 Control Room bustles during the crisis in 1979. For more historical information, click on the photo to go to the NRC YouTube video about the accident.
The Three Mile Island Unit 2 Control Room bustles during the crisis in 1979. For more historical information, click on the photo to go to the NRC YouTube video about the accident.

Today marks 35 years since the accident at the Three Mile Island 2 nuclear power plant. As is the case every year, it represents another opportunity to reflect on the most significant nuclear power plant accident to ever occur in the U.S.

Perhaps less well known to the average citizen is where things stand in terms of the Middletown, Pa., site all these years later.

GPU Nuclear, which owned the plant at the time of the accident, removed the damaged fuel from the reactor and decontaminated the plant in ensuing years. Once the plant was placed in a safe, stable condition, it transitioned to what is known as “post-defueled monitored storage” — a change that was formally approved by the NRC in 1993.

Last year, the current owner, FirstEnergy, submitted a roadmap to the agency on its plans for eventual dismantling the plant. Those details were contained in a document called a Post-Shutdown Decommissioning Activities Report, or PSDAR.

In short, the plant will remain in storage until its neighboring reactor, Three Mile Island 1, permanently ceases operations, something currently expected to happen in 2034. Once that happens, decommissioning work on both units will be undertaken, but those efforts are projected to take many years.

NRC regulations allow up to 60 years for the completion of decommissioning activities for U.S. nuclear power plants.

A view of the TMI-2 control room, last year, with two NRC inspectors.
A view of the TMI-2 control room, last year, with two NRC inspectors.

Meanwhile, the NRC will continue to inspect TMI-2 at regular intervals. The focus of those reviews includes maintenance of the structures, management oversight, fire protection and plant support activities. The results of those inspections can be found in the NRC’s electronic documents system.

While another anniversary has arrived for TMI, the work on keeping close watch on the plant goes on, and will continue for many years to come.

SONGS Special Panel Disbands Now That Plant is Being Permanently Shuttered

Victor Dricks
Senior Public Affairs Officer
Region IV
 

The special NRC panel that was formed last January to oversee the agency’s evaluation of Southern California Edison Co.’s restart plan — and ultimately make a recommendation about whether to approve the restart of the San Onofre Nuclear Generating Station (SONGS) Unit 2 reactor — has been disbanded now that the plant is being permanently shut down and no restart decision is needed.

sanoBut NRC involvement at San Onofre is far from over. The NRC will continue to ensure activities at the plant are conducted in a manner that protects public health and safety now that the plant is transitioning to decommissioning.

The SONGS panel was formed to ensure the root causes of problems with the plant’s steam generators were identified and corrected, and it helped coordinate all SONGS-related communications. This panel documented all of the agency’s major regulatory actions, and coordinated licensing and inspection activities. It also helped plan and conduct periodic public meetings.

Edison announced on June 7 it would permanently shut down Units 2 and 3. The NRC ended its review of the restart plan the same day. The company sent letters to the NRC on June 28 and July 22 certifying all fuel had been removed from both reactors. As a result, Edison is no longer authorized to reload fuel into the reactor vessels or operate the reactors.

Inspection activities have been transferred to the NRC’s Decommissioning Power Reactor Inspection Program. This will ensure spent fuel is being safely stored and all site decommissioning activities are performed safely. The NRC will maintain a resident inspector at the site for at least a year. The agency is also reviewing lessons learned from the SONGS steam generator failures for possible changes to its inspection program.

The NRC held a public meeting in Carlsbad, Calif., on Sept. 26, at which staff outlined the decommissioning process used for nuclear power plants. Edison has until mid-2015 to submit a decommissioning plan to the NRC, although the company has indicated it may submit a plan next summer. When this plan has been submitted, the NRC will sponsor another public meeting.

Additional information about the decommissioning process is available on the NRC web site.