At 9 a.m. Friday, Southern California Edison will hold a telephone conference to discuss its announcement that it is permanently closing the San Onofre nuclear power plant near San Clemente. The crippled plant has been closed since January 2012, and Edison has struggled against community and environmental groups opposed to its restart.
Edison’s announcement of the closure couches the decision in terms of ending ongoing uncertainty over the fate of the plant. There is no mention of the cause of the shut-down — wear on tubes that contain radioactive water in the generators, which caused a leak, which in turn led to discovery of wear on hundreds of tubes. Edison has long maintained the situation was unexpected, but the release of recent letters from Edison officials to Mitsubishi Heavy Industries, which manufactured the generators, indicate that the company had been aware of the risk of such wear even before the generators were installed.
California Sen. Barbara Boxer, who has been a vocal critic of the plant reopening, greeted the news with relief.
“This nuclear plant had a defective redesign and could no longer operate as intended. Modifications to the San Onofre nuclear
plant were unsafe and posed a danger to the eight million people living within 50 miles of the plant. After a leak of radiation from the steam
generator tubes, I became increasingly alarmed that Southern California Edison had misled regulators by minimizing the scope of the changes made at the nuclear plant to avoid a full safety review and public hearings. That is why I have asked the U.S. Department of Justice, as
well as the California Public Utility Commission and the Nuclear Regulatory Commission, to investigate. I want to thank the community
organizations that came forward with information which demonstrated that the plant redesign presented a great risk to the public. Now that the
San Onofre nuclear plant will be permanently shut down, it is essential that this nuclear plant be safely decommissioned and does not become a
continuing liability for the community.”
The next question will be how to replace or compensate for the 2,200 megawatts of power San Onofre pumped onto the state’s electric grid — about 17 percent of Edison’s power, company officials have said in the past. The California Independent System Operator, which manages the grid, has already planned for a summer without San Onofre, including reliance on Competitive Power Ventures’ Sentinel power plant in North Palm Springs, the 800-megawatt natural gas plant that went online in May, two and a half months ahead of schedule.
The full text of Edison’s announcement is below:
Southern California Edison (SCE) has decided to permanently retire Units 2 and 3 of its San Onofre Nuclear Generating Station (SONGS).
“SONGS has served this region for over 40 years,” said Ted Craver, Chairman and CEO of Edison International, parent company of SCE, “but we have concluded that the continuing uncertainty about when or if SONGS might return to service was not good for our customers, our investors, or the need to plan for our region’s long-term electricity needs.”
Both SONGS units have been shut down safely since January 2012. Unit 2 was taken out of service January 9, 2012, for a planned routine outage. Unit 3 was safely taken offline January 31, 2012, after station operators detected a small leak in a tube inside a steam generator manufactured by Mitsubishi Heavy Industries (MHI). Two steam generators manufactured by MHI were installed in Unit 2 in 2009 and two more were installed in Unit 3 in 2010, one of which developed the leak.
In connection with the decision, SCE estimates that it will record a charge in the second quarter of between $450 million and $650 million before taxes ($300 million – $425 million after tax), in accordance with accounting requirements.
After months of analysis and tests, SCE submitted a restart plan to the Nuclear Regulatory Commission (NRC) in October 2012. SCE proposed to safely restart Unit 2 at a reduced power level (70%) for an initial period of approximately five months. That plan was based on work done by engineering groups from three independent firms with expertise in steam generator design and manufacturing.
The NRC has been reviewing SCE’s plans for restart of Unit 2 for the last eight months, during which several public meetings have been held. A recent ruling by an adjudicatory arm of the NRC, the Atomic Safety and Licensing Board, creates further uncertainty regarding when a final decision might be made on restarting Unit 2. Additional administrative processes and appeals could result in delay of more than a year. During this period, the costs of maintaining SONGS in a state of readiness to restart and the costs to replace the power SONGS previously provided would continue. Moreover, it is uneconomic for SCE and its customers to bear the long-term repair costs for returning SONGS to full power operation without restart of Unit 2. SCE has concluded that efforts are better focused on planning for the replacement generation and transmission resources which will be required for grid reliability.
“Looking ahead,” said Ron Litzinger, SCE’s President, “we think that our decision to retire the units will eliminate uncertainty and facilitate orderly planning for California’s energy future.”
Litzinger noted that the company has worked with the California Independent System Operator, the California Energy Commission and the California Public Utilities Commission in planning for Southern California’s energy needs and will continue to do so.
“The company is already well into a summer reliability program and has completed numerous transmission upgrades in addition to those completed last year,” Litzinger said. “Thanks to consumer conservation, energy efficiency programs and a moderate summer, the region was able to get through last summer without electricity shortages. We hope for the same positive result again this year,” Litzinger added, “although generation outages, soaring temperatures or wildfires impacting transmission lines would test the system.”
In connection with the retirement of Units 2 and 3, San Onofre anticipates reducing staff over the next year from approximately 1,500 to approximately 400 employees, subject to applicable regulatory approvals. The majority of such reductions are expected to occur in 2013.
“This situation is very unfortunate,” said Pete Dietrich, SCE’s Chief Nuclear Officer, noting that “this is an extraordinary team of men and women. We will treat them fairly.” SCE will work to ensure a fair process for this transition, and will work with the Utility Workers Union of America (UWUA) and the International Brotherhood of Electric Workers (IBEW) on transition plans for the employees they represent.
SCE also recognizes its continuing safety responsibilities as it moves toward decommissioning of the units. SCE’s top priority will be to ensure a safe, orderly, and compliant retirement of these units. Full retirement of the units prior to decommissioning will take some years in accordance with customary practices. Actual decommissioning will take many years until completion. Such activities will remain subject to the continued oversight of the NRC.
SCE intends to pursue recovery of damages from Mitsubishi Heavy Industries, the supplier of the replacement steam generators, as well as recovery of amounts under applicable insurance policies.
San Onofre is jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and the city of Riverside (1.79 percent).