リクエストによる埋め込み無効
http://youtu.be/V0demfZwoPA
公開日: 2013/06/07
Southern California Edison's parent company announced Friday it is shutting down the San Onofre Nuclear Generating Station just north of Camp Pendleton, the latest chapter of a saga that began with the discovery of a small leak of radioactive steam.
========================================================Waves Crash Against San Onofre Nuclear Power Station in California
http://youtu.be/X9lAoyAhoq8
アップロード日: 2011/11/07
Part 4 in Environment & Economy Subcommittee Chairman Shimkus' series calling on senators to stand up to Majority Leader Reid and move forward on Yucca Mountain.
========================================================
San Onofre Nuclear Generating Station - Video Tour
http://youtu.be/LvOUoM3XXGA
公開日: 2012/10/23
説明はありません。
========================================================
San Onofre nuclear plant insider warns restarting reactor is too dangerous
http://youtu.be/7pW-b9q70Io
リクエストによる埋め込み無効
公開日: 2013/04/25
A source inside the San Onofre nuclear power plant says restarting the power plant is too dangerous.
San Onofre Nuclear Power Plant Finally Permanently Shut Down !
http://youtu.be/bFJijaAY7Pw
公開日: 2013/06/07
Southern California Edison announced Friday it would shut down the troubled San Onofre nuclear power plant.
The move comes 17 months after the San Onofre plant was closed because of problems in steam generator systems. The plant powered about 1.4 million households in Southern California before the outage.
Until now, Edison had vowed to restart the plant. But the company released a statement Friday saying it would stop the process to fire up the plant.
Q&A: Why is it closing and what will it cost?
"We have concluded that the continuing uncertainty about when or if [the plant] 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," said Ted Craver, chairman and chief executive of Edison International, parent company of SCE.
SCE President Ron Litzinger said in a statement: "Looking ahead, we think that our decision to retire the units will eliminate uncertainty and facilitate orderly planning for California's energy future."
The move comes 17 months after the San Onofre plant was closed because of problems in steam generator systems. The plant powered about 1.4 million households in Southern California before the outage.
Until now, Edison had vowed to restart the plant. But the company released a statement Friday saying it would stop the process to fire up the plant.
Q&A: Why is it closing and what will it cost?
"We have concluded that the continuing uncertainty about when or if [the plant] 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," said Ted Craver, chairman and chief executive of Edison International, parent company of SCE.
SCE President Ron Litzinger said in a statement: "Looking ahead, we think that our decision to retire the units will eliminate uncertainty and facilitate orderly planning for California's energy future."
========================================================
San Onofre nuclear power plant: Fukushima USA?
http://youtu.be/PWrq4pzqyaw
公開日: 2013/02/05
Nuclear energy is responsible for powering nearly 20 percent of the US, and in Southern California the San Onofre nuclear power plant has created much debate in the surrounding community. The station has been closed for about a year due to a leak that was detected in the steam generator tubes, but despite the wishes of the people living the area to keep the plant closed, the utility company is pushing to bring the reactor back online. Arnie Gundersen, chief engineer for Fairewinds Energy Education, analyzes the situation.
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========================================================
San Onofre Shut Down Activist Press Conference
http://youtu.be/Vj6qFDTcq6c
公開日: 2013/06/07
Friday, June 7, 2013 San Onofre Nuclear Generating Station (SONGS)
Anti-Nuclear Activists hold a press conference in response to Southern California Edison announcing plans to retire the San Onofre Nuclear Power Plant.
Speakers include:
0:40 Ray Lutz, Citizens Oversight Projects (COPS)
3:00 Carol Jahnkow, Peace Resource Center San Diego
4:20 Gary Headrick, San Clemente Green
6:20 Donna Gilmore, San Onofre Safety
9:30 Arnold "Arnie" Gundersen, chief engineer of energy consulting company Fairewinds Associates, an anti-nuclear campaigner, and a former nuclear power industry executive.
11:10 Gene Stone, Residents Organized for a Safe Environment (R.O.S.E.)
12:30 Cathy Iwane
15:30 Crystal Coleman
19:30 Lynn Harris Hicks, local resident and activist
22:20 Joe Holtzman
Citizens' Oversight Projects
http://www.citizensoversight.org/
Peace Resource Center
http://prcsd.org/
Friends of the Earth
http://www.foe.org/
San Clemente Green
http://www.sanclementegreen.org/
San Onofre Safety (SOS)
http://sanonofresafety.org/
Nuclear Free California
http://www.nuclearfreecal.org/nfcnet/
Fairewinds Energy Education
http://fairewinds.org/
Residents Organized for a Safe Environment
http://residentsorganizedforasafeenvi...
Anti-Nuclear Activists hold a press conference in response to Southern California Edison announcing plans to retire the San Onofre Nuclear Power Plant.
Speakers include:
0:40 Ray Lutz, Citizens Oversight Projects (COPS)
3:00 Carol Jahnkow, Peace Resource Center San Diego
4:20 Gary Headrick, San Clemente Green
6:20 Donna Gilmore, San Onofre Safety
9:30 Arnold "Arnie" Gundersen, chief engineer of energy consulting company Fairewinds Associates, an anti-nuclear campaigner, and a former nuclear power industry executive.
11:10 Gene Stone, Residents Organized for a Safe Environment (R.O.S.E.)
12:30 Cathy Iwane
15:30 Crystal Coleman
19:30 Lynn Harris Hicks, local resident and activist
22:20 Joe Holtzman
Citizens' Oversight Projects
http://www.citizensoversight.org/
Peace Resource Center
http://prcsd.org/
Friends of the Earth
http://www.foe.org/
San Clemente Green
http://www.sanclementegreen.org/
San Onofre Safety (SOS)
http://sanonofresafety.org/
Nuclear Free California
http://www.nuclearfreecal.org/nfcnet/
Fairewinds Energy Education
http://fairewinds.org/
Residents Organized for a Safe Environment
http://residentsorganizedforasafeenvi...
San Onofre Nuclear Power Plant: What's Next?
http://youtu.be/tru3_qHVJO4
公開日: 2013/06/24
Dr. Murray Jennex of San Diego State University discusses what neighbors and utility rates payers can expect now that the San Onofre nuclear power plant will be shut down permanently. Jennex was interviewed by KUSI's Allan Denton on June 23, 2013.
US nuclear waste dilemma
http://youtu.be/bCLdQOOvrww
公開日: 2013/02/26
With two decades to go before it can reprocess spent nuclear fuel, the US will have to bury nearly 70,000 tons of it, a research lab reports. It comes after Congress and the Obama administration defunded a planned nuclear waste repository in 2011.
The Oak Ridge National Laboratory, a facility that does research for the Department of Energy (DOE), said that "about 68,450 [metric tons] or about 98 percent of the total current inventory by mass, can proceed to permanent disposal without the need to ensure retrievability for reuse or research purposes" in its report, published near the end of 2012. The rest of the waste, the report said, could be kept available for research on fuel reprocessing and storage.
The report was fairly obscure until being cited in a DOE document that showed plans to find a new permanent waste dump after Congress and the Obama administration cut funding for the Yucca Mountain repository in 2011.
Reprocessing has little support in Washington due to concerns that spent fuel could fall into the wrong hands. Nevertheless the DOE started looking into reprocessing methods in 2005.
But following the March 2011 disaster at Japan's Fukushima Daiichi nuclear power plant, US officials became wary of recycling radioactive waste.
The Blue Ribbon Commission on America's Nuclear Future, co-chaired by Energy Secretary Steven Chu, said that "no currently available or reasonably foreseeable reactor and fuel cycle technology developments - including advances in reprocessing and recycling technologies - have the potential to fundamentally alter the waste management challenges the nation confronts over at least the next several decades, if not longer" in a report.
Watch this video on our website: http://www.presstv.ir/Program/290903....
Broadcast Date: 25 Feb. 2013
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The Oak Ridge National Laboratory, a facility that does research for the Department of Energy (DOE), said that "about 68,450 [metric tons] or about 98 percent of the total current inventory by mass, can proceed to permanent disposal without the need to ensure retrievability for reuse or research purposes" in its report, published near the end of 2012. The rest of the waste, the report said, could be kept available for research on fuel reprocessing and storage.
The report was fairly obscure until being cited in a DOE document that showed plans to find a new permanent waste dump after Congress and the Obama administration cut funding for the Yucca Mountain repository in 2011.
Reprocessing has little support in Washington due to concerns that spent fuel could fall into the wrong hands. Nevertheless the DOE started looking into reprocessing methods in 2005.
But following the March 2011 disaster at Japan's Fukushima Daiichi nuclear power plant, US officials became wary of recycling radioactive waste.
The Blue Ribbon Commission on America's Nuclear Future, co-chaired by Energy Secretary Steven Chu, said that "no currently available or reasonably foreseeable reactor and fuel cycle technology developments - including advances in reprocessing and recycling technologies - have the potential to fundamentally alter the waste management challenges the nation confronts over at least the next several decades, if not longer" in a report.
Watch this video on our website: http://www.presstv.ir/Program/290903....
Broadcast Date: 25 Feb. 2013
Follow our Facebook on: http://www.facebook.com/presstvchannel
Follow our Twitter on: http://twitter.com/presstv
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========================================================
http://www.asahi.com/news/intro/TKY201206210572.html
原発水漏れ「三菱重工のミス」 ＮＲＣが原因指摘
2012年6月22日03時00分
蒸気発生器の配管破損で停止中の米カリフォルニア州南部のサンオノフレ原発について、米原子力規制委員会（ＮＲＣ）は、製造した三菱重工業の「不十分なコンピューター分析が設計ミスを招いた」との調査結果を明らかにした。ＡＰ通信などが報じた。原発を運営する電力会社は、電力需要が高まる８月中は運転再開ができないとしている。
ＮＲＣの調査チームを率いたグレッグ・ワーナー氏が１８日、州南部で開いた公聴会で「三菱重工のコンピューターシミュレーションが、蒸気発生器内の蒸気や水の速さを見誤った」との見方を示した。このため配管の束の支えが弱くなり、振動が起きたという。運営する南カリフォルニア・エジソン社に罰則が科せられる可能性がある。
三菱重工は２０日、この問題で初めて公式にコメントを発表。「蒸気発生器は日本の原発向けのほぼ２倍と超大型で、国内とは仕様や条件が異なる」「国内では類似の事象が発生する可能性はない」と釈明した。
２１日に東京都内で開かれた同社の株主総会では、株主から株価への影響について質問も。宮永俊一副社長は「真っ正面から問題に取り組み、着実に、誠実に対応していく」と答えた。
サンオノフレ原発は１月３１日、３号機の蒸気発生器の配管から水が漏れて緊急停止。微量の放射性物質が漏れた可能性もある。定期点検中の２号機でも配管の摩耗が見つかり、ＮＲＣはすべての稼働を禁じた。
エジソン社によると、３号機の配管は２０１０年後半に納入、１１年初めに稼働を始めたばかり。２号機は０９年後半納入、１０年初めに稼働を始めた。（藤えりか＝ロサンゼルス、木村裕明）
========================================================
http://jp.reuters.com/article/topNews/idJPTYE96I02020130719
廃炉の米サンオノフレ原発運営会社、三菱重工に賠償要求
2013年 07月 19日 11:45 JST［１８日 ロイター］ - 原子炉の廃炉が決まった米カリフォルニア州サンオノフレ原子力発電所の運営会社であるサザン・カリフォルニア・エジソン（ＳＣＥ）(SCE_pe.A: 株価, 企業情報, レポート)は、蒸気発生器を製造した三菱重工業(7011.T: 株価, ニュース, レポート)が適正な設計をせず、迅速に修繕もしないことで契約に違反したとして、損害の責任を取るよう求める内容の通知を１８日に行ったことを明らかにした。
同原発では、三菱重工製の蒸気発生器で配管が破損し、微量の放射性物質が漏れ出したことを受け、２０１２年１月初めから原子炉の運転を停止。ＳＣＥは６月初めに廃炉とすることを発表していた。
ＳＣＥは、三菱重工がテストを適正に行わず、配管の破損を回避するような構造を設計しなかったとしている。
仲介者を交えた法的な手続きに入る前に、三菱重工がＳＣＥ側の主張に回答するまでの期間は９０日。
ＳＣＥの広報担当者は「三菱重工側が、欠陥のある蒸気発生器や、関係各所に及ぼした甚大な損害に対する責任を取ることを求めている」としている。
一方、三菱重工の広報担当者はこれらの主張に対する対応を検討しているとコメントした。
ＳＣＥは米電力会社エジソン・インターナショナル(EIX.N: 株価, 企業情報, レポート)の傘下にある。
© Thomson Reuters 2013 All rights reserved.
関連ニュース
========================================================
San Onofre Nuclear Generating Station
http://en.wikipedia.org/wiki/San_Onofre_Nuclear_Generating_Station
The San Onofre Nuclear Generating Station (SONGS) is an inoperative nuclear power plant located on the Pacific coast of California, in the northwestern corner of San Diego County, south of San Clemente, now planned to be decommissioned. The now-closed facility is owned by Southern California Edison. Edison International, parent of SCE, holds 78.2% ownership in the plant; San Diego Gas & Electric Company, 20%; and the City of Riverside Utilities Department, 1.8%. When fully functional, the plant employed over 2,200 people.[4] The plant is located in Nuclear Regulatory Commission Region IV. The plant is a prominent landmark because of its spherical containment buildings, designed to contain any unexpected releases of radiation.
The plant's first unit, Unit 1, operated from 1968 to 1992.[5] Unit 2 was started in 1983 and Unit 3 started in 1984. Upgrades designed to last 20 years were made to the reactor units in 2009 and 2010; however, both reactors had to be shut down in January 2012 due to premature wear found on over 3,000 tubes in the recently replaced steam generators. The Nuclear Regulatory Commission is currently investigating the events that led to the closure. In May 2013 Senator Barbara Boxer, chairman of the Senate Environment and Public Works Committee, said the modifications had proved to be "unsafe and posed a danger to the eight million people living within 50 miles of the plant,” and she called for a criminal investigation.[6]
Southern California Edison announced on June 7, 2013 that it would "permanently retire" Unit 2 and Unit 3, citing "continuing uncertainty about when or if SONGS might return to service" and noting that ongoing regulatory and "administrative processes and appeals" would likely cause any tentative restart plans to be delayed for "more than a year." The company stated that "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."[7]
Reactors
Unit 1, a first generation Westinghouse pressurized water reactor that operated for 25 years, closed permanently in 1992, and has been dismantled and is used as a storage site for spent fuel.[8] It had a spherical containment of concrete and steel with the smallest wall being 6 feet (1.8 m) thick. It generated 456 MWe gross, and 436 MWe net, when operating at 100% capacity.[9]
Units 2 and 3, Combustion Engineering two-loop pressurized water reactors, generated 1,127 MWe gross, and 1,070 MWe and 1,080 MWe net respectively, when operating at 100% capacity.[9]
In a ten-year project completed in 2011 and costing $671 million, Edison replaced the steam generators in both reactors with improved Mitsubishi steam generators. Because of the reactors' two-loop design, uncommon for large reactors of that era, the steam generators are amongst the largest in the industry. A common shortcoming of these large steam generators was tube wear, leading to replacement being required earlier than their 40-year design life.[10] The steam generators are the largest components in the reactor, and installing them required cutting a temporary hole in the concrete containment shell. The Unit 2 replacement was completed in 2009 and Unit 3 in 2011. The company estimated that the modernization would save customers $1 billion during the plant's current license period, which ran until 2022.[11][12]
During its operation, SONGS provided about 20% of the power to large portions of Southern California.[13]
2012 shutdown and subsequent closure
In June 2012 the environmental group Friends of the Earth filed a legal petition with the NRC, asking that any decision to restart SONGS be considered a de-facto license amendment requiring an adjudicatory public hearing, rather than a decision by the NRC commissioners. SCE and NRC Staff filed statements opposing the petition.[46][47]
In July 2012 the NRC issued its final report, identifying ten issues that need followup and stating “the plant will not be permitted to restart until the licensee has developed a plan to prevent further steam generator tube degradation and the NRC independently verifies that it can be operated safely."[48] As of July 2012, the cost related to the shutdown had reached $165 million, with $117 million of that being the purchasing of power from other sources to replace the output of the plant.[49] As a result, the Chairman of Edison International Ted Craver stated that there is a possibility that reactor 3 might be scrapped as "It is not clear at this time whether Unit 3 will be able to restart without extensive additional repairs".[49]
In August 2012, Southern California Edison announced plans to lay off one-third, or 730, of the plants employees; the company said that the downsizing of the plant staff was planned more than two years ago. Rochelle Becker of the Alliance for Nuclear Responsibility said that the layoffs showed that the company was not being honest about their plans for the power plant.[4][50] Due to the shutdown, the NRC ended requirements to monitor non-operating systems.[19]
In September 2012, Allison Macfarlane, the NRC Chairwoman, said that plant would be down for a prolonged period, and that the fuel from Unit 3 would be removed in September 2012, due to significant damage to the unit.[51]
On October 3, 2012, SCE submitted a "Unit 2 Return to Service Report" to the NRC. SCE stated it had taken corrective actions, such as plugging worn tubes and preventively plugged additional tubes. SCE proposed a restart while administratively limiting Unit 2 to 70% power, intended to prevent excessive tube vibration, until a midcycle inspection within 150 days of operation.[46][52] SCE reported that most of the excessive wear was in limited areas, due to higher speed and drier steam than computer modeling had predicted, and inadequate tube support at the U-bend. Analysis had concluded operating at 70% power would eliminate the conditions that caused excessive wear.[53]
On November 8, 2012, the NRC decided to refer the Friends of the Earth hearing request to the Atomic Safety and Licensing Board.[46] By November 2012, the cost of the outage was over $300 million,[54] and discussion of restarting Unit 2 has been postponed.[55] In December 2012, the last of the four old steam generators were transported to Clive, Utah for disposal.[56]
In February 2013, the Nuclear Regulatory Commission asked the steam generator manufacturer, Mitsubishi Heavy Industries, to provide a redacted version of a report on the plant's steam generators for publication. The report described the changes made in the replacement steam generator, which included the removal of a support cylinder and changes to the tube support plates and anti-vibration bars, and the addition of about 400 tubes.[57][58]
California Senator Dianne Feinstein signaled approval of the decision to permanently close the plant, stating "I firmly believe this is the right thing to do for the more than 7 million Californians who live within 50 miles of San Onofre." However, Representative Darrell Issa, whose voting district includes the nuclear station, was more downbeat, saying "our communities now face the loss of employment for more than a thousand highly skilled workers and an essential local source of low-cost, clean energy." Issa also pledged to work to improve the prospects for nuclear power nationwide. In contrast, Sierra Club Director Kathryn Phillips applauded the move, saying in a statement that "We hope, especially, that the utilities will take this opportunity to help get more locally generated renewable energy, such as rooftop solar, into their portfolios."[64]
This page was last modified on 21 July 2013 at 11:52.
========================================================
San Onofre Nuclear Generating Station
http://en.wikipedia.org/wiki/San_Onofre_Nuclear_Generating_Station
The San Onofre Nuclear Generating Station (SONGS) is an inoperative nuclear power plant located on the Pacific coast of California, in the northwestern corner of San Diego County, south of San Clemente, now planned to be decommissioned. The now-closed facility is owned by Southern California Edison. Edison International, parent of SCE, holds 78.2% ownership in the plant; San Diego Gas & Electric Company, 20%; and the City of Riverside Utilities Department, 1.8%. When fully functional, the plant employed over 2,200 people.[4] The plant is located in Nuclear Regulatory Commission Region IV. The plant is a prominent landmark because of its spherical containment buildings, designed to contain any unexpected releases of radiation.
The plant's first unit, Unit 1, operated from 1968 to 1992.[5] Unit 2 was started in 1983 and Unit 3 started in 1984. Upgrades designed to last 20 years were made to the reactor units in 2009 and 2010; however, both reactors had to be shut down in January 2012 due to premature wear found on over 3,000 tubes in the recently replaced steam generators. The Nuclear Regulatory Commission is currently investigating the events that led to the closure. In May 2013 Senator Barbara Boxer, chairman of the Senate Environment and Public Works Committee, said the modifications had proved to be "unsafe and posed a danger to the eight million people living within 50 miles of the plant,” and she called for a criminal investigation.[6]
Southern California Edison announced on June 7, 2013 that it would "permanently retire" Unit 2 and Unit 3, citing "continuing uncertainty about when or if SONGS might return to service" and noting that ongoing regulatory and "administrative processes and appeals" would likely cause any tentative restart plans to be delayed for "more than a year." The company stated that "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."[7]
Reactors
Unit 1, a first generation Westinghouse pressurized water reactor that operated for 25 years, closed permanently in 1992, and has been dismantled and is used as a storage site for spent fuel.[8] It had a spherical containment of concrete and steel with the smallest wall being 6 feet (1.8 m) thick. It generated 456 MWe gross, and 436 MWe net, when operating at 100% capacity.[9]
Units 2 and 3, Combustion Engineering two-loop pressurized water reactors, generated 1,127 MWe gross, and 1,070 MWe and 1,080 MWe net respectively, when operating at 100% capacity.[9]
In a ten-year project completed in 2011 and costing $671 million, Edison replaced the steam generators in both reactors with improved Mitsubishi steam generators. Because of the reactors' two-loop design, uncommon for large reactors of that era, the steam generators are amongst the largest in the industry. A common shortcoming of these large steam generators was tube wear, leading to replacement being required earlier than their 40-year design life.[10] The steam generators are the largest components in the reactor, and installing them required cutting a temporary hole in the concrete containment shell. The Unit 2 replacement was completed in 2009 and Unit 3 in 2011. The company estimated that the modernization would save customers $1 billion during the plant's current license period, which ran until 2022.[11][12]
During its operation, SONGS provided about 20% of the power to large portions of Southern California.[13]
2012 shutdown and subsequent closure
Initial shutdown
Unit 2 was shut down in early January 2012 for routine refueling and replacement of the reactor vessel head.[39] On January 31, 2012, Unit 3 suffered a small radioactive leak largely inside the containment shell, with a very small release to the environment below allowable limits, and the reactor was shut down per standard procedure.[40][41][42] On investigation, both units were found to show premature wear on over 3,000 tubes, in 15,000 places, in the replacement steam generators installed in 2010 and 2011.[43] Plant officials pledged not to restart the units until the causes of the tube leak and tube degradation were understood.[39] Neither unit was ever restarted. There were no blackouts due to the lack of SONGS electricity; however, more pollution was caused due to the use of natural gas plants used to make up for the power generation, and the additional cost has led to higher utility bills.[44]NRC response
On March 27, 2012, the NRC issued a Confirmatory Action Letter (CAL) forbidding the plant to be reopened until the causes of its equipment problems are thoroughly understood and fixed.[45][46] At the same time, Irvine Councilman Larry Agran called for the plant to be decommissioned, saying it should be decommissioned safely and as soon as possible.[28] Concerns include “nuclear waste stored at the plant, health hazards from radioactive material, and inadequate evacuation plans”. Resolutions passed in neighboring cities Laguna Beach and San Clemente called for safer and more secure waste storage. San Clemente voted to request public information about radiation levels near the plant. Bob Steins, spokesman for Edison International, said “the company will work to prepare detailed responses to council and community member questions and concerns”.[28]In June 2012 the environmental group Friends of the Earth filed a legal petition with the NRC, asking that any decision to restart SONGS be considered a de-facto license amendment requiring an adjudicatory public hearing, rather than a decision by the NRC commissioners. SCE and NRC Staff filed statements opposing the petition.[46][47]
In July 2012 the NRC issued its final report, identifying ten issues that need followup and stating “the plant will not be permitted to restart until the licensee has developed a plan to prevent further steam generator tube degradation and the NRC independently verifies that it can be operated safely."[48] As of July 2012, the cost related to the shutdown had reached $165 million, with $117 million of that being the purchasing of power from other sources to replace the output of the plant.[49] As a result, the Chairman of Edison International Ted Craver stated that there is a possibility that reactor 3 might be scrapped as "It is not clear at this time whether Unit 3 will be able to restart without extensive additional repairs".[49]
In August 2012, Southern California Edison announced plans to lay off one-third, or 730, of the plants employees; the company said that the downsizing of the plant staff was planned more than two years ago. Rochelle Becker of the Alliance for Nuclear Responsibility said that the layoffs showed that the company was not being honest about their plans for the power plant.[4][50] Due to the shutdown, the NRC ended requirements to monitor non-operating systems.[19]
In September 2012, Allison Macfarlane, the NRC Chairwoman, said that plant would be down for a prolonged period, and that the fuel from Unit 3 would be removed in September 2012, due to significant damage to the unit.[51]
On October 3, 2012, SCE submitted a "Unit 2 Return to Service Report" to the NRC. SCE stated it had taken corrective actions, such as plugging worn tubes and preventively plugged additional tubes. SCE proposed a restart while administratively limiting Unit 2 to 70% power, intended to prevent excessive tube vibration, until a midcycle inspection within 150 days of operation.[46][52] SCE reported that most of the excessive wear was in limited areas, due to higher speed and drier steam than computer modeling had predicted, and inadequate tube support at the U-bend. Analysis had concluded operating at 70% power would eliminate the conditions that caused excessive wear.[53]
On November 8, 2012, the NRC decided to refer the Friends of the Earth hearing request to the Atomic Safety and Licensing Board.[46] By November 2012, the cost of the outage was over $300 million,[54] and discussion of restarting Unit 2 has been postponed.[55] In December 2012, the last of the four old steam generators were transported to Clive, Utah for disposal.[56]
In February 2013, the Nuclear Regulatory Commission asked the steam generator manufacturer, Mitsubishi Heavy Industries, to provide a redacted version of a report on the plant's steam generators for publication. The report described the changes made in the replacement steam generator, which included the removal of a support cylinder and changes to the tube support plates and anti-vibration bars, and the addition of about 400 tubes.[57][58]
Plant closure
On June 7, 2013, Southern California Edison announced it would "permanently retire" Unit 2 and Unit 3, ending their attempt to restart the plant at a reduced capacity. The utility said it would cut the SONGS workforce from about 1,500 to some 400 employees, with most reductions "expected to occur in 2013." The company also said it would "pursue recovery of damages from Mitsubishi Heavy Industries, the supplier of the replacement steam generators",[7][62] although the contract limited liability to $138 million and excluded consequential damages.[53] The chief executive of Edison International explained that the current licenses expire in 2022, and with post-Fukushima requirements, which include re-evaluating earthquake vulnerability, it was uncertain renewal would be economic, so it made little sense making costly and politically difficult repairs now that would not make a return on investment before 2022.[63]California Senator Dianne Feinstein signaled approval of the decision to permanently close the plant, stating "I firmly believe this is the right thing to do for the more than 7 million Californians who live within 50 miles of San Onofre." However, Representative Darrell Issa, whose voting district includes the nuclear station, was more downbeat, saying "our communities now face the loss of employment for more than a thousand highly skilled workers and an essential local source of low-cost, clean energy." Issa also pledged to work to improve the prospects for nuclear power nationwide. In contrast, Sierra Club Director Kathryn Phillips applauded the move, saying in a statement that "We hope, especially, that the utilities will take this opportunity to help get more locally generated renewable energy, such as rooftop solar, into their portfolios."[64]
Actions for financial damage
In July 2013 SCE started a 90-day dispute resolution process with Mitsubishi. If the dispute resolution is unsuccessful, a binding arbitration process will follow.[65]This page was last modified on 21 July 2013 at 11:52.
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