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Showing posts with label songs. Show all posts
Showing posts with label songs. Show all posts

Tuesday, 8 October 2013

SCE Demands Mitsubishi Allow Contractually Mandated Audit

Posted on 07:23 by Unknown
The following press release was received last evening from Southern California Edison.

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Media Contact: Media Relations, (626) 302-2255

SCE Demands that Mitsubishi Submit to Contractually Mandated Audit

Mitsubishi Has Refused Repeated Requests to Allow the Audit in the Months Since Its Failed Replacement Steam Generators Resulted in the Permanent Closure of San Onofre

ROSEMEAD, Calif., Oct. 7, 2013 — Southern California Edison (SCE) today announced that it has formally demanded that Mitsubishi Heavy Industries agree to undergo a contractually mandated audit of Mitsubishi's design and manufacture of Replacement Steam Generators (RSGs) for the San Onofre nuclear plant. On Sept. 20, the Nuclear Regulatory Commission (NRC) concluded that a flaw in Mitsubishi's computer model led to the failure of the Replacement Steam Generators. The NRC's investigation also uncovered internal Mitsubishi consultant materials that expressed concerns about Mitsubishi's computer model.

Edison's latest formal audit demand, set forth in a letter from SCE president Ron Litzinger, can be found at http://www.songscommunity.com/docs/093013_letter.pdf. The letter notes that SCE “officials and lawyers have made this [audit] request on at least three prior occasions, but Mitsubishi has steadfastly refused to date to submit to this audit.” Litzinger wrote that he was appealing once again “because Mitsubishi's repeated refusal to agree to such an audit is harmful to the public, regulators and our entire industry, as it hinders efforts to understand and learn from the RSGs’ failures.”

The SCE audit demand letter says that “[t]he contractual language requiring Mitsubishi to undergo this audit could not be clearer . . .: Section 1.9.6 of the contract gives [SCE] the right to ‘examine and copy’ Mitsubishi's ‘books, accounts, relevant correspondence, specifications, time cards, drawings, designs, and other documentation, to the extent that these are related and relevant to the Work under the Purchase Order[.]’”

In repeatedly refusing to submit to the audit, Mitsubishi has argued that this contractual language applies only to financial information necessary to support invoices. SCE’s demand letter characterizes Mitsubishi's excuse as “disappointing” and says that it “will only confirm the suspicion that Mitsubishi refuses to be transparent.”

Litzinger's letter concludes by saying that SCE “stands ready to begin the audit as soon as Mitsubishi advises that it will abide by the straightforward terms of the contract.”

In July, SCE filed a Notice of Dispute with Mitsubishi in an attempt to recover all damages caused by Mitsubishi’s failed design and manufacture of the San Onofre Replacement Steam Generators that led to the shutdown of the nuclear plant. SCE has also announced that it continues to reserve all of its rights as to any and all legal remedies available against Mitsubishi. Finally, SCE has made public key documents regarding the failure of the San Onofre Replacement Steam Generators in a Digital Document Library located at www.SONGScommunity.com/library, although the Digital Library remains incomplete because of Mitsubishi’s continued refusal to permit other key documents to be made public.

About Southern California Edison
An Edison International (NYSE:EIX) company, Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California. 

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10:24 AM Eastern 10/8/2012
ATOMIC POWER REVIEW
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Posted in mitsubishi, san onofre, sce, songs, steam generators | No comments

Sunday, 22 September 2013

NRC Finds Flaws in Mitsubishi RSG Design for San Onofre

Posted on 16:43 by Unknown
Those of us watching the San Onofre situation closely have been waiting for a good, solid hint, one way or the other as to which way the continuing situation between SCE and Mitsubishi would play out.  The matters covered in the release below may constitute a significant, if early, hint.

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(Press release from SCE, Sunday evening 9/22)

Media Contact: Media Relations, (626) 302-2255

SCE Announces that Nuclear Regulatory Commission Finds Flaws in Mitsubishi Heavy Industries’ Design that Led to Failed Steam Generators at San Onofre

ROSEMEAD, Calif., Sept. 22, 2013 — The Nuclear Regulatory Commission (NRC) has confirmed to Southern California Edison (SCE) that the NRC has identified flaws in how Mitsubishi Heavy Industries (MHI) used its computer codes to design the failed steam generators at the San Onofre Nuclear Generating Station (SONGS). The NRC further informed Southern California Edison that it is issuing a “Notice of Non-Conformance” against MHI for its flawed computer modeling in the failed design. The NRC is also citing SCE for failing to ensure that MHI’s modeling and analysis were adequate.

In particular, the NRC reports indicate that MHI’s use of its computer codes in the design of the steam generators inaccurately predicted thermal hydraulic conditions in the steam generators, leading to tube vibration and wear, and a steam generator tube leak. The NRC also found that MHI embedded the same computer modeling error in the design of steam generators at four other nuclear plants, although none developed the fluid elastic instability that caused San Onofre to shut down. The NRC inspection findings reinforce an NRC Augmented Inspection Team report a year ago that identified MHI’s computer modeling errors. The San Onofre units were permanently shut down in June.

Pete Dietrich, SCE senior vice president and chief nuclear officer, said it is not unusual for the NRC to cite the licensed operator of the nuclear plant as a responsible party even when problems are created by a vendor or contractor, and that SCE takes its licensee oversight responsibilities seriously. The NRC’s decision to also directly cite MHI reflects the fact that MHI created the flawed design and also failed to properly perform the verification and checking that SCE hired MHI to do.

“Mitsubishi designed the system. Mitsubishi built the system. Mitsubishi’s system failed. They are the experts. SCE was the customer,” Dietrich said.

“SCE is responsible for the safe operation of San Onofre and will continue to make safety our top priority as the plant is decommissioned,” Dietrich added. “MHI is accountable for its failure to provide properly functioning steam generators.”

Dietrich said SCE relied upon MHI, the qualified vendor authorized to design, manufacture and test the steam generators in accordance with American Society of Mechanical Engineers Code requirements, to meet specifications. Dietrich added that during the design of the steam generators, SCE appropriately questioned MHI about its design and use of computer models on multiple occasions. MHI repeatedly reassured SCE that its design and models were correct.

In its letter to SCE, the NRC also noted that MHI hired consultants with expertise in designing large steam generators, but that MHI did not rigorously evaluate their concerns about MHI’s computer modeling.

No financial penalties were imposed by the NRC.

On July 18, SCE served MHI with a Notice of Dispute http://www.songscommunity.com/docs/noticeofdispute.pdf for breach of contract and warranty for supplying defective steam generators that resulted in the permanent closure of San Onofre. The notice details MHI’s failures in designing the steam generators.

SCE announced June 7 that it would permanently shut down San Onofre Units 2 and 3, and begin the process to decommission the facility.

SCE has provided an online Digital Document Library containing thousands of pages of primary documents about the history of the design and testing of the Replacement Steam Generators, and a summary of design review minutes at http://www.songscommunity.com.

For more information about SCE, follow us on Twitter and on Facebook.

About Southern California Edison
An Edison International (NYSE:EIX) company, Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.

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BACKGROUND LINKS  (for further information)

SCE:  Rates not impacted by San Onofre (APR Sept. 8)

SCE Releases San Onofre documents (APR Sept. 7)

MHI Document Release by NRC, and evisceration of the claims by Boxer / Markey that "SCE and MHI knew the steam generators were bad."  My analysis of just the MHI documents, an injection of reality, and proof that Boxer and Markey have no idea what they're talking about.  Also contains many further informative links on steam generator design and testing (these are past APR articles as well.)

7:45 PM Eastern 9/22/2013
ATOMIC POWER REVIEW
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Posted in decommissioning, MHI, nrc, san onofre, sce, songs, steam generators | No comments

Wednesday, 24 July 2013

San Onofre Nuclear Generating Station Operating License to be Retired

Posted on 17:44 by Unknown
Press release courtesy Southern California Edison follows.

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Media Contact: Media Relations, (626) 302-2255


San Onofre Nuclear Plant Operating License to be Retired After Final Fuel Removal

ROSEMEAD, Calif., July 24, 2013 — The San Onofre nuclear plant has completed the final regulatory step required to formally retire its operating license.

Southern California Edison (SCE), majority owner of the nuclear plant, sent a letter to the Nuclear Regulatory Commission (NRC) on Tuesday certifying that fuel has been removed from the Unit 2 reactor. A similar letter for Unit 3 was submitted on June 28. Once the NRC certifies the Unit 2 defueling, the nuclear plant will have a “possession” license rather than an operating license, and will no longer be authorized to place fuel in the reactor vessel.

“While we have safely performed this kind of defueling work for four decades, the final removal of fuel from the Unit 2 reactor marks a significant milestone in San Onofre’s history,” said Pete Dietrich, SCE senior vice president and chief nuclear officer. “We are committed to remaining focused on public health and safety as we transition through decommissioning.”

The defueling of Unit 2 was completed on July 18. The 217 fuel assemblies were moved to the spent fuel pool where they will be stored and cooled until transferred to dry cask storage. The transfer was executed entirely under water by specialized equipment, as captured in this video.

SCE announced June 7 that it would retire San Onofre Units 2 and 3, and begin the process to decommission the facility. For more information about SCE, follow us on Twitter and on Facebook.

About Southern California Edison

An Edison International (NYSE:EIX) company, Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.

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Southern California Edison has constructed a new section on its SONGS website covering the topic of decommissioning the plant.  Click here to view it. 

Click here to see the NRC website's information on decommissioning of nuclear facilities.

8:45 PM Eastern 7/24/2013
ATOMIC POWER REVIEW
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Posted in decommissioning, san onofre, sce, songs | No comments

Monday, 1 April 2013

SCE Draft License Amendment for SONGS Unit 2 restart

Posted on 11:27 by Unknown
Press release from Southern California Edison follows:

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MediaContact: Media Relations, (626) 302-2255
Investor Relations Contact: Scott Cunningham, (626) 302-2540


SCE Submits Draft License Amendment for Nuclear Plant Unit 2 Restart
Amendment Submitted to Meet Customer Electricity Demand During Hot Summer Months

ROSEMEAD, Calif., April 1, 2013 — Southern California Edison (SCE) has voluntarily submitted a draft license amendment request to the Nuclear Regulatory Commission (NRC) for discussion. The draft is designed to support safely restarting Unit 2 of the San Onofre Nuclear Generating Station to address customer electricity demand and grid reliability concerns during the upcoming summer months. SCE is considering submitting a final amendment request after discussing it with the NRC staff at a public meeting Wednesday in Rockville, Maryland.

The draft license amendment request, if finalized and submitted for NRC approval, would support SCE’s plan to operate Unit 2 at 70 percent power for five months. Operating at 70 percent power prevents conditions that caused the tube-to-tube wear in Unit 3 that resulted in the nuclear plant being shut down since January 2012. SCE and three independent companies with expertise in nuclear generation have confirmed it is safe to operate the Unit 2 steam generators. The NRC has been evaluating these analyses, which are based on exhaustive testing and inspections, since October 2012.

“Since last fall, SCE has provided the public and the NRC with
detailed analyses from global experts that support safe restart of Unit 2,” said Ron Litzinger, SCE president.“We are considering the proposed voluntary amendment as the best path to get Unit 2 safely up and running before the hottest months of the year hit our region.”

SCE would be asking the NRC to act on the amendment before the end of May to facilitate timely restart of Unit 2 to meet peak summer electricity demand. Following the initial five-month operating period, SCE would shut down Unit 2 for steam generator tube inspections. Based on inspection data, Unit 2 would resume operation at 70 percent power for an appropriate operating period during the remainder of the 18-24 month fuel cycle while SCE updates its analysis to determine the appropriate long-term power level.

The San Onofre nuclear plant is the largest source of baseload generation and voltage support in the region and is a critical asset in meeting California’s clean energy needs. According to testimony filed by SCE for its General Rate Case and as part of a report prepared in 2010 by IHS Global Insight, operating the nuclear plant directly generates economic activity worth on average $2.2 billion per year. The impact grows to $3.3 billion per year if secondary economic effects are considered, which include the supply chain purchases of businesses supported by the nuclear plant and spending by those employed by the plant.

Both units at the San Onofre nuclear plant are currently safely shut down. Unit 2 remains shut down since it was taken out of service Jan. 9, 2012, for a planned outage. Unit 3 was safely taken offline Jan. 31, 2012, after station operators detected a leak in a steam generator tube.

More information is available at www.edison.com/SONGSupdateand at www.SONGScommunity.com. San Onofre is jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and the city of Riverside (1.79 percent). Follow us on Twitter (www.twitter.com/SCE) and like us on Facebook (www.facebook.com/SCE).

About Southern California Edison
An Edison International (NYSE:EIX) company, Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.
###

Jennifer Manfrè
Principal Manager, Media Relations
Southern California Edison
626-302-7964


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2:25 PM Eastern 4/1/2013
Atomic Power Review
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Posted in license amendment, nrc, press release, san onofre, sce, songs, southern california edison | No comments

Friday, 22 March 2013

SCE Considers Futher License Amendment for San Onofre Nuclear Generating Station

Posted on 09:35 by Unknown
Press release from Southern California Edison reproduced below. 

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SCE Considers License Amendment for San Onofre Nuclear Plant

ROSEMEAD, Calif., March 22, 2013 — Southern California Edison (SCE) is considering voluntarily submitting a license amendment request to the Nuclear Regulatory Commission (NRC) to support the restart of Unit 2 of the San Onofre Nuclear Generating Station. The amendment is consistent with SCE’s plan to operate the unit’s steam generators at 70 percent power as a conservative safety measure.

SCE is requesting a meeting with the NRC to discuss the possible amendment. This meeting, which would be open to the public, would provide an opportunity for SCE to discuss with the NRC the scope and content of a potential amendment to ensure it meets regulatory requirements. The meeting will also help SCE evaluate the nature and timeliness of the NRC process for review and approval of the amendment. Separately, SCE representatives have informed the Atomic Safety Licensing Board, the independent, adjudicatory arm of the NRC, of the company’s consideration of submitting a license amendment.

SCE would like to restart Unit 2 by the summer to meet peak customer demand for electricity. The San Onofre nuclear plant is the largest source of baseload generation and voltage support in the region and is a critical asset for reliability and in meeting California’s clean energy goals.

Last week, SCE submitted a detailed operational assessment requested by the NRC that supports safe operation of Unit 2 at 100 percent power for 11 months to answer a request from the NRC related to the plant’s technical specifications. Approval of that assessment would eliminate the need for the license amendment. However, because the NRC may take substantial time to review this operational assessment, SCE is simultaneously considering the license amendment.

“We want to do every responsible thing we can do to get Unit 2 up and running safely before the summer heat hits our region,” said Ron Litzinger, SCE president. “While the NRC continues to review the technical materials we’ve submitted, we’re considering a request for a license amendment so that we can pursue the best path to safe restart while avoiding unnecessary delays.”

If SCE pursues the amendment, it will submit a “No Significant Hazards Consideration” analysis demonstrating that the license amendment does not involve any significant safety risks. Regardless of whether an amendment or SCE’s 100 percent power operational assessment is approved, SCE will only operate Unit 2 at 70 percent power for an initial period of five months, following which the unit will be shut down for steam generator tube inspections.

Additional background information about the potential license amendment can be found at www.SONGScommunity.com.

NRC approval is required before SCE can restart Unit 2. The repair, corrective action and restart plan for Unit 2, along with additional technical information to address questions from the NRC, are available to the public at www.SONGScommunity.com

More information, including videos that explain how a steam generator works and the role San Onofre plays in providing reliable electricity to the region, is available at www.edison.com/SONGSupdateand at www.SONGScommunity.com. San Onofre is jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and the city of Riverside (1.79 percent). Follow us on Twitter (www.twitter.com/SCE) and like us on Facebook (www.facebook.com/SCE).

About Southern California Edison
An Edison International (NYSE:EIX) company,Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.
###

Jennifer Manfrè
Principal Manager, Media Relations
Southern California Edison
626-302-7964

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Recent publications by Will Davis on the San Onofre Nuclear Generating Station include the following:

March 15, 2013:  San Onofre debate more more public - and more technical (ANS Nuclear Cafe)

March 10, 2013:  San Onofre: MHI document release by NRC and what it really means (Atomic Power Review)

12:35 PM Eastern 3/22/2013
ATOMIC POWER REVIEW
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Posted in license amendment, MHI, mitsubishi, nrc, san onofre, songs, steam generators | No comments

Friday, 8 March 2013

SoCal Ed comments - MHI Evaluation of San Onofre Steam Generators

Posted on 14:24 by Unknown
3/8 -- Press Release below courtesy Southern California Edison.  A comment from me follows.

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Southern California Edison Comments on MHI Evaluation of San Onofre Nuclear Plant Steam Generators

Posted March 8, 2013 - 2:00 p.m. PDT
 
 
Media Contact: Media Relations, (626) 302-2255
 
ROSEMEAD, Calif., March 8, 2013 — An evaluation by Mitsubishi Heavy Industries (MHI) made public today cites ineffective tube supports, dry steam and high steam flow velocity as causes of excessive wear in the steam generators MHI supplied to Southern California Edison's (SCE) San Onofre Nuclear Generating Station.
SCE previously disclosed these same causes based on its own investigation, and the Nuclear Regulatory Commission's (NRC) augmented inspection team report last July found that MHI's use of faulty computer modeling in the design process caused MHI engineers to inadequately predict the dryness of the steam, measured by void fraction, in the replacement steam generators.
 
MHI repeatedly reassured SCE of the efficacy of the design. During the design phase of the project, MHI advised SCE that, based on its own review and analysis, the maximum void fraction that MHI expected to occur was acceptable, did not require additional design changes or measures, and that the replacement steam generators would perform as warranted.
 
"SCE's own oversight of MHI's design review complied with industry standards and best practices," said Pete Dietrich, SCE senior vice president and chief nuclear officer. "SCE would never, and did not, install steam generators that it believed would impact public safety or impair reliability."
 
In fact, MHI states in its root cause report (page 41), that its analysis of conditions in the steam generator during the design phase (which calculated void fraction and steam flow velocity) concluded that the thermal hydraulic conditions in the San Onofre steam generators were acceptable, and specifically that there was no need to reduce void fraction1.
 
Additionally, SCE never rejected a proposed design change to address void fraction based on its impact on compliance with 10 CFR 50.59.
 
"At no time was SCE informed that the maximum void fraction or flow velocities estimated by MHI could contribute to the failure of steam generator tubes," said Dietrich. "At the time, the design was considered sound."
 
SCE is disappointed that MHI decided on its own to redact some information in its evaluation about the flaws in the computer codes. However, the NRC publicly disclosed the computer code flaws three months before MHI completed its evaluation. In addition, the corrective actions and other statements included in the evaluation make it evident that there were problems with the computer modeling that failed to predict conditions that led to the tube-to-tube wear.
 
SCE has proposed operating Unit 2 at 70 percent to decrease velocity and decrease steam dryness to increase damping, thus preventing the conditions that led to excessive wear. The proposed restart plan was validated using a different computer model and has been reviewed by independent experts.
 
The San Onofre nuclear plant is the largest source of baseload generation and voltage support in the region and is a critical asset in meeting California's summer electricity and clean energy needs. Both units at San Onofre are currently safely shut down. Unit 2 remains shut down since it was taken out of service Jan. 9, 2012, for a planned outage. Unit 3 was safely taken offline Jan. 31, 2012, after station operators detected a leak in a steam generator tube.
 
NRC approval is required before SCE can restart Unit 2. The repair, corrective action and restart plan for Unit 2, along with additional technical information to address questions from the NRC, are available to the public at www.SONGScommunity.com
 
More information, including videos that explain how a steam generator works and the role San Onofre plays in providing reliable electricity to the region, is available at www.edison.com/SONGSupdate and at www.SONGScommunity.com. San Onofre is jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and the city of Riverside (1.79 percent). Follow us on Twitter (www.twitter.com/SCE) and like us on Facebook (www.facebook.com/SCE).
 
About Southern California EdisonAn Edison International (NYSE:EIX) company, Southern California Edison is one of the nation's largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.
1MHI Root Cause Analysis, page 41: T/H condition "was judged acceptable by FIV analysis" and "T/H analysis (FIT-III) did not indicate the necessity to reduce the high steam quality (void fraction)."
 
##########
 
NOTE FOR APR READERS:  I am presently reviewing the reports from MHI and will have further commentary posted on this blog over the weekend.
 
5:20 PM Eastern 3/8/2013
ATOMIC POWER REVIEW
 

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Posted in mitsubishi, nrc, san onofre, socal ed, songs, southern california edison, steam generator, steam generators | No comments

Wednesday, 27 February 2013

SCE Responds to Latest NRC Requests 2/26

Posted on 16:55 by Unknown
Below is a press release from Southern California Edison, regarding the ongoing San Onofre situation.

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Southern California Edison Responds to NRC Technical Questions

ROSEMEAD, Calif., Feb. 26 2013 — Southern California Edison (SCE) has submitted additional information requested by the Nuclear Regulatory Commission to continue discussion of the steps necessary to restart San Onofre Nuclear Generating Station Unit 2 and to address current compliance with the plant’s technical specifications.

The new information builds on the comprehensive analysis and restart proposal SCE submitted to the NRC in October 2012 in response to an NRC Confirmatory Action Letter (CAL). The submittal also provides information about how SCE anticipates addressing ongoing steam generator analysis and interim measures beyond the operating period proposed in SCE’s response to the CAL. SCE has proposed restarting Unit 2 at 70 percent power for five months to prevent the conditions that caused excessive tube wear in San Onofre’s steam generators.

The NRC has asked 32 detailed questions about the Unit 2 restart plan and is expected to pose more questions, known as Requests for Additional Information (RAIs). On Monday, SCE submitted a response to the NRC’s RAI 32 posed on Dec. 26, 2012, regarding compliance with San Onofre technical specifications requiring the ability to maintain steam generator tube integrity in the full range of normal operating conditions.

“This question and answer process is an important part of safety-based technical solutions in the nuclear industry, and it strengthens our ability to communicate to all stakeholders the safety principles and proven industry operating experience that the Unit 2 restart plan was built upon,” said Pete Dietrich, senior vice president and chief nuclear officer of SCE.

SCE’s independent global experts have already completed several operational assessments for Unit 2. In the RAI 32 response, SCE proposes to supplement those with an additional evaluation by March 15, 2013 to demonstrate that structural integrity can be met for Unit 2 at 100 percent rated thermal power. Even with this supplemental analysis, SCE intends to only operate at 70 percent power for five months before completing another set of thorough inspections.

“We are committed to being open and transparent as we move toward safe restart of Unit 2, and we look forward to discussing all our RAI responses with the NRC,” Dietrich said. The NRC will webcast the RAI meeting with SCE on Wednesday, Feb. 27. The NRC’s questions and SCE’s responses to the RAIs will be posted at www.SONGScommunity.com as they become available.
SCE’s restart plan includes evaluations from independent experts who completed more than 170,000 inspections to understand and address tube wear issues at San Onofre.

San Onofre is the largest source of baseload generation and voltage support in the region and is a critical asset in meeting California’s clean energy needs. Both units at San Onofre are currently safely shut down. Unit 2 remains shut down since it was taken out of service Jan. 9, 2012, for a planned outage. Unit 3 was safely taken offline Jan. 31, 2012, after station operators detected a leak in a steam generator tube.

More information is available at www.edison.com/SONGSupdate and at www.SONGScommunity.com. San Onofre is jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and the city of Riverside (1.79 percent). Follow us on Twitter (www.twitter.com/SCE) and like us on Facebook (www.facebook.com/SCE).

About Southern California Edison
An Edison International (NYSE:EIX) company, Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.

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7:55 PM Eastern 2/27/2013
ATOMIC POWER REVIEW

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Posted in nrc, san onofre, songs | No comments

Saturday, 9 February 2013

Tube Wear Insights from San Onofre Reviewed at NRC Meeting

Posted on 09:58 by Unknown
{SCE Press Release Courtesy Jennifer Manfre.}

Tube Wear Insights from San Onofre Nuclear Plant Reviewed at NRC Meeting
 
ROSEMEAD, Calif., Feb. 7, 2013—Southern California Edison (SCE) shared its analysis of the causes of steam generator tube wear at the San Onofre Nuclear Generating Station today at a Nuclear Regulatory Commission (NRC) meeting on industry steam generator tube wear issues.
The presentation to the NRC reviewed the extensive analysis by SCE and its independent global experts of causes of tube wear in San Onofre Unit 3 and the corrective actions to eliminate those causes in Unit 2.
“After extensive analysis from three independent experts, we are confident that we understand the causes of the tube wear and have taken the appropriate steps to prevent it in Unit 2,” said Pete Dietrich, SCE senior vice president and chief nuclear officer. During the NRC meeting in Rockville, Md, other nuclear industry vendors and the Electric Power Research Institute also made presentations on steam generator issues.
SCE determined the tube-to-tube wear in the Unit 3 steam generators was caused by a phenomenon known as fluid elastic instability. This phenomenon stems from three factors: high steam velocity, low-moisture conditions in specific locations of the tube bundles, and ineffective tube supports in the same locations. SCE has proposed operating Unit 2 at 70 percent to decrease velocity, increase damping and prevent fluid elastic instability.
San Onofre is the largest source of baseload generation and voltage support in the region and is a critical asset in meeting California’s clean energy needs. Both units at San Onofre are currently safely shut down. Unit 2 remains shut down since it was taken out of service Jan. 9, 2012, for a planned outage. Unit 3 was safely taken offline Jan. 31, 2012, after station operators detected a leak in a steam generator tube.
NRC approval is required before SCE can restart Unit 2. The repair, corrective action and restart plan for Unit 2, along with additional technical information to address questions from the NRC, are available to the public at www.SONGScommunity.com

More information is available at www.edison.com/SONGSupdate and at www.SONGScommunity.com.
San Onofre is jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and the city of Riverside (1.79 percent). Follow us on Twitter (www.twitter.com/SCE) and like us on Facebook (www.facebook.com/SCE).

About Southern California Edison
An Edison International (NYSE:EIX) company, Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.

1:00 PM Eastern 2/9/2013
ATOMIC POWER REVIEW

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Posted in san onofre, sce, songs, steam generators | No comments

Sunday, 26 August 2012

San Onofre - Notification of Unusual Event 8/26

Posted on 14:06 by Unknown
Roughly half an hour ago, SCE (Southern California Edison) reported by Twitter that operators at the shut down San Onofre Nuclear Generating Station ("SONGS") felt an earthquake in the control room.

At that time, SCE made a Notification of Unusual Event, per procedure, to local authorities and the State of California.

Both SONGS units remain safely shut down according to SCE's reports on Twitter. The two reactors have been shut down for some time while dealing with steam generator tube problems - a fact well documented on this website.

If there is any change in the plant's status, or significant updates, they will appear here. For now, follow the APR Twitter feed - @atomicnews - for news.

5:05 PM Eastern 8/26/2012
ATOMIC POWER REVIEW

At 5:00 PM Eastern, SCE tweeted: "No issues or concerns."

At 2:03 PM Local Time, SCE issued another Notification of Unusual Event after feeling a second earthquake at SONGS. No plant systems harmed, no risk to public safety, according to SCE. SCE will advise when Notifications are cleared.
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Posted in earthquake, san onofre, songs, unusual event | No comments
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Blog Archive

  • ▼  2013 (71)
    • ▼  October (5)
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      • Resin-based solution to Fukushima water problems
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