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ENER APNewsBreak: Report warns of nuke risk in Calif.
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  1. #1

    APNewsBreak: Report warns of nuke risk in Calif.

    This story is taken from Sacbee / Our Region / Top Stories

    APNewsBreak: Report warns of nuke risk in Calif.
    Associated Press
    Published Tuesday, Mar. 27, 2012

    LOS ANGELES -- The utility that runs California's San Onofre nuclear plant misled federal regulators about equipment and design changes that are the likely cause of extensive wear on tubing that carries radioactive water, a report commissioned by an environmental group claimed Tuesday.

    The report by nuclear consultants Fairewinds Associates warned that a more detailed study is needed on the alloy tubing in the plant's steam generators before the twin reactors at San Onofre are restarted, according to a copy obtained by The Associated Press.

    The study was produced for nuclear watchdog Friends of the Earth and was authored by engineer Arnie Gundersen, a former nuclear industry executive who was a licensed reactor operator.

    A series of untested equipment and design changes to the massive generators "created a large risk of tube failure at the San Onofre reactors," the report found, citing a review of publicly available records.

    Since the alterations, the plant has "experienced extraordinarily rapid degradation of their steam generator tubes," it said, adding that such rapid wear can raise the potential for an accident that could release radioactivity.

    Southern California Edison, which operates the plant, said through a spokeswoman that the company would not comment until the report had been reviewed.

    NRC spokesman Scott Burnell said in a statement that the agency was aware on the design changes.

    The company "had to show by analysis that their design was acceptable. All the information available at that time showed the replacement steam generators would meet our requirements for safe operation," Burnell said.

    Gundersen said he believed the additional tubes were a way to allow SCE to set the stage to generate more power at San Onofre while avoiding more scrutiny from regulators.

    "They made too many changes. The only thing I can conclude is the ultimate goal was a power upgrade, to squeeze more power out of the plant," he said.

    A team of federal investigators is trying to determine the cause of unusually heavy wear on hundreds of tubes at the seaside plant, located about 45 miles north of San Diego. The federal agency has said the plant will remain shut down until the cause of the wear is found and corrected.

    The problems have raised questions about the integrity of replacement generators the company installed at the two reactors in a multimillion-dollar makeover in 2009 and 2010.

    Unit 3 was shut down as a precaution in January after a leak sprung in a tube carrying radioactive water, and extensive wear was found on tubing in its twin, Unit 2, which has been shut down for maintenance and refueling.

    Traces of radiation escaped during the January leak, but officials said there was no danger to workers or neighbors.

    Nearly 20,000 tubes are in each of the two reactors. Following the leak, tests found that seven tubes that carry radioactive water from the reactor were in danger of rupturing under high pressure in Unit 3. The company has said a total of 321 tubes will be plugged and taken out of service at the two reactors, well within the margin to allow them to keep operating.

    No date has been set to restart the reactors.

    Among the modifications to the generators, the report said the alloy was changed, bracing was redesigned and more tubes were added. The company never disclosed that such extensive changes were made, instead describing it as an exchange of similar equipment, the report said. That allowed SCE "to avoid the requisite NRC oversight of a steam generator replacement process," the report said.

    Without more detailed study, it "defies logic" to consider restarting either plant, the report added.

    Inside a steam generator, hot pressurized water flowing through bundles of tubes heats a bath of non-radioactive water surrounding them. The resulting steam is used to turn turbines to make electricity.

    The tubes are one of the vital barriers between the radioactive and non-radioactive sides of the plant. If a tube breaks, there is the potential that radioactivity from the system that pumps water through the reactor could escape into the atmosphere.

    Serious leaks also can drain cooling water from a reactor.

    The steam generators were manufactured by Japan-based Mitsubishi Heavy Industries, according to company officials.

    Fairewinds is a Vermont-based consultant that has worked with groups critical of nuclear power.
    So be strong and courageous! Do not be afraid and do not panic before them. For the Lord your God will personally go ahead of you. He will neither fail you nor abandon you.

  2. #2
    Join Date
    Nov 2003
    Between Holy & Crap
    Thanks, Mo. I just don't have enough energy anymore to worry about EVERYTHING that's happening. It's all so discouraging.

    So when's the Revolution? God or Money? Choose.

  3. #3
    Associate Press picked a poorly worded title for the sake of sensationalism, something like what the National Enquirer would do.

    I would suggest,

    Report warns risky upgrades to Nuke Power plant

  4. #4
    Join Date
    May 2004
    20 miles from Mt Lassen in N Cal
    Quote Originally Posted by Double_A View Post
    Associate Press picked a poorly worded title for the sake of sensationalism, something like what the National Enquirer would do.

    I would suggest,

    Report warns risky upgrades to Nuke Power plant
    That was my thought. The jihadis were going to set off nukes.

  5. #5
    Gunderson knows what he is talking about. He worked in the nuke field for decades.
    Audio Bhagavad Gita downloadable

    This knowledge is the king of education, the most secret of all secrets. It is the purest knowledge, and because it gives direct perception of the self by realization, it is the perfection of religion. It is everlasting, and it is joyfully performed.

  6. Let California suffer. Of course, they'll naturally want the nation to pay for theri screwups.

  7. #7
    Join Date
    Sep 2005
    Quote Originally Posted by Be Well View Post
    Gunderson knows what he is talking about. He worked in the nuke field for decades.
    Sorry to break this to you, Be well, but if you check into Arnie Gundersen you will find he operated a 100 watt teaching reactor for less than a year and has inflated his resume in other ways.

  8. #8
    Quote Originally Posted by American Rage View Post
    Let California suffer. Of course, they'll naturally want the nation to pay for theri screwups.
    What are you talking about?


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