New data shows Fukushima Daini nuke plant prepared to vent steam from all four reactors — Feared that containment vessels might be damaged by pressure

Published: August 10th, 2011 at 4:37 pm ET


No. 2 N-plant was prepared for venting, The Yomiuri Shimbun, August 10, 2011:

Preparations for opening the vents of nuclear reactors to prevent hydrogen explosions were made at the Fukushima No. 2 nuclear power plant […] to release steam accumulated in the containment vessels.

On the day of the disaster, the Nos. 1, 2 and 4 reactors suffered damage to cooling pumps, the data showed. It was feared that the containment vessels might be damaged as pressure built up inside.

Preparations were being made to open the vents of the vessels at all four reactors, including the No. 3 reactor, on March 12. But venting operations did not actually take place as the temperature of the reactors was successfully lowered […]

Published: August 10th, 2011 at 4:37 pm ET


Related Posts

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  3. ANOTHER NUKE PLANT: Fukushima Daini has 3,000 tons of radioactive water in reactor buildings June 7, 2011
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26 comments to New data shows Fukushima Daini nuke plant prepared to vent steam from all four reactors — Feared that containment vessels might be damaged by pressure

  • goatherdjim

    “containment vessels might be damaged as pressure built up inside.”

    Is this a joke? Containment vessels have been damaged since 3/11, TEPCO is clueless and the Japanese government is relying on them to do the right thing.

    Sounds like a page from the Katrina playbook. Maybe they could get BP to help out, that would fix everything they could just apply a blackout to the entire region and say everything is OK.

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  • arclight arclight

    “The data also showed that at the Nos. 5 and 6 reactors of the No. 1 plant, holes to reduce pressure were made in the upper areas of reactor buildings to prevent hydrogen explosions.
    (Aug. 11, 2011)”

    this means 5 and 6 had partial meltdowns…isnt the hydrogen from the destroyed zerconium cladding?

    • Dr. Anne Lee Tomlinson Maziar anne

      Fukushima Daini is 5 or 6 miles north of Fukushima Daiichi. It has 4 reactors, 3 of which have been reported to be in the same condition of #4 reactor at Fukushima Daiichi (#1 Fukushima nuclear power plant). Fukushima Daini is #2 Fukushima nuclear power plant.

      Here are the lat and long of the two different power plants:

      Fukushima #1 37.233 141.015; Fukushima #2 37.317 141.026

      • Dr. Anne Lee Tomlinson Maziar anne

        Fukushima Daini Nuclear Power Plant
        From Wikipedia, the free encyclopedia
        Not to be confused with Fukushima Daiichi Nuclear Power Plant.
        Fukushima II Nuclear Power Plant

        The Fukushima II NPP

        Location of Fukushima II Nuclear Power Plant
        Country Japan
        Locale Naraha

        Coordinates 37°18′59″N 141°1′32″ECoordinates: 37°18′59″N 141°1′32″E

        Status Out of service
        Construction began March 16, 1976
        Commission date April 20, 1982
        Operator(s) Tokyo Electric Power Company

        Constructor(s) Kajima

        Reactor information
        Reactors operational 4 x 1,100 MW

        Reactor type(s) BWR

        Reactor supplier(s) Toshiba

        Power generation information
        Installed capacity 4,400 MW

        Home page, Real time monitoring

        As of March 14, 2011
        The Fukushima II Nuclear Power Plant (福島第二原子力発電所 Fukushima Dai-Ni ( pronunciation) Genshiryoku Hatsudensho?, Fukushima II NPP, 2F), or Fukushima Dai-ni (dai-ni means “number two”), is a nuclear power plant located on a 1,500,000-square-metre (370-acre) site[1] in the town of Naraha and Tomioka in the Futaba District of Fukushima Prefecture, Japan. The Tokyo Electric Power Company (TEPCO) runs the plant.
        After the 2011 Tōhoku earthquake and tsunami, the four reactors at Fukushima II automatically shut down.[2]
        Japan’s worst nuclear accident occurred at TEPCO’s Fukushima I Nuclear Power Plant, or Fukushima Dai-ichi, a 11.5 kilometres (7.1 mi) boundary to boundary road journey to the north,[3] after the same March 11 earthquake.

      • Dr. Anne Lee Tomlinson Maziar anne

        Reactors # 5 and 6 are part of Fukushima Daiichi. Altogether at both nuclear power plants there are 10 reactors.

        On the live cam we only see reactors #1-4 of Fukushima Daiichi and the Central Waste Radiation Treatment Facility in the far distance to the right of these reactors.

        We never (except for June 4 time lapse) see the Common Spent Fuel Pool. We never see #5 and 6.

        We have never see the second power plant (another 4 reactors) of Fukushima Daini which was actually closer than Daiichi to the Mar.11 earthquake.

      • Dr. Anne Lee Tomlinson Maziar anne

        Daiichi in English means First.

        Daini in English means Second.

      • Misitu

        I thought that Daiini was SOUTH of Daiichi. Going to have a look chaps.

  • Bob Hardin Bob Hardin

    From the article: “TEPCO did not have to open the vents because it repaired the cooling systems in time.”

    So why is this newsworthy?

    • suzie-Q

      I’m sorry I hit the report button by mistake when I meant to re-read the article.

      I do have a question though: is this newsworthy because it will release an even higher level of radioactivity than they are already seeping into the environment on an ongoing basis?

  • Dr. Anne Lee Tomlinson Maziar anne

    According to the following report the reactors at Fuku Daini ARE NOT YET stabalized:

    Tokyo Elec. Power : (Aug 09,2011)Plant Status of Fukushima Daini Nuclear Power Station (as of 3:00 pm, August 9)

    “As of 4:00 pm on August 8, Units 1 to 4 remain in a cold shutdown (please refer to the appendix). We will make our best efforts to stabilize each plant.”

    • bigisland bigisland

      Fianlly, mo’ folks ARE paying attention!!! No one seems to remember Daini that is over the hill fm Fukushima, run by the military which most likely does sales thru the Japanese mafia. You wonder what comes out of these plants? HELLOOOOO

  • Tanuki San

    The article says: “Following the earthquake and tsunami, TEPCO opened the vents at the Nos. 1 to 3 reactors of the Fukushima No. 1 nuclear power plant. But hydrogen explosions and other accidents occurred at these reactors as well as the No. 4 reactor.”

    I don’t know how nuclear plants work, but the wording here seems to imply that opening the vents caused the explosions/accidents. I wonder if that’s why they’re concerned about opening the vents? Who knows.

    • Misitu

      Arnie Gundersen had something to say about the vents being a late addon with inadequate “due diligence” and consequently at risk of malfunction, which risk was actually encountered by the unit 1 hydrogen explosion and possibly by the other two explosions (though I am unconvinced that venting was a major contributor anyway for unit 3, and unit 2 remains a mystery)

  • pg

    Told you all. I read 3 days after the EQ that radiation was released from one reactor and a fire was at another (Daini). Radiation doesn’t “release” unless there is a breech.

    Also, Oganawa sustained damage, lost 2/3 of its grid, had cracks in the spent pool cooling tanks.

    Read all that news within the first week then it all went missing.

    That is prolly why the web cams all were fixed at Daitchi. To keep eyes fixated there.

    • Steven Steven

      Daiini had a 10km exlusion zone around it, which was almost immediately superceded by the 20km zone around Daiichi, Since then it just dropped off the radar.

      And btw anne, Daiini is south not north of Daiichi.

  • norbu norbu

    Do you think this means that another series of melt downs is coming? What the h***. Someone needs to step up and wake these people up. How can they walk around with there head’s up there a**. No wonder they cant see how bad this! Its time to be real about this. They have known this and think plutonium is like salt? That is beyond human thought. I am sorry for the people.

  • Sickputer

    The Japanese scientist on the Internet radio interview the other night said every square inch of Honshu island is already contaminated. He was bringing his own food in a flight from Hong Kong to Tokyo becuae he didn’t trust the food supplies or water in Japan anywhere.

    He went into great detail about the ranchers in southern Japan saying they had bought rice straw from Fukushima that made their cows infected. He notes that is almost certainly a lie because they would never buy rice straw in large bundles from so far away because the toll road fees for trucks is outrageous in Japan. They wanted to deflect the fact the rice straw came from their prefecture in far southern Japan. He also suspects Hoikkado island is badly contaminated.