Tepco: No. 4 reactor building can withstand 6-plus intensity quake -Asahi

Published: August 31st, 2012 at 7:22 am ET
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(Subscription Only) Title: TEPCO: No. 4 reactor building can withstand 6-plus intensity quake
Source: THE ASAHI SHIMBUN
Date: August 31, 2012

The heavily damaged No. 4 reactor building and its spent fuel pool at the Fukushima No. 1 nuclear plant can withstand earthquakes with intensities of upper 6 on the Japanese scale of 7, Tokyo Electric Power Co. said Aug. 30.

The utility said it confirmed the strength of the building after conducting a seismic analysis.

[…]

TEPCO said it found no major damage in walls supporting the storage pool on the top floor.

It also said the building now has almost the same strength it had before the disaster because the removal of rubble created by the explosion has decreased its weight.

[…]

Published: August 31st, 2012 at 7:22 am ET
By

25 comments

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  1. Tepco on risk at Unit No. 4: Spent Fuel Pool can withstand up to a lower-6 intensity quake without collapsing May 11, 2012
  2. Tepco Makes “Critical” Admission: Fukushima Unit 4 quake testing “does not take horizontal shaking into equation” — Claims it can withstand a “6+” quake only apply to VERTICAL shaking September 5, 2012
  3. Ambassador’s comments translated by Asahi: Another accident at No. 4 reactor building could cause the “final catastrophe of the world” May 21, 2012
  4. “It’s Leaning”: Japan nuclear engineer concerned about collapse of Reactor No. 4 — Oxidation must have weakened building material… MORE January 3, 2012
  5. Report: Maximum bulge in No. 4 reactor building 40% larger than previously stated in Tepco data June 25, 2012

25 comments to Tepco: No. 4 reactor building can withstand 6-plus intensity quake -Asahi

  • odylan

    According to Tepco reactor no. 4 can withstand a 6.0 earthquake.

    That's not good enough.

    Recently in the sea to the north of Japan there was a 7.7 earthquake.

  • TheBigPicture TheBigPicture

    We need outside (unbiased) experts to check and report on the status of this plant.

  • BreadAndButter BreadAndButter

    Well, Tepco, I hope we'll never find out.
    The concrete structure is one thing – the miles of plastic piping for cooling, the duct tape constructs and quick-fix connections are a completely different story.
    What's the use if the SFP keeps standing, but can't be cooled anymore?
    Facepalm.

  • richard richard

    That's ok then, just gotta avoid anything bigger for a few decades or centuries, no problem.

    Good luck.

  • Coincidence Theorist

    Who else has a hard time understanding the logic of this report?

    • Coincidence Theorist

      It implies that tepgo is satisfied and not pursuing restructuring or bracing of these buildings! THERE IS NO PURSUIT TO STURDY THAT PLACE UP! WOW FU PUNKS

  • Heart of the Rose Heart of the Rose

    What building? WHAT building?
    They mean that leaning,burnt-out shell of a building?
    We (I) hate being spoken to like we're fools.
    It's all better under the tarp..what happen?..they prop it up with dead workers?
    Do we get to see the new control room? the new pristine containment?
    So what?..contaminate the world with radiation..and talk BS at the same time.. as though they are to be believed?
    TEPCO is the fool.

  • PhilipUpNorth philipupnorth

    7.9 EQ off Philippines at 33km depth! Big one!

  • CB CB

    A tsnumai warning is in effect.

  • PhilipUpNorth philipupnorth

    TSUNAMI BULLETIN NUMBER 001
    PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
    ISSUED AT 1255Z 31 AUG 2012

    THIS BULLETIN APPLIES TO AREAS WITHIN AND BORDERING THE PACIFIC
    OCEAN AND ADJACENT SEAS…EXCEPT ALASKA…BRITISH COLUMBIA…
    WASHINGTON…OREGON AND CALIFORNIA.

    … A TSUNAMI WARNING AND WATCH ARE IN EFFECT …

    A TSUNAMI WARNING IS IN EFFECT FOR

    INDONESIA / PHILIPPINES / BELAU / YAP / TAIWAN / JAPAN / GUAM /
    N. MARIANAS / PAPUA NEW GUINEA

    A TSUNAMI WATCH IS IN EFFECT FOR

    CHUUK / MARCUS IS. / KOSRAE / POHNPEI / MARSHALL IS. /
    WAKE IS. / SOLOMON IS. / RUSSIA / NAURU

    FOR ALL OTHER AREAS COVERED BY THIS BULLETIN… IT IS FOR
    INFORMATION ONLY AT THIS TIME.

    THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES. ONLY
    NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE
    DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND
    ANY ACTIONS TO BE TAKEN IN RESPONSE.

    AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

    ORIGIN TIME – 1248Z 31 AUG 2012
    COORDINATES – 10.9 NORTH 127.1 EAST
    DEPTH – 33 KM
    LOCATION – PHILIPPINE ISLANDS REGION
    MAGNITUDE – 7.9

    EVALUATION

    IT IS NOT KNOWN THAT A TSUNAMI WAS GENERATED. THIS WARNING IS
    BASED ONLY ON THE EARTHQUAKE EVALUATION. AN EARTHQUAKE OF THIS
    SIZE HAS THE POTENTIAL TO GENERATE A DESTRUCTIVE TSUNAMI THAT CAN
    STRIKE COASTLINES NEAR THE EPICENTER WITHIN MINUTES AND MORE
    DISTANT COASTLINES WITHIN HOURS. AUTHORITIES SHOULD TAKE

  • PhilipUpNorth philipupnorth

    M7.9 EQ: NOAA Tsumani Center has issued tsumani watch. The link for above is:
    http://ptwc.weather.gov/ptwc/text.php?id=pacific.TSUPAC.2012.08.31.1255

    This is a major quake, folks, in the deep ocean trench off the Philippines. Depending on the motion, a dangerous tsumani may be heading towards Samar Island and southern Philippines Islands.

  • PhilipUpNorth philipupnorth

    Tsunami station in event mode. Seven buoys in wastern Pacific Ocean are in event mode right now.
    http://www.ndbc.noaa.gov/

  • hbjon hbjon

    Huge earthquake this morning in the Phillipines. 7.9

  • 3C

    Please post this report with the signatures of it's creators and
    accepters. They can be first in line to assess the damage after
    each M5 Quake.

  • PhilipUpNorth philipupnorth

    If you live on the East Coast of the southern Phillipine Islands, it's a good day to take that road trip into the mountains. Lock your doors and go now. The 7.9 EQ is in the deep ocean. Any tsumani generated by this quake will come up the steep slope of the ocean floor off the Philippines, and pile up in the offshore shallows. There has been much flooding of the Philippine Islands in recent months due to the encroachment of the ocean/global warming/sea level rise/plate tilt/rain/typhoons. A tsunami and major quake damage is certainly not needed. Good luck to all who live in the Philippines.

    • PhilipUpNorth philipupnorth

      Tsumani warnings lifted for Japan and other locations around the Pacific Rim. Quake downgraded to M 7.6, still a large EQ. Be alert for compensation earthquakes and aftershocks up and down the Pacific Rim over the next week or two.

  • patb2009

    TEPCO lies patholigically but they always have a tell you can follow.

    "TEPCO said it found no major damage in walls supporting the storage pool on the top floor.

    It also said the building now has almost the same strength it had before the disaster because the removal of rubble created by the explosion has decreased its weight."

    What they mean is they say the building has the same "Strength to static load ratio" after removing 30-50% of the dead structure. So they removed 2 decks of panel, strucutre and the roof material.

    That means the structure has lost 30-50% of it's sttic strength. or some reasonable fraction of the beams are failed.

    Now how much of the dynamic strength is lost? Probably a lot more. A dynamic event moves load paths around, wehter it's a quake or a cyclone.

    Oh Japan is back in Cyclone season. (Typhoons to them). Hurricanes to us.

    • Radio VicFromOregon

      patb2009, thanks for the clarification! They also aren't mentioning the fatigue on the materials with each subsequent quake, however small. Everybody in the nuclear industry, not just TEPCO, leaves that out of their equations. But, in the land of the earthquakes, Japan, that ought to be a little harder to pull off. We'll see what the reaction is, no pun intended. TEPCO is having a harder sell in many quarters with every bit of "good news" they announce.

  • CaptD CaptD

    Japanese Leaders are living in Nuclear Denial*…

    So what happens if they get a shallow nearby 7+
    EOLAWKI
    End Of Life As We Know It?

    * http://is.gd/XPjMd0

    The illogical belief that Nature cannot destroy any land based nuclear reactor, any place anytime 24/7/365!

  • norbu norbu

    There have been 16 C.M.E. in the last 8 days may have have a effect on Earth. http://sohowww.nascom.nasa.gov/

  • razzz razzz

    Don't confuse the two scales.

    Japan uses their own earthquake scale where it tops out at 7, I guess because anything higher and you won't live through it anyway.

    The renamed US Richter scale tops out at 10, because I guess they figure anything greater than that and earth goes off axis and out of obit then crashes into the sun.