Concern about corrosion at Fukushima Unit 4 reactor building — ‘Prevention measures’ to be implemented (PHOTOS)

Published: February 14th, 2013 at 11:47 am ET


Title: Results of the Fourth Soundness Inspection of Unit 4 Reactor Building at Fukushima Daiichi Nuclear Power Station
Source: Tokyo Electric Power Company
Date: February 13, 2013

See Tepco’s handout here

Published: February 14th, 2013 at 11:47 am ET


Related Posts

  1. Reuters: Corrosion is weakening Fukushima Unit No. 4 — Concern quake to ‘topple’ bulging structure — Holds 14,000 Hiroshima bombs worth of cesium-137 August 14, 2013
  2. AP: Integrity of Reactor No. 4 building a major concern among experts — Collapse of spent fuel pool could be even worse than 3 reactor meltdowns February 3, 2012
  3. Official: Breach at Fukushima reactor blamed on saltwater corrosion — Over 75 tons of highly radioactive liquid flowing out everyday (PHOTOS & VIDEO) May 29, 2014
  4. More ‘Photoshop’ at Fukushima? Tepco finishes soundness inspection of Unit 4 (PHOTOS) February 13, 2013
  5. Tepco: “Significant density” of Alpha radiation leaking from Unit 3 at Fukushima — Steam seen at reactor building “likely to be leaked” from containment vessel August 14, 2013

39 comments to Concern about corrosion at Fukushima Unit 4 reactor building — ‘Prevention measures’ to be implemented (PHOTOS)

  • Time Is Short Time Is Short

    Hydrogen, or methane explosion?

    Here's a differing point of view from a Finnish nuke tech:

    Different. Now listen to this and see if it all doesn't start to tie in:

    At least watch the first one before it disappears. There's plenty of information to back up the second vid if it's removed.

  • Heart of the Rose Heart of the Rose

    It looks to me like the concrete is also involved in degradation.

    Concrete Degradation
    Radiation damages

    Exposure of concrete structures to neutrons and gamma radiations in nuclear power plants and high-flux material testing reactor can induce radiation damages in their concrete structures. Paramagnetic defects and optical centers are easily formed, but very high fluxes are necessary to displace a sufficiently high number of atoms in the crystal lattice of minerals present in concrete before significant mechanical damages are observed.

    Mortar..around here… we at least put up chicken wire first.

  • Heart of the Rose Heart of the Rose

    PS.Mortar won't fix what went wrong in that corner of Unit 4..
    April 24 2012

    Unit 4 Fukushima Soil Work Being Done Near Major Building Crack.

    Nor fix the instability after sinking 30 inches..originally.

    Japan Diplomat: Ground underneath Fukushima Unit 4 is sinking โ€” More than 30 inches in some areas โ€” Now in danger of collapse (VIDEO)

    Oct 7 2012..original statement Aug 3. 2012

    • Time Is Short Time Is Short

      The 'corrosion' is internal. No amount of Bondo is going to fix any of this.

      This is what is referred to as 'putting lipstick on a pig'.

  • razzz razzz

    When concrete is stressed, flexes or vibrations pass through, concrete can undergo spalling i.e. scaling, flaking. Rusting rebar will also cause concrete to release its bond and separate. Freezing will affect concrete if the concrete mix design isn't appropriate for conditions. Heat can dehydrate concrete affecting the curing of the cement. Then there is radiation affects.

    All these things happened or are happening at Fukushima.

    To compensate for all these effects, engineers over design everything making things bigger with more steel/rebar than its needs.

    They only need to buy time to unload Unit 4. Covering exposed rebar will keep the corrosive elements off it like ocean salt and moisture. Just need to sandblast the patch area clean first then apply special adhesive.

    Looks like some poor rebar placement to me when tied in place but it is over designed to begin with. Missing rebar would be a problem and even back in the 60s-70s they had the sense to wrap the upright rebar with outside horizonal hoops per the pic. California quakes had bridges falling down because specs didn't call for that.

    Water seeks its own level so the old Egyptian method to check elevations works.

    If the ground subsided it probably dropped as one.

    Hydrogen burns, doesn't exploded so I still don't understand what happened when the buildings blew apart besides steam and semi-nuclear possibilities.

    • Jay

      The wave shock going straight up seen in the famous video looks like the type generated by an explosive device OUTSIDE , not inside a building/enclosure …

      Any military here to confirm ?

    • Jay

      Bingo Razzz = the Hinderburg filled with hydrogen did not explode , it burned , the video was seen by billions …

      The dynamics of the Fukushima explosion resemble a small size device that Flattened the buildings FROM the TOP down … not an internal/inside-the-building explosion .

      The Vertical shock wave seen in the video does Not carries ANY DEBRIS !! … Can opener , please !

    • snowwy snowwy

      Razzz, watch this video to the end, I think it will clear up what hydrogen does once the mix with oxygen is right.

      • razzz razzz

        Thanks for that snowwy. Prof. is an idiot for not wearing earplugs. Makes me want to build a mockup of Unit 1 complete with thinned walled panels and fill it full of hydrogen. I suppose hydrogen was being produced faster than it could escape so it was under pressure before it ignited.

  • gottagetoffthegrid

    it could have been the earthquake that did that.

    for those old enough to remember the last big SanFran eq, when the bay bridge collapsed in '92(?). that is exactly what the bridge columns did: shed the covering concrete. this allowed the rebar to buckle and the columns turned to dust.

  • All I can say… is it seems that once again, nobody pays any attention to the data I have placed here to hand with regards to the #4 reactor building. Even after giving you the as-build blue prints and the complete geological workup. We still have such wild theories being advanced at this late a time…?

    I'm disappointed in the lot of you folks…

    • Jay

      Pattie , are dissapointed in me too ? After all I tried to support the observations .

      Please sumarise , thanks !

      See you later at Iori's ๐Ÿ˜‰

  • PhilipUpNorth PhilipUpNorth

    Pattie, this is a long overdue criticism:
    You do not explain your point of view well.
    You do not illustrate your point of view well.
    You do not provide corroborating evidence to support your point of view.
    (Pictures with arrows are not evidence.)
    You then blame us for not understanding you.

  • I've given the geological surveys. The plant blue's.. the whole issue about it sinking is due to wash-out. #3 & #4 are the deep-set foundations with rooms under them… and as they claimed #4 didn't have anything in core.. they didn't flood it with water. They ALSO didn't cut it off from the ocean! It's acting as a drain… reactors 1-4 are all connected under-ground… the soil is former ocean bottom, clays, volcanic-ash, and ejecta. That's all getting washed-out from under it.. but tip over..? collapse..? No, it can't due to all the connected works.. tilt some, yes.. and as it's framed like a pole-barn..? You get the "Panels" popping out when goes out of square. The break you all keep harping about was caused by a wet-transport cask full of plutonium breeder rods exploding.. one of 3 that did so.. of the 5 that were transferred into the building that day! Those are what caused all the deformations.
    They had a missile-warhead building shop inside area they keep doing photo-shop of… I've posted pics of all this stuff.

  • Heart of the Rose Heart of the Rose

    I don't recall harping… PattieB.
    Yes..I agree on all points.
    And having personally watched the CSFP..(see webcam thread archives)..I think the thing about unit a cat and mouse game.
    ..a 'fool's game'.

    PS..This is a visual are yours.

  • I even posted one of the missile missing the nose-part. In the after-mess first non-published photos tepco took.

    The fact it has 2 faults running through the site.. one by corner of 5 where it faces 6 and the other one between reactors 3-4. By putting that frame on south of 4… they added weight so it will now sink evenly.

    • elucidation_please

      "I even posted one of the missile missing the nose-part. In the after-mess first non-published photos tepco took."

      If I understand you correctly, you are claiming that you have a TEPCO photo, taken in the after-mess, that shows a "missile missing the nose part", correct? Can you please post a link to this photo?

  • But it.. just a show.. the shared pool has been the main show for past 2 years.. and public is clue-less.

    The bomb-project stuff gets air-lifted out on nights with bad views from TBS & The scam-cam tepco runs.

    We just had a volcanic event not 2 weeks ago.. that I tracked and we got seriously dumped on here in the states. The #3 corium was 4 kilometers down back in April of last year.. and so it hit the subduction zone and went BANG again!.. The seismologists now say the small plate Fuku is sitting on is crumbling. It's now got the #2 corium doing venting. These quakes are soon going to rupture the #5 reactor building. I posted a set on the cask storage below it that had sink-hole that swallowed half the cars in the parking lot..
    Is wide fissure runs west THROUGH the #5 reactor, and is what dropped the power line tower.

  • It's like watching the three stooges acting out being the keystone cops half the time!

  • I'm just in a piss-off state due to the fact that Pilgrim now seems to be in a slow-motion re-enactment of Fuku #1.. and it's the same type, and has 3500 rods in a pool built to hold 800.!!

    It's spewing out the same bad-valve fuku had.. so they replaced it with new style that won't stay closed.. and tons of other issues the thing has.. and they renewed the damned lic on it anyhow last year!

  • Proxy Error

    The proxy server received an invalid response from an upstream server.
    The proxy server could not handle the request GET /radnet-public/

    Reason: Error reading from remote server

    This type stuff and cut-off of radchick-radio.. and such stuff !

  • razzz razzz

    PattieB: There is a pic of an Aux white building with a pine tree in front of it and U3&4 in the background and the red boom pumper working on one of them. What building is that to have its wall panels blown out like that?

  • That's the original top wall portions of the shared pool building,,, if it's the one showing flaming rod-bits hitting the pumper… that the one you asking about?

  • dosdos dosdos

    Where's the no-see-ums when you need them?

  • That's the rare gas burning building.. and it's connected underground to 1-4 reactors. The pipes to it from # 1 & 2 have ruptured due to ground fissures. That's why they need new road be made to get access in front of #2. The ground is so bad in front of #1, that no heavy equipment can go over it! So they put the temp building cooler array there. And due to rads from 3 and death drive… you can't drive anything with a human at the wheel in from the south-side of the site.
    The busted pipes can't be fixed with robots.
    They were running the burner on this buildings roof, prior to the break.
    Trapping such stuff inside 1 & 2 is why they can't enter them… stuff is building up, and that temp rig isn't cutting the mustard!

    • razzz razzz

      When did the rare gas burning building blow off its wall panels?

      • it's what set-off the hydrogen… that led to the super critical EVENT that was #3's pool going up in a mushroom cloud! So, it was the same time #3 exploded… the white ash is radioactive ash that was all over the hillside behind it!

  • The burner on it's roof still works though.. and they need to now fix the pipes under-grounds to get it going again.

  • razzz razzz

    That white ash on the hillside reminds me of disintegrated concrete panels or lightweight roof concrete that blew out or fell back to earth after the explosion. It might be radioactive but they would have sprayed it with that blue-green mix to contain the dust, like they sprayed on everything early on.

    Nice job on all the pics, that is a lot of work.