Nuclear Engineer: Proof that fuel fragments were “sneezed” out of Unit 1 Fukushima Reactor and into Torus

Published: February 26th, 2013 at 11:00 am ET
By
Email Article Email Article
15 comments


Title:  UPDATE ON FUKUSHIMA
Date: February 21, 2013

Chris Harris, former licensed Senior Reactor Operator and engineer: Proof that fuel fragments were “sneezed” out of the Unit 1 Fukushima Reactor and into the Torus.

Source: Tepco

I don’t agree with Arnie’s analysis where he states that the fuel fragments have left the Containment based solely on radiation levels. Such radiation levels (92 R/hr) might come from a piece of fuel stuck inside the Torus. The gamma ray detector used by TEPCO would still be influenced by the strong radiation field right through the wall of the Torus.In the long run it doesn’t matter because the fuel fragments and byproducts are being transported outside the Containment and into filters in the make-shift cooling systems. This is why any core damage is intolerable. [...]

See also: Tepco presentation shows clumps of melted nuclear fuel outside containment vessel -- "Many unexpected situations are expected"

Published: February 26th, 2013 at 11:00 am ET
By
Email Article Email Article
15 comments

Related Posts

  1. Tepco finds 920 millisieverts per hour in Fukushima Unit 1 torus room — Gundersen: “There are fuel fragments outside the containment” February 20, 2013
  2. Fukushima workers drill new hole in Unit 2 torus — Tepco to check for melted nuclear fuel (PHOTO) January 28, 2013
  3. “Pile of sediments” filmed at Fukushima Unit 1 — Tepco taking sample from corner of torus room (VIDEO & PHOTOS) February 22, 2013
  4. “Impossible” that bulk of melted fuel is in Unit 1 containment — Charred vessel could indicate explosive event inside October 15, 2012
  5. Gundersen on Plutonium: I believe fragments of nuclear fuel are in the ocean — From explosions at Unit 3 AND Unit 1 (VIDEO) May 21, 2012

15 comments to Nuclear Engineer: Proof that fuel fragments were “sneezed” out of Unit 1 Fukushima Reactor and into Torus

  • We Not They Finally

    By now, any discussion about how/why fuel is out of containment, is like to-MA-toes and to-MAH-toes. It's all that genie that no one can put back in the bottle. What we'd like to see though, is more public explanations that WHEN fuel goes out of containment, the term "cold shutdown" makes no sense. How can you shut down what is no longer THERE? But instead is in a forever-radioactive place that no one can reach and no one can de-contaminate? Once the "cold shutdown" lie is that easily taken apart, myabe broader public education will become possible.


    Report comment

    • aSpadeisaSpade aSpadeisaSpade

      When Fukushima sneezes, the planet comes down with an ELE.


      Report comment

      • Jay

        'ASpadeisaSpade' , lovely reply dear , for the books !

        Talking to what happened to those darn rods , take another look at the explosion video and see :

        1) there are NO vertical flying debris INSIDE the raising Shock Wave … big can of worms IMHO

        2) the explosion pushed out the concrete walls leaving the gaps we see today

        All this must have reduced the Brittle rods to POWDER ! … which was sprayed by the blast everywhere specially and Mostly OUTSIDE mixed with the water spray …

        Try to imagine it while watching the video .


        Report comment

      • Speaking of sneezing, I'll just quote from the Travel section of The Epoch Times, Feb 21-27, 2013:

        "
        Masked Men

        The first memorable encounter was at my company's office in Tokyo. After conducting several uneventful interviews with many colleagues and business contacts, something unusual occurred. Someone we'd scheduled a meeting with came into our conference room wearing a very thick surgical mask and proceeded to keep the mask on during the entire interview!

        Our translator could barely understand a word he was saying.

        If you ever visit Japan, be prepared to see an uncomfortable number of surgical mask-clad people everywhere – including malls, places of business, and even when driving alone in their car.
        "

        I note that he does not elaborate on why people in Japan (Tokyo in this case) have to wear surgical masks.

        Probably because they're afraid they'll end up in a real sarcophagus if they don't.

        Sarcophagus:
        A sarcophagus is a box-like funeral receptacle for a corpse, most commonly carved in stone, and displayed above ground, though they may also be buried.


        Report comment

  • bwoodfield bwoodfield

    I would rather see a discussion on what can be done to start containing the ongoing radiation emissions. Are we looking at another sarcophagus??


    Report comment

    • AFTERSHOCK AFTERSHOCK

      to cover the entire island of Japan, bwoodfield? If you're going to suggest the use of a sarcophagus, will it be used to coverup the migrating coreums? If so, will that make the problem go away or simply buy more time for us to f-up what remains of the planet?


      Report comment

    • Time Is Short Time Is Short

      A sarcophagus would be too heavy for the site, and certainly impractical with the liquifaction taking place. This came up soon after 3/11.

      At this point, there is no stopping anything. Any future plans are what you decide to do with your own life, in whatever time we have left.


      Report comment

  • AGreenRoad AGreenRoad

    Total Fukushima Radiation Released Into Ocean, Air, Groundwater, Storage Tanks; via A Green Road http://agreenroad.blogspot.com/2012/02/total-fukushima-radiation-released-into.html

    Fukushima Spewing Equivalent of 112 Hiroshima Nuclear Bombs Worth of Radiation Every Hour; via A Green Road
    http://agreenroad.blogspot.com/2012/12/fukushima-spewing-equivalent-of-112.html


    Report comment

  • AGreenRoad AGreenRoad

    The nuclear industry has propoganda centers set up at all nuclear disaster sites and nuclear test sites, talking about how 'wonderful' nuclear power is, and how harmless radiation is…

    Since they allow and promote tourists wandering around inside of nuke bomb craters, Hiroshima, Nagasaki, Chernobyl, etc.. How bad can it be?

    What you cannot see, smell or hear, you cannot fear. It is FAR easier to sell lies than the truth.


    Report comment

  • AGreenRoad AGreenRoad

    There is also a LOT more money in selling lies than the truth..

    There is no money in selling truth.. most people prefer lies and will pay to hear them. Most of what is on the boob tube is lies and propoganda, or dogma of some kind.

    Truth? Not worth a dime… most refuse to listen to it, and may even attack the person bringing it.

    Some of the most famous and honest truth tellers were assassinated.

    Jesus Christ

    Martin Luther King

    Gandhi

    President Kennedy

    just to name a few…

    What would JC say about nuclear power, nuclear bombs and nuclear accidents?


    Report comment

  • PhilipUpNorth PhilipUpNorth

    Some thoughts on a sarcophagus:
    1. Mudrock will support such a building. Take a look at the Burj Dubai, which is built on sand.
    http://www.dekhloindia.com/wp-content/uploads/2010/04/Burj-Dubai-Skyscraper.jpg
    The sarcophagus will be buttressed, of course, as was done at Chernobyl.
    2. The real problem is the foundation. The foundation of the sarcophagus MUST enclose Corium1,2,&3. If the bottom of the foundation is above the level of the corium, then the corium will continue to vent into the atmosphere. Smoke and radioactive gasses will simply travel horizontally beyond the footings, then follow fissures to the surface. So if the corium has penetrated too deeply into the mudrock, a sarcophagus won't work. (Where is the corium, TEPCO?)
    3. Water as a closed loop heat sink: Picture a rectangular concrete foundation, surrounding Buildings1,2,3,&4. On the Ocean-side, drill a series of ground water extraction wells, within the perimeter of the foundation, to shallow depths below the level of the corium. (Assuming that the corium in the mudrock is above the bottom of the foundation excavation). The ground water will be cooled in cooling towers, built nearby. The water will then flow back into a series of shallow injection wells drilled just uphill from Buildings1,2,3,&4, within the perimeter of the foundation. This will keep highly contaminated ground water from flowing into the Pacific Ocean.


    Report comment

    • PhilipUpNorth PhilipUpNorth

      (Cont'd)
      4. Liquid nitrogen to freeze corium: An alternative to water cooling is a system using liquid nitrogen, which also assumes the bottom of the foundation is below the bottom of the corium. A series of horizontal holes is drilled underneath the coriums, from the Ocean-side of the floor of the foundation excavation, to the uphill-side of the floor of the foundation excavation. A manifold connects these pipes together. A pump room and refrigeration system keeps the nitrogen flowing, and keeps it in liquid form. The liquid nitrogen freezes the corium in place, and stops its downward migration.
      5. The foundation excavation is now filled with borated, reinforced concrete.
      6. All spent fuel is removed from SFP1,2,3,&4, and common SFP, and placed in long term storage built at the nuke complex.
      7. Containment Vessels and Reactors1,2,3,&4 are filled with borated sand.
      8. SFP1,2,3,&4 and CSFP are filled with borated sand.
      9. A base for the sarcophagus is poured on top of the ground within the foundation. A rubber membrane is incorporated within this base to contain venting should large earthquakes crack the base concrete.
      10. The sarcophagus is now built on the foundation.
      Easy as pie. Could be completed by the end of 2017.
      (If the corium is hundreds of feet below ground level, probably not a lot can be done, and a sarcophagus would be pretty useless in containing the radiation releases.)


      Report comment

  • Fury Fury

    The "corium" has already stopped moving if it ever did!! How many times are you going to stop it at the same place? Inside the reactor vessels! Liquid niytrogen?! Has to be refrigerated constantly?!! Hoses break , leaketc.!


    Report comment

  • Fury Fury

    And the spent fuel is stable and safe where it is at. Leave it there till everything else is cleaned up…! Leave it alone before something goes wrong while moving it!.


    Report comment

  • WELL!… since one of the corium (Believed to be #3's) was @ 4 km deep back in April of last year…(2012) I don't think you guys are keeping up with the facts here… and as such? Your suggestions on actions pertaining to solutions don't hold any merit as far as I can see.

    #1 corium with this last investigation is now transitioning through the thicker of the water bands and generated a radioactive steam volcano under the remains of the plant, and is venting @ 85-90 psi out the rare gas collection pipes. That puts it to deep now to recover, and it was the smallest one. That would sink slowest.

    They have the equipment there and are actively tracking them in the ground. They just won't explain how bad things are.. and the plan is to let them get into the subduction zone. Problem is, one has already,… BOOM!.. and we had the resultant quake and mega-vent-event that results. We now have rad-steam exiting the ground more than 60 km from the plant in a few places.

    The geology folks are shitting themselves. The last comment from them was that the entire fuku plate was crumbling. There are now 3 rather large fissures on site, one runs right under #5 reactor, and down into the dry-cask storage parking-lot. It ate half the cars during the quake that were parked there.

    O' DO try to keep up..!


    Report comment

You must be logged in to post a comment.