Kyodo: Concern about condition of Fukushima Unit 4 — Fuel rods may get dumped onto ground and burn up in quake — Tepco ‘hastening’ removal

Published: December 3rd, 2012 at 8:11 pm ET
By
Email Article Email Article
19 comments


Title: Tepco moves up nuclear salvage schedule for Fukushima fuel rods to 2014
Source: Kyodo
Date: Dec. 4, 2012

Tepco moves up nuclear salvage schedule for Fukushima fuel rods to 2014

[...] The schedule was moved up by a year amid lingering concerns about the condition of the unit [...]

The upper part of the building housing reactor 4 was severely damaged by a hydrogen explosion caused by the meltdowns, sparking concern the remaining structure might collapse in another big quake and dump the pool and its rods onto the ground.

The fuel rods, exposed to the air, might then burn up and release massive amounts of radiation into the atmosphere. Some experts dispute this possibility. [...]

To hasten the process, the utility plans to use two containers instead of one as earlier planned to transport the assemblies to a so-called common pool in a different building at the site. This is expected to provide more stable conditions for keeping the fuel cool. [...]

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

Published: December 3rd, 2012 at 8:11 pm ET
By
Email Article Email Article
19 comments

Related Posts

  1. Yale Professor: Fukushima Unit 4 pool in perilous condition — “All of humanity will be threatened for thousands of years” if not able to be kept cool — Danger of collapse during storm or while attempting removal of fuel rods September 20, 2013
  2. NHK: Fuel removal at Unit 4 underway — BBC: Concern casks not watertight, rods would contact air — WSJ: Exposure to air can cause sustained nuclear reaction — AFP: Tokyo evacuations if uncontrolled nuclear conflagration? AP: Rods contain plutonium, experts concerned quake to hit during process November 18, 2013
  3. Tepco Adviser: “Everyone in the world” will be safer if fuel rods transferred from Fukushima Unit 4 — WSJ: Global concern over removal process (VIDEO) November 18, 2013
  4. Top Nuclear Official: “Very large risk potential” when attempting fuel removal at Fukushima Unit 4 pool — CNN: Debris in rods may damage Tepco’s efforts (VIDEO) November 7, 2013
  5. “Nothing like this has ever been attempted” — Yale Professor: “All of humanity will be threatened for 1000s of years” if rods in Unit 4 pool touch and have nuclear reaction during removal process — Tepco: “Not clear” if fuel is already damaged October 27, 2013

19 comments to Kyodo: Concern about condition of Fukushima Unit 4 — Fuel rods may get dumped onto ground and burn up in quake — Tepco ‘hastening’ removal

  • Heart of the Rose Heart of the Rose

    More like.. 'hastening' the lies.


    Report comment

  • I do not quite understand what's doing in this 4 reactor. Surely there was apparently a fuel, it is only in the pool, the fastest and safest way would be if the latest fuel from the pool (most in need of cooling) to move back to the reactor, which is much more secure than the building of a swimming pool. He worked to the reactor as a fairly strong pool to keep the most recent fuel …
    Besides, a lot more worried about the 3 block, because it's a miracle to me that in the pool there is still water … gently but quickly as possible you need to disassemble it, because it allows you to protect this very dangerous, which is there.
    I think that a possible earthquake, the threat would be freshest in 3 Building …


    Report comment

  • dosdos dosdos

    As in all the spent fuel pools at Daiichi, there is damage. It's not a matter of simply moving the rods as when the facility was undamaged. The structure was altered, as were the racks in the pool and reactor and the crane for moving them. They are moving them with a construction crane, which is far more susceptible to wind and vibration. The idea is to create a new custom crane built into the not yet existing support structure within the next two years. I am assuming that they are speeding up the plans to build the new crane/support.


    Report comment

    • apostrophes

      One would have thought so, but it seems so far there aren't even foundation works for the "building-over-building-4". They have had plenty of time to start this.

      To have abandoned the idea without telling anyone would fit well with the missing 100ft deep cut-off wall.

      Maybe they really do intend to pull the stuff out with a crane like they did in the recent "demonstration", but I've no idea how they could do that AND keep the hot rods under the required amount of water for rad-protection at the same time.

      It remains a mystery to me.


      Report comment

  • razzz razzz

    I am afraid that the Unit 3 SFP already did what they fear Unir 4 SFP might do. Maybe 3's SFP was on fire and the explosion not only put the fire out but sent fuel assemblies flying. What's worse, nuclear fuel on fire or laying on the ground around the site?

    It wasn't just hydrogen collecting in the buildings before exploding, all the other nuclear poisons were mixing in and sent skyward during the explosions.

    TEPCO was working on the reactor in Unit 4 doing a shroud replacement so the racks to hold any fuel assemblies may not be in place.


    Report comment

    • Sickputer

      razzz sez…"racks might not be in place [in RCV (reactor containment vessel) Unit 3].

      SP: Besides the heat distortion of assemblies from fires and explosions that may make removal virtually impossible there is also a big size mismatch to try and utilize the RCV.

      The RCV can hold about 1/10th (25,000) of the (217,000) total rods in the Unit 4 spent fuel pond.

      7-18-2012 SP post:

      "The fuel rod assemblies (which is what they refer to when they say they are removing two) contain 63 skinny nuclear rods about 12.5 feet in length and packed with bullet-sized nuclear pellets. Tthe assembly has an 8 by 8 hole array and I don't know why one hole is left unfilled (patb ?).

      The 63-rod assemblies are inserted into the much bigger core assembly that holds 400 of these smaller assemblies. That's about 25,000 nuclear rods. Over time the 63-rod assemblies are reshuffled in the core to achieve more efficient fission. In time they lose the desired efficiency and are pulled from the big core assembly and "retired" to the nearby spent fuel pond.

      Because they now have much more radiation leakage they can't be removed from deep water for years.
      They built up until the pond holds the current estimated 3,450 fuel assemblies (217,000 rods). That's just in Unit 4's spent fuel pond."

      http://enenews.com/asahi-most-delicate-work-since-311-tepco-removing-2-fuel-rods-to-confirm-whether-they-are-damaged-new-photos/comment-page-1


      Report comment

  • Jebus

    I think possibly there is the off chance that maybe reactor #3 itself could have been damaged a slight bit…
    Maybe even a little radiation got out too!

    http://www.youtube.com/watch?v=9k3Ofs6R9cg


    Report comment

  • razzz razzz

    All (3) reactors that exploded were damaged and venting themselves through any weak points i.e. cracked piped, cracked vessels and most assuredly through blown gaskets at the reactor vessels lids and the containment vessels lids. Like teapots.

    SFPs boiling off would just add to the pressure build up and fallout release.


    Report comment

  • AGreenRoad AGreenRoad

    Nuclear Power; EXPENSIVE, Dirty, Dangerous And Toxic; via A Green Road
    http://agreenroad.blogspot.com/2012/10/nuclear-power-expensive-dirty-dangerous.html

    Super Solar Storm To Hit Earth In 2013 'Carrington Effect'; 400 Nuke Plants Will Melt Down/Explode; via A Green Road http://agreenroad.blogspot.com/2012/03/super-solar-storm-predicted-to-hit-2013.html


    Report comment

  • Flapdoodle Flapdoodle

    Going on three years now. Guess don't know what "hastening" means. Is it something like starting?


    Report comment

  • CodeShutdown CodeShutdown

    Mans mind is such that the ocean is an infinite toilet; out of sight out of mind.

    Is there any doubt these low minded psychopaths would dump their poison (nuclear waste) in the sea, if they could get away with it? Having dumped now a great deal, it must be euphorically obvious that they can get away with it. The more thoughtful of them will be eying the subduction zones.

    between 1946 and 1982, 63 PBq of radioactive waste has been disposed of at sea. (not counting that not counted)

    the London Convention places prohibitions on disposing of radioactive materials at sea. It remains in force until 2018, after which the sub-seabed disposal option can be revisited at 25-year intervals.

    A little ironic that mother nature produced an ape so horrific it proved her own undoing. Reminds me a little of the Lord of the Rings where mentally retarded Orcs came from the middle earth; the uranium from underground will produce deformed and retarded future generations. Popular names will be Gorbag, Lug and Orcobal


    Report comment

You must be logged in to post a comment.