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Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)

 
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07/30/2012 01:23 AM
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Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
This week, Dr. Caldicott has a new conversation with nuclear engineer Arnold Gundersen about the ongoing nuclear disaster at the Fukushima plant and its effects on Japan and the rest of the world. [...]

At ~15:00 in

Arnold Gundersen, Nuclear Engineer: All the reactors have plutonium in them… Uranium-238 becomes plutonium-239 when it absorbs a neutron… There was close to a ton of plutonium in each of the reactors… scattered throughout the fuel… A ton of plutonium in each reactor… You and I know how dangerous plutonium can be… makes the cleanup that much more difficult.


[link to www.youtube.com]

[link to enenews.com]
Anonymous Coward (OP)
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07/30/2012 02:33 AM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
Among the topics discussed are the little understood dangers of internal exposure to radiation. Read Dr. Caldicott’s 2011 article How nuclear apologists mislead the world over radiationin which she discusses internal emitters.

[link to ifyoulovethisplanet.org]

2) Nuclear industry proponents often assert that low doses of radiation (eg below 100mSV) produce no ill effects and are therefore safe. But , as the US National Academy of Sciences BEIR VII report has concluded, no dose of radiation is safe, however small, including background radiation; exposure is cumulative and adds to an individual’s risk of developing cancer.

[link to www.helencaldicott.com]
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07/30/2012 02:48 AM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
The Fukushima Nuclear Accident Independent Investigation Commission Report

[link to fairewinds.org]
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07/30/2012 10:29 AM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
At ~12:00 in

Arnold Gundersen, Nuclear Engineer: At Reactor 2… the conclusion is that fine pieces of nuclear fuel have escaped the containment and are lying as a powder on the bottom of the torus room.
At ~14:00 in

Gundersen: The particles escaped the torus… that’s what’s fascinating… these are outside containment… it’s quite clear that the junction between the torus and the dry part of the containment failed.

At ~13:15 in

Arnold Gundersen, Nuclear Engineer: So I think they get to the point where they throw some concrete down on the top of it and come back in 300 years… This is not something I can figure out how one would clean up… 300, 400, 500 years.
ehecatl

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07/30/2012 10:52 AM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
At ~12:00 in

Arnold Gundersen, Nuclear Engineer: At Reactor 2… the conclusion is that fine pieces of nuclear fuel have escaped the containment and are lying as a powder on the bottom of the torus room.
At ~14:00 in

Gundersen: The particles escaped the torus… that’s what’s fascinating… these are outside containment… it’s quite clear that the junction between the torus and the dry part of the containment failed.

At ~13:15 in

Arnold Gundersen, Nuclear Engineer: So I think they get to the point where they throw some concrete down on the top of it and come back in 300 years… This is not something I can figure out how one would clean up… 300, 400, 500 years.
 Quoting: Anonymous Coward 20898205


hum...


Someone finally getting around to mentioning the bottom line about all of this. (and I question if this process could have started sooner)

He is speaking of reactor 2 but I think that pretty much the same action is needed at most of the rest of the facility and the region... no?

Last Edited by ehecatl on 07/30/2012 10:53 AM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)

Follow-up to: Tepco releases labeled image indicating location of No. 3 Spent Fuel Pool (PHOTO) which noted “what appears to be a whitish haze” in the location above the spent fuel pool.

According to Fairewinds nuclear expert Arnie Gundersen:

Yes, the white haze is water evaporating off the SFP. There is a 1/3 core off load of hot nuclear fuel in the U3 SFP, so there is a lot of decay heat. That’s why U3 is almost as dangerous as U4.

Thread: Gundersen: White haze in new photo of Unit 3 is coming from spent fuel pool — Almost as dangerous as Unit 4 (PHOTOS)
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
Chris Martenson: Right and so you mentioned Unit 4 then, also being at risk for this. I thought that unit four, the core was out and that they have some water back in the pool. What is the concern with unit four at this point?

Arnie Gundersen: You are absolutely right and there is no reactor running there. Everything has been taken out and it was put in the spent fuel pool. But that means there is no containment either, so the entire spent fuel pool is visible literally. When they have those helicopter fly-overs, you can look down into this blown out shell of a building and see the fuel in the spent fuel pool. It's still relatively hot, because it only shut down in November. So there is still a lot of decay hear in that pool. Brookhaven National Labs did a study in 1997 and it said that if a fuel pool went dry and caught on fire, it could cause a hundred and eighty-seven thousand fatalities. So it's a big concern and probably the biggest concern. I now the Chairman of the NRC said that the reason he told Americans to get out from fifty miles out was that he was afraid that Unit 4 would catch fire, that exposed fuel pool would volatilize plutonium, uranium, cesium, and strontium. And if the Brookhaven Study is to be believed could kill more than a hundred thousand people, as a result.

Chris Martenson: So talk about — realistically – I mean this is going to be months, years, whatever, it’s going to take a long time. What do they do at this point, are they going to entomb these things, are they required to just keep dumping water on these things until they finally cool down, capturing water all the way through? Or is there some way that they can maybe just throw up their hands and just pour a bunch of concrete on it and call it a day?

Arnie Gundersen: I think eventually they may get to the point of throwing up their hands and pouring the concrete on. They can’t do that yet, because the cores are still too hot. So we are going to see the dance we’re in for another year or so, until the cores cool down. At that point, there’s not anywhere near as much decay heat and you probably could consider filling them with concrete and just letting sit there, like we have it at Chernobyl, as a giant mausoleum. That would work for units 1, 2, and 3. Unit 4 is still a problem, because again all the fuel is at the top and you can’t put the concrete at the top because you will collapse the building and it’s so radioactive, you can’t lift the nuclear fuel out. I used to do this as a living and Unit 4 has me stumped.

[link to www.fairewinds.com]
 Quoting: Anonymous Coward 14263456
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07/30/2012 11:38 AM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
bump
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
At ~18:30 in

Arnold Gundersen, Nuclear Engineer: You’ll see those reactors steaming, still — they’re giving off gas. Unit 1 has a cover on it, so most of the gas is captured — Units 2 and 3 don’t. So whatever steam is coming out of the building is carrying some radiation, no where near what happened in the first weeks, months, etc. — but there is some radiation going out airborne.

The biggest problem is what’s in the water. The buildings continue to leak into the groundwater.
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07/30/2012 02:08 PM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
bump
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07/30/2012 04:34 PM
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
At ~21:00 in

Arnold Gundersen, Nuclear Engineer: I’ve been encouraging people on the West Coast to demand of their state government to take some samples because the US government is not taking samples. And of course what samples are being taken, if it’s below an arbitrary number, the authorities are not announcing what that number is.

I’m sure the authorities have caught fish and they’re contaminated and to avoid a public health scare, or more likely to avoid a business collapse in the fisheries, they’re not telling people what the number is.

Is the radiation high or low? I don’t know, but I’m sure they’re detecting it in fish even on the West Coast of the United States.
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Re: Fukushima: its effects on Japan & the global risks posed by the No. 4 reactor (Gundersen/Caldicott)
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