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FUKUSHIMA: Kyoto University Prof: Reactor 1 May Be Undergoing "Recriticality"

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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 06:50 PM
Original message
FUKUSHIMA: Kyoto University Prof: Reactor 1 May Be Undergoing "Recriticality"
Edited on Wed Apr-06-11 07:03 PM by flamingdem
http://www.asyura2.com/11/genpatu8/msg/632.html
http://twitter.com/#!/EXSKF
===

This is the image used with the Japanese transcript! What the...


A nuclear researcher at Kyoto University (which is considered one of the two most prestigious national universities, the other one being Tokyo University) has reversed his opinion and now says the Reactor 1 may be experiencing the "recriticality".

His name is Hiroaki Koide, assistant professor at Kyoto University's Research Reactor Institute who belongs to the Nuclear Safety Research Group at the Research Reactor Institute. He has given interviews on TV and radio, mostly in Kansai stations and not aired in Kanto (where Tokyo is), and would be considered one of the "sceptics" of the official story about Fukushima I Nuke Plant that everything is safe, getting under control.

There ARE researchers in Japan who go against the mainstream government scholars. Koide is one of them (and far from being the most critical), and there are others from universities other than the top few schools (and therefore they don't get hardly any airtime on the Japanese MSM). But thanks to talk radio shows and the Internet (hey it's the same as in the US), at least a small portion of the Japanese people are getting the "alternative" reality other than what's given by the government and the MSM.


This is from the transcript of the interview (in Japanese, NOT the literal translation) Koide gave on April 5, 2011 on Osaka's MBS Mainichi Broadcasting Radio:

"The Fukushima I Nuke Plant accident is not winding down at all. I think I have to revise my opinion which was too optimistic."

- What was too optimistic?

"We thought the reactors "cold stopped", which means the uranium fission stopped. But now I've started to think the fission has started again. In other words, the reactor has become "critical" again - which we call "recriticality"."

- Professor Koide, you were of the opinion that the recriticality was not happening.

"Yes, and I've changed my mind. It may be happening."

- On what evidence?

"First, the level of iodine<-131> is not decreasing; it is increasing. Iodine<-131>'s half life is 8 days. It has been more than 3 weeks since the accident, so the level of iodine<-131> should be about 1/10 of the initial level measured. Second, the presence of chlorine-38 was detected from the contaminated water in the turbine building ."

- What about chlorine-38?

"Well, if chlorine-38 was detected , and that can only mean "recriticality".

Chlorine-37 is a stable isotope, and it exists in salt in the sea water. TEPCO had poured literally tons and tons of sea water into the Reactor Pressure Vessels at Fukushima. The way the stable chlorine-37 becomes highly unstable chlorine-38 (half-life 37 minutes) is for chlorine-37 to acquire neutron.

The only way for neutron to be present near chlorine-37 is for uranium to go critical and emit neutron.

That's what Fairewinds Associates' Arnie Gunderson said in his April 3 video, and that's probably why IAEA mentioned the possibility of "recriticality" on March 30.

Koide thinks the recriticality may be happening in the Reactor 1 where the fuel rods may have been melted down most (Koide thinks there is no cladding left, and the tiny uranium pellets are forming a heap at the bottom of the RPV), but says the other two reactors (2 and 3) are also vulnerable if TEPCO cannot cool them sufficiently and the core melt continues.

He also suspects TEPCO is not pouring enough boron to prevent fission.

Maybe that's another item at Fukushima I that's missing: boron.

It took almost 3 weeks for TEPCO to admit they didn't have enough dosimeters for the workers.

Don't hold your breath for a TEPCO's announcement that they are out of boron. Maybe they can dump bath salt in the pressure vessels and that may stop the fission.

And remember, repeat the mantra of the Japanese government: it is safe.
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snagglepuss Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 06:54 PM
Response to Original message
1. Why wouldn't other countries especially nieghboring ones offer boron
and insist Japan use it.
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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 06:56 PM
Response to Reply #1
2. Something tells me that communicating with Tepco is next to impossible nt
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snagglepuss Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:09 PM
Response to Reply #2
14. I thought Japan's PM said over a wk ago that he would be in charge.
If TEPCO isn't being forthcoming than the govt should completely take over operations with a panel of international experts. Why is TEPCO calling the shots? Why does the intntl community not insist that it play a role?
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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:20 PM
Response to Reply #14
16. BP redux, they know the plant and thus retain control
Plus whatever financial loss they can hoist on the public, maybe better to stay private for that
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aquart Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 06:57 PM
Response to Reply #1
4. Where does it come from? What do you have to do to get it?
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lob1 Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:08 PM
Response to Reply #4
13. It comes from Borax, which is found in (among other
places) Death Valley Calif. Remember Ronnie Regan's 20 mule team borax?
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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:19 PM
Response to Reply #13
15. Added plus, it makes your clothes whiter than white! nt
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aquart Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 08:29 PM
Response to Reply #13
21. I bought a box today to clear my shower drain.
But I'd be happy to donate it.
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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 06:58 PM
Response to Reply #1
5. -- and it gives an idea of the gist of the "leaked" NRC concerns in the New York Times piece nt
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Wilms Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:02 PM
Response to Reply #5
10. Not leaked. SQUEEZED>

A FOIA request produced those documents.

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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:05 PM
Response to Reply #10
12. Aha! Different story indeed, thanks for that nt
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Wilms Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:01 PM
Response to Reply #1
9. Here's a report that Japan asked South Korea for it.
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jannyk Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:02 PM
Response to Reply #1
11. Korea sent them tons of the stuff very early on. nt
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girl gone mad Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:45 PM
Response to Reply #1
19. It's possible..
Edited on Wed Apr-06-11 07:50 PM by girl gone mad
that the salt from the seawater has created clogs which may be preventing the boron from being pumped into the regions where chain reactions could be occurring. The boron can only absorb neutrons after they've been emitted so if it can't be placed within the neutron flux, it won't stop the fission.
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abqmufc Donating Member (590 posts) Send PM | Profile | Ignore Wed Apr-06-11 08:44 PM
Response to Reply #19
24. Correct, seen reports that say salt layers could be too thick on rods for anything to work (n/t)
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aquart Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 06:56 PM
Response to Original message
3. Can some one tell me about boron? Why is it needed here?
What does it do?
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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:00 PM
Response to Reply #3
7. boron absorbs neutrons and interrupts nuclear chain reactions
I wonder if it's hard to get massive quantities

South Korea gave them a pile in the beginning
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wtbymark Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:01 PM
Response to Reply #3
8. Boron will stop the criticality (chain reaction from occuring)
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Tesha Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:27 PM
Response to Reply #3
17. It absorbs neutrons, preventing a fission chain reaction from occurring. (NT)
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wtbymark Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 06:59 PM
Response to Original message
6. yea, Arnie said this last friday when he was refering to the Neutron
Beams observed 2 weeks ago. He was refering to unit 1, and also said that unit 2's discharge water had to be comming from the pressure vessel itself indicating a breech. (IMO- I think unit 2's core is completely emptied into the core catcher (dry well)
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femrap Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:41 PM
Response to Original message
18. This is very alarming....
and the MSM says NOTHING. So I know it's bad.
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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 07:50 PM
Response to Reply #18
20. Story of the decade and yet Charlie S. gets more airtime nt
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aquart Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 08:31 PM
Response to Reply #20
22. Nobody cares about Charlie this week.
Stay current.
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flamingdem Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 08:33 PM
Response to Reply #22
23. You mean on Wednesday, on Monday they were reviewing his theatrical debut
yes he was zilch after that, poor entertainment value.
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femrap Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Apr-06-11 11:14 PM
Response to Reply #20
25. The gov't is probably
paying him to be a Circus.
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