Japan Earthquake: nuclear plants

TCups

IMO, the original 3-boom audio is authentic, based on the analysis of the sound track and video. I can't imagine why anyone wanting to add ear-candy would choose a 3-boom audio with a lot of additional transient mechanical noises rather than a simple "boom". On occasion, it appears that the live video cam that likely recorded the event also records live bird songs. But das mach nichts, IMO. Not worth re-opening debate. Neither an authentic nor unauthentic sound track alters the principal theory of the explosion at Unit 3.

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artax

There's some more image analysis here,... from a while back but might be interesting to compare their evaluation of the data.

http://www.poudreinternetservice.com/photographs.html

Rive

Thanks, but I'm a bit ahead - I've found an astronomic one: RegiStax

With some limitations it works fine.

Ps.: yeah, I'm still just practising...

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zapperzero

And now for something completely different: it is AREVA that supplied the MOX. I have not seen this stated here before.

http://dcbureau.org/201103151304/Nat...ber-three.html

Explains the deep involvement of the French gov't, regulators and AREVA itself in the matter at hand.

etudiant

Speaking of Areva, are they not due to have a 1200 ton/day water decontamination plant eunning on site by the end of May?
Has there been any evidence that work on this facility is even begun?

It is very frustrating to see a multi front problem attacked so very serially. It suggests that the strategy is to wait for natural decay to ease the problem.
However, the radioactivity measured at the various inland sewage treatment plants suggests the site is gradually worsening the local contamination.
So there is a tradeoff, delay means more lost land.

Jorge Stolfi

In case you are still interested, the C programs I used (pnmprojmap, pnmfftfilter, pnmxarith) are in
http://www.ic.unicamp.br/~stolfi/tem...2011-05-09.tgz
They are unix-based (gcc). You may need to hack the Makefiles to get them to compile in your system. The pnmfftfilter prog requires the FFTW library package (libfftw3.a, fftw3.h). The "-info' option of each program prints its manpage.

v13

Hello,

I'm not sure what you're trying to do but you may be looking for hugin. It creates panorama images in the way you described it and can use multiple images to create an HDR version. I've created a number of panorama images but I did not have much success in HDR mostly because I'm not very familiar with that. It also does lens correction and can use different projections.

|Fred

about http://dcbureau.org/201103151304/Nat...ber-three.html

It has, and as it was to some extend irrelevant, there was not much discussion about it.
If I may, What part of the article make you qualify it as explanation of "the deep involvement of the French gov't, regulators and AREVA itself "
The article is no so much about AREVA involvement, and strictly speaking and GE is more involved..

The article is about Robert Alvarez saying MOX does not work , because its hot
"One reason proponents of MOX reactor fuel support its use is because, once the fuel is burned in a reactor, it is so hot that terrorists would not be able to steal a fuel assembly"

and

Because terrorist may use it "Reprocessing was abandoned by the United States in the 1970s because of the dangers of weapons proliferation."

No to mention it's a French thing ...

Point is this is not so much of about physics but much more about political and divergent economical interest.. And it has always been.. Here is a partially declassified (old) CIA intelligence report on French MOX http://cryptome.org/0003/cia-fr-pu.zip

zapperzero

So. I have been unattentive again. Sorry, real life keeps throwing me curveballs these days and my attention span isn't what it used to be.

I do not believe it irrelevant, even from a technical point of view. Tests of AREVA MOX fuel elements have ended badly in other places. There may be a common factor that makes them unreliable, such as, oh, say, French quality control (if you've ever owned a Renault you know of which I speak).

The article does not mention the involvement, but it has been visible and high-profile from day one almost.

Sarkozy was there specifically to talk about nukes, the French whatsitsname agency was first to break ranks and say that yep, Fukushima is a big problem indeed, Areva offered help early on and was accepted instantly (only the US achieved similar performance). I had been wondering why the interest - seems they're playing for the home audience as well, trying to look all grown up and responsible and efficient (la Hague has been a smoldering scandal in France since before it was put in operation).

BlueCactus

New pics of Fukushima NPP are released anounymously.
here, we can see it in slideshow.

http://seiga.nicovideo.jp/watch/sg21679

zapperzero

Better-quality videos of the ventilation op and the sfp. Same content, so ignore if you're not into image processing.

http://martynwilliams.posterous.com/...4-latest-video

ascot317

Erm, you still seem to believe that it must be a production just because one video has helicopter noise and the other hasn't. Like I said, the explosion sound doesn't have to come from the supplier of the video. That does not mean it's not authentic. A different unit/person could have had an audio recorder running at that time, just no camera, or had the camera aimed at something else.
News channels usually pay for video and don't care much for the audio (when's the last time you had nobody talking on a news channel). So faking sound to make more money is rather unlikely.

|Fred

Could you please upload them elsewhere, in order to share them with non Japanese readers
that's about 80 pictures it seems

mrcurious

A question for the brilliant people on this thread regarding the explosion in #3.

Assuming the top of the reactor building had filled with hydrogen and that the water in SFP had dropped considerably exposing and partially melting a portion of the fuel rods, would the force of the explosion down the SPF onto the top of the water act as if it was hitting concrete thereby pushing the force of the explosion back up taking the exposed fuel rods and assemblies with it?

|Fred

This seems to me unlikely, then again I'm not one of the brightest of the crowd

~kujala~

Could it be ... that the sudden spike of temperature on April 8th is somehow related to the nitrogen operation?

http://www.nisa.meti.go.jp/english/f...110504-1-2.pdf

Also by some strange coincidence this nitrogen operation might have messed with CAMS drywell?

pdObq

I was not able to copy and past the Japanese sensor labels into Google Translate (pdf document does not allow copying [sure, there might be tricks..]), but awesomely enough Google Translate eats the whole pdf file and spits out translations for all sensor labels.
Wow, I am amazed... (even if the images are lost and the format gets screwed up)

http://translate.google.com/translat...s%2FilskVG.pdf

The N4B sensor translates as "Water nozzle N4B (end)". But still what does N4B stand for? Just some label on some schematic that we don't have? There is also some N4C on page two of the document. (Btw, those documents are awesome! Thanks AntonL!).