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Originally posted by Styrge
The mysterious light somebody spotted from TEPCO webcam footage is an awesome find! There is an another mechanism to produce visible light from radiation besides cherenkow radiation. When ions created by a heavy radiation source (all ionizing radiation ionizes the air) meet the electron rich surroundings and neutralize, they give off UV-rays. (about 10 eV in energy) These in turn cause luminescence in nearby atoms and molecules. (By displacin valence electrons witch subsequently drop back to their original orbits, giving of 1-3 eV visible light.) This is how the northern lights work. Red is the wavelenght for oxygen and blue comes from nitrogen - familiar also from electric arcs!
The other mysterious light seen way above the plant could be explained this way also (that the Fox news clip was about).
Originally posted by Regenstorm
reply to post by Tallone
So how did all the freon from the industries in the northern hemisphere get to the upper atmosphere of the southern hemisphere to form the hole in the ozone-layer?
Or is there another cause for that?
I'd always assumed those holes were the result of atmospheric nuclear testing anyway.
Originally posted by JustMike
reply to post by Destinyone
Des, that's a very good and highly informative video and I'd recommend that other members watch it.
Professor Busby says that the explosions at Daiichi were from hydrogen. Now, this is coming from a man who is an expert in the field of things nuclear, but who is also anti-nuclear power stations and made that stance quite clear. I think we can safely accept that he would not be saying they were hydrogen explosions just to back up what TEPCO has said.
So, based on what Prof. Busby has said, we can give the hydrogen explosion perspective a lot more credence. All the same, I think it would be good to get some calulations done to confirm that the energy release in the #3 building's explosion was in line with what would be possible from a hydrogen explosion alone.
Originally posted by TheRedneck
reply to post by zorgon
I just went through it again... the initial flash was at 0:02. At 0:04, 0:06, and 0:08 there were thuds... not explosive booms, but thuds. Three in a row, at roughly 2 second intervals. I believe we were hearing ruptures in the containment, possibly from pressure and overheating.
The actual explosion occurred a little bit after that, a steam explosion as corium hit water. We didn't hear that sound because the video cut off 11 seconds after the initial flash.
So based on that, here's what might have happened. I am giving times, where I can, in seconds after the initial event:
- 0:00 - There is a pressure release in the reactor pressure vessel.
- 0:02 - The new stresses cause a second break in the RPV.
- 0:04 - Another break occurs in the RPV. Corium is now sliding out of its container.
- Corium begins creating a massive amount of steam, which builds pressure inside the building.
- 0:28 - The video begins showing.
- 0:30 - Steam pressure builds up within the building, causing something to ignite, causing the flash. This was probably a small pocket of hydrogen which was mixed with a lot of air. The color indicates that it was in an area which contained other combustible materials (hydrogen flames are almost invisibe). I am assuming at this point that the bulk of the hydrogen was too concentrated to be flammable.
- 0:32 - The flash ruptures the building and starts releasing the steam explosively, along with anything else in its way. The bulk of the hydrogen begins mixing with outside air. We hear the sound of the first RPV breach.
- 0:34 - We hear the sound of the second RPV breach.
- 0:36 - We hear the sound of the third RPV breach.
- The bulk of the now-liberated hydrogen ignites from the initial flash, causing a horizontal wavefront that triggers the earthquake and tsunami sensors.
The above assumes a distance which would create a 30-second delay between light and sound reception. Would someone please let me know if this is about right? I forget the actual distance.
Another little addition to the story:
METI orders nuclear plants to adopt new safety measures
Kaieda said that the ministry had ordered the utilities to adopt the new measures in one month.
The minister said that the measures include requiring utilities to have power cars, which could sustain power supply at nuclear power plants in times of emergency, and securing fire trucks to cool distressed facilities.
Under the new emergency safety measures, METI requested local power utilities to check their equipment and facilities for possible response to tsunami; compile their contingency plans and run training for their emergency response as well as ensuring ways to cool used fuel pools if cooling systems are knocked out, the ministry said in a statement.
METI also requested local power utilities to report their contingency plans and the status of their preparations for their emergency response to Nuclear and Industrial Safety Agency as soon as possible, the ministry said.
NISA then intends to scrutinize the contingency plans by the end of April, METI added.
Kaieda added that power utilities can adopt these measures at operational nuclear plants without suspending operations. He, however, said that he would not allow the restarting of nuclear power plants which are currently undergoing maintenance until the measures have been implemented.edit on 1-4-2011 by curioustype because: Sorry, I pated my comments as well as the Ext text that I wished to quote - corrected, follow the link to my original post if you wish to read my comments there...
Originally posted by brocktoon
reply to post by Regenstorm
You would not expect it to be able to be focused into a big flash like that.
Originally posted by Qumulys
reply to post by LilFox
I know its stupid, I know there's no point in asking, I know I'm most likely bathing in its effects. But can you please tell me your not living in the outer-south-east of Melbourne. I'll feel so much better if your from Werribee... Horrible I know, but I have 2 precious little girls, and I'm frightened, even though I'm told these levels are harmless, doubt creeps in. :-(
edit on 1-4-2011 by Qumulys because: (no reason given)