Japan Earthquake

Japan Earthquake | Page 2599

Hi bo. Welcome back. I hope you enjoyed time with your family!
by Mid Valley 11/3/2011 3:17:57 AM

Hi MV thanks. I did have a great time. Now at a conference in Cleveland before heading home.
by bo 11/3/2011 3:18:31 AM

National Police Agency of Japan Nov. 2, 2011: Damage Situation and Police Countermeasures associated with 2011Tohoku district - off the Pacific Ocean Earthquake (direct link to pdf ) Number of Individuals killed:15,829 Missing: 3,679 Injured: 5,943 www.npa.go.jp
by Mid Valley 11/3/2011 4:15:39 AM

Japan Revives a Sea Barrier That Failed to Hold www.nytimes.com
by Mid Valley 11/3/2011 4:54:30 AM

www.jma.go.jp first heavy quake seismic 4 but not fuku
by Edano via Jma.go.jp 11/3/2011 11:00:46 AM

Thursday November 3 2011, 10:34:30 UTC 19 minutes ago Near S. Coast Of Honshu, Japan 5.2 77.0 CSEM-EMSC Feed
Thursday November 3 2011, 10:34:29 UTC 19 minutes ago near the south coast of Honshu, Japan 5.1 70.4 USGS Feed
by Edano 11/3/2011 11:01:03 AM

19:41 JST 03 Nov 2011 19:34 JST 03 Nov 2011 Ibaraki-ken Nambu M4.9 seismic 4
19:38 JST 03 Nov 2011 19:34 JST 03 Nov 2011 Ibaraki-ken Nambu M4.9seismic 4
by Edano 11/3/2011 11:01:47 AM

that was ibaraki, nothing dangerous for the plants.
by Edano 11/3/2011 11:05:38 AM

it is as welll it is Japan where the nuke plants are not affected by quakes it would have been even better in france because they don't have quakes even when they have quakes
by elainekirk 11/3/2011 11:10:48 AM

@Edano @Edano the boards were closed when I woke up and there were no posts in mod so yours must be floating around cyberspace
by elainekirk 11/3/2011 11:12:11 AM

@elainekirk good that you can see me. i wasn't sure if i show.
by Edano 11/3/2011 11:12:31 AM

france has no quakes and no radiation never. by definition.
by Edano 11/3/2011 11:15:24 AM

TEPCO retracts criticality call

The operator of the Fukushima nuclear power plant has retracted an earlier assessment that a continuous nuclear reaction, or a criticality, could have taken place in the damaged Number 2 reactor.

The Tokyo Electric Power Company, or TEPCO, said on Thursday that the small amount of xenon-135 it detected in gas taken from the reactor's containment vessel was the result of the spontaneous nuclear fission of radioactive curium-242 and -244. The two substances are contained in nuclear fuel.

The amount of xenon-135 detected almost matched the amount that would have been produced if the radioactive curium in the fuel had undergone spontaneous fission.

TEPCO says a criticality event would have resulted in higher levels of xenon concentration.

Spontaneous fission refers to the nuclear fission of radioactive materials other than uranium, and it does not lead to criticality. Such fission is said to occur constantly.

The earlier detection of small amounts of Xenon-135 had suggested the possibility of a criticality occurrence in the melted fuel in the damaged reactor.

TEPCO sys it will send the assessment to the Nuclear and Industrial Safety Agency for reevaluation.

Thursday, November 03, 2011 15:20 +0900 (JST)
www3.nhk.or.jp
by Edano 11/3/2011 11:19:19 AM

Xenon at Fukushima not result of 'critical' nuclear reactions: TEPCO

TOKYO, Nov. 3, Kyodo

Tokyo Electric Power Co. said Thursday the detection of radioactive xenon at its stricken Fukushima Daiichi power plant, indicating recent nuclear fission, was not the result of a sustained nuclear chain reaction known as a criticality, as feared, but a case of ''spontaneous'' fission.

''It is not leading to instability of the reactor or a rise of the radiation level outside,'' the utility known as TEPCO said, adding that it does not expect the incident to impact its goal of attaining a stable condition of the plant's troubled reactors called cold shutdown.

The plant operator said it has judged that spontaneous fission, which it says occurs at a constant rate, has generated xenon-133 and xenon-135 at its crisis-hit No. 2 reactor, as a criticality would have resulted in the recording of concentration levels 10,000 times higher. english.kyodonews.jp
by Edano 11/3/2011 11:23:05 AM

criticality is criticality, except for tepco. they keep on redefining words.
by Edano 11/3/2011 11:24:36 AM

Imperial family celebrates growth of Prince Hisahito :)

TOKYO, Nov. 3, Kyodo english.kyodonews.jp
by Edano 11/3/2011 11:29:00 AM

@Edano I nearly choked when I read the tepco statement
by elainekirk 11/3/2011 11:35:25 AM

@elainekirk somehow tipical, though they still surprise us.
by Edano 11/3/2011 11:37:12 AM

@elainekirk something is happening in greece ...
by Edano 11/3/2011 11:46:00 AM

@Edano Criticality and spontaneous nuclear fission are not the same thing. A criticality (or in this case re-criticality) would have, indeed, highly increased radioactivity levels in the surroundings of reactor #2, whereas spontaneous nuclear fission will continue to occur until cold shutdown is reached gradually decreasing radiation levels, has has been the case so far. Tepco's press released has been, once again, misunderstood, probably due to the already common loss in translation.
by Pedro Jesus 11/3/2011 11:46:05 AM

@Pedro Jesus i see no reason for announcing a simple nuclear fission event in an extraordinary press conference.
by Edano 11/3/2011 11:49:28 AM

@lillymunster a curium atom has fissioned yesterday !
by Edano 11/3/2011 11:54:27 AM

Reading that. I noticed temps at 2 started to go back down slightly last night. So do we think they are correct?
by lillymunster 11/3/2011 11:56:37 AM

ABC news just used a very zoomed in shot of a bonfire in Oakland with narration making it look like they started building fires in Oakland. I wish we had the ability to pull broadcast licenses over this kind of thing. Sorry - ot - had to vent. :-(
by lillymunster 11/3/2011 11:58:17 AM

@lillymunster There is little reason to suspect otherwise. Fission will continue in all four reactors until they reach cold shutdown. Even after cold shutdown some minor spontaneous fission will still occur. As long as there are some heavy radioactive isotopes present some, even if very little, fission will occur. That's why these materials remain radioactive for so long. Lighter isotopes do not undergo spontaneous fission, though.
by Pedro Jesus 11/3/2011 12:01:49 PM

i think tepco is just making educated guesses. how they now decided that curium is the cause, is simply ununderstandable. it could be any other element.
by Edano 11/3/2011 12:04:35 PM