Japan Earthquake

Japan Earthquake | Page 2307

@dean If you catch this, do you have a link for the Kashiwazaki document? It mentions the fire dept piping I saw damaged at Fuku.

@artnuke I don't think I have seen that book yet.
by lillymunster 9/5/2011 3:02:44 PM

Someone sent me this this morning, have not had time to read through the whole thing yet. www.tec-sim.de Paper on #4 spent fuel explosions.
by lillymunster 9/5/2011 3:07:12 PM

Be back in a bit.
by lillymunster 9/5/2011 3:07:30 PM

@lillymunster , a KiKK study ought to be conducted in the US. Though probably fewer people live around npps here, the greater number of npps should compensate for this difference, and similar sample sizes could be reached.
by Peter Melzer 9/5/2011 3:45:28 PM

i have read in an additional comment, that, though the radiation released by a runnung plant is not significant, it is significant for the time when fuel is exchanged.
by Edano 9/5/2011 4:44:10 PM

In my opinion the NCI study on changes in county-wide cancer-related mortality before and after the opening of nuclear facilities tested the advances in cancer therapy. The DOE plants listed in the study were opened as early as 1943. Chemotherapy did not exist at the time and only gained traction in the 1970s. A county-by-county comparison is geographically too rough-shod to uncover the differences as the German KiKK study demonstrates.
by Peter Melzer 9/5/2011 4:48:49 PM

hello everyone. Question? On the video cam are those spots or dots the nuclides? www.youtube.com
by Cryptococcus 9/5/2011 5:17:43 PM

Hachiro hopes to resume halted reactors soon if local gov'ts approve

TOKYO, Sept. 6, Kyodo

Japan's new industry minister Yoshio Hachiro said Monday he aims to resume operation of idled nuclear reactors in Japan ''as soon as possible'' once local governments approve their resumption.

Hachiro suggested in a group interview with media organizations that the resumption of reactors idled for regular checks could take place before the detailed cause of the nuclear crisis at the Fukushima Daiichi power plant becomes clear, saying it is ''impossible'' to investigate the cause within a few months.

''If people in the local areas (hosting nuclear power plants) approve, I hope (the resumption) will take place as soon as possible, although I cannot foresee whether it will be before the end of this year,'' Hachiro said.
english.kyodonews.jp
by Edano 9/5/2011 5:24:12 PM

@Cryptococcus Not likely, the camera is way too far away. However, on the Tepco camera there are sometimes defects (white spots) which look alot like the example shown in this video experiment. www.youtube.com
by M.I.A. 9/5/2011 5:24:30 PM

@MIA thank you
by Cryptococcus 9/5/2011 5:24:54 PM

@All Does anyone know what the temp. of the unit 1 suppression chamber/torus was on March 12? That seems to me the key question to answr in re: explosion/meltdown theories. Iirc, tepco admitted one of the units in Daini s/c topped 100C in that time frame, but I can't find unit 1 temp for Daiichi.
by M.I.A. 9/5/2011 5:27:39 PM

@M.I.A. i haven't seen any temperature readings before march 19.
by Edano 9/5/2011 5:36:59 PM

@Edano TY and darn! All bets are off if the temp was above 100C in the s/c...
by M.I.A. 9/5/2011 5:38:17 PM

www.tepco.co.jp
by Edano 9/5/2011 5:38:37 PM

@M.I.A. the first reading of S/C is on 4/2 16:30 : 56.7° for A and 57.5° for B
by Edano 9/5/2011 5:42:51 PM

damn, something went wrong with the colors of my temp 1 graph....
by Edano 9/5/2011 5:45:52 PM

@Edano And by then the s/c was not a significant player for cooling. Probably getting little to no blowdown by then.
by M.I.A. 9/5/2011 5:46:10 PM

in #2 there were high temps in S/C A : 4/2 98.9°
by Edano 9/5/2011 5:50:10 PM

in #3 not : 3/27 16:00 59.1°
by Edano 9/5/2011 5:51:49 PM

it's a good question: why was water boiling in suppression pool #2, but not in the others ?
by Edano 9/5/2011 5:53:25 PM

#2 is (visibly) more intact than the other two, and may have still-functioning systems, OR the corium stayed in #2 torus and is heating it up?
by M.I.A. 9/5/2011 5:56:14 PM

@M.I.A. i don't think it is possible that corium finds a way into the torus. it will always flow straight down, it is veeeeery heavy.
by Edano 9/5/2011 6:06:30 PM

@Edano @Edano @Edano Ah, true...And I should clarify my understanding is, the s/c is boiling is not normal. It indicates uncompressible steam and nobel gasses, and possible steam stratification or water hammer thru the blowdown tubes. In which case it's pretty useless as a cool-down mechanism. If the pressure vessel is still basically intact, it could still be blowing down uncompressibles. that uneven load or water hammer seems to me to be the most likely way that #2 torus got a hole. like an over-inflated tire blowing a hole in a weak spot. but I'm a simpleton, so what do I know? :)
by M.I.A. 9/5/2011 6:13:44 PM

www.houseoffoust.com

@M.I.A. in the plot we can definitely see a pressure above design right before the explosion. the drywell is designed for 0.5 MPa, and the pressure rose to nearly 1 MPa. i totally agree that this was (one of) the reasons for the drywell breach.
by Edano via Houseoffoust 9/5/2011 6:19:34 PM

@Edano Duh, #2 lost pressure completely and very soon. So, the question remains tantalizing- what caused the temp in the s/c to be so high on April 2 ?!
by M.I.A. edited by Edano 9/5/2011 6:23:03 PM

yes, it is strange. boiling water although there is no pressure anymore.
by Edano 9/5/2011 6:27:28 PM

Current Status Of The Nuclear Power Plants In Japan
by Reeba 9/5/2011 6:27:35 PM

www.jaif.or.jp
by Reeba 9/5/2011 6:27:39 PM

MIA, do you have a link for the TEPCO statement that Daini units had 100c in their supression chambers? They are all ABWR units and supposedly have an improved suppression chamber system. IT could be significant if it shows some sort of out of range behavior on their scram incidents. BTW, did Daini lose offsite power? I can't remember
by lillymunster 9/5/2011 6:39:10 PM

@lillymunster yes it lost offsite power. similar to daiichi 5&6.
by Edano 9/5/2011 6:44:07 PM

Generators kicked in at Daini. Wondering why their suppression chambers boiled during shutdown.
by lillymunster 9/5/2011 6:47:31 PM

does this help March 13th unit 1
- At 5:22am, the temperature of the suppression chamber exceeded 100
degrees. As the reactor pressure suppression function was lost, at 5:22am,
it was determined that a specific incident stipulated in article 15,
clause 1 has occurred.
- We decided to prepare implementing measures to reduce the pressure of the
reactor containment vessel (partial discharge of air containing
radioactive materials) in order to fully secure safety. This preparation
work started at around 9:43am and finished at 6:00pm.
- Restoration work in reactor cooling function is in progress to achieve
reactor cold shutdown. www.tepco.co.jp
UNIT 2 At 5:32am, the temperature of the suppression chamber exceeded 100
degrees. As the reactor pressure suppression function was lost, at 5:32am,
it was determined that a specific incident stipulated in article 15,
clause 1 has occurred.
- We decided to prepare implementing measures to reduce the pressure of the
reactor containment vessel (partial discharge of air containing
radioactive materials) in order to fully secure safety. This preparation
work started at around 10:33am and finished at 10:58pm.
- Restoration work in reactor cooling function is in progress to achieve
reactor cold shutdown.
by elainekirk 9/5/2011 7:45:30 PM

@lillymunster Sorry-was away. Link : www.tepco.co.jp
by M.I.A. 9/5/2011 7:46:25 PM

I don't remember this: A seriously injured worker who had been trapped in the crane operating
console of the exhaust stack was transported to the ground at 5:13pm and
confirmed dead at 5:17pm. We sincerely pray for the repose of his soul.
by lillymunster 9/5/2011 8:10:18 PM

@lillymunster where is that lilly
by elainekirk 9/5/2011 8:11:11 PM

@elainekirk Very end of the Mar 12 TEPCO document, I think the one you posted
by lillymunster 9/5/2011 8:11:42 PM

@lillymunster eek I was just looking for suppression chamber so only searched that word didn't look further!!. What info are you looking for on the sup chambers then I can refine my search
by elainekirk 9/5/2011 8:21:10 PM

@lillymunster I don't think I ever read that one either. Just slipped quietly in at the end of a document hoping no one notices?
by RadioGuy 9/5/2011 8:23:06 PM

@RadioGuy It was put out on the 12th. We were all probably over at Reuters live blog trying to understand what was happening.
by lillymunster 9/5/2011 8:29:19 PM

Electrified bacterial filaments zap uranium: Mechanism by which microbes scrub radioactive contamination revealed. Hair-like filaments called pili enable some bacteria to remove uranium from contaminated groundwater. The discovery, published today in Proceedings of the National Academy of Sciences1, could aid in the development of radioactivity clean-up technologies. www.nature.com
by Cryptococcus 9/5/2011 8:36:04 PM

there is a nisa meti timeline up to the 14th march detailing all the reports under articles eg ・ TEPCO reported to NISA in accordance with Article 10 of the Act on
Special Measures Concerning Nuclear Emergency Preparedness
regarding Fukushima Dai-ni, Units 1. (18:08 March 11) docs.google.com
by elainekirk 9/5/2011 8:39:52 PM

Link to an updated (sep. 1) report/timeline from the World Nuclear Association which is very comprehensive (no sure accuracy, of course): www.world-nuclear.org

by M.I.A. 9/5/2011 8:43:00 PM

@Cryptococcus that's interesting
by elainekirk 9/5/2011 8:45:04 PM

@elaine Yes, this has been know for awhile. Bacterial nanowires (also known as microbial nanowires) are electrically conductive appendages produced by a number of bacteria most notably from (but not exclusive to) the Geobacter and Shewanella genera. I'm happy to see another paper on it. yippee en.wikipedia.org
by Cryptococcus 9/5/2011 8:59:04 PM