Japan Earthquake | Page 124
Inject Different dyes to the different coolant systems.by gumba 3/28/2011 1:31:44 AM
@Salu No good reason. we all discussed this several pages back. There are ways to measure it in minutes....by marie rich 3/28/2011 1:32:16 AM- @Salu I was thinking the same. Twice a week sounds strange.by Diane 3/28/2011 1:32:22 AM
- Thank you All. Earlier discussion was noted on how quickly readings could be done with certain instruments. I thought it was odd only 2x's a week ....by Salu 3/28/2011 1:34:31 AM
A very cute animated video about BWR nuclear reactors... until the very end
by openmind 3/28/2011 1:34:35 AM- @Matsuoka I think it's what they're not seeing (sorry, Ralph, I know i'm no expert). If They see strontium90 (unit12&4) or plutonium (unit3), reactor core for sure. The other isotopes can come from spent fuel.by marie rich 3/28/2011 1:35:32 AM
- Just a mental exercise. I hope my formatting comes through. March 18th 8:10 PM West Gate 447.６ μSv/h
March 18th 8:00 PM North of Main Building 3,611.0 μSv/h
8 times more north of main building.
March 26th 3:00 AM West Gate 126.7 μSv/h
so it might be about like this if it were posted.
March 26th 3:00 AM North of Main Building 1013.6 μSv/h
There are many instances where the readings were more then 10 times different.
by Ralph Unger 3/28/2011 1:35:53 AM - *sorry* not #4by marie rich 3/28/2011 1:35:59 AM
@openmind funnyby Jim Carver 3/28/2011 1:36:20 AM- the control rods are said to be melting on about 350 centigrades. maybe they have melted meanwhile and you would be able to find their isotopes in the puddles as well.by Matsuoka 3/28/2011 1:36:47 AM
- i also learned today that they should find Cl38 if there is a fission ...by Matsuoka 3/28/2011 1:38:41 AM
What do you think those variable readings mean, Ralph?by Sky 3/28/2011 1:38:56 AM
@Matsuoka I think about the best they can do with all of the water they're pouring on that place is define radiation proximities.by RadioGuy 3/28/2011 1:39:10 AM- @Matsuoka Actually, I think you're right. I think that's why they're testing for Barium (Ba). I'm guessing it might be part of the zirc.-alloy cladding. People leave clues to what they're doing without realizing others might catch onby marie rich 3/28/2011 1:40:53 AM
@Matsuoka I wondered about the chlorine-38 indicated in this thing...by pj 3/28/2011 1:41:06 AM
Light southerly winds in region, how fortunate there is a high pressure area over Japan - it keep winds light, and tends to keep air from rising www.jma.go.jpby Bobby1 3/28/2011 1:41:09 AM- NHK Live again?by CaraBnr 3/28/2011 1:41:13 AM
- "Japanese Rules for Nuclear Plants Relied on Old Science", www.nytimes.comby Jim Carver 3/28/2011 1:41:22 AM
- oops! Here is the link www.nisa.meti.go.jpby pj 3/28/2011 1:41:26 AM
- by openmind 3/28/2011 1:43:02 AM
- the Cl38 thing is interesting, but didn't they withdraw it ? or was it a different analysis. it's late and i amgetting confused.by Matsuoka 3/28/2011 1:43:19 AM
- @Ralp Unger Last data I saw from the main building of the plant was 1300 micro/Sievert at the 26th. www.nisa.meti.go.jpby Salvador 3/28/2011 1:43:25 AM
- If it is 1 mSv north of the main building, that is where workers not even working might be, then what might it be closer to the buildings? At 1 mSv per hour most workers not even in the plant would be reaching their limit of 250 mSv per year. If they were there 24 hours a day from the beginning of this accident..by Ralph Unger 3/28/2011 1:43:54 AM
- @Salvador atmc.jpby Ralph Unger 3/28/2011 1:45:03 AM
I have found another pdf of soil readings www.mext.go.jpby elainekirk 3/28/2011 1:45:10 AM- Here is what they have in terms of their "reassessed" numbers: Tc-99m
I-131
Cs-134
Cs-136
Cs-137
Ba-140
La-140by Jojo 3/28/2011 1:46:18 AM 
this situation reminds me of the Gulf of Mexico oil spill, when the gov't admitted it didn't have the expertise to deal with it and depended on industry--well japans industry is panicked and TEPCO certainly is overwhelmed. We need a coordinated international response immediately-- airlift those robots sitting in germany and france over--by mainejen 3/28/2011 1:46:27 AM- @you Which I found here: www.tepco.co.jpby Jojo 3/28/2011 1:46:42 AM
- ty for that link Ralpby Salvador 3/28/2011 1:47:32 AM
- @Jojo @Matsuoka I don't know...am hoping someone could provide more info - I just noticed that isotope in the table and wondered about it. It wasn't something I was familiar with. So Jojo, they didn't even have the right isotopes listed in that release?!?by pj 3/28/2011 1:47:38 AM
- the moderator rods in BWR consist of Borcarbid, Hafnium or Cadmium. i think they found cadmium in the puddles.by Matsuoka 3/28/2011 1:48:16 AM
- Please post the link Matsuoka.by Ralph Unger 3/28/2011 1:49:04 AM
- @pj There was a round of wondering earlier about that. Mostly about why there was never any followup. It's just another of those random, loose ends of data clustered around this.by RadioGuy 3/28/2011 1:49:41 AM
- For that TEPCO release, it's unclear: did they find ALL those elements listed, or just the ones they have amounts. For example for Co-56, it magically disappeared in their re-assessment, to now it shows "under the limit". Does that mean 0 or just under the minimum for safety reasons?by Jojo 3/28/2011 1:50:24 AM
- @Ralph Unger de.wikipedia.org "Die weitere Regelung findet mittels Steuerstäben aus Borcarbid, Hafnium oder Cadmium statt." you cannot find this in the English wiktionary.by Matsuoka 3/28/2011 1:52:03 AM
- U.N.’s Nuclear Chief Says Japan Is ‘Far From the End’ , www.nytimes.comby Jim Carver 3/28/2011 1:52:08 AM
- @Jojo Oh, super - it isn't as if Tc-99m decays to something radioactive with a 211,000 year half-life, right? Yeah, it's a beta-emitter, but it's still freakin' radioactive. :/by pj 3/28/2011 1:52:13 AM
- I would like an expert to explain to us what kind of test(s) would typically be used to detect concentrations of multiple isotopes in a water sample. Whether the test detects everything over a certain concentration (mass spectroscopy?) or only specific elements that are tested for chemically? I presume they are interested in finding out everything that is in the sample, not just specific elements of interest.by Sky 3/28/2011 1:52:24 AM
- These are the 27th enviromental monitoring samples www.mext.go.jpby elainekirk 3/28/2011 1:52:56 AM
- tepco got me totally confused. they analyzed the water and found iodine, cadmium, chlorine38, cobalt60, cesium137 and other nasty things in there that make some sense, but now i don't know if this is still valid.by Matsuoka 3/28/2011 1:55:30 AM
- @Sky We would look for a suite of minerals (chemicals) that have a particular distribution of isotopes to find a source area. They don't even have to be radioactive.by Jim Carver 3/28/2011 1:55:46 AM
- @Matsuoka Intentional confusion.by Bobby1 3/28/2011 1:56:32 AM
- @Matsuoka THey must have detected those elements, just "below the limit" for a danger. If they weren't there at all, why even list them on the report?by Jojo 3/28/2011 1:57:04 AM
- Okay, if they collect the sample at 0850 and don't actually assay it until 1850, would they even SEE any of the shorter-lived isotopes at all?! And for the metastable isotopes, you're talking more than a half-life later. This means the original activity was at least TWICE what they list unless they corrected for the decay (assuming first-order decay.... is that true/right for radioactive decay?).by pj 3/28/2011 1:57:08 AM
- The daughter products and their abundance tells a lot.by Jim Carver 3/28/2011 1:57:17 AM
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