Published: February 13th, 2012 at 7:00 pm ET
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Yomiuri Shinbun translated by EX-SKF:
[...] TEPCO conducted the test of the electric circuit of the thermocouple from the central control room from 2PM. The electrical resistance was higher than normal, which would result in the temperature indicated by the thermocouple higher (than the actual temperature). Right after the test, the temperature showed 342 degrees Celsius, and it rose sharply at one time and went overscale. [...]
Title: #Fukushima I Nuke Plant: Additional Info on That “Broken” Thermocouple on Reactor 2 RPV
Source: EX-SKF
Date: Feb 13 2012
[... During] the press conference, Matsumoto was particularly announced by the 2 questions:One was posed by a reporter from Yomiuri Shinbun (he’s a regular). The reporter asked if the test itself broke the thermocouple. (Bingo…) Matsumoto denied the possibility, saying the test was conducted distantly from the central control room, not at the thermocouple (no way, as it is inside the CV).
The other was posed by an independent journalist who kept asking Matsumoto if TEPCO was consulting the manufacturer of the thermocouple for insight and technical assistance. That really set off Matsumoto, who immediately said TEPCO was fully capable of the maintenance of the thermocouples at the plant. Despite repeated questions, Matsumoto refused to give the name of the manufacturer or whether the representative of the manufacturer was on hand at Fukushima I Nuke Plant.
Never mind that this is not an ordinary maintenance of the thermocouples in a functioning reactor. [...]
Read the report here
Published: February 13th, 2012 at 7:00 pm ET
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sending...
To everything, spin, spin, spin…….
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@dosdos
You have some funny one liners. I like the other one too.
"If thine thermocouple offends thee, pluck it out!"
thanks for the laughs
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5.6 in Calif http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/nc71734741.php
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A bit of shaking here on the North Coast. Dutchsince has an interesting theory about how this 5.6 earthquake relates to some other regional quakes in past 24 hours. There is earthquake activity at some long dormant volcanoes in the US.
http://sincedutch.wordpress.com/
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We can see that TEPCO is not try to solve the problem but just to cover it up.
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Too many cooks in the kitchen… trying to serve up some fried Tepcos.. delicious when served with a sprinkle of cesium and a dash of strontium, with a little plutonium icing on top.
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when even thermometers are not reliable, there is no way that nuclear energy can be safe, just impossible.
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Excellent point. Thanks.
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Methinks the man (Matsumoto) protests too much. I am surprised they are allowing a free flow of questions…look for them to go back to a more controlled press conference format.
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TEPCO : we will never let the temperature out of control happen again. From now on we will only buy thermometers that can only show temperature below 60 degree C. Problem solved.
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LOL
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fukushima 福岛 第一Records of radioactive fallout in Fukushima show a significant increase in rate of cesium 134 and 137 from measurements of 11 to 12 February 2012: in one day, cesium-134 passes of 4.45 MBq / km to 98.2 MBq / km ² and cesium-137 passes of 6.46 MBq / km ² to 139 MBq / km ².
http://fukushima.over-blog.fr/article-augmentation-de-la-radioactivite-a-fukushima-99252427.html
Tables
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Yes, atmosphere readings are trending up to April levels again for some reason as well.
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Hi rooks,
You posted yesterday or earlier today about your situation in Japan and I didn't have time to reply then. Stacy another poster has a similar situation. I posted to her and maybe what I said to her about being stuck in Japan would be of some help to you especially now that the nuclear plant is bubbling again. Link below, my post there is two entries long about taking an "Evacuation Vacation"
http://enenews.com/reuters-contamination-concerns-growing-high-radiation-levels-270-km-from-meltdowns-gundersen-over-half-of-japanese-living-in-contaminated-areas-includes-areas-400-km-away-from-fukushima/comment-page-1#comment-204473
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From Zero Hedge blog:
"Yea the Thermomentor is broken, just like all the rest of the devices that said high levels of radiation also. It's real easy to see if it's broke or not. Just graph the temperature change and find out what type of thermostate is being used. If it's the type that once broken it spikes quickly to maximum and the graph shows a gradual (relative) increase in the temperature you'll know it's reading right. If it's one that once broken it gradually moves up just compare the temperature graph to other temperature graphs when they where fighting the heating of the core, It shouldn't mimick the nuclear pile.
In fact to be honest with you they are totally lying and let me explain why. In a reactor setting you have temperature probes that are sunk through the metal containment via a tapped housing for the reactor and for a used pool a lowered probe into the water. The thermostat is sleaved into a thin metal container of some type (which can protect the thermostat from damage directly in the water or area around the pile), but the temperature is still able to translate to the thermostate. The thermostat isn't solid state at that point, it's a real fancy version of a generic thermostat but instead of mercury it could be using another metal that is heat sensitive. At the top of the thermostate is the connection for a thermocouple which would translate the heat into an electrical voltage which gets translated to a device via the thermocouple wire to a device that is most likely solid state and then that will transmit to the outside world or whatever computer is the output. So if the solid state is destroyed via the radiation then it would show on the computer screen as if it's a short in electronics (-999, blinking at the top of it's measurement etc.).
continued…
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"…Now the problem is if the pile got so hot that it melted the thermostat and the temperature went up and past it's measurement the same way. If it melted through you would be able to tell via the instant spike as I said before. If it's the electronics on the solid state controller for the thermostat you could still tell from the way it's responding. I mess with these type of controllers at work and no how they function that is why them saying it's broke is BS, especially since if it was broke the controller would be in a form of error not getting a signal (which you can bet your last dollar that they would have on a nuclear reactor). And since it's getting a signal and the signal isn't tapped out to the high but real high, it's definitely reading true.
Remember, in electronics it's either 1 or 0, on or off, or spiking it's way real quickly (seconds) to 1 or 0."
-original poster was Buck Johnson
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http://www.zerohedge.com/contributed/fukushima-reactor-temperature-surpasses-752-degrees-%E2%80%A6-more-4-times-maximum-%E2%80%9Ccold-shutdow
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That poster is a fool and he does not know what he is talking about. Sheesh!
All electronics are not digital!
The temp probes are analog and not digital.
My post earlier:
http://enenews.com/reporter-asks-tepco-caused-device-break-nuclear-experts-doubt-foregone-conclusion-instrument-failure/comment-page-1#comment-204531
I have worked with electronics since I was a teenager.
A temperature probe is a thermister.
It varies its resistance with temperature.
It can have a negative temperature coefficient.
Or It can have a positive temperature coefficient.
The former decreases it's resistance with a temperature rise.
The latter will increase it's resistance with temperature rise.
You do measure with these with an Ohm meter.
A shorted thermister will invariably be zero Ohms.
An open thermister will invariably be infinite Ohms.
A cut wire leading to a thermister will be infinite ohms, open.
Cut wires shorted together leading to a thermister will be zero ohms.
A thermister that has a smooth rise or lowering of resistance, with temperature rise, will almost always be good, as we saw in the incremental rise in the temp on #2.
A reading of 500 to 550 ohms means nothing till you match that up with the manufacturers temperature/resistance chart for that part number.
It is amazing the disinformation that is spewed!
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(Cross post from:
http://enenews.com/reporter-asks-tepco-caused-device-break-nuclear-experts-doubt-foregone-conclusion-instrument-failure )
The thermometers are probably something like (an older version of)
http://hpsweb.honeywell.com/NR/rdonlyres/A36214C4-8966-4D08-9510-30D00BEE9CC8/31598/SL53589.pdf
The thermocouple is in the probe and that connects to the electronics in the head which send a 4 to 20 milliamp signal. By sticking an ohm-measuring device over the lead to the transmitter you are measuring what the electronics in the head are doing, not what the thermocouple is doing.
Another spec sheet:
http://hpsweb.honeywell.com/NR/rdonlyres/A36214C4-8966-4D08-9510-30D00BEE9CC8/31598/SL53589.pdf
talking about a similar 4-20mA unit indicates that the rated resistance of the 4-20mA circuit is 0-1100 ohms.
So the reported Resistance 500 to 530 ohm looks nicely mid-scale for a device in good health and doesn't suggest a problem with the bit they have tested.
Quite what state the probe itself may be in (if its been drizzled with corium at 1000C) who knows. SOmebody may be able to look at the entire temp record for that probe since the disaster started to see if it was trashed from early on. I don't have access to that.
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I completly agree with you on this, its mid range and whats intresting is the range(if from 0 to 500 deg Cels, you can estimate a tempreading at ca. 250 deg Celsius, aprox) scales can be altered, but the resistance is the same, if not "gaugetube" is completly broken.
Hysterese is someting else, and the level of drivel continues.
The only thing right now that I am 100% certain of is that we are fed bullshitt, and they apeare to be feading us even more bullshitt.
peace
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