Skip to comments.Japan: Fukushima No. 2 reactor temperature up to 82C, but not critical: TEPCO
Posted on 02/12/2012 5:46:42 AM PST by TigerLikesRooster
Fukushima No. 2 reactor temperature up to 82C, but not critical: TEPCO
TOKYO (Kyodo) -- Tokyo Electric Power Co. said Sunday the temperature at the bottom of the No. 2 reactor at its crippled Fukushima No. 1 nuclear plant rose further to 82 C, but the reactor has not gone critical.
While the thermometer reading at shortly after 2 p.m. marked a new high since the reactor attained a cold shutdown in December, the utility known as TEPCO said it has confirmed that sustained nuclear reactions are not taking place in the reactor as no radioactive xenon has been detected inside its containment vessel.
TEPCO reported the latest development immediately to the Nuclear and Industrial Safety Agency of the Economy, Trade and Industry Ministry as the temperature exceeded the limit of 80 C designated by the company's safety regulation for maintaining a cold shutdown, it said.
It is considered desirable to keep the temperature below 80 C, while the bottom of a reactor pressure vessel must be kept below 100 C in a stable cold shutdown, in view of the margin of error of thermometers, according to TEPCO officials.
(Excerpt) Read more at mdn.mainichi.jp ...
So, I have to ask this time why the guys in charge of this need to tell me this is not a "critical temperature". ~
This is an undifferentiated pile of radioactive waste materials dumped out of crushed or opened fuel rods ~ so what's in there?
” What happens then?”
Shrimp become 2 feet long and fish have two heads.
There is zero chance of any of the reactors going critical. The reaction stopped instantly when the reactors were scrambled and the boron rods dropped. ( well not instantly but close enough )
Looking forward to the 40 foot long squid. Calamari for a 1000?
The sushi that ate Sendai !
These guys need a very wide margin of error.
Yes, and it comes with a pretty green glow that you can enjoy for days.
Ok, so what does it matter that the temperature is increasing?
Again there is zero threat of going critical.
It means that the cold shutdown lie is dead. Tepco/Japan just does not want to give up on that dead horse yet. They are claiming sensor failure and that temperature is not the main metric to determine Cold Shutdown Conditions. These Japanese Nuclear engineers are starting to sound like Global Warming proponents. Warmth causes snow - Temperature has nothing to do with Cold Shutdown.
The main problem with the high temperature readings is that it means they have no clue as to what they are doing. But hey, some of us already knew that. We are in uncharted territory. We need to know what is causing the high temperature. It could be heat coming out of the hole where the corium melted reactor mess is digging into. Or it could be heat from some of the remaining as yet unmelted core that still resides in the RPV with a big hole in the bottom of it. And recriticalities have been ongoing. They have measured radioactive iodine around Japan off and on ever since last March. You see, once the core melts, there is no containment and no shutdown. The control rods have also melted.
So temperature sensors within reactor #2 are failing after reading high temps. Tepco is losing the ability to determine what is happening within the RPV of reactor #2.
At the same time they are telling us it’s not returning to criticality ~ or something like that ~ RETURNING? It’s been there? ~ without sensors they are blind.
Seems like they are experiencing a new problem each week.
"Fukushima Daiichi No. 2 temperature update
This writer's assumption of February 7 seems now confirmed by TEPCO, who are now saying that the high-reading instrument near the bottom of the reactor vessel at their 1F-2 plant is likely failed. The detector has failed a resistance check performed by TEPCO, meaning that the indication is confirmed incorrect.
It is thus safe to disregard this one outlier in terms of temperature readings at 1F-2 and continue to consider the state as announced previously by TEPCO and the Japanese government as essentially 'cold shutdown.'"
Basically confirmation that the instrument has failed and is giving false readings. I called it as well. So much for the "uncontrolled criticality" fearmongers, who have been wrong all along.
They're doing it by the seat of the pants ~ not with hard, cold logic and reason based on a full understanding of the processes they're herding like cats.
One report a year ago (based on TEPCO data) said there may well be 600,000 spent fuel rods AT THIS SITE underneath the reactors.
I guess that was a smart thing to do ~ so that when they get a meltdown....... well, maybe that doesn't go critical either!
I'm adding you to a thread where the topic is EARTHQUAKES and how we might well be able to build earthquake proof facilities ~ by making them INVISIBLE to wave forms generated by earthquakes. Thought you might like to see what the mathematicians and geologists are coming up with.
I don't think there can be so many instances of this type of language and it merely be my fault for not understanding ~ these things are NEVER supposed to go critical under these conditions, nor be capable of returning to criticality!
Mine is a world of correct grammar and perfect spelling. Words have meanings. Nuance has implications.
And what about the 600,000 spent nuclear fuel rods?
As far as the "600,000 spent fuel rods", I'm not afraid of them. Why? Because I understand the science, I am a grown up and scare stories for the kiddies don't frighten me anymore. I've been around similar used fuel storage pools and nothing bad happened, nor will it happen. The hysterical fear-mongering "reports" right after this event were falsehoods such as "the fuel pool went critical". It did not. Another rumor said that the pool had "caught fire". It didn't. Another said the fuel pool "went dry". It didn't. Another said it had collapsed to the building floor. It didn't. There has been fear monger after fear monger put forth lies and scare mongering rumors, none of which has proved true! The number of liars among the fear mongers vastly outnumbers any "lies" from TEPCO or the Japanese government!! And those have caused more harm than any radiation release has!!!!!!
(See, others can use exclamation points too!!!!!!!!!!!!!!)