Japan Earthquake: nuclear plants

triumph61

Quote by Rive

IMHO the yellow thing is the glasswool insulation of the building roof.
It's expected to find more hi-rad concrete pieces around line between the reactor and the first one. Maybe there'll be the next.

There is that 'tour' video, linked previously: this part of U3 is recorded in good quality. And thet other video when the firetruck is spraying U3 is also might be useful.

IMHO it's some internal catwalk of U3, preserved in surprisingly good condition. The FHM is much more massive piece of metal.

Ps.: Can somebody please confirm, that this video is about U4? http://www.youtube.com/watch?v=iAffjP1nrlA

Glasswool??? Its a heavy Glaswool.....
In the tour Video, this Place is not seen.

Borek

Quote by zapperzero

You are telling me I misunderstood, based on conversations you had with other mentors. Can you please share the additional information you gleaned from these conversations?

There is no additional information, not being a native speaker I just asked how to understand the Reuters news piece. I was told my understanding on the text is correct and text doesn't imply cooling systems have been not repaired on March 15th.

Caniche

Quote by Zallia

Have you all seen the live cam?

http://www.youtube.com/watch?v=Ck_KE...layer_embedded

Looks like fires breaking out in #3 and #4.

Strangely unavailable now?

zapperzero

Article about the first few days of the crisis:

http://search.japantimes.co.jp/cgi-b...0110505n1.html

Here's the thing I don't remember having seen stated before:
"Twice, radiation levels at the plant reached 1 sievert an hour. "

Sorry if this is old info. I have read the whole thread, but it has been a while since.

Borek

Quote by Caniche

Strangely unavailable now?

Works for me.

Bandit127

Following on from a previous post about valid data (OK - possibly a rant) in which I asked us to spare a thought for the TEPCO Engineers that are trying to make good decisions based on woefully indaequate data.

Here is an update from TEPCO detailing the improvements they will be making for the Technicians and other front line staff.

It is comforting to know that (in the worst case) they will be getting showers by June.

I have regularly worked in a Tyvek 'lab coat' (not a full overall) in a cleanroom environment on machinery that runs at 200 Bar, 500 kN and 250°C - i.e. fairly heavy and hot work - and I know what that 'micro climate' feels like and it is not pleasant.

Boy, would I be looking forward to a shower in June...

After the accident on March 11th, we have been making every effort to
restore the status of the nuclear power stations, and we believe that
improving the living environment and productivity of the workers will lead
to earlier restoration of the condition.
Therefore, we will construct some prefabricated temporary dorms, where
workers will be entering one after another from late June, and organize an
environment so that workers can concentrate on their work.
In addition, until then, the following improvements will be carried out at
the current resident facilities.

1.Fukushima Daiichi Nuclear Power Station
Due to the high radiation dose around the Main Anti-Earthquake Building,
meals are mainly limited to preservation food. Therefore, from early May,
two meals (lunch and dinner) out of three meals everyday will be served
from Fukushima Daini Nuclear Power Station Gymnasium as a lunch box
(bento).
Further, this gymnasium will be equipped with double-deck beds before
mid May, with availability of shower.

2.Fukushima Daini Nuclear Power Station
In regard with the living environment at the administration office,
showers will be newly installed by the end of May, and increase the use.
In regard of meals, bread (in the morning), bento (at lunch and dinner)
is already being served from May 1st.

3.Others
Also at J-Village where people and supplies are relayed, bento will be
served for two meals (lunch and dinner) out of three meals everyday. In
addition, showers will be made partly available by the late May, and
more showers and toilets will be made available by the end of June.

From:
http://www.tepco.co.jp/en/press/corp...1050409-e.html

Spare a thought for these people.

MiceAndMen

Quote by fluutekies

Here a summary after 7 weeks: http://allthingsnuclear.org/post/517...-7-week-update

Here a translation of the Plant Tour Video: http://www.houseoffoust.com/fukushima/5_3_vid.html

Nancy Foust can be incredibly dumb at times. At this page
http://www.houseoffoust.com/fukushima/5_3info.html
she's referencing the Physics Forums and a couple of posts in this thread specifically. She then completely fails to to understand this article at CNBC
http://www.cnbc.com/id/42100529/Reac...een_Questioned
which refers to fears that the torus could jump off the floor during a steam release. Nancy thinks it has something to do with the RPV and lateral forces. She uses all that to arrive at some sort of conclusion which she is unable to even articulate.

Be very, very careful of anything on that site other than the pretty pictures.

Borek

Quote by MiceAndMen

Nancy Foust can be incredibly dumb at times. At this page
http://www.houseoffoust.com/fukushima/5_3info.html
she's referencing the Physics Forums and a couple of posts in this thread specifically. She then completely fails to to understand this article at CNBC
http://www.cnbc.com/id/42100529/Reac...een_Questioned
which refers to fears that the torus could jump off the floor during a steam release. Nancy thinks it has something to do with the RPV and lateral forces. She uses all that to arrive at some sort of conclusion which she is unable to even articulate.

At least now she already knows she was wrong.

MiceAndMen

Quote by elektrownik

Some people think that this is yellow reactor cap... or part of it...

The circled thing on that photo looks like a piece of steel framework. The primary containment vessel cap is yellow, but not the reactor cap. Whatever is circled on that photo is neither round nor yellow.

Who are "some people"?

Is it just me or has the level of baseless speculation reached new heights here over the last week?

jlduh

The water is mainly concentrated from the tsunami that has leaked into the plant and then got contaminated

http://www.houseoffoust.com/fukushima/5_3_vid.html

SO this is a new confirmation (I mentionned it already from sources cited in an other article) that part of the water in the basement is from tsunami, then got contaminated by leaks from reactors.

MiceAndMen

Quote by Borek

At least now she already knows she was wrong.

Hah! I think she doesn't care. She obviously reads this thread but is unwilling to join in the discussions for some reason.

jlduh

Quote by triumph61

Inside NP Austria Zwetendorf
http://www.zwentendorf.com/Tour_AkwZ...entendorf.html

Just in case people would wonder how this tour is possible in this BWR 730 MegaWatts nuclear power plant, just read the history around this plant which is unique in the world: "The Zwentendorf Nuclear Reactor is the safest atomic power plant in the world – simply because it never went into operation."!

http://www.nuclear-power-plant.net/i...n&item=history
http://www.nuclear-power-plant.net/i...=en&item=facts

Caniche

Quote by fluutekies

Here a summary after 7 weeks: http://allthingsnuclear.org/post/517...-7-week-update

Here a translation of the Plant Tour Video: http://www.houseoffoust.com/fukushima/5_3_vid.html

Quote by Borek

Works for me.

Available again . no.'s 3 +4 show utter carnage not much chance of any functional infrastructure remaining,no. 2 looks worse though ,that is big emission volumes ,somethings cooking?

imandylite

Quote by jlduh

http://www.houseoffoust.com/fukushima/5_3_vid.html

SO this is a new confirmation (I mentionned it already from sources cited in an other article) that part of the water in the basement is from tsunami, then got contaminated by leaks from reactors.

This was revealed a few weeks ago in one of the TEPCO and Jap Government press meetings. It was an answer to a question on process for the low contamination of large volumes of water.

The answer was that small amounts of highly contaminated water was leaking from earthquake damaged primary pipes and finding its way into tsunami flooded areas.

I have found links to some of these press briefings. But, sorry, didn't bookmark. They do exist and are usually over an hour (sometimes two) in length. The main points of interest are the answers given by representatives to questions asked by invited journalists. The problem I have found is that the journalists seem not to have a scientific or engineering background.

jlduh

Does somebody has an idea of what Tepco means when they consider the use of these "existing tubes" to try to cool the reactor N°1? Which tubes are these?

http://www3.nhk.or.jp/daily/english/04_18.html

Tokyo Electric Power Company plans to circulate water in the reactor's containment vessel with the use of tubes that are already in place.

The water will be sent to a heat exchanger that will be installed near one of the reactor building's entrances.

Then the water will be pumped through a cooling tower outside the building before being returned to the containment vessel via the tubes.
[...]

The company says the system is expected to circulate about 100 tons of water per hour to cool down an estimated 1,500 kilowatts of heat radiating from fuel rods in the reactor.

It says once the new system is put into operation, it should lower the temperature of the fuel in the reactor to below 100 degrees Celsius within a few hours to a few days.

Dmytry

Quote by Bandit127

Boy, would I be looking forward to a shower in June...

From:
http://www.tepco.co.jp/en/press/corp...1050409-e.html

Spare a thought for these people.

Ohh my god. radioactive contamination and no showers. Guys, this is officially far, far more messed up than Chernobyl. This is just terrible.
(It is hard to imagine how terrible it is, though, and easy to understate)

zapperzero

Quote by Dmytry

Ohh my god. radioactive contamination and no showers. Guys, this is officially far, far more messed up than Chernobyl. This is just terrible.
(It is hard to imagine how terrible it is, though, and easy to understate)

I promised to refrain from speculation so, just facts. Among past posts in this thread you will find some linking to pictures of the Dai-ichi emergency centre. The people there are sleeping/resting/eating while dressed in their tyvek suits.

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zapperzero	Article about the first few days of the crisis: http://search.japantimes.co.jp/cgi-b...0110505n1.html Here's the thing I don't remember having seen stated before: "Twice, radiation levels at the plant reached 1 sievert an hour. " Sorry if this is old info. I have read the whole thread, but it has been a while since.