Fukushima Dose Rates

[wlrun3@aol.com]

http://www.tepco.co.jp/en/nu/fukushima-np/f1/images/f1-sv-20110922-e.pdf

[spentfuel]

Thanks

As info I have seen a few other documents like this and I dont know if its just me but I cant see any numerical data

other than the legend and a few other places like "soil"  I can only see dots ..........

sf

[wlrun3@aol.com]

Thankyou for the info...I am using an iPhone and can see clearly all the text...most interesting is the July survey of > 10,000 mSv/hr (>1,000 R/hr) at SGTS piping between and slightly west of Unit 1 and Unit 2.


http://http://www.tepco.co.jp/en/nu/fukushima-np/f1/index3-e.html

[storm13]

Thanks

As info I have seen a few other documents like this and I dont know if its just me but I cant see any numerical data

other than the legend and a few other places like "soil"  I can only see dots ..........

sf

You need to let Acrobat install the Japanese fonts for them to display.  The number's aren't in Japanese, but you need the fonts installed to read them...

[spentfuel]

You need to let Acrobat install the Japanese fonts for them to display.  The number's aren't in Japanese, but you need the fonts installed to read them...

Thanks storm13 was not sure if it was a firewall issue or what

Ill give that a try if my FW will allow it

And thanks for the link wlrun3 
 
I can see the data in in the 8/22 survey

Now I wonder what SGTS stands for ?  Second grate torus ??

sf

[matthew.b]

Thanks storm13!  I figured I didn't need Japanese since I couldn't understand it.  I didn't consider that they might be Japanese Arabic numbers instead of English Arabic numbers 

Now I wonder what SGTS stands for ?  Second grate torus ??

Standby Gas Treatment System.

It is the filter and stack system for treating the vented gas from containment.

[wlrun3@aol.com]

The INPO report

   http://www.nei.org/filefolder/11_005_Special_Report_on_Fukushima_Daiichi_MASTER_11_08_11_1.pdf

[Marlin]

The INPO report

   http://www.nei.org/filefolder/11_005_Special_Report_on_Fukushima_Daiichi_MASTER_11_08_11_1.pdf

Thanx good info but a bit much to digest in one sitting.

[wlrun3@aol.com]

The map of the site, the dose rate survey of the region in mR/hr and the INPO authorship was what I thought would be of interest.

[Marlin]

The map of the site, the dose rate survey of the region in mR/hr and the INPO authorship was what I thought would be of interest.

I find the whole thing interesting just not light reading.

[Bonds 25]

We sure miss you here at Columbia, Bill.....the PAP just isn't the same, and it certainly isn't as clean and tidy 

[wlrun3@aol.com]

Thankyou, I miss you too.

[wlrun3@aol.com]

   It looks as if all the fuel in unit 1 melted, breached the reactor vessel, melted through several feet of sub pile room concrete floor and came close to melting through the metal bottom of the dry well.
   Correct me if I have this wrong.

 http://mdn.mainichi.jp/mdnnews/news/20111130p2g00m0dm147000c.html  


Modification to this post...it looks like I was wrong. The fuel apparently only melted through 5% of the concrete above the metal bottom of the drywell.

[wlrun3@aol.com]

"The melted core material did not even get close to exiting the container that was designed to retain it. And this was a case where the reactor was operating at full power and then lost all cooling within a few minutes. It is hard to get much worse than that."

     http://atomicinsights.com/2011/12/more-accurate-headline-would-be-fukushima-containment-worked.html

[wlrun3@aol.com]

[wlrun3@aol.com]

[wlrun3@aol.com]

Quote from: wlrun3 on December 02, 2011, 12:54:43 PM
What is between the sub pile room floor and the metal bottom of the drywell in a Mk 1 BWR?

In the case of Fukishima there is 7.6m of concrete:

In Japanese:

http://mainichi.jp/select/today/news/20111201k0000m040066000c.html

Bablefish translated

http://babelfish.yahoo.com/translate_url?doit=done&tt=url&intl=1&fr=bf-home&trurl=http%3A%2F%2Fmainichi.jp%2Fselect%2Ftoday%2Fnews%2F20111201k0000m040066000c.html&lp=ja_en&btnTrUrl=Translate

[wlrun3@aol.com]

http://online.wsj.com/article/SB10001424052970204262304577069302835999204.html?mod=wsj_share_in_bot


http://mdn.mainichi.jp/mdnnews/news/20111208p2a00m0na016000c.html


Three quarters of the way through the concrete and large holes in the reactor vessel?

[wlrun3@aol.com]

http://www.tepco.co.jp/en/nu/fukushima-np/images/handouts_111130_08-e.pdf
http://www.tepco.co.jp/en/nu/fukushima-np/images/handouts_111130_04-e.pdf


"Summary...Even in the case of Unit 1, which had the deepest erosion, the erosion had not reached to the steel shroud of primary container vessel and stayed inside."

Thankyou matthew.b.
Best information I've seen so far.

[DJ@Retired]

This is the INPO report link for Fukushima-Daiichi-Nuclear power plants
http://enformable.com/2011/12/november-2011-inpo-special-report-on-fukushima-daiichi-nuclear-accident/?utm_source=rss&utm_medium=rss&utm_campaign=november-2011-inpo-special-report-on-fukushima-daiichi-nuclear-accident

[wlrun3@aol.com]

DJ,
   Good to here from you..thankyou for the INPO report.
Bill

[HydroDave63]

http://www.france24.com/en/20120627-record-radiation-levels-detected-fukushima-reactor

AFP - TEPCO, the operator of Japan's crippled Fukushima nuclear plant, said Wednesday record amounts of radiation had been detected in the basement of reactor number 1, further hampering clean-up operations.

TEPCO took samples from the basement after lowering a camera and surveying instruments through a drain hole in the basement ceiling.

Radiation levels above radioactive water in the basement reached up to 10,300 millisievert an hour, a dose that will kill humans within a short time after making them sick within minutes.

The annual allowed dose for workers at the stricken site is reached in only 20 seconds.

"Workers cannot enter the site and we must use robots for the demolition," said TEPCO.

The Fukushima operator said that radiation levels were 10 times higher than those recorded at the plant's two other crippled reactors, number two and three.

[Bonds 25]

Just took a class on Fukushima......some crazy stuff.  A couple Control Room Operators received ~65 REM of total exposure (mostly internal) because they didnt have respirator glasses and chose seeing over a protection factor.  Still, given the situation, no worker has been exposed to 70+ REM......I find that amazing.  The Fukushima work force has done an incredible job.

Lots more work to do, however