The original ground water level was well above the current ground level. Surely because they knew this before building Daiichi they must have also built the waterproof systems in the reactor buildings to hold the ground water at least up to the current ground level.
If this is (was) the case...
This link is not working now, here is a working one with the same content:
http://www.nippon-sekai.com/main/articles/fukushima-daiichi-nuclear-power-plant-crisis/government-failed-to-release-some-radiation-data-after-the-accident/
I disagree wholly. Without facts there cannot be insights. "Facts" do not include only the basic facts about the plants but also the radiation measurements, the radiation forecasts and so on, all the new information that needs to be quickly analyzed as a basis for decision making.
When a...
It was 5.9:
http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/quakes_all.php
Edit: I am 100 % sure it was 5.9 a while ago. Just seconds ago they have updated it:
MAP 5.8 2011/08/23 17:51:04 37.936 -77.933 6.0 8 km ( 5 mi) SSW of Mineral, VA
So it's now 5.8.
Edit 2: And back to...
No, I am saying that 300 mSv/h can be explained by the meltdown and rising pressure/temperature which exceeded the design basis of the containtment. I think NUCENG also meant this.
The only "point" I wanted to make was that for this to happen the containtment probably has not much "safe...
I think this has been discussed before so I am making here a short summary.
From this (Japanese) TEPCO log one can find a log entry at 23:14 on the 11th day containing the words "300 mSv/h" which must be the same event we are talking about...
According to Bloomberg's original news the monitoring post was set to go off at high levels of radiation. But I guess if there would have been high levels of radiation 1.5 km from the no. 1 reactor also some other monitoring posts would have been triggered?
Surely this cannot be the only...
As far as I understand they have so far emptied the unit #5 and #6 sub-drain pits once but have not done it for the units #1 - #4.
The total amount for #5 and #6 was 950 m3 + 373 m3 = 1,323 m3.
http://www.nisa.meti.go.jp/english/press/2011/06/en20110630-1-2.pdf
(page 12 and 13)
Also the...
The information regarding the speed of groundwater flow has come from TEPCO itself:
http://mdn.mainichi.jp/perspectives/column/archive/news/2011/06/20110620p2a00m0na005000c.html
But I don't know how extensive their investigations regarding the groundwater properties has been.
A couple...
Here's how my logic goes...
There should be no debris lying in the SFP #2, should there?
So condensated steam is a good candidate, as well as contaminated seawater. This a positive scenario where one assumes that fuel is still intact.
Is there any ideas how much of the 93,000 - 98,000...
Just for a reminder... They also measured the SFP #2 skimmer surge tank (and also corrected the values of April 12th sampling of the unit #4 SFP?):
http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110531e19.pdf
I am making here a small comparision for a starter (as Bq/cm3)...
I just noticed something... I thought earlier that if there was a flow of contaminated groundwater into the sea we would see this in the radioactive levels of seawater (= increasing levels). Well, this happens to be a completely false idea...
In the drawing there is an arrow going from the RPV area into the SFP area.
Does this mean that they now have confirmed that there is a (small) leak from the RPV area into the SFP area?
I think this was something rmattila suggested a long time ago also as a possibility for the units #1 -...
NRC has now officially corrected the claim made by Gregory Jaczko that the unit #4 spent fuel pool would have dried up at some point: :biggrin:
Spent fuel pool never dried up at Fukushima plant: U.S. regulator
http://www.breitbart.com/article.php?id=D9NSMF980&show_article=1