Japan Earthquake

Japan Earthquake | Page 2574

79% of air fallout landed on ocean. So how do we then determine total releases so air released radiation doesn't get counted twice? www.forbes.com
by lillymunster 10/29/2011 9:17:25 PM

@lillymunster docs.google.com
by elainekirk 10/29/2011 9:18:24 PM

unit #4 condensate tank
2006
(Content of the Report from Tokyo Electric Power Company)
The Fukushima-Daiichi Nuclear Power Station Unit-4 (BWR, rated electric power; 784 MWe) had been operated at the rated power. Water of the condensate storage tank including tritium flew into the pure water make-up water system (hereafter called “the concerned system”) and about 4.7 x 1010 Bq (Becquerel) of tritium in total was released to the outside of the controlled area (the atmosphere and the surrounding environment). The exhaust to the atmosphere was released not through the waste processing facility with uncontrolled condition as steam of the auxiliary boiler whose source is water of the concerned system.
Radiation dose of the general public exposed by this event was 2.8 x 10-7 milli sievert/year and was about one 3.5 millionth of the dose limit (1 milli sievert/year) of the legislation.
There was no radiological impact to the environment.
The cause investigation and the countermeasures to prevent their reoccurrence will be conducted from now on, and the results will be reported to the Nuclear and Industrial Safety Agency. www2.jnes.go.jp
by elainekirk 10/29/2011 9:21:31 PM

As to the tanks, I learned that the experts are not worried about the tanks and their concrete foundations themselves in a quake. They worry about soil subsidence and liquifaction under them.
by Peter 10/29/2011 9:22:15 PM

@Peter have you seen the seismic evaluation jnes did re condensate tanks in general ? www.jnes.go.jp
by elainekirk 10/29/2011 9:23:27 PM

Does anyone know if we have these pretty pictures ? www.kantei.go.jp
by elainekirk 10/29/2011 9:28:37 PM

@Peter there is some missing earth below them. I can't tell if it sunk, shifted etc but there is the wavy ground all around them. So there was some soil changes. I have to wonder about the piping going through all those buildings to the reactor. Lots of places to break.
by lillymunster 10/29/2011 9:32:28 PM

@elainekirk I have not seen those yet. There is also a status sspreadsheet of ECCS system components. Going to grab all the diagrams out of that, save them with the rest of today's graphics and put them in the library.
by lillymunster 10/29/2011 9:35:37 PM

@lillymunster :)
by elainekirk 10/29/2011 9:35:56 PM

@elainekirk It has locations of equipment too! It has OP levels on many things including the RPV equipment - this is just chuck full of goodies. I need to kick my brain into high gear for a few hours and see what I can do with all these bits and pieces I have and this new stuff. I think I could almost make some sort of interactive model.
by lillymunster 10/29/2011 9:37:20 PM

@lillymunster the preceding doc has some info but you got the jewel in that one this is the preceding one www.kantei.go.jp
by elainekirk 10/29/2011 9:41:51 PM

@lillymunster , telling from Elaines seismic margin assessment doc, it does not look like the tanks buckled, but they may have shifted and sunk on one side or another.
by Peter 10/29/2011 9:42:05 PM

where was the water going apart from suppression pools this is June and they are still -
- The water in the Condenser of Unit 1 was transferred to the
Condensate Storage Tank. (From 10:33 June 15 till 09:52 June 16) docs.google.com
by elainekirk 10/29/2011 9:56:54 PM

from elaine's link, we finally got an english version of the nuclide table.
by Edano 10/29/2011 9:57:07 PM

@Peter the 2010 jnes assessment or was there a post quake jnes?
by lillymunster 10/29/2011 10:00:24 PM

back later the heater just exploded in the fish tank
by lillymunster 10/29/2011 10:00:39 PM

these October CST (tepco speak for concentrate storage tank) docs are only in Japanese but maybe somebody can glean something from the 30 instances of CST found in the doc www.tepco.co.jp and www.tepco.co.jp and www.tepco.co.jp
by elainekirk 10/29/2011 10:08:33 PM

@Edano added bonus then :)
by elainekirk 10/29/2011 10:13:43 PM

@elainekirk 1.1 tera points for you !
by Edano 10/29/2011 10:15:11 PM

@Edano rofl
by elainekirk 10/29/2011 10:17:06 PM

///i s'pose those trenches will have afected the stablility of the tanks with quake docs.google.com
by elainekirk 10/29/2011 10:28:15 PM

Study published: 20 October 2011 '...the largest radioactive noble gas (Xenon-133) release in history not associated with nuclear bomb testing.' www.atmos-chem-phys-discuss.net Please click on DISCUSSION at bottom for entire study discussion, including: Accidents events at the different units: Units 1, 2, 3 and 4--'THE MOST CRITICAL ONE'
by MaryW 10/29/2011 10:36:56 PM

Ahem - the reactor diagrams in this located some of the sensors on the RPV... www.kantei.go.jp

They also cite where those negative water levels actually are in reference to the location in the RPV.
by lillymunster 10/29/2011 10:39:10 PM

@lillymunster you just went completely over my head there I will stick to googling
by elainekirk via Home-education.biz 10/29/2011 11:01:19 PM

@elainekirk we have been trying to figure out location of a bunch of the sensors and those diagrams have them.
by lillymunster 10/29/2011 11:04:24 PM

@lillymunster Ah right ... goody...Elaine wanders off in the direction of the kettle in an attempt to awaken her brain cell ....
by elainekirk 10/29/2011 11:06:12 PM

@lillymunster i dont want to depress you, but we had the thermometers. what was missing, were the rad cams, and they are not in there. :)
by Edano 10/29/2011 11:10:39 PM

and the water levels are clear. 0 is fuel top.
by Edano 10/29/2011 11:12:15 PM

Type: Earthquake
59 minutes ago
Magnitude: 4.9
DateTime: Saturday October 29 2011, 22:16:02 UTC
Region: off the east coast of Honshu, Japan
Depth: 33.6 km
Source: USGS Feed quakes.globalincidentmap.com
by Edano 10/29/2011 11:16:16 PM

not listed at jma .... (?)
by Edano 10/29/2011 11:18:26 PM

@Edano I thought we were missing water level sensors also. I am betting after seeing these, someone has everything
by lillymunster 10/29/2011 11:19:14 PM

earthquake.usgs.gov this quake is a phantom, nothing on jma and RSOE EDIS in hungary ...
by Edano via Earthquake.usgs.gov 10/29/2011 11:25:21 PM

Another concentrate storage seismic doc this time from korea nov 2010 it is becoming obvious they had identified a weak point in seismic design but too late for fuku www.jnes.go.jp
by elainekirk 10/29/2011 11:26:03 PM

ah, they don't list seismic 0 quakes :) okay...
by Edano 10/29/2011 11:27:22 PM

At 2:55 on March 12, it was confirmed that water was continually being injected to the

reactor through the RCIC. After 2:55 on the same day, as it was confirmed that the water level

of the condensate storage tank had decreased, the RCIC water source was switched from the

condensate storage tank to the S/C in order to maintain the water level of the condensate

storage tank and to prevent the S/C water level from increasing, and water injection was

continued. docs.google.com
by elainekirk 10/29/2011 11:28:18 PM

2008 ~
1. Contents of the report submitted by Chubu Electric Power Co., Inc.
As part of a regular inspection of Hamaoka Nuclear Power Station Unit 1, on March 6 the power company started checking the condensate tank installed outdoors to see if it was becoming corrosive, as was the case with some other power plants. Today, March 17, the company found that the tank was thinner than the technically required thickness (3.0 mm) at one point (2.89 mm thick). As the tank fails to satisfy the required function, the company decided that the issue should be reported to NISA under Article 62.3 of the Law on the Regulation of Nuclear Source Material, Nuclear Fuel Material and Reactors (“Nuclear Reactor Regulation Law”).
No radioactive impact outside the plant will be caused by this event.
www.meti.go.jp
by elainekirk 10/29/2011 11:31:28 PM