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"It's a nested disaster … it's humbling to see an advanced technological society brought to it's knees. I don't know if you've seen these pics, but it gives you an idea of the scale of disaster: Japan: Before and After h/t the fan man

This is another clearinghouse diary for discussion and commentary about the ongoing nuclear disaster(s) in Japan.   For updated information on news and a timeline of the events following the March 11 Japanese Earthquake, visit the Mothership.  The Mothership is updated regularly and also provides a more extensive list of news and data sources, social media, crisis mapping and other relevant information.

If you would like to recommend this diary feel free to do so. All previous liveblogs published to the Japan Nuclear Incident group can be found here. The group also serves as an archive for Coverage@Kos.

The"ROV" (a Remote Operating Vehicle) is a 'child diary' for liveblog coverage of major breaking news stories. (The term was borrowed from the Gulf Watchers coverage of the Deep Water Horizon crisis.)

Given the seriousness of this situation, please use this diary for posting information DIRECTLY Related to coverage of the developing news!

To continue following and participating in the breaking coverage in Japan Nuclear Incidents series, click here and then click the heart icon underneath the profile picture to the Right. This will bring these diaries directly into your personal "stream."


News announcements from Japan between 2pm April 4 – 11:30 PM JST (gleaned from comments below, multiple sources linked below)

As Greenpeace continued monitoring radiation Monday, the government announced plans to lift restrictions on food if radioactivity data stay below the safety limits for a third straight week.  Plans are also being considered to break Tepco down into smaller companies and to unify the country’s  two different frequencies used in the country (50 Hz in the north and 60 Hz in the west).

Evacuees from a 30-kilometer range around the damaged Fukushima Daiichi nuclear power plant are not eligible for housing at a Tokyo hotel because they would need shelter for more than three months

4,080 bequerels of radioactive iodine-131 was detected in 1 kilogram of sand lances, a kind Teof fish, in the sea south of the troubled plant.

News headlines  Japan, Monday, April 4. Noon. (combined sources from Kyodo, NHK, Asahi, and IAEA: all links below)

TEPCO will discharge 1,500 ton of low level contaminated water in the sub-drain pit for Units 5 & 6 to prevent the water in the pit from leaking into the reactor buildings and potentially damaging safety-related equipment.

Atomic energy experts skeptical about proposal to drape containment buildings in sheeting to block further release of radioactivity

TEPCO to install  silt-barrier fences to prevent further spread of nuclear contaminants in seawater (see photo h/t peraspera)

  • 4/3 @ 11:17 PST update on Japan's work on  afternoon 4/4 JST peraspera: On Monday workers poured a white liquid into a tunnel leading to the pit. The operation was undertaken to determine the exact route the water is taking from the pit near the plant's Number 2 reactor to the ocean. But the utility firm says the white liquid did not flow into the pit and that the contaminated water must be following other routes.
  • An alternative plan to stop the leak scheduled for later today. If unsuccessful, chemicals may be used to “harden the area.’

External power supply is now being used to power the pumps injecting fresh water into Units 1, 2 and 3 reactors.

Radiation levels gradually decreasing in many areas around the nuclear plant.

Govt did not reveal high level radiation estimate

Overview of top news

  • 4/3 @11:37 PST peraspera: Authorities know the water in the cracked concrete shaft, then, is emitting at least that much radiation -- which equates, at a minimum, to more than 330 times the dose an average resident of an industrialized country naturally receives in a year
  • 4/3 @ 9:38 PST. HKHeadhunter: Japan's target of slashing greenhouse gas emissions by 25 percent by 2020 from 1990 levels could be reviewed in the wake of the ongoing nuclear crisis, top government spokesman Yukio Edano hinted Monday. h/t  (kyodo)
  • 4/3 @ 9?36 PST procrastinator john" Oil-fired power plants coming back on line
    An article in the Nikkei Shinbun reports that rolling blackouts were avoided again today, in part because consumers have cut back on electricity use but also because some of the generating units at oil fired plants in Yokohama link
  • peraspera Sunday April, 3 18:47 JST Kyodo, Nikkei, Mainichi  The Japanese government indicated that it will be months before the Fukushima plant is no longer releasing radiation.
  • h/t ricklewsive Sunday, April 3, 2011 The Japan Times Very good schematic of the leaky pit
  • h/t ricklewsive Sat Apr 2, 2011 12:40pm EDT Reuters Patching the crack in the pit leaking radioactive water into the ocean failed. They are going to try soaking the water up with an absorbent polymer.
  • h/t stunster 2:26am EDT AP An unnamed TEPCO employee said that damage to the reactors ranges from 25 to 70 percent.
  • h/t Just Bob Sat Apr 2, 2011 7:16am BST (2:16am EDT) Reuters
    A cracked concrete pit at the #2 reactor was discovered to be leaking. Radiation in the pit is 1,000 millisieverts per hour. TEPCO is going to try repair the crack with concrete.
  • h/t  ricklewsive April 2, 2:17 JST from

Recent Events

Regularly Updated Data Sources

@Kos: A database of temperature, pressure, radiation levels, etc readings over time can be found in: The Daiichi Database  This is an evolving diary that will be updated regularly.
Japanese Atomic Industrial Forum (JAIF)
RSOS Emergency & Disaster information Services - Japan
Daily Telephone Media Briefings from Union of Concerned Scientists The Situation in Japan
EPA RadNet Map View & EPA's Radiation Air Monitoring
Scribble Live
Fukushima Data Page:  Data for all 3 reactors, as well as a good chunk of data over time: pressure, water flow, core nozzle temp, core bottom temp
Japan Municipal Water Charts  (in Japanese)


Best News Sources

Kyodo Nuclear News Feed
NHK Japan Live
OilDrum: Fukushima Open Thread - Tue 3/29
Asahi on Facebook
Tepco's webcam
Fukushima Wikispaces
Bloggers for Japan

Google Earth Engine (download required): Radiation Over Japan. Visit Pachube for mapping.

Rules of the Road

Due to extensive coverage, Coverage@KOS is including diaries covering two-day periods. All coverage is then archived to the group page.

You can assist us in including relevant diaries by providing links to any postings we may have missed to insure they are included in this coverage. Also, note below if diaries are being reposted to other groups so we can direct readers there as well.

Please be kind to kossacks with bandwidth issues. Please do not post images or videos. Again, many thanks for this.

Remember when posting to the thread:  STICK TO THE FACTS. Source and link all new information.  (This includes insuring authenticity of twitter sources.) Both the Mothership and the ROVs are for reporting and discussing the developing news. Neither space is for opinions or for editorializing on the subject of nuclear energy.


Follow the Japan Nuclear Incident group for 24/7 coverage. Click on heart next to the group name to follow. After following the group, you can access coverage through your personal stream. To join the group, send an email (sidebar to the right).

Originally posted to Japan Nuclear Incident Liveblogs on Sun Apr 03, 2011 at 08:06 PM PDT.

Also republished by Nuclear Free DK.

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