power – strom und macht

3/11: “Reactor 3 Steam Explosion “


Susanne Gerber

Video from March 14, 2012, around 11:01AM, explosion in the Reactor 3 building translated by EXSKF:

At ~1:15 in

Plant Manager Yoshida at 1F: HQ! HQ! It’s bad! It’s bad!

HQ: Yes!? Yes?

Yoshida: Reactor 3, probably steam explosion, it just happened!

HQ: (in a weak, almost disappearing voice) Alright… (someone else) O..OK.. Emergency communication…


HQ: That, that is the same as Reactor 1 [explosion], isn’t it?

Yoshida: Yes, in the building, inside the Anti-Seismic Building here, we can’t tell, but a side-way shake, clearly different from an earthquake, came, and there was no after-shake like in an earthquake. So I think this is an explosion, just like what happened in Reactor 1.

At 3:20 in

HQ (Probably Mr. Komori?, executive director, making a phone call to NISA): At 11:02AM, (was that 11:02?), at 11:02, in Reactor 3, there was a possibility of hydrogen explosion, we’ve been just informed by the plant. It’s the first report…

US Nuclear Regulatory Commission transcript excerpt from March 18, 2011:

CHAIRMAN JACZKO: […] Just go back one more time and, and look and see if you can’t come up with a, with what I would call a true worst-case scenario; namely, the worst-case that is physically possible.


CHAIRMAN JACZKO: See if you can do that because I, I have to believe that there is no possibility in a light-water reactor design to reject an entire core. I mean, that’s basically steam explosion; isn’t it?



Filed under: Accident, Fukushima

Yes, very similar


Susanne Gerber

Nuclear Expert Arnie Gundersen on Unit 3: Because of the fact that a few pieces of nuclear fuel found offsite, it indicates to me that the fuel racks were lifted up. The only thing that could cause that is something called a prompt moderated criticality…

Host: But that’s what happened at Chernobyl?

Gundersen: Yes, very similar.


Title: Arnold Gundersen with the latest on Fukushima: its effects on Japan, and the global risks posed by the No. 4 reactor
Source: If You Love This Planet Radio
Author: Dr. Helen Caldicott
Date: July 27, 2012

Filed under: Accident, Fukushima

Published: March 12th, 2011 at 4:31 am ET


Susanne Gerber

„Smoke was seen billowing from the Fukushima No. 1 atomic plant after what appeared to be an explosion.“

Al Jazeera

Filed under: Accident, Fukushima

Information about Reactor 3?


Susanne Gerber

TEPCO is sending 11 TEPCO employees and one robot (Survey Runner, which looks like a smaller version of Quince and has already gone inside Reactor 2’s Torus Room in April this year – photo, video) down to the basement of Reactor 3 to survey the inside of the Torus Room. Planned radiation exposure for the human workers is 8 millisieverts. No information of how long each worker will have to stay there to assist their robot co-worker. They won’t go inside the Torus Room, as the very high radiation levels are expected inside. Instead, Survey Runner will go. The human workers will carry the robot through the narrow passage in the basement to the Torus Room door, which they will open for the robot. 8 millisieverts of radiation exposure. Before the Fukushima accident, it was rare even for the nuclear plant workers to get 1 millisievert exposure in one year. Now, the workers may get 8 years‘ worth of radiation in a day’s work at Fukushima I Nuke Plant. When the workers tried to enter the Reactor 3 Torus Room in March this year, the access door was warped and didn’t open. The workers didn’t stick around to open the door, because the radiation levels were probably too high for the work (it was 75 millisieverts/hour in front of the door). TEPCO sent workers again in June to measure the water level in the basement.
The following will be done in the Torus Room in Unit 3 Reactor Building basement.
-Visual confirmation (Acquire photos and moving images)
-Dose rate measurement
-Collect sound samples in the Torus Room
Equipments: Remote control robot (Survey runner)
Members involved: 11 TEPCO employees
Investigation date: Wednesday, July 11, 2012
Planned expose dose
8 millisievert: 6 Carrying the robot through the triangle corner, opening doors
2 millisievert: 5 Robot operation, preparation

*Robot operation control is done in Unit 3 S/B (0.1mSv/h)

Filed under: Accident, Fukushima, Radiation, Research

TEPCO again fails to find leaks at Fukushima plant


Susanne Gerber

The operator of the Fukushima Daiichi nuclear power plant says a new method has failed to locate radioactive water leaking from one of the reactors. Identifying the leaks is a key step towards decommissioning the plant. Tokyo Electric Power Company said workers used an infrared camera on Tuesday to search for the leaks in the suppression chamber at the No.2 reactor. It was hoped that the infrared images would reveal the leakage spots by showing the temperature difference between the water and the air. But the images failed to show a big gap in temperatures. TEPCO says it will devise other ways to find the locations. The utility has been injecting water into the reactor to cool melted fuel rods to prepare for their removal. But some of the radioactive water is leaking from unidentified places.

Filed under: Accident, Consequences, Fukushima, Radiation

Photos of Reactor 4 Fukushima


Susanne Gerber

Reactor 4 lost most of the wall on sea side

Reactor 4 lost most of the wall on sea side2

Filed under: Accident, Fukushima

Tepco estimates total cesium-137 release from Fukushima at 360,000 terabecquerels — 4 times higher than Chernobyl’s 85,000 terabecquerels


Susanne Gerber

Tokyo Electric Power Co. has estimated the total amount of radioactive substances discharged from its Fukushima No. 1 nuclear power plant measured 760,000 terabecquerels, 1.6 times the estimate released by the Economy, Trade and Industry Ministry’s Nuclear and Industrial Safety Agency in February. One terabecquerel is equal to 1 trillion becquerels. TEPCO will include the estimate in a final report to be compiled by an in-house accident investigation committee in June. The firm has also begun explaining how it arrived at the figure to local governments in Fukushima Prefecture. There are two ways to estimate the amount of discharged radioactive substances. One way is to base calculations on the degree of damage to the reactor core. The other is to reverse calculate based on the density of radioactive substances found in the atmosphere and seawater. As a result, there will be differences in estimates depending on how the figures were obtained. NISA released an estimate of 770,000 terabecquerels in June last year, and another estimate of 480,000 terabecquerels in February. The Cabinet Office’s Nuclear Safety Commission released an estimate of 570,000 terabecquerels in August last year. TEPCO combined the two methods and repeated its calculations under different conditions.

It reached a final estimate of 400,000 terabecquerels of iodine-131 and 360,000 terabecquerels of cesium-137. The amount of cesium 137 was 85,000 terabecquerels in the Chernobyl accident.



Filed under: Accident, Consequences, Fukushima, Radiation

A Medium Sized ‚Nuclear War‘


Susanne Gerber

On the website of the Department of Nuclear Engineering at University of Berkley i found this anonymous posting from 2012/3/11

„More synthetic radio-nuclides have entered the global biosphere from Fukushima than from all other nuclear ‚accidents‘ and atmospheric atomic detonations combined; the ionizing radiation levels from Fukushima could more accurately be compared to that from a medium sized ’nuclear war‘. That nuclear weapons are described in terms of ‚mega-tons‘ instead of ‚mega-Curies‘ is part of the massive on-going deception surrounding all-things-nuclear since the days of Eisenhower and the AEC’s ‚peaceful atom‘ propaganda campaign. All honest scientists, including Nobel laureate Linus Pauling, knew from day one that ionizing radiation is the ultimate biological weapon, and this is how these susbstances are being used today. ONE spent fuel rod from even a non-MOX reactor contains more than enough plutonium to kill every human being on Earth. Tens or hundreds of thousands of these BURNED UP within a few days of Fukushima’s onset last March.“

Filed under: Accident, Consequences, Fukushima

Video Inside the Equipment Hatch Shield Plug of Reactor 3 at Fukushima I Nuke Plant


Susanne Gerber

See video here

I have no idea what I am seeing here. It is supposed to be mostly the image of inside the shield plug on the Containment Vessel of Reactor 3, which TEPCO finally admitted it had been open. The camera is sometimes upside down or sideways, but we cannot complain much to the camera crew (TEPCO employees) who received 8 millisievert radiation for their 4-minute work. Radiation looks to be much higher inside the shield plug.

Last November, a Packbot was sent to wipe off the guide rails for the shield plug. The robot was finding the radiation levels to be extremely high along the rails, with the highest at 1.6 sievert/hour.

Filed under: Accident, Danger, Fukushima, Radiation

Reactor 4


Susanne Gerber

  • Wall of the south side is falling apart at reactor 4
  • Assumed that if another aftershock hits it to drop the spent fuel pool hung in the building the entire area in eastern Japan would be too contaminated to be habitat
  • It was confirmed that the wall of reactor 4 was lost on the south side
  • At least since 12/5/2011, the wall is missing


Filed under: Accident, Danger, Fukushima