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Friday, October 14, 2011

Fukushima Daiichi No. 1 enclosed

The enclosure for Fukushima Daiichi No. 1 is complete as of October 14, 2011. This was the first plant to suffer a hydrogen gas explosion with subsequent severe reactor building damage during the accident sequence.

Below, TEPCO press photo showing the final roof panel unit being lowered.

Below, TEPCO press photo showing the completed enclosure.

Here are some "before" photos.

Above, No. 1 reactor building as seen on May 24, 2011 with concrete pumper truck positioned alongside. During the entire effort to recover the plants, these concrete pumper trucks performed yeoman service in many areas, including spraying water on spent fuel pools, carrying cameras for observation, and carrying airborne contamination sampling equipment.

Above, TEPCO release showing laser imaging of the No. 1 plant. This is NOT a photograph; this image was obtained through the use of several laser imaging units, with the image results run through a computer program giving this image which appears to be a photo but which is actually a computer-generated 3D construct.


Above, TEPCO image showing CAD design for the completed reactor building enclosure. This image used the earlier 3D laser image data as a starting point; the structure was then designed and added to the image.

Above, a realistic computer generated view of the completed structure. Note the close conformity with the structure as actually completed October 14th. This image is also from June.

The plan was developed to construct major components at Onagawa which would then be shipped to the Fukushima Daiichi site by sea for assembly around the reactor building. Below, analytical work on how the assembly was to be built at the Fukushima Daiichi site resulted in this detailed illustration showing one of the very large construction cranes, with all elements to scale.

Finally, above, another view from about one month ago - September 10, 2011 - showing the framework of the structure well underway.

5:30 PM Eastern Friday October 14, 2011

1 comment:

  1. Any idea what the those two 'windows' are for on the north side? I spent about an hour watching one of the roof sections being lifted and set in place on TEPCO's live video feed. Interesting stuff.