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Fukushima Unit 2; New Containment Panorama Photos

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April 1, 2019

A pair of new panoramic photos from inside Fukushima unit 2’s containment have been published. TEPCO provided the photos as part of ongoing updates on the disaster decommissioning work. The photos were stitched together from earlier containment inspection work then processed to bring out details of the photos. Also included in this report is details about the radiation and temperature readings inside containment, we explain that later in this report.

To read more on Fukuleaks:

http://www.simplyinfo.org/?p=17075&fbclid=IwAR1_Q_39LzdqLkkBzP9qwYPhAUrvsnpwvdtngLB9iCkKr4o5UVKxP262Yz4

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April 8, 2019 Posted by | fukushima 2019 | , | Leave a comment

Fukushima Daiichi Unit 2 Newly Erected Platform’s Enigma

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A bird’s eye view of Units 1 and 2 from the hill

 

On December 15, 2016, the newly elected Kashiwazaki mayor, Mayor Masahiro Sakurai, who has called for a conditional restart of the Kashiwazaki-Kariwa nuclear power plant, one of the world’ largest nuclear plants, when he was elected mayor of this coastal city in Niigata Prefecture, northwestern Japan on Nov. 20, visited the Fukushima daiichi nuclear plant.

TEPCO, operator of the crippled Fukushima No. 1 nuclear plant, eager to restart reactors at the Kashiwazaki-Kariwa plant, invited him to tour the Fukushima Daiichi Nuclear plant, so as to show him that they fully control the situation there.

During the election campaign, Masahiro Sakurai said he would “approve a restart of the halted nuclear plant if safety is confirmed and certain conditions are fulfilled.”

One condition is the construction of a road that residents can use for evacuation in case of an emergency at the nuclear plant. Masahiro Sakurai also promised to start decommissioning older reactors at the plant.

Tepco made Mayor Sakurai visit the Fukushima Daiichi plant site, some of its buildings, its central control rooms 1 and 2, and the land side frozen by the impermeable ice wall.

On the same day, Tepco released 6 photos of Mayor Sakurai’s visit. One of the pictures was taken while Sakurai viewed  Units 1 and 2 from the hill, it shows a new platform erected by Tepco around unit 2. This new platform with extensive stairwells and levels running the length of the building, might be part of some work to remove the refueling floor so as to replace it with a defueling building.

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No information was yet provided by Tepco regarding that platform purpose.

Source : http://photo.tepco.co.jp/date/2016/201612-j/161215-01j.html

December 16, 2016 Posted by | Fukushima 2016 | , | Leave a comment

Containment Repair Research for Fukushima Unit 2 Ongoing

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IRID announced the details of the ongoing research for repairing the unit 2 suppression chamber.

Based on their previous investigations IRID has determined that there could be a hole or series of holes of around 50mm in the unit 2 suppression chamber.

The research work is to determine if filling with concrete that structure could work. The proposed plan would use a concrete pump truck with a 5 inch diameter flexible hose to inject concrete into the suppression chamber.

Initial work took place at the Ando Hazama Technical Research Institute (Tsukuba City, Ibaraki Prefecture) on October 15th.

It seems they succeeded in layering the concrete mixture,  sinking properly in the bottom of the suppression chamber tube. A 28 day pressure test will be conducted to assure the concrete properly plugs the leak.

Future work may be conducted at the new decommissioning research center at Naraha.

Source IRID :

http://irid.or.jp/topics/%e5%8e%9f%e5%ad%90%e7%82%89%e6%a0%bc%e7%b4%8d%e5%ae%b9%e5%99%a8%e6%bc%8f%e3%81%88%e3%81%84%e7%ae%87%e6%89%80%e3%81%ae%e8%a3%9c%e4%bf%ae%e6%8a%80%e8%a1%93%e3%81%ae%e9%96%8b%e7%99%ba%e3%80%80%e3%82%b5/

<添付資料11/1スケールS/C試験に関する現場状況・概要図>
http://irid.or.jp/wp-content/uploads/2016/10/20161018_001.pdf
<添付資料2:コンクリート打設進捗に伴う時経列事象・解説図>
http://irid.or.jp/wp-content/uploads/2016/10/20161018_002.pdf

October 21, 2016 Posted by | Fukushima 2016 | , , , , | Leave a comment