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TEPCO’s plan for decommissioning Fukushima nuclear Unit 3

Chairman Allison Macfarlane and other NRC officials stand in the darkened interior of Reactor 4 at the Fukushima Dai-ichi nuclear complex northeast of Tokyo Dec. 13, 2012. Photo courtesy of TEPCOFukushima Unit 3 Decommissioning Plan Released, Simply Info,  July 8th, 2015 [Excellent graphs and photos] TEPCO released significant new information about the plan and progress for dealing with unit 3′s spent fuel pool. The report was buried among other documents related to periodic reporting and didn’t receive any press in Japan.

Radiation levels are a constant problem for this work effort. A significant portion of the planning has gone into ways to lower the radiation doses on the refueling floor even though work such as crane operations will be done remotely from another building. Damage to the building structure is another major challenge. The defueling building and any shielding must be designed to not further damage unstable portions of the building.

The defueling building will span over the existing remains of unit 3. Footings will run down to the ground on one side and to an accessory building on the other. Radiation levels are going to be a problem not just for any workers that might have to do some sort of hands on work but to equipment installed over time. High levels of radiation can damage electronics.

The actual defueling building has already been built. A dry run assembly was done in 2014 at the storage facility at Onahama Port near Fukushima Daiichi. The building now sits disassembled at the port waiting for installation on site………..http://www.fukuleaks.org/web/?p=14857

July 10, 2015 - Posted by | Fukushima 2015

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