TEPCO has been progressing with the preparation work for the eventual removal of the spent fuel from unit 2 at Fukushima Daiichi. New details of the fuel removal process have also been released.
Spent fuel removal is scheduled to begin in 2024 and be completed by 2026. Further decontamination work inside is underway as is work outside the building to remove debris and prepare the ground for the spent fuel removal building. The control room on the refueling floor is slated for removal to make way for the opening between the refueling floor and the new spent fuel removal building to be constructed.
Decontamination work on the refueling floor is underway. Starting in January 2022 shielding materials will be installed on the refueling floor.
Shielding appears to be slated to go along certain walls and over the reactor well area. The existing spent fuel crane will be moved over the reactor well to make room for the new fuel handling crane.
The floorplan (below) shows a tall shielding system to be installed around the spent fuel pool area, isolating it from the reactor well. This will act as a shielded access hallway for workers to enter the area. The floorplan also shows the spent fuel removal building where it will be installed adjacent to the spent fuel pool.
The shielding locations are shown in green in the diagram (below).
Ground foundation work is underway near unit 2 for the spent fuel removal building. This work is being done with remote equipment due to the radiation levels between units 2 and 3. The levels are still considered too hazardous for human workers a decade after the initial disaster.
A machine-translated version of the TEPCO report in English can be found here.
The original TEPCO report in Japanese can be found here.
All original images credit, TEPCO.
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