TEPCO submitted plans to the NRA for spent fuel removal from unit 3. This included more detail on how they intend to install a cover and remove transit casks from the building.
The defueling building cover bridges the original reactor building, putting the load on the existing scaffolding system and an accessory building.
This structure avoids contact with the reactor well, known to have high radiation levels. TEPCO did not mention any measures to prevent radiation issues from the fuel canal between the reactor and the spent fuel pool. They also do not mention anything about worker exposures or how human work would be conducted. Estimated radiation levels in the area are as high as 1 sievert/hour.
The fuel casks would be moved out of the pool to the left side as seen in the diagram. This would allow them to be lowered to an area near the original garage and …
Source: Fukushima Sub