TEPCO did another event for the selected press to come see certain parts of Fukushima Daiichi. The tour appears to have focused on the failed ponds, the fuel removal building over unit 4 and the potential change to the cooling systems. The press was not allowed to freely inspect the plant.
TEPCO told the press they plan to use the condensate storage tanks, seaside tanks used as part of the original cooling systems. They will be used in some form as part of the upgraded reactor cooling loops. They did not elaborate clearly if these tanks would receive treated water from the radiation removal systems or if the water pumped out of the reactor buildings would go straight to these storage tanks to be reused. If it is reused the radiation levels within the system would likely become quite high. This situation would also lower the amount of water filtration needed and highly radioactive filters that would need to be handled and stored. The Asahi Shimbun report hints that they may recirculate the contaminated water but is a bit vague. We will update if we obtain a better explanation out of TEPCO.
At least some of the press seemed less than impressed with TEPCO’s press event and pointed out that TEPCO still has no idea where the melted fuel is located within the reactors. This is critical to controlling the leaking, for any work that could impact future attempts to remove the fuel and tear down the reactor buildings.
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