TEPCO completes Fukushima water storage upgrade

10 April 2019

TEPCO recently announced that water treated with multi-nuclide removal equipment (ALPS) has been completely transferred from flange-type tanks to new welded-type tanks at the Fukushima Daiichi Nuclear Power Station, concluding the job within the scheduled deadline of March 2019. The transfer, which reduces the risk of possible leaks from flange tanks, is another milestone in the government’s roadmap pointing to the decommissioning of the Fukushima Daiichi Nuclear Power Station.

Flange tanks were introduced initially for speed and efficiency. Over time, however, these tanks present some risk of leaking due to the gradual deterioration of their rubber gaskets, so in the interest of long-term safety, a TEPCO priority, the company decided to switch to welded tanks, which do not have seams or gaps.

TEPCO will continue to enhance the safety of its treated-water storage at the Fukushima Daiichi Nuclear Power Station to maximize environmental protection as well as safety during ongoing decommissioning and clean-up efforts.

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