TEPCO plans to add seawater to the treated water, dilute it to a substandard concentration, and then discharge it into the sea from a point about 40 km offshore through a tunnel dug into the seabed. IAEA = International Atomic Energy Agency, which evaluates the safety, is expected to publish the results of a comprehensive assessment as early as this month.

TEPCO aims to complete the construction of the facilities and pre-use inspections by the Nuclear Regulation Authority by the end of the month.