Radiological Impact Assessment Regarding the Discharge of ALPS Treated Water into the Sea (Design stage) at the Fukushima Daiichi Nuclear Power Station
November 17, 2021
Tokyo Electric Power Company Holdings Inc.
Following the cabinet approval of the Japanese Government’s Basic Policy on Handling of ALPS Treated Water at the Tokyo Electric Power Company Holdings’ Fukushima Daiichi Nuclear Power Station in April 2021, TEPCO has been reviewing the details of the design and operation of facilities for securing safety to thoroughly implement measures to minimize adverse impacts on reputation. We then presented the status of review of the details of design and operation of facilities in August of this year.
We have conducted a radiological impact assessment (design stage) on the public and the environment regarding the discharge of ALPS treated water into the sea using the assessment methodology developed in accordance with internationally recognized methods. Results have been summarized in the attachments below.
The assessment found that effects of the discharge of ALPS treated water into the sea on the public and the environment is minimal as calculated doses were significantly less than the dose limits, dose targets, and the values specified by international organizations for each species.
TEPCO will widely receive and gather public comments to further improve the report. Going forward, we will implement necessary procedures to receive approval for the implementation plan from the Nuclear Regulation Authority, and revise the assessment following reviews by IAEA experts and upon receiving opinions and reviews from various other parties.
TEPCO will continue to provide scientific information about the radiological impact on the public and the environment in a transparent manner in order to dispel concerns and foster understanding among people in Japan and overseas.