Summary of Decommissioning and Contaminated Water Management

Main works and steps for decommissioning

Fuel removal from Unit 4 SFP had been completed and preparatory works to remove fuel from Unit 1-3 SFP and fuel debris (Note 1) removal are ongoing.

Toward fuel removal from pool

Installation of a cover for fuel removal at Unit 3
Installation of the west-side stopper (February 7, 2017)

Three principles behind contaminated water countermeasures

Countermeasures for contaminated water are implemented in accordance with the following three principles:

1. Eliminate contamination sources

2. Isolate water from contamination

3. Prevent leakage of contaminated water

Multi-nuclide removal equipment (ALPS), etc.

High-performance multi-nuclide removal equipment

Land-side impermeable walls

Opening/closure of frozen pipes

Sea-side impermeable walls

   Sea-side impermeable walls