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Contaminated water management

We are creating multi-layered countermeasures based on the following 3 basic principles pertaining to countermeasures for contaminated water at Fukushima Daiichi NPS

  1. “Remove” contamination source
  2. “Isolate” water from contamination
  3. “Prevent leakage” of contaminated water

As we move forward with preventive and multi-layered contaminated water countermeasures based on the principles described above we can expect results, but they require confirmation and verification to be used, and the following technical verifications were conducted.

<Equipment servicing verification (Countermeasures to Manage Contaminated Water)>

  • Large-scale verification of impermeable walls (“Ice Wall”) [Prevent leakage]
  • High-performance Advanced Liquid Processing System (High-performance ALPS) equipment verification [Remove]

<Technology verification (Countermeasures for Decommissioning and Contaminated Water Treatment)>

  • Tritium separation [Remove]
  • Seawater purification [Remove]
  • Collection of radioactive materials from soil [Remove]
  • Tank decontamination [Prevent leakage]
  • Unmanned boring technology [Other]

R&D efforts

Demonstration of the process control technology of contaminated water

Plant investigation, measurement data, and information

Contaminated water related data
Current Status of Fukushima Daiichi NPS 
Results of water quality analysis  
  • Overall
  • Building periphery (sub-drains, etc.)
  • Groundwater bypass
  • Harbor & sea region
Stagnant water status  
Tank status