Fuel Debris Portal Site

The work schedule will be broken up into three phases. Currently, remotely operated robots are being used to perform internal investigations of the primary containment vessels. Since site radiation doses are relatively low, and the primary containment vessel can be accessed earlier than others, “Unit 2” has been selected as the first unit from which fuel debris shall be retrieved.

Robots will be used to perform investigations in order to obtain information about the inside of the primary containment vessels to deliberate retrieval methods.

Fuel debris will be retrieved on a trial basis and analyzed to ascertain its properties.
Dedicated retrieval devices shall be developed based on information obtained through the trial retrieval of fuel debris and primary containment vessel internal investigations, and the scope of fuel debris retrieval shall be gradually enlarged as we performed this series of tasks on a “step-by-step” basis.

The fuel debris retrieved after the scale of retrieval has been enlarged shall be stored inside sealed metal containers (storage containers) in order to shield and contain the radioactive substances after which they will be stored in an on-site storage facility.

After this is done we shall coordinate with the national government to determine how to dispose of the fuel debris while leveraging the information from investigations and R&D achievements.