Issue Number:FDR-215
Phase: Design
Decommissioning Process Fuel Debris Retrieval
Investigation Subject Strategy and risk
Issue Establishing and operating comprehensive risk management policy

Needs

① Conducting comprehensive risk management
Time Axis: Fuel Debris Retrieval [Short-Term]

Desired state and reasons for it

To ensure safe fuel debris retrieval, it is desirable to systematically formulate a basic risk management concept in decommissioning of the damaged reactors.
It is desirable to systematically organize the potential risks in decommissioning of the damaged reactors.
It is desirable to introduce an efficient and effective risk management method, based on the above.

Gap between ideal and current state/Issues to be resolved

Risks involving a series of decommissioning work, including fuel debris retrieval, should be identified and organized without omission. This is important to comprehensively address the risks of combustion/explosion, degradation, exposure, and dissipation/migration in the handling of fuel debris and other materials. These risks need to include both those from carrying out the work those from not carrying out the work.
It should be noted that the risk level may increase over time due to deterioration of facilities or risk sources. In addition, the risk level may temporarily increase when risk reduction measures are implemented. It is necessary to take measures to ensure that the risk level does not reach an unacceptable level by making careful preparations, by establishing a thorough management system, and by continuously advancing the system, based on an integrated evaluation of these measures.

Relevant Issues

References

Please note that this English text is a provisional translation of the Japanese original.