Host: The Japan Society of Mechanical Engineers
Name : Proceedings of FDR2024 International Topical Workshop on Fukushima Decommissioning Research
Date : October 10, 2024 - October 13, 2024
Following the decommissioning process at Fukushima Daiichi Nuclear Power Plant (1F), various radioactive wastes have been generated. Moreover, as the recovery of fuel debris progresses, the waste containing nuclear material will also be generated. The existing wastes have been categorized based on material type and radiation levels, and are currently stored above ground. Similarly, recovered fuel debris is expected to undergo appropriate waste treatment and storage. And eventually, all of them are supposed to be disposed of stably and safely.
The disposal methods for radioactive waste generated from 1F will be selected based on previously considered in the nuclear sector, taking into account the social and economic factors relevant to the characteristics of each type of waste. Radioactive waste disposal does not simply end with the burial of the waste package; it also requires the long-term management of waste data even after the closure of the repository. Particularly, radioactive waste originating from 1F possesses different types, of radioactivity, etc. compared to typically generated from the nuclear sector, and it requires highly transparent and continuous information dissemination to society. Therefore, it is essential to establish proper management techniques for the traceability data concerning the diverse characteristics of the waste, looking ahead to the disposal of various types of waste.
In recent years, distributed ledger technology, in particular blockchain, has attracted attention as a management method for sensitive data such as nuclear materials in the nuclear sector. Blockchain is a distributed management method that encrypts blocked data and has advantages such as ensuring data verifiability and transparency, data integrity (against tampering), and redundancy due to the distributed retention of information. Therefore, we have developed a Blockchain-based knowledge management system (commonly known as NEUChain-F) for secure and robust traceability data management of the various radioactive wastes originating from 1F.
