ISCN held a training course entitled “DCVD Training for Spent Fuel Verification” with the cooperation of Chubu Electric Power Company as part of the grant project by the Ministry of Education, Culture, Sports, Science and Technology (MEXT). Positioned as JASPAS (Japan Support Programme for Agency Safeguards) by the Japanese government, this training was aimed at inspectors from IAEA (International Atomic Energy Agency) and inspectors from NMCC (Nuclear Material Control Center).
The training was designed to provide the principle, structure, and operation procedure of DCVD (Digital Cherenkov Viewing Device) used to detect partial defects in spent fuel at nuclear power plants. This DCVD training has ever been running in Sweden for many years, but this was the first time in Japan.
In this training, twelve participants were divided into three groups of four each for a two-day program. On the first day, each group received lectures on the principle and structure of DCVD and practiced how to operate the device in the lecture room. On the second day, the participants in each group conducted exercises on measuring spent fuel in the spent fuel pool. The practical session was designed to show importance of correct alignment over the assemblies and optimizing the measurement parameters. The effect of different cooling times and burn-ups was demonstrated.
The participants are expected to take a major role in conducting appropriate and effective inspection work at the Fukushima No.1 nuclear power station using DCVD for the future.