System performance test of mechanical decladding system for FBR fuel reprocessing

Koizumi, Kenji ; Washiya, Tadahiro ; Aose, Shinichi

JNC has been developing the mechanical decladding system for FBR oxide fuel. The mechanical decladding system is consists of the fuel pin crushing step(mechanical crusher), the hull separation step(magnetic separator) and the hull rinsing step(melting separator). The system mock-up test device is fabricated, and the system performance tests are carried out with simulated oxide fuel pins. As the results, the basic performance of each device and system performance were confirmed. The longevity of the crushing blades of mechanical crusher is one year or more and practical use. The majority of wrapping wire can be separated by the vibration classifier. High fuel purity and a high fuel separation efficiency are obtained by the multi-stage magnetic separator. An efficient fuel recovery is possible according to the CCLM technology. In the future, the positive proof data that uses the spent fuel will be obtained, and the design for the remote maintenance will be verified.