| 摘要 |
PROBLEM TO BE SOLVED: To provide an annular nuclear fuel rod which enables regulation of the heat flow speed of internal and external cladding tubes, through a combination of internal and external annular sintered compacts. SOLUTION: The annular nuclear fuel rod includes the external cladding tube, the internal cladding tube which is located coaxially with the external cladding tube and keeps a diameter smaller than that of the external cladding tube, internal annular sintered compacts which are inserted between the external and internal cladding tubes so that they adjoin the side of the internal cladding tube and external annular sintered compacts which are inserted between the external and internal cladding tubes so that they adjoin the side of the external cladding tube and is constituted by forming a central interstice between the internal and external annular sintered compacts. The present invention resolves the imbalance in the heat flow speed possessed by conventional annular nuclear fuel rods, enables regulation of the heat flow speed of the internal and external cladding tubes, and promotes the safety of the annular nuclear fuel rod. COPYRIGHT: (C)2007,JPO&INPIT
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