首页>
外国专利>
Key member and its applications for insertion or removal of fuel rods and disassembling of nuclear fuel assembly
Key member and its applications for insertion or removal of fuel rods and disassembling of nuclear fuel assembly
展开▼
机译:关键部件及其在燃料棒的插入或拆卸以及核燃料组件的拆卸中的应用
展开▼
页面导航
摘要
著录项
相似文献
摘要
A key member, a method for insertion and/or removal of the fuel rods in a nuclear fuel assembly using the key member and a method of disassembling the nuclear fuel assembly using the same key member are disclosed. The key member has first projections and second projections formed on the opposite faces of an elongated key body. In the insertion or removal of the fuel rods or in the disassembling the nuclear fuel assembly, the key member is inserted into the grid and rotated to bring the first projections and the second projections into engagement with the straps of the grids and the springs on the straps to thereby the springs are deflected in a direction away from the dimples opposing to the springs. In this situation, the insertion and removal of the fuel rods can be carried out. Further, in disassembling the nuclear fuel assembly, space required for inserting the key member into the grids may be ensured by subjecting prescribed portions of control rod-guide pipes and instrumentation pipes to cutting work and bulging the cut ends to move the cut end away from that of the opposing cut ends of the cut piece. The space may be formed by removing the control rod-guide pipes and instrumentation pipes after having formed slits in the pipes.
展开▼