Inspection and repair method and inspection and repair device for nuclear reactor jet pump

摘要

PPROBLEM TO BE SOLVED: To obtain a test and repair method and test and repair system of reactor jet pumps for conducting integrity confirming test and repair work of inner surface of whole jet pump including a riser pipe without removing an inlet mixer. PSOLUTION: A flexible cable 22 and a flexible sending rod 25 which is rotatably connected with the flexible cable 22 are combined with a tool head 21 loading a test and repair tool 35. When the inner surface of a diffuser 10 is tested or repaired, the flexible cable 22 and the sending rod 25 are extended almost linearly, and the tool head 21 is inserted in the diffuser 10. When the riser pipe 6 inside is tested and repaired, the flexible cable 22 and the sending rod 25 are folded to overlap and the tool head 21 is once inserted in the diffuser 10. Then the insertion direction of the sending rod 25 is reversed and the tool head 21 is inserted in the riser pipe 6. PCOPYRIGHT: (C)2007,JPO&INPIT