| 摘要 |
PROBLEM TO BE SOLVED: To restrain the water stored in a spent fuel pool from flowing down below an operation floor. SOLUTION: A reactor building includes a bank 4 surrounding the spent fuel pool 1 on the operation floor 12 communicating with an opening of the pool 1 where spent fuel is stored in the water. The bank 4 may also surround an upper opening 24 of a reactor, an equipment pool 7 and a rail pit 3 where a refueling machine runs. Moreover, the following measures may be taken: the formation of drain ditches 11 in the bank 4 to connect the inside and outside of it, the erection of a hand rail 8 with plates in the upper part of the bank 4 in such a way that the hand rail 8 extends along the bank 4 and the placement of a discharge channel 6 connecting the spent fuel pool 1 and the rail pit 3, a switching means with a water-tight structure for openings 9 of the operation floor 12 outside the bank 4 and walls surrounding the operation floor 12 and a sealing means for floor drainage pipes 10 laid on the operation floor 12. COPYRIGHT: (C)2007,JPO&INPIT
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