| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal mechanism of a double seal part, capable of maintaining good sealability even in any severe accident, and capable of easily applying to an existing plant even in a case where the existing plant is reinforced.SOLUTION: A seal mechanism of a double seal part A in an opening of a sealed container includes a flow channel 19 communicating with the double seal part A, and cooling fluid supply means 23 detachably connected to an inlet 19a of the flow channel 19 and supplying cooling fluid into the flow channel 19 at non-stationary time. |
