| 摘要 |
PURPOSE:To detect automatically a leakage place by opening and closing automatic valves in order by a sodium leakage detecting signal, and detecting an output lowering of a detector. CONSTITUTION:Sampling gases sampled from sampling pipings A-D are introduced to a header 11 through the automatic valves 17. The gases sampled from respective pipings A-D are joined at the header 11, and introduced to a sodium leakage detector 7. If an output of the detector 7 exceeds a reference level, a timer 14 is functioned, and a valve driving circuit 13 is controlled so that an opening and closing valve 17 is opened and closed in order at several min intervals. The output level lowering of the detector 7 at that time is detected, and the valve driving circuit 13 is stopped. A position signal of the valve at the stopping time of the circuit 13 is recorded in a recorder 16. |
