| 摘要 |
PURPOSE:To monitor continuously plural sampling points at the same time, by putting plural sampling pipings together in one piping through a header and introducing said piping into one sodium leakage detector. CONSTITUTION:The gas sampled from an annulus space 3 between a cooling system piping 1 and a heat insulating structure 2 by plural sampling piping 5 is collected by a header 7 provided on the downstream and said gas is introduced into a gas sampling type sodium leakage detector 11 and then, detection of sodium is carried out. A by-pass line 9 provided with a flow rate controlling valve 10 is provided in parallel to the detector 11 and it is controlled so as to satisfy measuring conditions of the detector 11 by controlling the flow rate. And, each piping 5 is provided with a flow rate controlling valve 6 and it is regulated so that the gas flow rate of each line is made uniform. Stop valves 4, 8 are provided as a valve for pressure proof test in order to confirm the soundness of the header 7 and the piping 5. |
