Vedentason mittausjärjestelmä ja tiivistymättömän kaasun poistolaite sitä varten

摘要

A water level measuring system (10) has: a riser piping section (3) connected to a plant device (20) and extending to above the plant device (20); an upper piping section (4) connected to the riser piping section (3); a connection piping section (5) having an upper end connected to the upper piping section (4) and extending downward; a lower instrumentation piping (2b) connected to the plant device (20); a water level gauge (1) provided with a first connection section (31) which is connected to the lower end of the connection piping section (5) and also with a second connection section (32) which is connected to the lower instrumentation piping (2b), the water level gauge (1) measuring the differential pressure between the first connection section (31) and the second connection section (32); a vent pipe (12) branched from the connection piping section (5); a control valve (11) installed in the vent pipe (12); and hydrogen concentration detectors (6) mounted to the riser piping section (3), the upper piping section (4), and the connection piping section (5).