SEAL PLUG LEAKAGE DETECTOR FOR PRESSURE TUBE TYPE NUCLEAR REACTOR

摘要

PURPOSE:To detect the leakage from a seal in good response by filling liquid in the entire tube region from a seal plug leakage detecting end to a leakage detector. CONSTITUTION:Only a valve 18 of tubes 15, 16 drawn from a selector valve 14I is opened for the group I of the entire pressure tubes in a nuclear reactor to thus communicate the leakage detector 19I with the leakage detector II. The selector valve 14I is operated in this state to select separately the special seal plug in the group I. If leakage occurs in the respective seal plugs 2, the liquid level in a cylinder 20 is raised. After the measurement the excessive liquid in the leakage detector is exhausted to a drain 25 to thus again return to the standby state.