| 摘要 |
PURPOSE:To detect leakage quickly and easily with good accuracy by a method wherein the frame body of a detecting device is formed so as to be a lattice frame surrounding the ends of respective cooling tubes respectively and halogen detecting elements are incorporated into respective compartments through supporting tubes while an electric current is generated between the halogen detecting elements and the supporting tubes. CONSTITUTION:The frame body 21a of a detecting device 21 is formed so as to be a lattice frame, in which the partitioned compartments 21b surround the ends of respective cooling tubes when the frame body is applied to the outside of a tube plate and halogen detecting elements 18 are incorporated into respective compartments 21b through supporting tubes 19 while respective compartments 21b are connected to the outside of the titled device through lead wires 22. All of water chambers and the cooling tubes are kept in vacuum simultaneously and, thereafter, a predetermined amount of halogen gas is mixed into the steam side of a condenser in atmosphere. When there is leakage in the cooling tubes, the amount of an electric current conducted between an anode (halogen detecting element 18) and a cathode (supporting tube 19), which are in the compartment 21b at a position corresponding to the position of the leakage, is increased whereby the leakage is converted into an electric signal and is read at the outside of the titled device.
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