LEAK DETECTION SYSTEM AND METHOD OF LNG TANK

摘要

The present invention relates to an LNG tank leak detection system, and more specifically, to an LNG tank (10) leak detection system (100) having a first insulating film (11), a first insulator (12) assembled to be a unit block having a certain size, a second insulating film (13), a second insulator (14) assembled to be a unit block having a certain size, and an outer wall (15), which are successively laminated. The LNG tank leak detection system comprises a first leak detection band (110) arranged in a shape for wrapping each unit block formed as the first insulator (12) between the first insulator (12) and the second insulating film (13) by crossing the unit block; a first leak detection sensor (120) which detects the change in tension or breaking of the first leak detection band (110); a second leak detection band (130) arranged in a shape for wrapping each unit block forming second insulator (14) between the second insulator (14) and the outer wall (15) by crossing the unit block; a second leak detection sensor (140) which detects the change in tension or breaking of the second leak detection band (130); and a leak detection panel (150) which outputs the detected location information when the change in tension or breaking of the first and second leak detection sensors (140, 150) is detected. According to the present invention, the LNG tank leak detection system can accurately detect the location of LNG leak at the insulating film of an LNG tank without detecting the leak location with a gas detector by injecting a tracer gas while the tank is being emptied after being moved to a shipyard for repair, thereby greatly saving time and costs required for detecting the leak location.