| abstract |
Provided are a leakage inspection apparatus and a leakage inspection method for inspecting the flow rate of leakage from a tested body disposed in a tested-body chamber 21 . The leakage inspection apparatus includes liquid supplying and pressurizing means 11 for supplying a probe liquid to the inside of the tested-body chamber 21 and pressurizing the probe liquid to a high pressure 0.1 MPa or more, vacuum evacuation means 22 - b, 23 - b and a quadrupole mass spectrometer 34 . The tested body 21 is evacuated, the probe liquid is supplied to the inside of the tested body and pressurized to 0.1 MPa or more and the concentration of a probe medium leaked from the tested body and evaporated in a vacuum is measured by the quadrupole mass spectrometer 34 , thereby measuring the flow rate of leakage from the tested body. This makes it possible to determine the flow rate of leakage using a liquid as a probe medium and simultaneously possible to perform a pressure tightness inspection at an atmospheric pressure of 0.1 MPa or more, especially at a high pressure ranging from 1 MPa to 1 GPa. |