Patent ID: 11959593
Assignee: GAZTRANSPORT ET TECHNIGAZ
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 4:
5. The detection method as claimed in claim 4, the secondary insulation space having at least one injection duct arranged to inject the inert gas and at least one extraction duct arranged to extract the inert gas, and wherein the detection method also comprises the following steps: determining a third variation of mass of inert gas in the secondary insulation space between the first moment and the second moment, the third variation corresponding to the resultant of the total masses of inert gas added by the injection duct and removed by the extraction duct between the first moment and the second moment; determining a third mass of inert gas in the secondary insulation space at the first moment, and a fourth mass of inert gas in the secondary insulation space at the second moment by means for measuring the pressure and temperature in a free volume of the secondary insulation space; calculating a fourth variation of mass of inert gas in the secondary insulation space between the first moment and the second moment corresponding to the difference between the fourth mass and the third mass of inert gas; and comparing the third variation of mass of inert gas with the fourth variation of mass of inert gas, and triggering an alarm if a difference between the third variation and the fourth variation of mass of inert gas is greater than a second threshold.