Patent ID: 7353691
Filing Date: 2008-04-08
Classification: G01M

Abstract:
1. A method of measuring hydrogen leakage from a generator core into generator coolant water flowing through the generator stator windings comprising the steps of: providing a core hydrogen gas environment within the generator; flowing coolant water in a flowpath through the generator stator windings and a conduit to a coolant water reservoir; flowing air at a rate of less than 0.15 CFM into said conduit and the coolant water after the coolant water exits the stator windings; measuring the quantity of air flowing into said conduit and into the coolant water; venting gas through a vent line from a contained vapor space over the coolant water within said coolant water reservoir; and measuring the hydrogen content of the gas vented from the reservoir; wherein flowing air at a rate of less than 0.15 CFM enables hydrogen leakage from the generator core environment through the stator windings into the generator coolant water to be determined in amounts down to about 0.2 CFD.