Background: When upgrading the reactor power to promote the power efficiency of nuclear power plants

the BWR steam dryer is easier to be damaged by high cycle pulsating pressure

which is called acoustic fatigue problem.Purpose: An acoustic fatigue experimental schemes in steam generators is designed to study the acoustic load on the steam dryer.Methods: The acoustical computational software ACTRAN has been applied to simulate the acoustic pressure distribution inside scaled model of the upper chamber of steam generators.Results: Sound pressure level contour distributions at different frequencies are predicted.Conclusions: Sound pressure level contour distribution at mid-frequency is heterogeneous which is different with the low frequency one.