Abstract:
To find a better way to control the leakage characteristics of the reactor containment static sealing structure, the present work proposed a new leakage rate prediction model. In this model, the micro-mechanism of the static sealing is described based on the porous media seepage theory, and Hertz contact theory was applied to solve the change of the interface microscopic structure with the interface stress. Finally, the leakage rate can be calculated independently with any experimental data. The new model was applied to predict the leakage rate of a DN20 shut-off valve. Good agreement between the predicted outcomes and test data verified the validity of model.
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