Abstract
The valve assembly to use in nuclear power plant shall be qualified by ASME QME-1. The maximum differential pressure is required to be maintained throughout whole lifting to practical extent. But the limitation of the test facility leads to the reduction of the upper pressure below the maximum differential pressure. So the engineering evaluation on the pressure reduction is needed. In the present study, the flow analysis of valve assembly is performed using CFD. The flow coefficient is calculated using the differential pressure and flow rate. And using the upper pressure of the valve assembly, the differential pressure force, piston force, packing force, sealing force, and valve body/cage friction force are calculated. Finally the required force is obtained and compared to the real situation. The evaluation of each force can make explanation the difference between the real test and ideal environment. Finally, the maximum required force is occurred at the closing point and the real result of flow interruption and capacity with the reduced differential pressure has engineering meaning within small error, which can not change the previous real test result. It is confirmed that the CFD is useful tools to get the engineering view point.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
