Sealing design optimization of nuclear pressure relief valves based on the polynomial chaos expansion surrogate model

Zong Chaoyong; Shi Maolin; Li Qingye; Xue Tianhang; Song Xueguan; Li Xiaofeng; Chen Dianjing

doi:10.1016/j.net.2022.12.013

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자료유형: 학술저널

저자정보: Zong Chaoyong (Dalian University of Technology) Shi Maolin (Jiangsu University) Li Qingye (Dalian University of Technology) Xue Tianhang (Dalian University of Technology) Song Xueguan (Dalian University of Technology) Li Xiaofeng (National Engineering Research Center for Special Pump and Valve) Chen Dianjing (National Engineering Research Center for Special Pump and Valve)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제4호

발행연도: 2023.4

수록면: 1,382 - 1,399 (18page)

DOI: 10.1016/j.net.2022.12.013

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Pressure relief valve (PRV) is one of the important control valves used in nuclear power plants, and its sealing performance is crucial to ensure the safety and function of the entire pressure system. For the sealing performance improving purpose, an explicit function that accounts for all design parameters and can accurately describe the relationship between the multi-design parameters and the seal performance is essential, which is also the challenge of the valve seal design and/or optimization work. On this basis, a surrogate model-based design optimization is carried out in this paper. To obtain the basic data required by the surrogate model, both the Finite Element Model (FEM) and the Computational Fluid Dynamics (CFD) based numerical models were successively established, and thereby both the contact stresses of valve static sealing and dynamic impact (between valve disk and nozzle) could be predicted. With these basic data, the polynomial chaos expansion (PCE) surrogate model which can not only be used for inputs-outputs relationship construction, but also produce the sensitivity of different design parameters were developed. Based on the PCE surrogate model, a new design scheme was obtained after optimization, in which the valve sealing stress is increased by 24.42% while keeping the maximum impact stress lower than 90% of the material allowable stress. The result confirms the ability and feasibility of the method proposed in this paper, and should also be suitable for performance design optimizations of control valves with similar structures.

#Valve sealing #Design optimization #Polynomial chaos expansion #Disk impact #Pressure relief valve

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