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A III+ Generation Pressurizer Stress Analysis and Evaluation

[+] Author Affiliations
Gang Zheng, Feng Shen, Yi Peng

State Power Investment Corporation Central Research Institute, Beijing, China

Fang Wu, Jundong Wang, Lipei Chen

State Nuclear Power Demonstration Plant Co.LTD, Rongcheng City, China

Paper No. PVP2016-63415, pp. V003T03A038; 13 pages
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5039-8
  • Copyright © 2016 by ASME


A large scale pressurizer is used in III+ generation Nuclear Power Plant (NPP) which requires a high safety standard. The finite element method was adopted in this study to analyse and evaluate a III+ NPP pressurizer. A 2D integral symmetric model was created for the Upper Head, Lower Head and Shell which comprise the pressurizer. The typical Safety Relief Nozzle was selected to be representative of the nozzles in this analysis. A 3D local model was created for the Safety Relief Nozzle. The pressurizer was loaded under design condition to test its structure integrity and was further evaluated by American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME B&PVC) [1]. Furthermore, a model optimization method was proposed for the 3D nozzle model under ANSYS Workbench. The results showed that the pressurizer stress analysis fully met the ASME B&PVC criteria under design condition. The model optimization method was demonstrated to be valid and could be used for nozzle analysis and evaluation.

Copyright © 2016 by ASME



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