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FU Qiang, LUO Ying, YANG Min, LIU Chuan. Three-dimensional numerical simulation on welding residual stress in weld between RPV head and CRDM nozzle[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(11): 105-108.
Citation: FU Qiang, LUO Ying, YANG Min, LIU Chuan. Three-dimensional numerical simulation on welding residual stress in weld between RPV head and CRDM nozzle[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(11): 105-108.
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Three-dimensional numerical simulation on welding residual stress in weld between RPV head and CRDM nozzle

  • 1.

    Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610041, China

  • 2.

    Provincial Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, China

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  • Received Date: February 19, 2014
    Graphical Abstract
    • Abstract
  • A mock-up of control rod drive mechanism (CRDM) nozzle on the reactor pressure vessel (RPV) head was manufactured with J-type groove. The temperature during welding and the residual stress were measured. The segmented temperature heat source model and the thermal-mechanical coupling method were adopted to efficiently simulate the welding temperature field and residual stress field, and the simulated results were compared with the experimental ones. Based on the simulated results, the residual stress distribution characteristic in the J-weld was analyzed. The investigated results show that the proposed model and the simulation procedure can efficiently obtain the residual stress field in the J-weld between RPV head and the CRDM nozzle, the simulated results generally agree with the measured ones; the longitudinal stress in the J-weld is greater than the axial stress. The stresses on the outer and inner wall of the nozzle are non-uniform. In addition, the stresses in the weld and the nozzle at the up-hill and down-hill regions are larger than those at the side-hill region.
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    • References (9)
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