GAO Yongjian HE Yinbiao CAO Ming SHEN Rui TAO Hongxin. Stress analysis and assessment of RPV core support pads and surround bottom head[J]. Nuclear techniques, 2013, 36(4): 040659
GAO Yongjian HE Yinbiao CAO Ming SHEN Rui TAO Hongxin. Stress analysis and assessment of RPV core support pads and surround bottom head[J]. Nuclear techniques, 2013, 36(4): 040659 DOI: 10.11889/j.0253-3219.2013.hjs.36.040659.
Background: The core support pads were used to limit circumferential rotation of core barrel
and the structure integrity of the core support pads was an important factor to the safe operation of nuclear power plant.Purpose: To ensure the structure integrity of the core support pads.Methods: Three-dimensional FEA model for bottom head
core support pads and part cylinder of CAP1000 RPV was established.Thermal analysis
static analysis
fatigue analysis and fracture analysis were performed.The analysis results were evaluated according to ASME B&PVC-III-NB-3200 and ASME B&PVC-III-1-Appendix G.Results: The evaluation indicated that the core support pads and surround bottom head could satisfy related requirements of above code.Conclusions: The analysis methodology used in this paper could also be applied to the core support pads of RPV for above 1000 MW nuclear power plant.