LIU Changjun1
LIU Pan2
WANG Dasheng2
LI Yue1
ZHANG Ruikai1
WANG Long2
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The ligament of perforated head of reactor pressure vessel head is prone to defects due to the complexity of its structure and load. In order to ensure the structural integrity of reactor pressure vessel during its service life, safety evaluation of defective parts needs to be carried out, in which the stress intensity factor is a key parameter required for evaluation. The finite element method was adopted to calculate the stress intensity factors of semi-circular cracks in the ligament of perforated head of reactor pressure vessel under pressure loading and thermal loading, respectively. The finite element results were compared with the influence function method proposed by Chapuliot. The results show that if the crack depths are small, the Chapuliot method can be conservatively used to calculate stress intensity factors. As the crack depths are larger than 0. 2 times of head thickness, the Chapuliot method is no longer suitable. In order to obtain a more accurate engineering calculation method for the stress intensity factors of cracks in the ligament of perforated head, based on the finite element solutions and the influence function method in the RSE-M standard, the influence coefficients of the central points and the surface points of the semi-circular cracks with different sizes are fitted under pressure loading and thermal loading.
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Basic Information:
DOI：10.20190/j.cnki.02580918.202602004
China Classification Code:TL351.6;TM623
Citation Information:
[1]ZENG Xin,LIU Fangwei,TAN Jianping ,et al.Calculation of Stress Intensity Factor Method in the Ligament of Perforated Head of Reactor Pressure Vessel[J].Nuclear Science and Engineering,2026,46(02):265-273.DOI:10.20190/j.cnki.02580918.202602004.
Fund Information:
国家自然科学基金资助项目（No.12572088,No.52075174）
2026-04-15
2026-04-15