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第 42 卷 第 6 期                                                                       Vol. 42, No. 6
             2023 年 11 月                         Journal of Applied Acoustics                 November, 2023

             ⋄ 研究报告 ⋄



              核电堆内构件围板螺栓超声检测优化有限元仿真研究                                                                    ∗




                  刘登荣     1   刘天浩      1   裴翠祥      1†  蔡文路      1    汤建帮     2    马官兵     2   吴宇坤      2


                                                 (1 西安交通大学     西安   710049)
                                             (2 中广核检测技术有限公司        苏州   215026)

                摘要：围板螺栓是核电堆内构件的关键紧固部件，典型的围板螺栓主要为外六角形式。在长期辐照和震动等
                恶劣环境服役过程中，其断裂韧性下降，脆性增加，最终导致螺栓退化开裂或断裂脱落，需要对其进行定期无
                损检测。然而由于其结构的复杂性，现有超声检测方法仍难以对其进行有效检测。为进一步提高超声检测方
                法对于围板螺栓内部缺陷的检测能力，针对堆内构件围板螺栓典型缺陷失效形式，通过有限元数值仿真技术
                开展适用于围板螺栓不同区域 (螺栓过渡区域、螺杆区域和螺纹区域) 的超声检测方法和工艺研究，对超声探
                头激励频率、晶片尺寸及超声波入射角度等进行优化，实现对不同区域 15% 缺陷横截面积占比的检测目标。
                为研发具有高度匹配性和高灵敏度的堆内构件围板螺栓超声传感器、实现对围板螺栓敏感区域的高精度检测
                提供理论指导。
                关键词：堆内构件；围板螺栓；超声检测；仿真优化
                中图法分类号: TG115.28           文献标识码: A          文章编号: 1000-310X(2023)06-1148-08
                DOI: 10.11684/j.issn.1000-310X.2023.06.005


                   Finite element simulation study on optimization of ultrasonic detection

                                for baffle bolts of nuclear power reactor internals


                               LIU Dengrong 1  LIU Tianhao 1   PEI Cuixiang 1  CAI Wenlu 1
                                     TANG Jianbang  2   MA Guanbing  2   WU Yukun  2

                                          (1 Xi’an Jiaotong University, Xi’an 710049, China)
                                   (2 CGNPC Inspection Technology Co., Ltd., Suzhou 215026, China)

                 Abstract: Baffle bolts are the key fastening elements of the internal components in the nuclear power
                 reactor internals, and the typical baffle bolts are mainly in the form of external hexagon. In the process of
                 service in harsh environments such as long-term irradiation and vibration, its fracture toughness decreases
                 and its brittleness increases.  Eventually, the bolt degenerates and cracks or breaks off, which requires
                 regular non-destructive testing. However, due to the complexity of its structure, it is still difficult for existing
                 ultrasonic testing methods to effectively detect it. In order to further improve the detection ability of ultrasonic
                 detection methods for internal defects of baffle bolts, this study aims at the typical defect failure forms of baffle
                 bolts of reactor internal components, and carries out ultrasonic detection methods and process studies suitable
                 for different areas of baffle bolts (bolt transition area, screw area and thread area) through finite element nu-
                 merical simulation technology. The ultrasonic probe excitation frequency, element size and ultrasonic incidence


             2022-06-25 收稿; 2022-08-08 定稿
             国家重点研发计划项目 (2020YFB1901502)
             ∗
             作者简介: 刘登荣 (1999– ), 男, 四川巴中人, 硕士研究生, 研究方向: 结构无损检测与评价。
             † 通信作者 E-mail: pei.cx@mail.xjtu.edu.cn
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