沈光耀,张晓春,朱加雷,等.核电站乏燃料水池水下ACFM焊缝缺陷检测系统研究[J].精密成形工程,2025,17(1):223-231.
SHEN Guangyao,ZHANG Xiaochun,ZHU Jialei,et al.Underwater ACFM Weld Defect Detection System for Spent Fuel Pool in Nuclear Power Plant[J].Journal of Netshape Forming Engineering,2025,17(1):223-231. |
| 核电站乏燃料水池水下ACFM焊缝缺陷检测系统研究 |
| Underwater ACFM Weld Defect Detection System for Spent Fuel Pool in Nuclear Power Plant |
| 投稿时间：2024-05-29 |
| DOI：10.3969/j.issn.1674-6457.2025.01.024 |
| 中文关键词: 乏燃料水池 S32101 水下缺陷检测 交流电磁场检测 试验 |
| 英文关键词: spent fuel pool S32101 underwater defect detection alternating current field measurement test |
| 基金项目:国家电力投资集团有限公司B类科研课题(KY-B1-2020-HN-10) |
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| 中文摘要: |
| 目的 针对核电站乏燃料水池钢覆面焊缝缺陷的水下检测需求，开发一种基于交流电磁场检测(ACFM)技术的水下缺陷检测系统，以检测和识别焊缝中的微小漏点，进而确保乏燃料水池的结构完整性和运行安全。方法 采用有限元模拟结合实验验证的研究方法。首先，采用三代核电乏燃料水池钢覆面的主要材料S32101双向不锈钢作为研究对象，利用COMSOL Multiphysics软件建立ACFM的缺陷检测模型，并对激励频率、激励电流进行优化分析。其次，研制了适用于核电水下环境的ACFM缺陷检测设备，并通过水压、电磁干扰、辐照试验来验证设备的可靠性。结果 当激励频率为1~5 kHz并采用较大的激励电流时，可以获得最佳的检测效果;试验结果表明，系统在辐照水下环境中具有良好的适用性，能够有效检测并识别出直径为0.1 mm的微孔贯穿缺陷及3 mm´ 0.2 mm´0.5 mm的浅表缺陷。结论 综合仿真分析、设备研制和实验验证的结果可知，所开发的水下ACFM缺陷检测系统能够满足核电站乏燃料水池钢覆面焊缝缺陷的水下检测需求，为核设施水下缺陷的早期预警和漏点判定提供了有效的技术手段。 |
| 英文摘要: |
| The work aims to develop an underwater defect detection system based on alternating current electromagnetic field detection (ACFM) technology for the underwater detection of weld defects on the steel cladding of spent fuel pools in nuclear power plants, to detect and identify tiny leaks in the weld, so as to ensure the structural integrity and safe operation of spent fuel pools. Finite element simulation and experimental verification were combined. Firstly, the main material S32101 duplex stainless steel of the third generation nuclear power spent fuel pool steel cladding was used as the research object. A defect detection model of ACFM was established by COMSOL Multiphysics, and the excitation frequency and excitation current were optimized and analyzed. Subsequently, an ACFM defect detection equipment suitable for nuclear power plant underwater environment was developed, and the reliability of the equipment was verified by water pressure, electromagnetic interference and irradiation tests. The results showed that the best detection effect could be obtained when the excitation rate was set between 1 kHz and 5 kHz and the excitation current was large. The experimental results showed that the system had good applicability in the irradiated underwater environment, and could effectively detect and identify the micro-hole penetration defects with a diameter of 0.1 mm and the superficial defects of 3 mm´0.2 mm´0.5 mm. Based on the results of comprehensive simulation analysis, equipment development and experimental verification, the developed underwater ACFM defect detection system can meet the underwater detection requirements of steel cladding weld defects in spent fuel pool of nuclear power plant, and provide effective technical means for early warning and leakage point determination of underwater defects in nuclear facilities. |
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