Ultrasonic Measurement Technology and Application on 14-Foot Fuel Assembly Deformation
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摘要: 为了解辐照后燃料组件变形情况，对换料设计优化、调整装料步序提供辅助手段，本测量技术利用超声波测距及后期的图像处理技术，能够在反应堆卸料期间快速测量燃料组件变形，并绘制全堆芯燃料组件变形分布情况。测量结果表明，同一机组循环末全堆芯燃料组件变形情况趋于一致，外围组件在循环末均不同程度朝反应堆外侧变形。本技术可为换料设计优化提供依据，避免落棒试验风险以及外围燃料组件格架磨损。Abstract: In order to understand the deformation of the fuel assembly after irradiation and provide an auxiliary means for optimizing the refueling design and adjusting the loading sequence, this measurement technology can quickly measure the deformation of the fuel assembly during the reactor unloading and draw the deformation distribution of the whole core fuel assembly by using ultrasonic ranging and post-image processing technology. The measurement results show that the deformation of the whole core fuel assembly of the same unit tends to be consistent at the end of the cycle, and the peripheral assemblies are deformed to the outside of the reactor to varying degrees at the end of the cycle. This technology can provide a basis for the optimization of refueling design and avoid the risk of rod drop test and the wear of peripheral fuel assembly grid.
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Key words:
- Core /
- Fuel assembly /
- Deformation measurement /
- Reactor /
- Refueling
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图 3 燃料组件变形方向与堆芯方位对照图
Figure 3. Fuel Assembly Deformation Orientation versus Core Orientation
图 4 第一、二循环末全堆芯燃料弯曲变形测量结果
红色箭头表示堆芯出口方向
Figure 4. Deformation Results of Full Core Fuel Assemblies at the End of Cycles 1 and 2
图 5 全堆芯燃料组件循环末第5、6层格架变形情况
Figure 5. Deformation of Full Core Fuel Assemblies in Grids 5 and 6 at the End of Cycles 1 and 2
图 6 全堆芯燃料组件变形量大小示意图
图中圆面积大小代表核燃料组件变形量大小
Figure 6. Schematic Digram of Deformation Size of Full Core Fuel Assemblies
图 7 循环末外围燃料组件格架变形情况
Figure 7. Deformation of Fuel Assemblies Located in Periphery of Core
表 1 14英尺燃料组件管座及各层格架高度
Table 1. Grid Elevation of 14-Foot Fuel Assembly
管座/格架 高度/mm 上管座 35 格架1 166 格架2 674 格架3 1182 格架4 1690 格架5 2198 格架6 2706 格架7 3176 格架8 3646 格架9 4116 格架10 4586 下管座 4747 
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表 2 格架1、4、10测量距离
Table 2. Measuring Distance of Grids 1, 4 and 10
参数 格架1 格架4 格架10 测量距离/mm r=0° 103.2 102.5 102.1 r=180° 97.3 98 100.1
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表 3 组件A第一、二循环末变形量 mm
Table 3. Comparison of Assembly A Deformation at the End of Cycles 1 and 2
格架号 第一循环末 第二循环末 X方向 Y方向 X方向 Y方向 格架1 0 0 0 0 格架2 −1.6 −0.7 −0.4 −0.7 格架3 −3.5 −1.4 −0.8 −1 格架4 −4.2 −1.1 −0.1 −0.7 格架5 −4.2 −0.8 0.8 −0.5 格架6 −4 −1.8 1.2 −0.8 格架7 −4.1 −3.5 0.4 −1.2 格架8 −3.4 −4.3 −0.4 −1.4 格架9 −1.7 −2.8 −0.4 −1.2 格架10 0 0 0 0
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[1] 邓志新,王玲彬. 秦山第二核电厂燃料组件辐照变形测量、分析及对策研究[J]. 中国核电,2013, 6(4): 307-311. [2] 李伟才,肖忠. 压水堆燃料组件弯曲变形机理及规避措施[J]. 核动力工程,2008, 29(2): 55-57,73. [3] 王从政,胡松,冯常,等. 基于水下双目视觉的燃料组件变形检测系统[J]. 应用光学,2019, 40(2): 246-252. [4] 王克宽,段瑞彬,何亚章,等. 基于水下超声测距方法的海底管道屈曲变形测量技术研究[J]. 石油工程建设,2023, 49(6): 16-19. -
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