Design and Verification of Fuel Assembly Repair System
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摘要: 为充分利用辐照后燃料组件，结合其密集型和重量轻的特点，提出了一种燃料组件的修复工艺，设计了一套辐照后燃料组件修复系统，对关键零部件进行了详细设计并采用ANSYS软件进行抗震校核。结果表明，燃料组件修复系统主体框架应力和变形均满足要求；通过工程试验样机验证，辐照后燃料组件修复系统能够安全可靠地实现具有密集型棒束特点的燃料组件的拆卸和复装作业，为辐照后燃料组件再次入堆创造了条件。Abstract: In order to make full use of the post-irradiation fuel assembly, a fuel assembly repair process was proposed, and a repair system for post-irradiation fuel assembly was designed based on the dense and lightweight characteristics of the fuel assembly. Main parts were designed in detail and checked by seismic analysis using ANSYS. The results show that the stress and deformation of the main frame of the fuel assembly repair system meet the requirements. It is verified by the engineering test prototype that the system could dismantle and assemble the post-irradiation fuel assembly safely and reliably, and created conditions for the return of the fuel assembly.
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Key words:
- Fuel assembly /
- Repair /
- Dense fuel bundle /
- Replace fuel rod
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图 2 辐照后燃料组件修复工艺流程图
Figure 2. Process Flow Diagram of Post-Irradiation Fuel Assembly Repair System
图 3 翻转装置及新旧燃料棒暂存装置结构示意图
Figure 3. Structural Diagram of Flipping Device and TemporaryStorage Device for New and Old Fuel Rods
图 5 燃料棒更换三维平台结构示意图
Figure 5. Structural Diagram of the 3D Platform for Fuel Rod Replacement
图 6 燃料棒抓取工具抓头结构示意图
Figure 6. Schematic Diagram of Grabbing Head Structure of Fuel Rod Grabbing Tool
图 8 新旧燃料棒暂存孔位示意图
Figure 8. Schematic Diagram of Temporary Holes for New and Old Fuel Rods
表 1 辐照后燃料组件修复系统主体框架最大应力分类
Table 1. Maximum Stress Classification for the Main Framework of Irradiated Fuel Assembly Repair System
工况类别 组合载荷 应力类别 最大值/
MPa限值/
MPa设计工况 自重+静液压力+OBE载荷 σm 62.55 138.0 σm+σb 92.68 207.0 事故工况 自重+静液压力+SSE载荷 σm 122.91 165.6 σm+σb 181.94 248.4 σm—某截面上的平均应力；σb—抗拉应力 
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[1] 沈秋平,陈志清,徐道平,等. 燃料组件修复装置的设计[J]. 核技术,2010, 33(2): 148-151. [2] 刘晓松,李文钰. 反应堆燃料组件解体技术研究[J]. 核动力工程,2017, 38(5): 106-109. [3] 秦宇. ANSYS11.0基础与实例教程[M]. 北京: 化学工业出版社,2009: 186-229. -
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