电焊机2026，Vol.56Issue(3)：88-94,7.DOI:10.7512/j.issn.1001-2303.2026.03.12
基于增材制造技术的空间曲面核燃料组件下管座设计
Design of Spatially Curved Bottom Nozzle of Fuel Assembly based on Additive Manufacturing Technology
摘要
Abstract
To address the inherent design contradiction among the three primary functions of a nuclear fuel assembly bottom nozzle—debris filtration,coolant flow capacity,and structural load-bearing—this paper proposes an integrated functional-structural design featuring a spatially curved filtration channel.Leveraging the integral forming advantages of additive manu-facturing technology and employing the TRIZ methodology through technical contradiction analysis and inventive prin-ciples,the proposed design transforms conventional planar filtration into a spatially curved swept-rib structure,achieving functional integration of debris filtration and structural support.Based on this concept,five swept-function models—expo-nential,polynomial,Bezier,linear,and sinusoidal—were selected to construct representative structural units of the bottom nozzle.Comparative analyses were conducted on debris filtration efficiency,coolant flow performance,and structural strength.Numerical results indicate that the designed bottom nozzle exhibits excellent debris filtration performance,with a maximum filtration efficiency of 93.3%.Specifically,the Bezier and linear models achieve a filtration efficiency of 96.7%for elongated debris.Regarding coolant flow performance,the Bezier and sinusoidal models reduce pressure drop by ap-proximately 29%compared to the polynomial model.Differences in structural strength among the five models are negli-gible,suggesting that the curved geometry has a limited impact on load-bearing capacity.Based on a comprehensive multi-performance evaluation,the Bezier curve swept model demonstrates the most balanced performance across debris filtration,coolant flow capacity,and structural strength,making it the optimal design.This study validates the feasibility of integrating additive manufacturing with innovative design methodologies for the development of key structural components in nuclear fuel assemblies and provides a reference for the design and engineering application of high-performance bottom nozzles.关键词
核燃料组件/增材制造/空间曲面/异物过滤/TRIZKey words
nuclear fuel assembly/additive manufacturing/spatially curved surface/debris filtration/TRIZ分类
能源科技引用本文复制引用
韩元吉,刘孟龙,简文均,张博,朱发文,蒲曾坪..基于增材制造技术的空间曲面核燃料组件下管座设计[J].电焊机,2026,56(3):88-94,7.基金项目
中核集团"青年英才项目" （）
中国核动力研究设计院青年人才基金(KJCX-2024-QR-04) （KJCX-2024-QR-04）
