基于EDEM的核燃料微球自动化装填方法研究

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中图分类号：TL291 文献标志码：A doi：10.3969/j.issn.1006-0316.2025.08.008

文章编号：1006-0316（2025）08-0049-06

AnAutomatic FillingMethodofNuclear-fuelMicrospheresBased on EDEM

QUWangqinqin1，WANG Jie'，WANGYiwei² （1.School of Mechanical Engineering，Sichuan University，Chengdu 610o65， China; 2.Medical

Department， Wangjiang Campus Hospital of Sichuan University Hospital， Chengdu 61oo65，China）

Abstract ： To address the low efficiency of traditional manual filling for nuclear fuel microspheres，this study proposes an automatic filing method based on microsphere pouring principles，systematically investigating the influenceof hole depth parameters in loading plateson fuel fixation effectiveness.By establishing a three-dimensional mechanical model of nuclear fuel microspheresand blind-hole loading plates，force equilibrium equations were constructed to derive the theoretical relationship between critical detachment conditions and hole depths.Discrete element EDEM simulationswere employed to analyze microsphere stacking behaviors under three typical hole depths （ 0.20mm ，0.30 mm， 0.32 mm）， determining the optimal range of holedepth parameters based on mechanical analysis.Anautomatic filing experimental platform was developed based on simulation results，incorporating a multi-hole synchronous filing mechanism for uniform distribution of microspheres and a vision inspection system for real-time quality monitoring.Experimental results demonstrate that the hole depth of 0.30mm achieves a filling rate exceeding 95% while maintaining proper microsphere exposure. This research validates the effectiveness of parameter optimization through mechanical modeling and EDEMsimulations for nuclear fuel loading plate design，providing a novel technical approach for preparing fuel assemblies for nuclear power plants.

KeyWords ：automated device;EDEM simulation; nuclear-fuel microspheres;structural design

核能作为清洁高效的新型能源载体，在优化我国能源结构、实现“双碳”目标中具有战略地位[1]。（剩余5687字）