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在原来核燃料棒UO2芯块间隙无损检查仪的基础上,改进了γ射线准直器结构和物理测量仪器,提高了241Am放射性活度(3.7GBq),使检测速度由原来的1.5m/min,提高到10m/min,可检测最小间隙为0.4mm,测量精度为±0.048mm,置信概率为95%。采用新方法检测弹簧空腔长度,并增加了多定标测量道数,使弹簧空腔长度的检测精度为±0.947mm,置信概率为95%。该设备是以核技术为中心的机电一体化产品,具有自动上料、自动分选、自动下料等全自动控制功能。
On the basis of original UO2 pellet gap non-destructive tester, the structure of γ-ray collimator and physical measuring instrument were improved, the radioactive activity of 241Am (3.7GBq) was improved, the detection speed was increased from 1.5m / min, Increased to 10m / min, detectable minimum gap of 0.4mm, measurement accuracy of ± 0.048mm, confidence probability of 95%. A new method was used to detect the length of the spring cavity and the number of multi-calibrated measurement channels was increased. The detection accuracy of spring cavity length was ± 0.947mm, and the confidence probability was 95%. The device is a nuclear technology as the center of the mechatronic products, with automatic feeding, automatic sorting, automatic feeding and other automatic control functions.