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This paper focuses on the abnormal fluctuation of yield during the electron beam welding process of fuel rods. Considering that the main defects leading to the rejection of fuel rods are surface scratches and out-of-tolerance straightness, through analysis and research, it is clarified that the direct causes of the abnormal yield of fuel rods are the excessively large aperture of the welding tooling baffle, the excessive use of the welding top, and the design of the top bearing. By taking measures such as reducing the aperture of the baffle, determining the reasonable number of uses for the welding top, and designing the top bearing, defects can be controlled in a timely manner, the yield can be improved, the manufacturing cost can be further reduced, and a foundation can be laid for the subsequent exploration of fuel rod manufacturing processes.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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