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Preparation method of uranium dioxide-graphene-like composite fuel pellet
The invention belongs to the technical field of nuclear fuel preparation, and relates to a preparation method of a uranium dioxide-graphene-like composite fuel pellet. The preparation method comprises the following steps: (1) dissolving polyacrylonitrile with a solvent, adding uranium dioxide powder, and uniformly mixing to obtain an intermediate; (2) evaporating the intermediate to remove the solvent to obtain uranium dioxide-polyacrylonitrile mixed powder; (3) loading the uranium dioxide-polyacrylonitrile mixed powder into a mold for cold press molding, and demolding to obtain a fuel pellet biscuit; And (4) sintering the fuel pellet biscuit in a reducing atmosphere to obtain the uranium dioxide-graphene-like composite fuel pellet. By utilizing the preparation method of the uranium dioxide-graphene-like composite fuel pellet, the novel composite fuel pellet with high thermal conductivity can be prepared, so that the economical efficiency and the safety of a nuclear reactor during operation are improved.
本发明属于核燃料制备技术领域，涉及一种二氧化铀‑类石墨烯复合燃料芯块的制备方法。所述的制备方法包括如下步骤：(1)将聚丙烯腈用溶剂溶解后加入二氧化铀粉末，混合均匀后得到中间体；(2)蒸发中间体除去溶剂后得到二氧化铀‑聚丙烯腈混合粉末；(3)将二氧化铀‑聚丙烯腈混合粉末装入模具冷压成型，脱模，得到燃料芯块素坯；(4)将燃料芯块素坯在还原性气氛下进行烧结，得到二氧化铀‑类石墨烯复合燃料芯块。利用本发明的二氧化铀‑类石墨烯复合燃料芯块的制备方法，能够制备得到高导热性的新型复合燃料芯块，从而提高核反应堆运行时的经济性和安全性。
Preparation method of uranium dioxide-graphene-like composite fuel pellet
The invention belongs to the technical field of nuclear fuel preparation, and relates to a preparation method of a uranium dioxide-graphene-like composite fuel pellet. The preparation method comprises the following steps: (1) dissolving polyacrylonitrile with a solvent, adding uranium dioxide powder, and uniformly mixing to obtain an intermediate; (2) evaporating the intermediate to remove the solvent to obtain uranium dioxide-polyacrylonitrile mixed powder; (3) loading the uranium dioxide-polyacrylonitrile mixed powder into a mold for cold press molding, and demolding to obtain a fuel pellet biscuit; And (4) sintering the fuel pellet biscuit in a reducing atmosphere to obtain the uranium dioxide-graphene-like composite fuel pellet. By utilizing the preparation method of the uranium dioxide-graphene-like composite fuel pellet, the novel composite fuel pellet with high thermal conductivity can be prepared, so that the economical efficiency and the safety of a nuclear reactor during operation are improved.
本发明属于核燃料制备技术领域，涉及一种二氧化铀‑类石墨烯复合燃料芯块的制备方法。所述的制备方法包括如下步骤：(1)将聚丙烯腈用溶剂溶解后加入二氧化铀粉末，混合均匀后得到中间体；(2)蒸发中间体除去溶剂后得到二氧化铀‑聚丙烯腈混合粉末；(3)将二氧化铀‑聚丙烯腈混合粉末装入模具冷压成型，脱模，得到燃料芯块素坯；(4)将燃料芯块素坯在还原性气氛下进行烧结，得到二氧化铀‑类石墨烯复合燃料芯块。利用本发明的二氧化铀‑类石墨烯复合燃料芯块的制备方法，能够制备得到高导热性的新型复合燃料芯块，从而提高核反应堆运行时的经济性和安全性。
Preparation method of uranium dioxide-graphene-like composite fuel pellet
一种二氧化铀-类石墨烯复合燃料芯块的制备方法
MA HAORAN (author) / ZHANG YAN (author) / ZHU LIYANG (author) / YANG ZHIHONG (author) / YANG SULIANG (author) / TIAN GUOXIN (author) / GUO BOLONG (author) / SUI ZHENG (author) / FENG HAINING (author)
2021-04-27
Patent
Electronic Resource
Chinese
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