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从辐照过的核燃料中提取纯化铀和钚,目前仍以 Purex 流程为主。在该流程中得到的铀产品按 β—放射性物质的含量是合乎要求的;但就γ—放射性物质的含量而言,就超过了允许量的一到两倍。所含γ—放射性物质主要是~(95)Zr—(95)Nb 等裂变元素。从铀中除去~(95)Zr—~(95)Nb 在国外早就提出了用硅胶柱吸附除去的方法;我国台湾省也报
Purification of uranium and plutonium from irradiated nuclear fuel is still dominated by the Purex process. The uranium products obtained in this process are desirably beta-radioactive; however, in the case of gamma-radioactive substances, one to two times the permissible amount is exceeded. The γ-radioactive substances contained are mainly fission elements such as 95 (95) Zr- (95) Nb. The removal of ~ (95) Zr- ~ (95) Nb from uranium has long been proposed to be removed by silica gel column adsorption abroad. Taiwan Province of China also reported