美国拥有大规模生产浓缩铀的气体扩散技术,现正采用气体离心浓缩技术并且加紧研究先进的同位素分离技术。由于对未来需要量和成本测不准,使得人们难以对核燃料循环中浓缩铀需要量和费用作出长期的详细规划;但是,由于这些浓缩方法具有很不相同的特性,因此,研究采用这些浓缩方法的效果和假定情况下的运行对策是有意义的。 The United States has a gas diffusion technology for the large-scale production of enriched uranium. It is now using gas centrifugal enrichment technology and has stepped up its research on advanced isotope separation technology. Due to the uncertainty of future requirements and costs, it is difficult for people to make long-term detailed plans for the uranium enrichment requirements and costs in the nuclear fuel cycle; however, due to the very different characteristics of these enrichment methods, the study adopted these enrichment methods. The effect and the running countermeasures under the assumption are significant.