为了降低用离心级联净化浓缩铀产品时净化级联精料端轻杂质的含量,研究了一种附加供料方法。通过给离心净化级联附供氟利昂C6F12,加大了离心净化级联精料端的杂质取料量,避免了轻杂质积累,保证了离心机的安全。以核燃料中典型的金属杂质C rO2F2为例进行计算表明,产品中金属杂质小于1×10-6,通过调节氟利昂的供料比例,净化级联末级的轻杂质含量可以限制在3%以下或更低,杂质中235U F6的丰度小于5×10-6。通过附供C6F12可以实现用离心级联净化核燃料的目的。 In order to reduce the light impurities in the purified cascade concentrate when the uranium product is purified by centrifugal cascade, an additional feeding method is studied. Centrifugal purification cascade by supplying freon C6F12, increased centrifugal purification cascade fine material side of the amount of impurities taken to avoid the accumulation of light impurities to ensure the safety of the centrifuge. Taking the typical metal impurity C rO2F2 in nuclear fuel as an example, the calculation results show that the metal impurity in the product is less than 1 × 10 -6. By adjusting the feed ratio of freon, the light impurity content of the final stage of the purifying cascade can be limited to less than 3% Lower, the abundance of 235U F6 in impurities is less than 5 × 10-6. Purification of nuclear fuel with a centrifugal cascade can be accomplished with the inclusion of the C6F12.