铀浓缩产品丰度控制分析

The Analysis on Uranium Enrichment Product Abundance Control

从离心级联实际生产运行出发,基于价值函数公式,推算出因丰度波动在精料收料容器中造成的分离功损失的表达式。公式显示,丰度波动会导致精料容器内发生分离功损失,且与收料质量呈线性关系,与丰度波动大小呈二次函数关系。分析引起级联精料丰度波动的各种因素变化是否会造成级联内部分离功损失的变化。结果表明,每一种影响因素的参数变化时,级联内部机组压力、流量都会重新调整并进入新的稳态,导致级联偏离理想工况,分离能力下降且级联混合分离功损失相应增加。因此,对精料流产品丰度控制提出优化策略,在实际运行中,应尽可能减少影响产品丰度的参数变化,以减小分离功的损失。

Starting from the practical production and operation of centrifugal cascade, based on the value function formula, the expression of separation work loss due to abundance fluctuation in concentrate receiving container is drawed, which indicates that the abundance fluctuation will lead to the separation work loss in the concentrate container, and has a linear relationship with the total weight of concentrate, whereas a quadratic function relationship with the abundance fluctuation. It is also analyzed whether the variation of various factors causing the fluctuation of concatenated concentrate abundance will cause the change of separation work loss in cascade. The analysis shows that the parameter of change will influence the pressure and the flow rate of cascade internal unit, which will be readjusted automatically and enter a new steady state. As a result, the cascade deviates from the ideal condition, the separation capacity decreases and the mixed separation power loss increases accordingly. Therefore, the optimization strategy for the abundance control of concentrate flow products is put forward. In the actual operation in the future, the abundance fluctuation should be controlled in a given range, and the variation of parameters affecting the abundance of the product should be diminished as much as possible in order to reduce the loss of separation work.