基于燃耗信任制的乏燃料贮存格架吸收体布置及其临界安全分析

Arrangement and Critical Safety Analysis of Absorber of Spent Fuel Storage Framework Based on Burnup Trust System

将煤耗信任制作为基础,使用MCNP5和APOLLO的程序实现乏燃料储存格架中的可溶硼浓度研究种子有效增值因子(Keff)影响,并且分析中子毒物类型与布置方式对于中子有效增值因子。通过本文的研究结果表示,格架中的可溶硼浓度变化改变Keff变化速度在富集度不断升高过程中不断的缓慢,具备近似线性的改变。格架中的中子毒物之间相互干扰效应能够对毒物就爱只造成影响,中子毒物价值和硼不锈钢(BSS)板间距具备线性关系。以乏燃料组件之外的中子能谱分子,对中子毒物布置方案进行改进,以此使乏燃料储存系统中的临界经济性和安全性得到提高。

Based on the trust of coal consumption,the soluble boron concentration in spent fuel storage grid was realized by using the program of MCNP5 and APOLLO to study the effect of seed effective value-added factor(Keff).The effective increment factor of neutron poison type and arrangement for neutrons is analyzed.The results of this paper show that the change of soluble boron concentration in the framework changes the change rate of Keff slowly and has an approximate linear change in the process of increasing enrichment.The mutual interference effect between neutrons in the framework can only affect the poison love,the value of neutrons and boron stainless steel(BSS).There is a linear relationship between the plates.The neutron poison arrangement scheme is improved by using the neutrons energy spectrum molecules outside the spent fuel assembly,so that the critical economy and safety of the spent fuel storage system can be improved.