弥散颗粒对中子学计算影响的初步分析  

Preliminary Analysis of Dispersion Particle Effects on Neutronic Calculation

作　　者：秦冬[1] 张知竹[1] 倪东洋[1] 巨海涛[1] 于颖锐[1] QIN Dong ZHANG Zhi-zhu NI Dong-yang JU Hai-tao YU Ying-rui(Science and Technology on Reactor Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610041, China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,四川成都610041

出　　处：《核科学与工程》2016年第4期470-475,共6页Nuclear Science and Engineering

摘　　要：弥散颗粒燃料是一种先进的燃料元件形式,双重非均匀性是它的固有特性。本文基于弥散型燃料,使用MCNP程序对不同燃料颗粒直径、燃料富集度、燃料相体积、可燃毒物颗粒直径和可燃毒物类型的板栅元进行了分析,研究了双重非均匀性对中子学计算的影响,指出双重非均匀性在一定的尺寸下,对于纯燃料芯体板栅元影响较小,对含有弥散可燃毒物的板栅元影响较大,在反应性计算、临界安全分析时必须加以考虑。The dispersion particle fuel is an advanced fuel element form,and it has an intrinsic characteristic of double heterogeneity.This paper studies the double heterogeneity effect on neutronic in dispersion fuel element by analyzing fuel cell with different fuel particle diameters、enrichments、volume fractions、poison particle diameters、poison types.The result shows that the double heterogeneity effect is smaller in dispersion fuel element with only fuel particle,but is bigger in dispersion fuel element with poison particle,which must be considered in reactivity and critical safety analysis.

关 键 词：弥散颗粒 双重非均匀性 可燃毒物 计算模型 

分 类 号：TL329[核科学技术—核技术及应用]