弥散燃料与可燃毒物双重非均匀性分析  

Analysis of the Double-heterogeneity in Fuel with Dispersed Particle-type Burnable Poison or Dispersed Particle-type Fuel

作　　者：娄磊[1] 姚栋[1] 柴晓明[1] 于颖锐[1] 彭星杰 刘琨[1] 田超[1] 王晨琳[1] 刘勇[1] 谢运利 LOU Lei;YAO Dong;CHAI Xiao-ming;YU Ying-rui;PENG Xing-jie;LIU Kun;TIAN Chao;WANG Chenlin;LIU Yong;XIE Yun-li(National Key Laboratory of Science and Technology on Reactor System Design Technology,Nuclear Power Institute of China,Cheng Du 610000,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610000

出　　处：《中国核电》2020年第1期98-103,共6页China Nuclear Power

基　　金：青年基金(计划编号:2016JQ0045)。

摘　　要：采用传统均匀打混模型计算具有双重非均匀性的弥散燃料或可燃毒物会带来一定的计算偏差。从双重非均匀处理判定公式出发,分析弥散燃料或可燃毒物均匀打混模型计算偏差与各因素的关系,指出针对较高富集度或较大颗粒尺寸的燃料,以及相对较大尺寸可燃毒物颗粒,采用传统均匀打混模型会带来较大的计算偏差。RPT方法可以用来处理弥散燃料以及吸收截面不太大的可燃毒物,但对于硼和钆等吸收截面较大的毒物,RPT方法也会带来较大的计算偏差,同时对新型RPT方法进行了初步探索,虽依然不适用强吸收可燃毒物颗粒,但可以为RPT方法向强吸收体可燃毒物扩展提供思路和借鉴。The traditional volumetric homogenization method on fuel with double heterogeneity will bring a certain calculation derivation.In the paper,from the DH inequality criterion,the relationship between the calculation deviation of volumetric homogenization method and various factors on the dispersed particle-type fuel or burnable poison is analyzed.It is pointed out that for high enrichment or large size fuel particles and relatively large burnable poison particles,the traditional volumetric homogenization method will bring a large calculation deviation.RPT method can be used to treat dispersed particle-type fuel and dispersed particle-type burnable poisons whose absorption cross section is not too large,while it will bring a large calculation deviation to dispersed poisons with large absorption cross section.At the end,a preliminary exploration was made on the new RPT method,although it’s still not suitable for strong absorber dispersed particle-type burnable poisons,it can provide ideas and reference to the expansion of RPT method to strong absorber dispersed particle-type burnable poisons.

关 键 词：弥散燃料 弥散可燃毒物 双重非均匀性 RPT方法 

分 类 号：TL3[核科学技术—核技术及应用]