用于pin-by-pin输运计算的SP3解析基函数展开节块方法研究  

Study on SP3 Analytic Function Expansion Nodal Method for pin-by-pin Transport Calculation

作　　者：彭良辉 汤春桃 毕光文 张宏博 杨波 PENG Lianghui;TANG Chuntao;BI Guangwen;ZHANG Hongbo;YANG Bo(Shanghai Nuclear Engineering Research&Design Institute Co.Ltd.,Shanghai 200233,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200233

出　　处：《原子能科学技术》2020年第7期1241-1247,共7页Atomic Energy Science and Technology

基　　金：大型先进压水堆及高温气冷堆核电站重大专项资助项目(2019ZX06002033)。

摘　　要：基于三阶简化球谐函数(SP3)方法,分别采用3种不同的偏流表达形式,开发了SP3解析基函数展开节块程序。利用基准例题对程序进行了数值检验,并对3种偏流表达形式的计算精度进行了对比分析。数值结果表明:SP3解析基函数展开节块方法应用于pin-by-pin输运计算时,能获得较高的棒功率计算精度;3种偏流表达形式中,Marshak偏流表达形式计算精度最高,另外两种偏流表达形式计算精度稍差,但更利于程序算法简化及并行算法设计。Based on the simplified P 3(SP 3)method,a SP 3 analytic function expansion nodal code was developed under three different partial current expressions.The numerical test of the code was carried out and the accuracy of the three partial current expressions was compared.The numerical results show that the pin-by-pin transport calculation based on the SP 3 analytic function expansion nodal method can obtain high accuracy of the pin power.Among the three different partial current expressions,Marshak’s expression has the highest accuracy while the other two expressions are more conducive to code’s algorithm simplification and parallel algorithm design.

关 键 词：SP3方法 解析基函数展开节块方法 pin-by-pin输运 偏流表达形式 

分 类 号：TL329.2[核科学技术—核技术及应用]