基于群堆管理的压水堆核电厂首循环装载研究  

Study on First Cycle Loading of PWR Nuclear Power Plant Based on Multi-reactor Management

作　　者：廖鸿宽 胡钰莹 于颖锐[3] 王丹 段永强 李天涯 何彩云[1] Liao Hongkuan;Hu Yuying;Yu Yingrui;Wang Dan;Duan Yongqiang;Li Tianya;He Caiyun(Chengdu Hezong Nuclear Power Engineering Co.,Ltd.,Chengdu,610213,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]成都核总核动力研究设计工程有限公司,成都610213 [2]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,成都610213 [3]中国核动力研究设计院,成都610213

出　　处：《核动力工程》2024年第3期268-271,共4页Nuclear Power Engineering

摘　　要：堆芯装载方案是关系到电厂经济性和安全性最为关键的设计内容之一,而传统的首循环装载方案由于采用全堆全新燃料组件的方式,不可避免地导致一批从首循环中卸出的组件无法继续使用,燃料经济性与堆芯经济性均欠佳,亟需开展燃料经济性更优,燃料组件使用更为合理的首循环装载设计方法研究。本文提出了基于群堆管理的压水堆核电厂首循环装载设计方法,通过多机组燃料组件的共享使用,将多个机组的首循环进行群堆设计,提高首循环使用的新燃料组件富集度,实现循环长度需求,在保证各机组循环长度的基础上减少新燃料组件数目,可显著提高燃料利用率和首循环卸料组件燃耗,实现了机组经济性的显著提升,以华龙一号堆芯开展验证,结果表明,群堆管理模式下,在循环长度相当的情况下可实现双机组减少41组新燃料组件,堆芯各项参数满足设计限值要求,可为后续机组首循环装载设计提升核能经济性和竞争力提供参考。The core loading pattern is one of the most crucial design components for the effectiveness and safety of a power plant.As new fuel assemblies are used for whole core in the traditional first cycle loading pattern,many discharged assemblies from the first cycle will unavoidably be abandoned,resulting in insufficient fuel and core economy.Therefore,it is imperative to conduct research on approach for the first cycle loading design with improved fuel economy and more rational fuel assembly utilization.In this paper,a design method for the first cycle loading of PWR nuclear power plant based on multi-reactor management is proposed.By sharing the fuel assemblies of multiple units,the first cycle of multiple units is designed as multireactor,so as to improve the enrichment of new fuel assemblies used in the first cycle and meet the cycle length requirements.Reducing the number of new fuel assemblies on the basis of ensuring the cycle length of each unit can significantly improve the fuel utilization rate and the burnup of the first cycle unloading assembly,realizing a significant increase in the unit's economy.A representative HPR1000 reactor is used for verification.The results demonstrate that 41 new fuel assemblies can be reduced in two units with the same cycle length under the multi-reactor mode,and all the core parameters are within the design limits.This study can provide reference for the first cycle loading design of subsequent units to enhance the economy and competitiveness of nuclear energy.

关 键 词：群堆管理 首循环装载 燃料利用率 

分 类 号：TL329.2[核科学技术—核技术及应用]