基于VSOP的球床式高温气冷堆随机倒料初步研究  

Preliminary Research of Pebble Bed High-Temperature Gas- Cooled Reactor with Random Refueling Approach Based on VSOP

作　　者：邬鸿伟 夏冰[2] 佘顶[2] 李富[2] 张作义[2] Wu Hongwei;Xia Bing;She Ding;Li Fu;Zhang Zuoyi(Department of Engineering Physics,Tsinghua University,Beijing,100084,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing,100084,China)

机构地区：[1]清华大学工程物理系,北京100084 [2]清华大学核能与新能源技术研究院,北京100084

出　　处：《核动力工程》2024年第5期1-6,共6页Nuclear Power Engineering

基　　金：中核集团青年英才项目(2022年);国家重点研发计划项目(2020YFB1901600)。

摘　　要：球床式高温气冷堆(简称球床堆)具有连续在线换料的特点,燃料球在球床堆堆芯中缓慢流动,使用物理热工计算程序VSOP采用近似、平均的倒料方式模拟此过程,但在一定程度上抹除了球流运动的随机性。本文基于VSOP程序改进了球床堆堆芯倒料模型,提出随机倒料方法,研究了卸料合并平均效应的影响。结果表明,随机倒料能够提供更精细的卸料燃耗深度分布,卸料平均效应会导致燃耗峰展宽重叠。The pebble bed high-temperature gas-cooled reactor(PB-HTGR)is characterized by continuous online refueling.The fuel ball flows slowly in the core of the reactor.The VSOP code,which is widely used in engineering design,employs an approximate and average refueling method to simulate the process,tending to diminish the randomness of the pebble flow of PBR to some extent.In this paper,a new approach of random refueling based on VSOP code is proposed,and it improves the core refueling model and focuses on the impact of the average merging effect of discharging fuel.The results show that the random refueling approach can provide a more refined discharge fuel burnup probability distribution,and the average merging effect of discharging fuel tends to the broadening and overlapping of burnup peaks.

关 键 词：球床式高温气冷堆 VSOP程序 随机倒料 卸料平均效应 卸料燃耗深度分布 

分 类 号：TL334[核科学技术—核技术及应用]