核电机组系统性延伸运行的堆芯安全评价及经济性分析  

Core Safety Evaluation and Economic Analysis of Systematic Stretch-out Operation of Nuclear Power Units

作　　者：炊晓东[1] 谭杰 朱东来 尹浪 CHUI Xiaodong;TAN Jie;ZHU Donglai;YIN Lang(Research Institute of Nuclear Power Operation,Wuhan,Hubei Province,430074 China)

机构地区：[1]核动力运行研究所,湖北武汉430074

出　　处：《科技创新导报》2022年第29期33-38,共6页Science and Technology Innovation Herald

摘　　要：本文提出了系统性延伸运行的概念,分析了系统性延伸运行对换料堆芯安全评价和燃料经济性的影响。本文基于CPR1000机组现行18个月换料长短循环交替的燃料管理模式,考虑正常运行和系统性延伸运行两种工况,设计两组平衡循环燃料管理方案。通过数值计算,得到两种工况下堆芯核设计参数、通用关键中子动力学参数、特定事故中子动力学参数,对比两者之间的变化趋势,并与安全分析限值进行比较;同时,从燃料组件成本和发电损失等两方面着手,建立了延伸运行经济性评价模型。研究结果表明,系统性延伸运行对堆芯换料安全产生轻微的影响,但依然能够被18个月换料安全限值包络,系统性延伸运行可以显著增加燃料循环的经济性。The concept of systematic stretch-out operation is proposed,and the influence of systematic stretch-out operation on on the safety assessment of refueling core and fuel economy is analyzed.This study is based on the current 18 month refueling long and short cycle alternating fuel management mode of CPR1000 unit,considering two working conditions of normal operation and systematic stretch-out operation,design two groups of balanced cycle fuel management patterns.Through numerical calculation,the core nuclear design parameters,general key neutron dynamics parameters and specific accident neutron dynamics parameters under two working conditions are obtained.The variation trends between them are compared and compared with the safety analysis limits.At the same time,the economic evaluation model of stretch-out operation is established from the two aspects of fuel assembly cost and power generation loss.The results show that the systematic stretch-out operation has a slight impact on the core refueling safety,but it can still be enveloped by the 18 month refueling safety limit;systematic stretch-out operation can significantly increase the economy of fuel cycle.

关 键 词：系统性延伸运行 堆芯安全 燃料管理 燃料经济性 

分 类 号：TL384[核科学技术—核技术及应用]