不同混合堆芯方案对压水堆CIPS风险的影响研究  

Study on the Influence of Different Hybrid Core Schemes on the PWR CIPS Risk

作　　者：冯英杰 邱斌 FENG Yingjie;QIU Bin(China Nuclear Power Technology Research Institute,Shenzhen of Guangdong Prov.518000,China)

机构地区：[1]中广核研究院有限公司,广东深圳518000

出　　处：《核科学与工程》2023年第1期7-11,共5页Nuclear Science and Engineering

基　　金：国家自然科学基金(U20B0211,针对堆芯氧化腐蚀产物材料-热工-中子行为的多物理耦合机理);国家自然科学基金(52171085,模拟压水堆一回路冷却剂中燃料包壳管表面污垢沉积行为与机理研究)。

摘　　要：为提升核电站的经济效益,越来越多的机构开始研发更加高效的先进核燃料组件。当堆芯引入一种新型燃料组件时,堆芯中的两种组件就会形成混合堆芯。垢致轴向功率偏移(Crud Induced Power Shift,CIPS)作为影响核电安全运行的关键因素之一,其在混合堆芯中的研究也有着重要意义。本文针对某压水堆不同混合堆芯方案下的CIPS风险进行了分析评估,计算结果表明,当混合堆芯引入新型燃料组件较少时,CIPS风险变化较小;当引入较多新型燃料组件时,CIPS风险有所降低。研究结果为新型燃料组件入堆的安全评估提供了数据支撑,同时也为混合堆芯中CIPS风险评估提供了思路和参考。In order to improve the economic benefits of nuclear power plants,more and more institutions began to develop more efficient advanced nuclear fuel assemblies.When a new fuel assembly is inducted into the core,the two different fuel assembly components in the core will form a hybrid core.As an important factor affecting the operation safety of nuclear power,the study of CIPS(crud induced power shift)risk of the mixed core is also of great significance.In this paper,the CIPS risk of a PWR under different schemes in the hybrid core is analyzed and evaluated.The calculation results show that the CIPS risk has little impact when a little amount of new fuel assemblies are inducted into the core,while more the CIPS risk reduces as more new fuel assemblies are inducted.The study results provide data support for the safety assessment of a new fuel assembly,and also ideas and reference for CIPS risk assessment in the hybrid core.

关 键 词：压水堆 混合堆芯 污垢 硼析出 垢致轴向功率偏移 

分 类 号：TL364[核科学技术—核技术及应用]