停堆碱性运行对“华龙一号”CIPS风险的影响研究  

Study on the Effect of Alkali Shutdown Operation on HPR1000 CIPS Risk

作　　者：曹建华 王华鑫 毛玉龙 金德升 胡艺嵩 蒙舒祺 CAO Jianhua;WANG Huaxin;MAO Yulong;JIN Desheng;HU Yisong;MENG Shuqi(China Nuclear Power Technology Research Institute Co.,Ltd,Shenzhen of Guangdong Prov.518000,China;China Nuclear Power Engineering Co.,Ltd,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 [2]中广核工程有限公司,广东深圳518000

出　　处：《核科学与工程》2023年第6期1222-1227,共6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：为评估中广核“华龙一号”停堆碱性控制对燃料组件垢致轴向功率偏移风险(CIPS)的影响,本文从理论分析和软件计算两个角度进行了研究。结果表明,压水堆停堆碱性控制会显著减少燃料组件表面污垢的释放,主要表现为抑制镍铁氧化物(Ni_(x)Fe_(3-x)O_(4))的分解。该机组停堆碱性控制状态下燃料组件表面的污垢继承率约为85%,最大硼沉积质量为0.099 7 kg,评估结果为CIPS低风险。但相比停堆酸性控制,实施停堆碱性控制后的压水堆在后续燃料循环内发生CIPS的风险更高,具体风险等级还需结合机组的热工水力参数和一回路水化学环境进行评估。In order to evaluate the effect of alkali condition during reactor shutdown on crud induced power shift(CIPS) for HPR1000 pressurized water reactor,theoretical analysis and calculation of independent copyright software were carried out respectively in the present work.The results show that the alkali shutdown condition significantly reduced the release of crud which was deposited on the fuel cladding,inhibiting the decomposition of nickel ferrite(Ni_(x)Fe_(3-x)O_(4)).For a running domestic PWR,the crud carryover between continuous cycles for a alkali shutdown condition was about 85%,the largest boron deposition mass on fuel assembles was about 0.099 7 kg,resulting in a low risk of CIPS.In comparison with the acid shutdown condition,the risk of CIPS happened in alkali shutdown condition was even higher.However,the specific risk level of CIPS should be evaluated in combination with the thermal hydraulic parameters and the primary water environment.

关 键 词：压水堆核电站 停堆碱性控制 污垢继承率 CIPS 

分 类 号：TL339[核科学技术—核技术及应用]