压水堆零功率水平下功率系数测量方法研究及其工业应用  

Study on the Method of Power Coefficient Measurement for PWR at Zero Power Level and its Industrial Application

作　　者：蔡光明 程宏亚 郑东佳 章圣斌 彭超 CAI Guangming;CHENG Hongya;ZHENG Dongjia;ZHANG Shengbin;PENG Chao(Fujian Fuqing Nuclear Power CO.LTD,Fuqing of Fujian Prov.350300,China)

机构地区：[1]福建福清核电有限公司,福建福清350300

出　　处：《核科学与工程》2024年第1期49-54,共6页Nuclear Science and Engineering

摘　　要：传统压水堆核电厂均在功率台阶上实施功率系数测量试验,VVER反应堆则是在零功率水平下进行相关试验。功率台阶上反应性测量的数据处理存在较大的误差,在低功率下由于试验方法的原因导致功率测量结果存在较大的不确定性。因此,这两种传统方法获得的功率系数具有很大的测量误差和不确定度。本文在VVER方法的基础上,提出了功率系数测量的新方法:采用中间量程电流和电流-功率转换系数计算得到准确的核功率,结合测量的反应性变化计算得到功率系数。本文提出的新方法成功应用于福清核电厂不同机组的多个燃料循环的测量试验,应用结果表明:本文提出的新方法对不同机组多个燃料循环的结果不确定性小,测量数据具有很强的稳定性。The traditional PWR power coefficient measurement is performed on the specific highpower level;while the VVER reactor is measured under the zero-power level.There are large errors in the data processing of the reactivity measurement on the high-power level,and the power measurement at zero-power level also has a large uncertainty due to the method.Therefore,there exist notable errors and uncertainties in the measurement values of power coefficients by the above two traditional methods.Based on the VVER method,Fuqing Nuclear Power Plant has improved the method:First,calculating the accurate nuclear power with the current of the intermediate-range detectors and the current-power conversion coefficient;then determining the power coefficient with the signal variation of the measured reactivity.The newly-proposed method has been applied in Fuqing Nuclear Power Plant for different units and multiple fuel cycles.The application results indicate that the newly-proposed method is robust,which can provide the reliable measurement values for different units and fuel cycles.

关 键 词：功率系数 测量 零功率水平 

分 类 号：TL375.1[核科学技术—核技术及应用]