【摘要】 介绍了CAP1400燃料组件上下管座压降试验过程和数据处理方法,得到了阻力系数及其测量不确定度,并与对比燃料组件上下管座的试验结果进行了对比分析.结果表明:试验本体的摩擦压降基本可以忽略;CAP1400上下管座和对比上下管座的阻力系数的相对扩展不确定度均小于1.5%;CAP1400上管座的阻力系数相比对比上管座降低约9%;CAP1400下管座的阻力系数相比对比下管座降低约2.4%.更多还原

【Abstract】 To measure the pressure drop in top and bottom nozzles of CAP1400 fuel assembly,experimental tests were conducted,after which the coefficient of resistance and the uncertainty of measurement were obtained through data processing with the appropriate method proposed,while a comparison and an analysis were performed between above test results and the data of reference test pieces.Results show that the frictional pressure drop of test specimen can be ignored;the relative expanded uncertainty of resistance coefficent for both the CAP1400 and the reference top and bottom nozzles are all lower than 1.5%;the resistance coefficient of CAP1400 top nozzle is 9%lower than that of the top reference test piece,while the resistance coefficient of CAP1400 bottom nozzle is 2.4%lower than that of the bottom reference test piece.更多还原