燃料组件管座压降试验研究

Experimental Study on Pressure Drop Characteristics of Fuel Assembly Nozzles

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%.

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 ob- tained 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 fric- tional pressure drop of test specimen can be ignored; the relative expanded uncertainty of resistance coeffi- cent for both the CAP1400 and the reference top and bottom nozzles are all lower than 1.5%; the resist- ance coefficient of CAP1400 top nozzle is 9% lower than that of the top reference test piece, while the re- sistance coefficient of CAP1400 bottom nozzle is 2.4% lower than that of the bottom reference test piece.