【摘要】 研制了单探头和双晶片探头两种类型超声探头,通过对模拟燃料棒破损前后超声信号变化规律的研究,确定了超声检测探头的型式及检测方法。研究结果表明,可通过15~20mm声程范围内超声回波幅度的差异来判定燃料棒是否破损;与单探头相比,所研制的双晶片探头更适用于燃料棒破损超声检测,该双晶片探头能有效分辨的燃料棒内的最小水量为0.2mL。更多还原

【Abstract】 Single-and pair-wafer ultrasonic probes were developed.Through the study on the change of ultrasonic signal during fuel rod failure,the detection method and pattern of probe were determined.The results show that fuel rod failure can be identified through the difference of ultrasonic echo amplitude on the acoustic range of 15-20 mm.Compared with single-wafer probe,pair-wafer probe can detect the fuel rod failure more easily,and can effectively detect the minimum amount of water with 0.2mL.更多还原