Through the analysis of nondestructive testing of zirconium tube defects, the defects of ultrasonic dimension measurement mainly include the excessive ellipticity of the tube end, the sudden decrease or increase of the outer diameter of the end, and the sudden change of the middle size. The main defects in ultrasonic detection are longitudinal cracks on the inner surface of pipes and polishing scratches on the outer surface. The defects of eddy current testing mainly include inner surface bonding, uneven pickling size and so on. In view of the above defects, measures such as improving the rolling reliability of finished product mill, optimizing the rolling die design of finished product tube, removing the sticking defects of tube billet and tube inner surface by pickling, selecting suitable sand belt and using the retracting function of polishing head during polishing were put forward to improve the yield of nuclear zirconium alloy tube in nondestructive testing. Zirconium tube internal pressure closed end burst testing system. Aiming at the ultra-high pressure servo system, the mathematical model of the pressure control servo system is derived, and the fuzzy PID algorithm is used to control the load of the system to carry out the blasting test, so as to overcome the adverse effect of the nonlinear system on the electro-hydraulic servo system. The simulation results and experimental results show that the fuzzy PID controlled ultra-high pressure system has good control performance. The system achieves the closed end blasting performance of the zirconium alloy nuclear fuel cladding tube at room temperature and the process of applying internal pressure to the material.
Zirconium tube internal heating device, including insulating base, one end connected to described base of zirconium tube closed at one end, set in above mentioned in zirconium tube at one end and base connected to the other of the quartz tube closed at one end, set at U of the quartz tube, the heating bar and set it between ceramic insulation film on both ends of the heating rods, described the base set has two electrodes, described at both ends of the heating rods are respectively connected to the described electrode, described described ceramic insulation film and base fixed connection, due to the present invention adopts using quartz tube heating rod inside the zirconium tube heating, zirconium tube can quickly reach the highest temperature is 1450 ℃, in addition, the heat resistance Stable, and high temperature resistant tungsten rod and quartz tube processing is very difficult, simple production, easy to shape.
