Fluorescent liquid penetrant test equipment, for testing welded parts of the evaporator for phosphate liquid waste generated by solvent waste treatment at Tokai Reprocessing Plant, was developed. It is composed of a CCD camera and UV light for observation, nozzles for fluorescent liquid, water for washing, and air for drying, and a positioning mechanism that can adjust the position of this equipment relative to the inspection object by three-axis operation, varying the insert length, bending angle and turn angle. Also, the equipment can be inserted by way of the nozzle for inspection, whose inside diameter is 60 mm, into the evaporator. It was confirmed that the standard faults, as defined in JIS, could be observed by the equipment. Then, a fluorescent liquid penetrant test of an evaporator that has treated phosphate liquid waste for 18 years with a heating temperature of about 105°C was performed. The result of the test indicates the absence of faults in the evaporator.
