Application of water-washed penetration testing in the weld of tube-tube sheet
The liquid penetrant inspection is required for the weld of tube-tube sheet in steam generator product which was used in the main system of the pressurized water reactor nuclear power plant nuclear island.The selection of liquid pene-trant inspection method,the requirements for the inspection devices,and the verification of inspection sensitivity were in-vestigated.Through experiment comparison analysis,the inspection control process for water-washed liquid penetrant in-spection of densely arranged tube-tube sheet welds was determined.Moreover,the product inspection results showed that when the liquid penetrant inspection was performed using the densely arranged and numerous tube sheet welds,the most ef-ficient inspection method was the water-washed type dye penetrant inspection method under the condition that the sensitivity requirements were met.
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