Abstract：The standard nuclear fuel assembly is used for the on-site calibration of the nuclear fuel assembly measuring instrument. For the traceability requirements of geometric parameters of standard nuclear fuel assemblies, a geometric profile calibration device for standard nuclear fuel assembly was developed. Based on the concept of spatial coordinate measurement, the device uses multi-channel contact sensors as the profile measurement unit, and obtains the profile coordinates by combining the height position of the measuring table. Through straightness and torsion measurement and error compensation, the precision of geometric contour measurement is further improved. By integrating motion control and special measurement software, the standard nuclear fuel assembly geometric profile parameters (straightness, torsion, perpendicularity, parallelism) can be automatically detected. Through testing and analysis, the measurement uncertainty can meet the traceability requirements of standard nuclear fuel assembly.
2024, Vol. 45 
