Development of Geometric Profile Calibration Device for Standard
Nuclear Fuel Assembly
SUN Anbin1,2,GAO Ting1,CAO Tieze1, QIAO Lei1
1. Beijing Changcheng Institute of Metrology and Measurement, Beijing 100095, China
2. Beijing University of Aeronautics and Astronautics, Beijing 100191, China
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 is 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 analysis and test, it is verified that the standard uncertainty of straightness and parallelism is 0.01 mm, the standard uncertainty of torsion is 0.007 mm and the standard uncertainty of perpendicularity is 0.017 mm. The above data show that the device can meet the traceability requirements of standard nuclear fuel assemblies.
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2024, Vol. 45 
