The safety and high operating reliability of nuclear reactors can be assured only by 100% noncontact monitoring of the geometrical parameters of the heat-producing assemblies that make them up. To solve this problem, a complex of optoelectronic facilities has been developed and created at the Design-Technological Institute of Scientific Instrumentation, Siberian Branch, Russian Academy of Sciences. These include the KONTROL' system for measuring the geometrical parameters of the heat-producing elements (HPEs) of nuclear reactors VVÉR-1000 and VVÉR-440, the LMM laser measurement machine for monitoring the geometrical parameters of the spacer grids, system GRAD for dimensional monitoring of the end fittings of the HPEs, and the PROFIL' system for measuring the relief and depth of surface defects of the HPEs. The operating principles, the structure, the technical characteristics, and results of production tests of the resulting facilities are given.

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