The issues of evaluation features of reinforced concrete structures of protective shells of the NP-1000 project of nuclear power plants with a the water-water energetic reacto (VVER-1000) during the construction period are considered. The results of measurements of the strength characteristics of concrete, the thickness of the protective layer of reinforcement and the parameters of cracks made in the framework of the instrumental survey are given. The conducted instrumental survey allowed us to obtain fairly complete and reliable information about the parameters of the elements of the protective pressure-tight shell to perform calculations of the stress-strain state of the shell.

Keywords: protective pressure-tight shell, methods of non-destructive testing, deformations, displacements, cracks, strength of concrete