IMPACT OF THIN NANOTECHNOLOGY COATINGS ON THE STRESS-STRAIN STATE OF THE CYLINDRICAL CLADDING MADE FROM ZR-BASED ALLOYS FOR NUCLEAR FUEL ELEMENTS

Abstract

The actual problem about using the thin nanotechnology coatings for increasing operability of the cladding of nuclear fuel made from the Zr-based alloys is considered from the point of view the mechanical elastic interaction between the coating and the cladding. The mathematical model of thin coatings of the cylindrical cladding is presented in the form of especial boundary conditions for considering the equations of theory of elasticity, defining the stress-strain state of the cladding. It is shown, that thin coatings can decrease noticeably the stresses in the cladding made from the Zr-base alloys, widely used in fuel elements for nuclear reactors.