Design method of a fuel assembly according optimized efforts use in a nuclear light water reactor

摘要

Design method of a fuel assembly for nuclear light water reactor comprising structure components in zirconium alloy, characterized in that: - the traction or compression uniaxial stresses they are subjected such components during calculated the life of the assembly, - and zirconium alloys in which these components are made according the following criteria are selected: * the subject to an axial compression or transverse understood σ at -10 and -20 MPa will be made of an alloy whose content in different elements of Zr does not exceed 5%, and Sn content of which is between Sn = (-0.025 · σ - 0.25)% and Sn = -0.05 · σ * the% against stress axial compression or transverse σ comprised between 0 and -10 MPa will be made of an alloy whose content of different elements Zr not exceeding 5% and Sn content of which is understood ent re Sn = trace and Sn = (0.05 · σ + 1)% * subjected to the axial tensile stress σ or cross between 0 and +10 MPa will be made of an alloy whose content of different elements Zr not exceeding 5% and whose Sn content is between Sn = 0.05 · σ% and Sn = (0.07 · σ + 1)% * subjected to the axial tensile stress σ or cross between + 10 and +20 MPa will be made of an alloy whose content of different elements Zr not exceeding 5% and whose Sn content is between 0.50% and 1.70%.