FUEL ELEMENT SIMULATOR (ALTERNATIVES)

摘要

FIELD: nuclear power engineering; production and application of nuclear reactor fuel assemblies at nuclear power stations. ^ SUBSTANCE: proposed simulator designed for investigating impact of axial tensile stresses in fuel element claddings and their elongation on formation of fuel assembly as a whole has its core installed in can as far as it will go until stopped by ends of plugs and is built integral with the latter to form single thermomechanical system; cylindrical rods of core are made of material whose coefficient of linear thermal expansion is not lower than that of fuel element cladding. As an alternative, at least two of core cylindrical rods are made of material whose coefficient of linear thermal expansion is not lower than that of nuclear fuel. As still another alternative, cylindrical rods of core are made of material whose coefficient of linear thermal expansion on length equal to fuel pile length equals that of nuclear fuel and on remaining length cylindrical rods of core are made of material whose coefficient of linear thermal expansion equals that of cladding material. ^ EFFECT: reduced cost and enhanced precision of experiment. ^ 3 cl, 2 dwg