Before revision: Specific phenomena addressed: Dimensional change (shrinkage and neutron-induced swelling ) Change in elastic modulus (measured by impulse excitation technique) Change in coefficient of thermal expansion Change in thermal conductivity Change in electrical resistivity Irradiation induced creep As the state of nuclear graphite in active reactors can only be determined at routine inspections, about every 18 months, mathematical modelling of the nuclear graphite as it approached end-of-life is important.
After revision: , as well as possible hardeningSpecific phenomena addressed: Dimensional change (shrinkage and neutron-induced swelling ) Change in elastic modulus (measured by impulse excitation technique) Change in coefficient of thermal expansion Change in thermal conductivity Change in electrical resistivity Irradiation induced creep As the state of nuclear graphite in active reactors can only be determined at routine inspections, about every 18 months, mathematical modelling of the nuclear graphite as it approached end-of-life is important.