Materials for Nuclear Systems
Introduce the coupled damage mechanisms governing fuels, cladding and reactor structures.
An unusual environment
Nuclear materials experience radiation damage, thermal gradients, stress, coolant chemistry and long service times simultaneously.
Radiation defects
Energetic particles displace atoms, creating defect clusters, swelling, hardening and segregation.
Fuel and cladding
Fuel must retain fission products and conduct heat, while cladding provides containment and corrosion resistance with low neutron absorption.
Ageing and qualification
Irradiation-assisted stress-corrosion cracking, creep and embrittlement require surveillance and conservative life assessment.
Engineering takeaway
Data from unirradiated material cannot be transferred directly; radiation changes both structure and mechanism.