3. NATURE OF PHYSICAL PROBLEM SOLVED
LIFE1 is designed to predict the in-pile behaviour of cylindrical fast reactor fuel elements.
Assuming axial symmetry, the generalized plane-strain analysis combines models for fuel restructuring, migration of fuel consti- tuents, fuel swelling due to accumulation of fission products, fission gas release, hot pressing of the fuel, and clad swelling due to void nucleation and growth. An iterative procedure allows the code to compute the detailed thermal and mechanical response of the fuel element during any specified history of normal reactor power cycling. Up to 10 axial sections are allowed to account for variations in power and coolant temperature, and an option is included for treatment of encapsulated elements.