Nuclear reactor operating modes under multiple cyclic power changes have been promoted
recently, and fuel element cladding behavior under the multiple cyclic power changes has
been widely known as a key issue in terms of rod design and reliability. A model of nuclear
reactor fuel rod cladding failure estimation under multiple cyclic power changes is proposed.
The model is built on the basis of the following admissions of the energy version of creep
theory: processes of cladding creep and destruction proceed together and affect each other …