Abstract
This chapter discusses the application of three-dimensional finite elements for the analysis of irradiation-induced stresses in nuclear reactor fuel elements. It describes a code named TRISTAN that has been developed for solution of certain three-dimensional problems, for example, the stresses and deformations of the end regions of a proposed fuel element known as the teledial, which has point symmetry only. The chapter also presents preliminary results obtained in testing the code, details of computing experience, and conclusions concerning the usefulness of such a code. The correspondence principle of viscoelasticity theory may be used to form the time-dependent solution from the elastic solution.
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