1964-01-01

Mechanical Analysis for Cylindrical Fuel Elements of a Fast Reactor for Use in a Lunar Powerplant 640224

A theoretical, mechanical analysis for strain and stress distributions in a long, solid cylindrical fuel element of a fast reactor suitable for use in a lunar powerplant is presented. In the analysis primary effects of thermal-cycling growth, irradiation growth, swelling, and creep developed in the fuel material are taken into account. From basic assumptions, the equations for the components of strain and stress are derived. Based on results of an illustrative example, it is found that the order of magnitude of the neutron flux, degree of irradiation, cladding thickness, and properties have important effects on strain and stress distributions produced in the fuel element.

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