Abstract
Proper correlation and subsequent application of irradiation-effects data for materials exposed in different reactor environments depend upon a knownledge of the energy dependence of neutron damage. A theoretical model of neutron damage in austenitic steel was adjusted with available creep-strain data for austenitic steel irradiated at temperatures below ∼ 400°C. This procedure yielded a damage function for the neutron-energy dependence of irradiation-induced creep-strain. Although the derived damage function correlates available creep data, it is only roughly defined and is presented to meet immediate demands for such correlation. Additional and more accurate flux-spectral, fluence and property-change data for more test reactor environments are required to confirm the adequacy of the damage function. As a means of interpreting and correlating available test-reactor data for application to different environments, the present damage function will help establish proper engineering design requirements for use of austenitic steels in fast test, thermal test, and power reactors. The damage function is now being used to analyze irradiation conditions in the Fast Test Reactor (FTR) among others.
Published Version
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