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The Spallation Neutron Source - a Tool for Materials Discovery

Mr. Riemer will describe the Spallation Neutron Source – a facility that provides pulsed neutron beams for science. SNS produces neutrons with an accelerator-based system that delivers high-energy proton pulses to a flowing mercury target. The pulses generate a dynamic response in the target vessel that must be evaluated for fatigue. It also leads to mercury cavitation as pressure waves reflect off the vessel wall. Both erosion and fatigue have caused leaks and interrupted neutron production. Reliability is fundamental to satisfying sponsor expectations. The target engineering team employs computational tools in pursuit of robust operation, including Abaqus, fe-safe, Isight and Tosca.