Feasibility Study: A New Cable-Tray Hanger Concept for Nuclear Power Plants. Final Report (PWR; BWR)

摘要

This study partially assessed the feasibility of using flexible connectors in Class 1E systems to attach cable trays to their stiff hanger systems. Using finite-element, classical analytical, and experimental studies, it was found that a flexible connector with appropriate stiffness and damping characteristics could be used to isolate trays from hanger vibration and significantly reduce hanger loads during seismic events if the connectors could be adequately tuned to account for system variables. Finite-element techniques were used to select a flexible connector for a specified base hanger system. Tests were conducted on one-third-scale models to establish values for some of the parameters and to partially verify the numerical and analytical methods. Calculations were then performed using the dimensions of the base hanger system. (ERA citation 08:031627)