High Temperature Materials Research and Development focuses on testing and characterizing Alloy 617--a nickel, chrome, cobalt, and molybdenum alloy--for its use in the heat exchanger or steam generator portion of a high temperature gas-cooled reactor (HTGR). This research is meant to help develop methods and structural data to address high temperature design elevated temperature and materials issues that have been identified by regulatory bodies.
Major R-&-D activities are focused on the experimental characterization of the various physical and mechanical properties of Alloy 617, and to assess the critical design parameters of the material. The outcome of this work will be a proposal to incorporate Alloy 617 into the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. This will enable design and construction of components for high temperature reactors at temperatures substantially above what is currently allowed. High Temperature Materials also supports selected university R&D through the Nuclear Energy University Programs (NEUP).