22 Code Case for Alloy 617 A Code Case was developed to qualify the nickel-based Alloy 617 for Section III, Division 5“Rules for Construction of Nuclear Facility Components, HighTemperature Reactors”of the American Society of Mechanical Engineers (ASME) Boiler and PressureVessel Code. Only five alloys are currently qualified for elevated temperature nuclear construction.The last material added to this section of the Code was in the 1990s, and none of the qualified materials is a nickel-base alloy.The upper temperature limits for materials currently in Section III, Division 5 are insufficient for gas-cooled nuclear reactors designed for process heat or hydrogen generation applications.Thus qualification of Alloy 617 for use up to 950°C enables new applications for nuclear energy systems. Use of Alloy 617 for application up to 425°C has been approved for Subsection HB, Subpart A, Class A“Metallic Pressure Boundary Components for LowTemperature Service.” A second code Case to allow use of the alloy up to 950°C for up to 100,000 hours in the time-dependent material property regime has successfully passed the first round of balloting and is continuing through the approval process. This project is sponsored by the Department of Energy Office of Nuclear Energy’s (DOE-NE) Advanced ReactorTechnology,Very High Temperature Reactors Program, formally known as Next Generation Nuclear Plant (NGNP).This achievement is the culmination of an approximately 8-year effort that involved material testing and characterization, acquisition and vetting of historical data, and analysis of the resulting large data set to develop ASME-allowable stress values. Corrosion-ResistantTempering for the AdvancedTest Reactor Corrosion-resistant tempering of the aluminum alloy AA6061 was developed for the one-of-a-kind AdvancedTest Reactor (ATR) at INL. Modeling tools such asThermo- Calc and JMatPro were used to solve problems associated with pitting and erosion-corrosion. Today BWXTechnologies, Inc., which manufactures nuclear fuel for ATR, uses this tempering regimen in production. Morphological Analyses A computational method with materials science applications for morphological analysis was developed and patented. MorphoHawk solves many types of image and signal analysis challenges, opening up a different view to complex problems associated with material characterization.The method extracts useful information from images obtained under changing conditions, such as varied weather or lighting. By monitoring known objects or terrain, it can automatically identify the appearance of new objects of interest. It has applications in areas including image recognition, instrument analysis, wireless communications, and projectional research. INL’sAdvancedTestReactor Success Stories