17 Recognizing Expertise Krzysztof Gofryk The nuclear engineer was selected by DOEs Office of Science as one of 44 scientists to receive funding as part of DOEs Early Career Research Program. Krzysztof has gained recognition for his research in actinide materials under extreme conditions. Dr. David Nigg The Laboratory Fellow was recognized as an American Nuclear Society Fellow the highest membership level within ANS. The distinction is reserved for senior members who have compiled a professional record of significant contributions advancing nuclear science engineering and technology. Dr. Shannon Bragg-Sitton The nuclear engineer received the ANS Mary Jane Oestmann Professional Womens Achievement Award for her exceptional contributions to the U.S. Department of Energys Light Water Reactor Sustainability Program and nuclear hybrid energy programs. Advanced reactor sensors National DOE missions aim to develop advanced capabilities that can monitor in-pile conditions inside a nuclear reactor. One INL project monitors nonintrusive active noise sources emanating from within the reactor to determine what is happening inside. The researchers analyzed frequency harmonics and compared changes in the acoustic signature to physical phenomena documented in the reactor logs. The team then developed the first panoramic view of acoustic signals showing different ATR process states from startup to shutdown. Qualifying new nuclear materials Some next-generation reactor designs require materials that can withstand more heat than current reactors. Steels and other alloys for nuclear reactors today can withstand temperatures up to 750 degrees C but the next generation of reactors will require materials qualified for up to 950 degrees C. One such material is a nickel- based metal mixture called Alloy 617. INL and other national lab scientists have been gathering data to determine its behavior specifically high-temperature strength and the effect of welding on these mechanical properties. The team submitted its analysis of Alloy 617 characteristics to the American Society of Mechanical Engineers ASME which maintains the consensus code that defines material properties that engineers reference to ensure safe design. This effort represents the first attempt in more than 20 years to qualify a new high-temperature nuclear reactor material.