TITLE: Neutronics Methods InternLOCATION: Bellevue, WA, USATerraPower is a nuclear technology company based in Bellevue, Washington. At its core, the company is working to raise living standards globally through a more affordable, secure and environmentally friendly form of nuclear energy along with innovations in medical isotopes to improve human health. In 2006, TerraPower originated with Bill Gates and a group of like-minded visionaries who evaluated the fundamental challenges to raising living standards around the world. They recognized energy access was crucial to the health and economic well-being of communities and decided that the private sector needed to take action and create energy sources that would advance global energy deployment. TerraPower's mission is to be a world leader in new nuclear technologies, while developing innovators and future leaders in the nuclear field. As a result, the company's activities in the fields of nuclear energy and related sciences are yielding significant innovations in the safety and economics of nuclear power, hybrid energy and medical applications - all for significant human health benefits.TerraPower is seeking to hire highly motivated and forward-thinking professionals who are interested in focusing on advanced nuclear reactor research and development and influencing change within the nuclear power landscape and bringing forward the critical production of medical isotopes.Neutronics Methods InternThe Neutronics Methods Intern will work with the Nuclear Methods team to develop a high-quality decay heat dataset to be used for decay heat validation. This data will be developed from transient shutdown tests performed on the Fast Flux Test Facility (FFTF). These heavily-instrumented tests were initially performed to characterize the core's natural circulation behavior prior to commencing full power operations and helped to significantly increase the industry's understanding of passive safety in SFRs. Accurate predictions of decay heat are necessary for the design of important features of the Natrium plant such as the Reactor Air Cooling (RAC) system.The intern will work closely with the Nuclear Methods team to explore this potential validation source and develop a dataset that can be used in subsequent formal validation activities. While the extraction of the decay heat information from the transient data is clearly possible in principle, the exact methodology has not yet been developed. The major goal of the project is to research and develop this methodology and implement it to develop a high-quality, documented validation dataset that can be used in subsequent efforts by the Nuclear Methods team. Time permitting, the Intern will participate in these subsequent efforts by using an existing FFTF computational model to compare decay heat predictions from the model against the validation dataset.ResponsibilitiesUnderstand the background and basis of the FFTF transient shutdown testsDevelop methodology to reduce and extract decay heat measurements from the tests to produce validation datasetUse FFTF computational neutronics model to generate predictions of decay heat and compare against validation datasetPerform uncertainty assessments of both the validation dataset as well as the predicted computational resultsKey Qualifications and SkillsNuclear engineering skillsFast reactor physics and design intuition, particularly with transient plant behaviorThermal/hydraulics experienceExperience in understanding and executing nuclear design/analysis methodologies, especially decay heatExperience with some nuclear engineering software such as DIF3D, MC2, PARTISN, MCNP, Serpent, SCALE, PARCS, APA, CASMO, DRAGON, ARMI, etc. preferredComputational skillsGood computational expertise required: we consider computers to be the universe at our fingertips rather t