The tools developed within the U.S. Department of Energy (DOE) Office of Nuclear Energy's Nuclear Energy Advanced Modeling and Simulation (NEAMS) program aim at providing highfidelity multiphysics modeling capabilities to support design and licensing of various types of advanced nuclear reactors, including the technologies being developed by U.S. microreactor vendors relying on heat pipe and gas-cooled technologies. In FY-2022, the NEAMS Multiphysics Applications team made significant progress both in demonstrating capabilities applied to microreactor problems, and in supporting NEAMS developers.Three microreactor models were developed through this project to support a demonstration of NEAMS tools capabilities for solving challenging microreactor modeling problems:1-The Heat Pipe MicroReactor (HP-MR) unit-cell and full core models developed in FY-2021 were updated with increased fidelity. This work demonstrates the capability to perform high-fidelity multiphysics load-following and heat pipe cascading failures using coupled Griffin-BISON-Sockeye simulations. Such analysis confirmed the HP-MR concept ability to operate in a flexible way and for the reactor to follow the load, and its ability to avoid heat pipe cascading failure unless designed with high power close to operating failure limits of its heat pipes.2-A Gas-Cooled MicroReactor (GC-MR) assembly model was developed incorporating various modeling challenges expected for horizontal gas-cooled microreactors. A wide range of high-fidelity multiphysics transient analyses were simulated by coupling Griffin/BISON/SAM. These simulations showcased various types of load-following transients (large daily or short frequent power variations) and accidental transients that are specific to GC-MRs (flow blockage, depressurization, etc.). This initial analysis confirms the ability of the GC-MR to withstand such accidental transients without leading to severe accidents. Leveraging this experience, a full core GC-MR was also modelled based on industry design and initial steady-state multiphysics simulations (Griffin/SAM) were completed.3-An initial model of the Kilopower Reactor Using Stirling Technology (KRUSTY) experiment was developed leveraging initial work performed at LANL. This model was significantly updated and improved, and initial steady-state multiphysics simulations (with coupled Griffin/BISON/Sockeye) were completed.
The Laboratory's main facility is outside Chicago, at 9700 South Cass Avenue, Argonne, Illinois 60439. For information about Argonne and its pioneering science and technology programs, see www.anl.gov. DOCUMENT AVAILABILITYOnline Access: U.S. Department of Energy (DOE) reports produced after 1991 and a growing number of pre-1991 documents are available free at OSTI.GOV (http://www.osti.gov/), a service of the US Dept. of Energy's Office of Scientific and Technical Information.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.