Detailed analyses of a TRISO-fueled microreactor: Modeling of a Micro-Reactor System using NEAMS Tools

Stauff, Nicolas; Mo, K.; Cao, Yongqiang; Thomas, Jan; Miao, Yuxin; Zou, Ling; Nunez, Dominique E.; Shemon, Emily; Feng, Bo; Ni, Kaijie

doi:10.2172/1826285

Cited by 8 publications

(34 citation statements)

References 17 publications

(26 reference statements)

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“…In addition to illustrating the steps required to conduct a MOOSE-Sockeye MultiApp coupled simulation, the tutorial focused on assessing the modeling capabilities of Sockeye's Conduction Model through a simplified unit-cell modeling exercise. The unit-cell modeled is based on the HP-MR developed in FY-2021 [6]. The model's setup includes the use of several user objects of type LayeredSideFluxAverage and LayeredAverage to exchange boundary information at various axial locations at every time step.…”

Section: Sockeyementioning

confidence: 99%

“…The HP-MR was designed at ANL in FY-2021 as a modeling experiment gathering nonconventional technologies employed in the microreactor industry that may challenge modeling and simulation tools. The HP-MR is a 2MW thermal reactor shown in Figure 3-1 using TRISO fuel with 19.95 at% Low-Enriched Uranium (LEU) in a hexagonal graphite matrix [6]. 30 fuel assemblies are surrounded by one ring of beryllium reflector and 12 control drums-.…”

Section: Analysis Of a Heat Pipe Microreactor (Hp-mr)mentioning

confidence: 99%

“…The HP-MR exercise combines both a simple unit-cell and a full core models used to test out various modeling challenges on various scales. Most of the HP-MR work was completed in FY-2022 and is detailed in [6]. This involved preliminary multiphysics simulations of a load following transient using the diffusion and SPH neutronic solver.…”

Section: Analysis Of a Heat Pipe Microreactor (Hp-mr)mentioning

confidence: 99%

“…This was performed using the MOOSE MultiApp system by coupling Griffin, Bison and Sockeye. A demo case was also setup for the 1/6 of this full core using the diffusion approximation in Griffin neutronic calculation [6]. The FY-2021 full core coupled BISON/Sockeye models were made publicly available on the NRIC VTB [7].…”

Section: Analysis Of a Heat Pipe Microreactor (Hp-mr)mentioning

confidence: 99%

“…This project builds on years of expertise acquired by different teams and programs [2,3,4,5]. In previous work completed in FY-2021 [6], initial multiphysics modeling of a heat pipe microreactor (HP-MR) unit-cell and full core was completed, demonstrating the ability of NEAMS codes to perform multiphysics simulations on an example microreactor. A preliminary HP-MR full core model and multiphysics simulations was distributed on the NRIC VTB [7].…”

Section: Introductionmentioning

confidence: 99%

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Multiphysics Analysis of Load Following and Safety Transients for MicroReactors

Stauff¹,

Abdelhameed²,

Cao³

et al. 2022

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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.

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Section: Sockeyementioning

confidence: 99%

Section: Analysis Of a Heat Pipe Microreactor (Hp-mr)mentioning

confidence: 99%

Section: Analysis Of a Heat Pipe Microreactor (Hp-mr)mentioning

confidence: 99%

Section: Analysis Of a Heat Pipe Microreactor (Hp-mr)mentioning

confidence: 99%