Metal Hydride Simulations Using SWIFT

Matthews, Christopher; Shivprasad, Aditya; Cooper, M.W.D.

doi:10.2172/1829624

Cited by 3 publications

(6 citation statements)

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“…This section summarizes the different NEAMS capabilities applied in this project with a focus on the new or existing modules that were assessed in FY-2023 as summarized in Table 2-1. The codes considered for microreactor modeling include Griffin [6] for neutronics, BISON [7] for thermomechanics, Sockeye [8] for heat pipe modeling, SAM [9] for 1D flow modeling across the coolant channels and for balance of plant modeling [10], and SWIFT [11] for hydrogen redistribution modeling. All the codes are developed within the MOOSE framework to facilitate multiphysics coupling [12].…”

Section: Methods Description and Assessmentmentioning

confidence: 99%

High-fidelity multiphysics load following and accidental transient modeling of microreactors using NEAMS tools: Application of NEAMS codes to perform multiphysics modeling analyses of micro-reactor concepts

Stauff,

Abdelhameed,

Cao

et al. 2023

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Section: Methods Description and Assessmentmentioning

confidence: 99%

High-fidelity multiphysics load following and accidental transient modeling of microreactors using NEAMS tools: Application of NEAMS codes to perform multiphysics modeling analyses of micro-reactor concepts

Stauff,

Abdelhameed,

Cao

et al. 2023

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“…• New modeling assessment should include hydrogen diffusion modeling in the hydride metal moderator blocks with the SWIFT code [8] (which could not be used in FY-2022 due to delay in licensing process). Various advanced BISON models for TRISO that include explicit modeling of many particles in various regions of the multiphysics core model for stochastic assessment of failure of particles.…”

Section: Future Workmentioning

confidence: 99%

“…A preliminary HP-MR full core model and multiphysics simulations was distributed on the NRIC VTB [7]. An important physical phenomenon discussed in FY-2021 is the hydrogen dissociation and relocation within hydride metal, which was planned to be further assessed in FY-2022 through coupling of the SWIFT code [8] within the multiphysics simulations. Unfortunately, the SWIFT license could not be obtained by the ANL team in time for assessment in FY-2022.…”

Section: Introductionmentioning

confidence: 99%

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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“…Detailed neutronics analysis are provided in Appendix 1. Finally, a hydrogen dissociation model described in Appendix 2 is implemented in MOOSE [22,23] (as a placeholder to SWIFT code [24] that could not be used at the time of this work) and applied to the VHTM model. The recently developed mesh generation capabilities in MOOSE's Reactor module was used to mesh the INFINIT unit cell for both the Griffin main application and the BISON sub-application, while the Sockeye 2D-RZ mesh was built by its intrinsic mesh generator.…”

Section: Multiphysics Modeling Of a Infinit Designmentioning

confidence: 99%

“…The detailed kinetics of hydrogen in the VHTM is a complex problem involving Fickian and Soret diffusion different phases and reactions on the phase boundaries. These complex mechanisms are supposed to be solved by the underdevelopment SWIFT code [24], which is currently sponsored by the NEAMS program. In this report, a simplified approximation approach based on the characteristic time was used to semiquantitatively capture the kinetics of hydrogen behavior in the VHTM.…”

Section: Approximated Hydrogen Kinetics In the Vhtmmentioning

confidence: 99%