Effects of fuel temperature-shaping functions on xenon oscillations

Erik Walker; Andrew Godfrey; Shane Stimpson; Benjamin Collins

doi:10.1051/epjconf/202124702025

Effects of fuel temperature-shaping functions on xenon oscillations

Erik Walker, Andrew Godfrey, Shane Stimpson, Benjamin Collins

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

In coupled multiphysics simulations, single pin-averaged values are typically used to describe the temperature, power, and burnup within a given fuel pin. However, since xenon oscillations are largely driven by fuel temperatures, radially dependent quantities have been implemented in the Virtual Environment for Reactor Applications. These radial-shaping functions are based on Zernike polynomial expansions and allow information to pass effectively between codes with differing spatial meshes. This work examines the effects of radial fuel temperature-shaping functions on the behavior of axial xenon oscillations. A test problem was developed from full-core, multi-cycle depletions using as-built fuel data. The center 25 assemblies of the full-core case were used to test the radial-shaping function by inducing an axial xenon oscillation using an instantaneous control rod movement. The test case was run with and without the radial shapes, and each component was also run individually. Including the shaping functions significantly impacted the xenon oscillations for this problem; the magnitude and period of the oscillations were altered, and large pin power and soluble boron differences were observed. Testing each component individually showed that the radial fuel temperature-shaping function had the largest effect.

Original language	English
Title of host publication	International Conference on Physics of Reactors
Subtitle of host publication	Transition to a Scalable Nuclear Future, PHYSOR 2020
Editors	Marat Margulis, Partrick Blaise
Publisher	EDP Sciences - Web of Conferences
Pages	310-317
Number of pages	8
ISBN (Electronic)	9781713827245
DOIs	https://doi.org/10.1051/epjconf/202124702025
State	Published - 2020
Event	2020 International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020 - Cambridge, United Kingdom Duration: Mar 28 2020 → Apr 2 2020

Publication series

Name	International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020
Volume	2020-March

Conference

Conference	2020 International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020
Country/Territory	United Kingdom
City	Cambridge
Period	03/28/20 → 04/2/20

Funding

Nuclear Reactors under U.S. Department of Energy Contract No. DE-AC05-00OR22725. This research used resources of the Compute and Data Environment for Science (CADES) at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. The authors would also like to thank Exelon and Westinghouse for their support in generating the models used in this work. This research was supported by the Consortium for Advanced Simulation of Light Water Reactors This research was supported by the Consortium for Advanced Simulation of Light Water Reactors (www.casl.gov), an Energy Innovation Hub (http://www.energy.gov/hubs) for Modeling and Simulation of Nuclear Reactors under U.S. Department of Energy Contract No. DE-AC05-00OR22725. This research used resources of the Compute and Data Environment for Science (CADES) at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. The authors would also like to thank Exelon and Westinghouse for their support in generating the models used in this work. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Funders	Funder number
CADES
Consortium for Advanced Simulation of Light Water Reactors
Data Environment for Science
Energy Innovation Hub
Modeling and Simulation of Nuclear Reactors
U.S. Department of Energy	DE-AC05-00OR22725
Office of Science

Keywords

Oscillation
Polynomials
VERA
Xenon
Zernike

Access to Document

10.1051/epjconf/202124702025

Cite this

Walker, E., Godfrey, A., Stimpson, S., & Collins, B. (2020). Effects of fuel temperature-shaping functions on xenon oscillations. In M. Margulis, & P. Blaise (Eds.), International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020 (pp. 310-317). (International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020; Vol. 2020-March). EDP Sciences - Web of Conferences. https://doi.org/10.1051/epjconf/202124702025

Walker, Erik ; Godfrey, Andrew ; Stimpson, Shane et al. / Effects of fuel temperature-shaping functions on xenon oscillations. International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020. editor / Marat Margulis ; Partrick Blaise. EDP Sciences - Web of Conferences, 2020. pp. 310-317 (International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020).

@inproceedings{ed3512386fc142fe91fd72d65a1f5029,

title = "Effects of fuel temperature-shaping functions on xenon oscillations",

abstract = "In coupled multiphysics simulations, single pin-averaged values are typically used to describe the temperature, power, and burnup within a given fuel pin. However, since xenon oscillations are largely driven by fuel temperatures, radially dependent quantities have been implemented in the Virtual Environment for Reactor Applications. These radial-shaping functions are based on Zernike polynomial expansions and allow information to pass effectively between codes with differing spatial meshes. This work examines the effects of radial fuel temperature-shaping functions on the behavior of axial xenon oscillations. A test problem was developed from full-core, multi-cycle depletions using as-built fuel data. The center 25 assemblies of the full-core case were used to test the radial-shaping function by inducing an axial xenon oscillation using an instantaneous control rod movement. The test case was run with and without the radial shapes, and each component was also run individually. Including the shaping functions significantly impacted the xenon oscillations for this problem; the magnitude and period of the oscillations were altered, and large pin power and soluble boron differences were observed. Testing each component individually showed that the radial fuel temperature-shaping function had the largest effect.",

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Walker, E, Godfrey, A, Stimpson, S & Collins, B 2020, Effects of fuel temperature-shaping functions on xenon oscillations. in M Margulis & P Blaise (eds), International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020. International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020, vol. 2020-March, EDP Sciences - Web of Conferences, pp. 310-317, 2020 International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020, Cambridge, United Kingdom, 03/28/20. https://doi.org/10.1051/epjconf/202124702025

Effects of fuel temperature-shaping functions on xenon oscillations. / Walker, Erik; Godfrey, Andrew; Stimpson, Shane et al.
International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020. ed. / Marat Margulis; Partrick Blaise. EDP Sciences - Web of Conferences, 2020. p. 310-317 (International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020; Vol. 2020-March).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Walker E, Godfrey A, Stimpson S, Collins B. Effects of fuel temperature-shaping functions on xenon oscillations. In Margulis M, Blaise P, editors, International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020. EDP Sciences - Web of Conferences. 2020. p. 310-317. (International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020). doi: 10.1051/epjconf/202124702025

Effects of fuel temperature-shaping functions on xenon oscillations

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Keywords

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