Shattered pellet injection simulations with NIMROD
Abstract
Optimal strategies for disruption mitigation benefit from the understanding of details both spatially and temporally. Beyond the assessment of the efficacy of a particular proposed Disruption Mitigation System (DMS), ITER's longevity will require accounting of both mitigated and unmitigated disruptions. Accurate models and validated simulations that detail multiple ITER scenarios with mitigated and unmitigated disruptions are essential for accurate estimates of load damage. The primary candidate for ITER's DMS is Shattered Pellet Injection (SPI); its efficacy must be evaluated within the next several years. To perform critical time dependent 3-D nonlinear simulations, we have developed a particle based SPI model in the NIMROD code coupled to its modified single fluid equations with impurity and radiation [Izzo, Nucl. Fusion 46(5), 541 (2006)]. SPI validation simulations of the thermal quench and comparisons to DIII-D impurity scan experiments [Shiraki et al., Phys. Plasmas 23(6), 062516 (2016)] are presented. We also present an initial ITER Q = 10 pure neon SPI simulation and compare it with the DIII-D SPI simulations. NIMROD SPI simulations demonstrate that the ablating fragment drives strong parallel flows that transport the impurities and governs the thermal quench. Analysis of SPI simulations shows that the mixed deuterium/neon SPI results in amore »
- Authors:
-
[1];
[2];
[2];
- SLS2 Consulting, San Diego, CA (United States)
- General Atomics, San Diego, CA (United States)
- ITER Organization, St. Paul Lez Durance (France)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1529932
- Alternate Identifier(s):
- OSTI ID: 1508197
- Grant/Contract Number:
- FG02-95ER54309; SC0016452; AC02- 05CH11231; FC02-04ER54698
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Kim, Charlson C., Liu, Yueqiang, Parks, Paul B., Lao, Lang L., Lehnen, Michael, and Loarte, Alberto. Shattered pellet injection simulations with NIMROD. United States: N. p., 2019.
Web. doi:10.1063/1.5088814.
Kim, Charlson C., Liu, Yueqiang, Parks, Paul B., Lao, Lang L., Lehnen, Michael, & Loarte, Alberto. Shattered pellet injection simulations with NIMROD. United States. https://doi.org/10.1063/1.5088814
Kim, Charlson C., Liu, Yueqiang, Parks, Paul B., Lao, Lang L., Lehnen, Michael, and Loarte, Alberto. Mon .
"Shattered pellet injection simulations with NIMROD". United States. https://doi.org/10.1063/1.5088814. https://www.osti.gov/servlets/purl/1529932.
@article{osti_1529932,
title = {Shattered pellet injection simulations with NIMROD},
author = {Kim, Charlson C. and Liu, Yueqiang and Parks, Paul B. and Lao, Lang L. and Lehnen, Michael and Loarte, Alberto},
abstractNote = {Optimal strategies for disruption mitigation benefit from the understanding of details both spatially and temporally. Beyond the assessment of the efficacy of a particular proposed Disruption Mitigation System (DMS), ITER's longevity will require accounting of both mitigated and unmitigated disruptions. Accurate models and validated simulations that detail multiple ITER scenarios with mitigated and unmitigated disruptions are essential for accurate estimates of load damage. The primary candidate for ITER's DMS is Shattered Pellet Injection (SPI); its efficacy must be evaluated within the next several years. To perform critical time dependent 3-D nonlinear simulations, we have developed a particle based SPI model in the NIMROD code coupled to its modified single fluid equations with impurity and radiation [Izzo, Nucl. Fusion 46(5), 541 (2006)]. SPI validation simulations of the thermal quench and comparisons to DIII-D impurity scan experiments [Shiraki et al., Phys. Plasmas 23(6), 062516 (2016)] are presented. We also present an initial ITER Q = 10 pure neon SPI simulation and compare it with the DIII-D SPI simulations. NIMROD SPI simulations demonstrate that the ablating fragment drives strong parallel flows that transport the impurities and governs the thermal quench. Analysis of SPI simulations shows that the mixed deuterium/neon SPI results in a more benign thermal quench due to the enhanced transport caused by the additional deuterium. These results suggest that an optimal pellet mixture exists for the SPI system.},
doi = {10.1063/1.5088814},
journal = {Physics of Plasmas},
number = 4,
volume = 26,
place = {United States},
year = {Mon Apr 22 00:00:00 EDT 2019},
month = {Mon Apr 22 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
Disruptive plasma simulations in EAST including 3D effects
journal, September 2019
- Chen, S. L.; Villone, F.; Sun, Y. W.
- Nuclear Fusion, Vol. 59, Issue 10