Liquid lithium loop system to solve challenging technology issues for fusion power plant
Abstract
Here, steady-state fusion power plant designs present major divertor technology challenges, including high divertor heat flux both in steady-state and during transients. In addition to these concerns, there are the unresolved technology issues of long term dust accumulation and associated tritium inventory and safety issues. It has been suggested that radiation-based liquid lithium (LL) divertor concepts with a modest lithium-loop could provide a possible solution for these outstanding fusion reactor technology issues, while potentially improving reactor plasma performance. The application of lithium (Li) in NSTX resulted in improved H-mode confinement, H-mode power threshold reduction, and reduction in the divertor peak heat flux while maintaining essentially Li-free core plasma operation even during H-modes. These promising results in NSTX and related modeling calculations motivated the radiative liquid lithium divertor (RLLD) concept and its variant, the active liquid lithium divertor concept (ARLLD), taking advantage of the enhanced or non-coronal Li radiation in relatively poorly confined divertor plasmas. To maintain the LL purity in a 1 GW-electric class fusion power plant, a closed LL loop system with a modest circulating capacity of ~ 1 liter/second (l/sec) is envisioned. We examined two key technology issues: 1) dust or solid particle removal and 2) real timemore »
- Authors:
-
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- National Institute for Fusion Science, Gifu (Japan)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Illinois, Urbana-Champaign, IL (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1373687
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 57; Journal Issue: 11; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Ono, Masayuki, Majeski, Richard P., Jaworski, Michael A., Hirooka, Yoshihiko, Kaita, Robert, Gray, Travis K., Maingi, Rajesh, Skinner, Charles H., Christenson, Michael, and Ruzic, David N. Liquid lithium loop system to solve challenging technology issues for fusion power plant. United States: N. p., 2017.
Web. doi:10.1088/1741-4326/aa7f41.
Ono, Masayuki, Majeski, Richard P., Jaworski, Michael A., Hirooka, Yoshihiko, Kaita, Robert, Gray, Travis K., Maingi, Rajesh, Skinner, Charles H., Christenson, Michael, & Ruzic, David N. Liquid lithium loop system to solve challenging technology issues for fusion power plant. United States. https://doi.org/10.1088/1741-4326/aa7f41
Ono, Masayuki, Majeski, Richard P., Jaworski, Michael A., Hirooka, Yoshihiko, Kaita, Robert, Gray, Travis K., Maingi, Rajesh, Skinner, Charles H., Christenson, Michael, and Ruzic, David N. Wed .
"Liquid lithium loop system to solve challenging technology issues for fusion power plant". United States. https://doi.org/10.1088/1741-4326/aa7f41. https://www.osti.gov/servlets/purl/1373687.
@article{osti_1373687,
title = {Liquid lithium loop system to solve challenging technology issues for fusion power plant},
author = {Ono, Masayuki and Majeski, Richard P. and Jaworski, Michael A. and Hirooka, Yoshihiko and Kaita, Robert and Gray, Travis K. and Maingi, Rajesh and Skinner, Charles H. and Christenson, Michael and Ruzic, David N.},
abstractNote = {Here, steady-state fusion power plant designs present major divertor technology challenges, including high divertor heat flux both in steady-state and during transients. In addition to these concerns, there are the unresolved technology issues of long term dust accumulation and associated tritium inventory and safety issues. It has been suggested that radiation-based liquid lithium (LL) divertor concepts with a modest lithium-loop could provide a possible solution for these outstanding fusion reactor technology issues, while potentially improving reactor plasma performance. The application of lithium (Li) in NSTX resulted in improved H-mode confinement, H-mode power threshold reduction, and reduction in the divertor peak heat flux while maintaining essentially Li-free core plasma operation even during H-modes. These promising results in NSTX and related modeling calculations motivated the radiative liquid lithium divertor (RLLD) concept and its variant, the active liquid lithium divertor concept (ARLLD), taking advantage of the enhanced or non-coronal Li radiation in relatively poorly confined divertor plasmas. To maintain the LL purity in a 1 GW-electric class fusion power plant, a closed LL loop system with a modest circulating capacity of ~ 1 liter/second (l/sec) is envisioned. We examined two key technology issues: 1) dust or solid particle removal and 2) real time recovery of tritium from LL while keeping the tritium inventory level to an acceptable level. By running the LL-loop continuously, it can carry the dust particles and impurities generated in the vacuum vessel to the outside where the dust / impurities can be removed by relatively simple dust filter, cold trap and/or centrifugal separation systems. With ~ 1 l/sec LL flow, even a small 0.1% dust content by weight (or 0.5 g per sec) suggests that the LL-loop could carry away nearly 16 tons of dust per year. In a 1 GW-electric (or ~ 3 GW fusion power) fusion power plant, about 0.5 g / sec of tritium is needed to maintain the fusion fuel cycle assuming ~ 1 % fusion burn efficiency. It appears feasible to recover tritium (T) in real time from LL while maintaining an acceptable T inventory level. Laboratory tests are being conducted to investigate T recovery feasibility with the surface cold trap (SCT) concept.},
doi = {10.1088/1741-4326/aa7f41},
journal = {Nuclear Fusion},
number = 11,
volume = 57,
place = {United States},
year = {Wed Jul 12 00:00:00 EDT 2017},
month = {Wed Jul 12 00:00:00 EDT 2017}
}
Web of Science
Works referenced in this record:
Plasma-material interactions in current tokamaks and their implications for next step fusion reactors
journal, December 2001
- Federici, G.; Skinner, C. H.; Brooks, J. N.
- Nuclear Fusion, Vol. 41, Issue 12
Active radiative liquid lithium divertor concept
journal, December 2014
- Ono, M.; Jaworski, M. A.; Kaita, R.
- Fusion Engineering and Design, Vol. 89, Issue 12
NSTX plasma operation with a Liquid Lithium Divertor
journal, October 2012
- Kugel, H. W.; Allain, J. P.; Bell, M. G.
- Fusion Engineering and Design, Vol. 87, Issue 10
Impurity transport in edge plasmas with application to liquid walls
journal, May 2002
- Rognlien, T. D.; Rensink, M. E.
- Physics of Plasmas, Vol. 9, Issue 5
Experiments with lithium limiter on T-11M tokamak and applications of the lithium capillary-pore system in future fusion reactor devices
journal, May 2006
- Mirnov, S. V.; Azizov, E. A.; Evtikhin, V. A.
- Plasma Physics and Controlled Fusion, Vol. 48, Issue 6
Effects of temperature and surface contamination on D retention in ultrathin Li films on TZM
journal, August 2015
- Capece, A. M.; Roszell, J. P.; Skinner, C. H.
- Journal of Nuclear Materials, Vol. 463
Liquid-metal plasma-facing component research on the National Spherical Torus Experiment
journal, November 2013
- Jaworski, M. A.; Khodak, A.; Kaita, R.
- Plasma Physics and Controlled Fusion, Vol. 55, Issue 12
Design of purification loop and traps for the IFMIF/EVEDA Li Test Loop: Design of cold trap
journal, October 2011
- Kondo, H.; Furukawa, T.; Hirakawa, Y.
- Fusion Engineering and Design, Vol. 86, Issue 9-11
Actively convected liquid metal divertor
journal, October 2014
- Shimada, Michiya; Hirooka, Yoshi
- Nuclear Fusion, Vol. 54, Issue 12
Thermocapillary and thermoelectric effects in liquid lithium plasma facing components
journal, June 2009
- Jaworski, M. A.; Morley, N. B.; Ruzic, D. N.
- Journal of Nuclear Materials, Vol. 390-391
Influence of nonmetallic elements on the compatibility of structural materials with liquid alkali metals
journal, April 1983
- Natesan, K.
- Journal of Nuclear Materials, Vol. 115, Issue 2-3
Liquid lithium applications for solving challenging fusion reactor issues and NSTX-U contributions
journal, April 2017
- Ono, M.; Jaworski, M. A.; Kaita, R.
- Fusion Engineering and Design, Vol. 117
Laboratory experiments of uptake and release of hydrogen isotopes in liquid lithium
journal, August 2015
- Oyarzabal, E.; Martin-Rojo, A. B.; Tabarés, F. L.
- Journal of Nuclear Materials, Vol. 463
Overview of the physics and engineering design of NSTX upgrade
journal, July 2012
- Menard, J. E.; Gerhardt, S.; Bell, M.
- Nuclear Fusion, Vol. 52, Issue 8
First observations of ELM triggering by injected lithium granules in EAST
journal, September 2013
- Mansfield, D. K.; Roquemore, A. L.; Carroll, T.
- Nuclear Fusion, Vol. 53, Issue 11
Works referencing / citing this record:
Flow of a thin liquid-metal film in a toroidal magnetic field
journal, March 2019
- Lunz, D.; Howell, P. D.
- Journal of Fluid Mechanics, Vol. 867
Endangered elements, critical raw materials and conflict minerals
journal, November 2019
- Rhodes, Christopher J.
- Science Progress, Vol. 102, Issue 4