Development of a systematic, self-consistent algorithm for the K-DEMO steady-state operation scenario

J. S. Kang; J. M. Park; L. Jung; S. K. Kim; J. Wang; C. Y. Lee; D. H. Na; K. Im; Y. S. Na; Y. S. Hwang

doi:10.1088/1741-4326/aa7072

Development of a systematic, self-consistent algorithm for the K-DEMO steady-state operation scenario

J. S. Kang, J. M. Park, L. Jung, S. K. Kim, J. Wang, C. Y. Lee, D. H. Na, K. Im, Y. S. Na, Y. S. Hwang

Plasma Theory and Modeling

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

An optimum plasma pressure/current density profile and corresponding heating/current drive (H/CD) determination scheme is newly developed by integrating equilibrium, stability, confinement, and H/CD, self-consistently subject to maximize the fusion gain for Korean fusion demonstration reactor (K-DEMO) steady-state operation scenarios. The integrated plasma modeling package, FASTRAN/IPS, is adopted for the integrated numerical apparatus. The target pressure profile with a pedestal structure is investigated by varying its peaking, pedestal height and width as a first step. Formation of stable equilibria is evaluated by solving the Grad-Shafranov equation and checking linear MHD stability. For the case of potentially stable equilibrium, required external heating distribution is calculated by considering both power balance and external current drive alignment to reproduce the pressure profile of the stable equilibrium. Electron/ion temperature and poloidal flux evolutions are solved with the derived heating configuration to find a steady-state scenario and achieve self-consistent plasma profiles. A self-consistent target steady-state pressure and current profile parameters are proposed through designed systematic algorithm with fusion power P_F = 2070 MW, fusion gain Q = 19.7, and normalized beta β_N = 2.8 at toroidal field B_T = 7.4 T and plasma current I_P = 15.5 MA. Feasibility of fusion power P_F = 3000 MW operation is also explored with enhanced density and temperature limit assumption.

Original language	English
Article number	126034
Journal	Nuclear Fusion
Volume	57
Issue number	12
DOIs	https://doi.org/10.1088/1741-4326/aa7072
State	Published - Sep 27 2017

Funding

This work was supported by the R&D Program through the National Fusion Research Institute of Korea (NFRI) funded by the Government funds. This work was supported by the Office of Science of the US Department of Energy under Contract No. DE-AC05-00OR22725. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the US Department of Energy under Contract No. DE-AC02-05CH11231. This research was supported by National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014M1A7A1A03045368).

Funders	Funder number
National Fusion Research Institute of Korea
U.S. Department of Energy	DE-AC05-00OR22725
Office of Science	DE-AC02-05CH11231
Ministry of Science, ICT and Future Planning	2014M1A7A1A03045368
National Research Foundation of Korea

Keywords

FASTRAN
K-DEMO
integrated modeling
self-consistent algorithm
steady-state scenario

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1088/1741-4326/aa7072

Cite this

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title = "Development of a systematic, self-consistent algorithm for the K-DEMO steady-state operation scenario",

abstract = "An optimum plasma pressure/current density profile and corresponding heating/current drive (H/CD) determination scheme is newly developed by integrating equilibrium, stability, confinement, and H/CD, self-consistently subject to maximize the fusion gain for Korean fusion demonstration reactor (K-DEMO) steady-state operation scenarios. The integrated plasma modeling package, FASTRAN/IPS, is adopted for the integrated numerical apparatus. The target pressure profile with a pedestal structure is investigated by varying its peaking, pedestal height and width as a first step. Formation of stable equilibria is evaluated by solving the Grad-Shafranov equation and checking linear MHD stability. For the case of potentially stable equilibrium, required external heating distribution is calculated by considering both power balance and external current drive alignment to reproduce the pressure profile of the stable equilibrium. Electron/ion temperature and poloidal flux evolutions are solved with the derived heating configuration to find a steady-state scenario and achieve self-consistent plasma profiles. A self-consistent target steady-state pressure and current profile parameters are proposed through designed systematic algorithm with fusion power PF = 2070 MW, fusion gain Q = 19.7, and normalized beta βN = 2.8 at toroidal field BT = 7.4 T and plasma current IP = 15.5 MA. Feasibility of fusion power PF = 3000 MW operation is also explored with enhanced density and temperature limit assumption.",

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author = "Kang, {J. S.} and Park, {J. M.} and L. Jung and Kim, {S. K.} and J. Wang and Lee, {C. Y.} and Na, {D. H.} and K. Im and Na, {Y. S.} and Hwang, {Y. S.}",

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AU - Lee, C. Y.

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AB - An optimum plasma pressure/current density profile and corresponding heating/current drive (H/CD) determination scheme is newly developed by integrating equilibrium, stability, confinement, and H/CD, self-consistently subject to maximize the fusion gain for Korean fusion demonstration reactor (K-DEMO) steady-state operation scenarios. The integrated plasma modeling package, FASTRAN/IPS, is adopted for the integrated numerical apparatus. The target pressure profile with a pedestal structure is investigated by varying its peaking, pedestal height and width as a first step. Formation of stable equilibria is evaluated by solving the Grad-Shafranov equation and checking linear MHD stability. For the case of potentially stable equilibrium, required external heating distribution is calculated by considering both power balance and external current drive alignment to reproduce the pressure profile of the stable equilibrium. Electron/ion temperature and poloidal flux evolutions are solved with the derived heating configuration to find a steady-state scenario and achieve self-consistent plasma profiles. A self-consistent target steady-state pressure and current profile parameters are proposed through designed systematic algorithm with fusion power PF = 2070 MW, fusion gain Q = 19.7, and normalized beta βN = 2.8 at toroidal field BT = 7.4 T and plasma current IP = 15.5 MA. Feasibility of fusion power PF = 3000 MW operation is also explored with enhanced density and temperature limit assumption.

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KW - steady-state scenario

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Development of a systematic, self-consistent algorithm for the K-DEMO steady-state operation scenario

Abstract

Funding

Keywords

UN SDGs

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