Electromagnetic model for finite element analyses of plasma disruption events used in the design phase of the COMPASS-U tokamak

Jakub Hromadka; Josef Havlicek; Nisarg Patel; Vadim Yanovskiy; Karel Patocka; Jan Prevratil; Martin Imrisek; Fabien Jaulmes; Arthur Brooks; Peter Titus; Vojtech Balner; David Sestak; Radomir Panek

doi:10.1016/j.fusengdes.2021.112369

Electromagnetic model for finite element analyses of plasma disruption events used in the design phase of the COMPASS-U tokamak

Jakub Hromadka, Josef Havlicek, Nisarg Patel, Vadim Yanovskiy, Karel Patocka, Jan Prevratil, Martin Imrisek, Fabien Jaulmes, Arthur Brooks, Peter Titus, Vojtech Balner, David Sestak, Radomir Panek

PPPL Engineering

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

9 Scopus citations

Abstract

Large electromagnetic forces acting on the vacuum vessel and passive stabilizing plates of the COMPASS-U tokamak (R = 0.894 m, a = 0.27 m, B_T ≤ 5 T, I_P ≤ 2 MA) due to disruption events are expected during its operation. An electromagnetic model based on the finite element method was developed using ANSYS software to determine the maximal possible forces on the vacuum vessel assembly that might occur. The effects of current quench, thermal quench, vertical displacement events and halo currents are all incorporated in the model. The toroidal eddy currents, the poloidal eddy currents (caused by thermal and current quench) and the poloidal halo current are taken into account. The model predicts that the induced toroidal current can reach the value up to 1.33 MA in the vacuum vessel shell and the value up to 0.52 MA in the passive stabilizing plates. Vertical force up to 4.1 MN acting on the entire vacuum vessel assembly can be expected and force up to 2 MN acting on the stabilizing plates, in particular. The results of the presented electromagnetic model are part of the load specification for the mechanical design of the vacuum vessel assembly of the COMPASS-U tokamak.

Original language	English (US)
Article number	112369
Journal	Fusion Engineering and Design
Volume	167
DOIs	https://doi.org/10.1016/j.fusengdes.2021.112369
State	Published - Jun 2021

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Nuclear Energy and Engineering
General Materials Science
Mechanical Engineering

Keywords

ANSYS
COMPASS-U
Current quench
Electromagnetic model
Finite element analysis
Halo current
Passive stabilizing plates
Plasma disruptions
Thermal quench
Vacuum vessel
Vertical displacement event

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10.1016/j.fusengdes.2021.112369

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Hromadka, J., Havlicek, J., Patel, N., Yanovskiy, V., Patocka, K., Prevratil, J., Imrisek, M., Jaulmes, F., Brooks, A., Titus, P., Balner, V., Sestak, D., & Panek, R. (2021). Electromagnetic model for finite element analyses of plasma disruption events used in the design phase of the COMPASS-U tokamak. Fusion Engineering and Design, 167, Article 112369. https://doi.org/10.1016/j.fusengdes.2021.112369

@article{c28b0bb8b35449de93718d28a39963a2,

title = "Electromagnetic model for finite element analyses of plasma disruption events used in the design phase of the COMPASS-U tokamak",

abstract = "Large electromagnetic forces acting on the vacuum vessel and passive stabilizing plates of the COMPASS-U tokamak (R = 0.894 m, a = 0.27 m, BT ≤ 5 T, IP ≤ 2 MA) due to disruption events are expected during its operation. An electromagnetic model based on the finite element method was developed using ANSYS software to determine the maximal possible forces on the vacuum vessel assembly that might occur. The effects of current quench, thermal quench, vertical displacement events and halo currents are all incorporated in the model. The toroidal eddy currents, the poloidal eddy currents (caused by thermal and current quench) and the poloidal halo current are taken into account. The model predicts that the induced toroidal current can reach the value up to 1.33 MA in the vacuum vessel shell and the value up to 0.52 MA in the passive stabilizing plates. Vertical force up to 4.1 MN acting on the entire vacuum vessel assembly can be expected and force up to 2 MN acting on the stabilizing plates, in particular. The results of the presented electromagnetic model are part of the load specification for the mechanical design of the vacuum vessel assembly of the COMPASS-U tokamak.",

keywords = "ANSYS, COMPASS-U, Current quench, Electromagnetic model, Finite element analysis, Halo current, Passive stabilizing plates, Plasma disruptions, Thermal quench, Vacuum vessel, Vertical displacement event",

author = "Jakub Hromadka and Josef Havlicek and Nisarg Patel and Vadim Yanovskiy and Karel Patocka and Jan Prevratil and Martin Imrisek and Fabien Jaulmes and Arthur Brooks and Peter Titus and Vojtech Balner and David Sestak and Radomir Panek",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = jun,

doi = "10.1016/j.fusengdes.2021.112369",

language = "English (US)",

volume = "167",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier B.V.",

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Hromadka, J, Havlicek, J, Patel, N, Yanovskiy, V, Patocka, K, Prevratil, J, Imrisek, M, Jaulmes, F, Brooks, A, Titus, P, Balner, V, Sestak, D & Panek, R 2021, 'Electromagnetic model for finite element analyses of plasma disruption events used in the design phase of the COMPASS-U tokamak', Fusion Engineering and Design, vol. 167, 112369. https://doi.org/10.1016/j.fusengdes.2021.112369

TY - JOUR

T1 - Electromagnetic model for finite element analyses of plasma disruption events used in the design phase of the COMPASS-U tokamak

AU - Hromadka, Jakub

AU - Havlicek, Josef

AU - Patel, Nisarg

AU - Yanovskiy, Vadim

AU - Patocka, Karel

AU - Prevratil, Jan

AU - Imrisek, Martin

AU - Jaulmes, Fabien

AU - Brooks, Arthur

AU - Titus, Peter

AU - Balner, Vojtech

AU - Sestak, David

AU - Panek, Radomir

PY - 2021/6

Y1 - 2021/6

N2 - Large electromagnetic forces acting on the vacuum vessel and passive stabilizing plates of the COMPASS-U tokamak (R = 0.894 m, a = 0.27 m, BT ≤ 5 T, IP ≤ 2 MA) due to disruption events are expected during its operation. An electromagnetic model based on the finite element method was developed using ANSYS software to determine the maximal possible forces on the vacuum vessel assembly that might occur. The effects of current quench, thermal quench, vertical displacement events and halo currents are all incorporated in the model. The toroidal eddy currents, the poloidal eddy currents (caused by thermal and current quench) and the poloidal halo current are taken into account. The model predicts that the induced toroidal current can reach the value up to 1.33 MA in the vacuum vessel shell and the value up to 0.52 MA in the passive stabilizing plates. Vertical force up to 4.1 MN acting on the entire vacuum vessel assembly can be expected and force up to 2 MN acting on the stabilizing plates, in particular. The results of the presented electromagnetic model are part of the load specification for the mechanical design of the vacuum vessel assembly of the COMPASS-U tokamak.

AB - Large electromagnetic forces acting on the vacuum vessel and passive stabilizing plates of the COMPASS-U tokamak (R = 0.894 m, a = 0.27 m, BT ≤ 5 T, IP ≤ 2 MA) due to disruption events are expected during its operation. An electromagnetic model based on the finite element method was developed using ANSYS software to determine the maximal possible forces on the vacuum vessel assembly that might occur. The effects of current quench, thermal quench, vertical displacement events and halo currents are all incorporated in the model. The toroidal eddy currents, the poloidal eddy currents (caused by thermal and current quench) and the poloidal halo current are taken into account. The model predicts that the induced toroidal current can reach the value up to 1.33 MA in the vacuum vessel shell and the value up to 0.52 MA in the passive stabilizing plates. Vertical force up to 4.1 MN acting on the entire vacuum vessel assembly can be expected and force up to 2 MN acting on the stabilizing plates, in particular. The results of the presented electromagnetic model are part of the load specification for the mechanical design of the vacuum vessel assembly of the COMPASS-U tokamak.

KW - ANSYS

KW - COMPASS-U

KW - Current quench

KW - Electromagnetic model

KW - Finite element analysis

KW - Halo current

KW - Passive stabilizing plates

KW - Plasma disruptions

KW - Thermal quench

KW - Vacuum vessel

KW - Vertical displacement event

UR - https://www.scopus.com/pages/publications/85101674121

UR - https://www.scopus.com/inward/citedby.url?scp=85101674121&partnerID=8YFLogxK

U2 - 10.1016/j.fusengdes.2021.112369

DO - 10.1016/j.fusengdes.2021.112369

M3 - Article

AN - SCOPUS:85101674121

SN - 0920-3796

VL - 167

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

M1 - 112369

ER -

Electromagnetic model for finite element analyses of plasma disruption events used in the design phase of the COMPASS-U tokamak

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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