Electromagnetic transients simulation using a shell approach for ITER cCXRS upper port plug due to plasma vertical displacement events

Белов, А. В.; Gapionok, E.; Gornikel, I.; Kukhtin, V.; Lamzin, E.; Neubauer, O.; Sytchevsky, S.

doi:10.1016/j.fusengdes.2011.05.001

Cited by 8 publications

(14 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In simulations of the components located far away of the halo current inlets/outlets, a rough description is suitable [33]. For the components located near the halo current inlets/outlets a detailed model is required with an extensive description of the current variations in space and time [34].…”

Section: Sources Of Transient Fields In Itermentioning

confidence: 99%

Global computational models for analysis of electromagnetic transients to support ITER tokamak design and optimization

Amoskov¹,

Arslanova²,

Белов³

et al. 2012

Fusion Engineering and Design

View full text Add to dashboard Cite

Section: Sources Of Transient Fields In Itermentioning

confidence: 99%

Global computational models for analysis of electromagnetic transients to support ITER tokamak design and optimization

Amoskov¹,

Arslanova²,

Белов³

et al. 2012

Fusion Engineering and Design

View full text Add to dashboard Cite

“…For VDEs or AVDEs occurring with relatively longer CQ time, some components of EM loads reach their extremes during the CQ phase, while other load components do peak after plasma termination. Proof can be seen in patterns of currents in the VV, in graphs of coil currents delivered by plasma evolution codes, e.g., [1,2,[8][9][10], or in graphs of net EM loads acting on the VV and the Magnets obtained with detailed EM post-processing models, e.g., [11][12][13], as well as in this article. The above explanation for a rather early EM interaction between the VV and the Magnets was highlighted by one of the authors of this paper a long time ago in a course of VDE simulations on 2D and 2.5D tokamak models [1].…”

Section: Introductionmentioning

confidence: 96%

“…Typically, MD or VDE scenarios delivered by a trusted plasma simulation code serve then as inputs for 3D post-processing with specialized EM codes, e.g., [11][12][13]. The latter produces detailed time-dependent maps of eddy currents and EM force densities for all major tokamak systems as a basis for further engineering analyses.…”

Section: Introductionmentioning

confidence: 99%

Practical Model for the Calculation of Lateral Electromagnetic Loads in Tokamaks at Asymmetric Vertical Displacement Events (AVDEs)

Sadakov,

Villone,

Iglesias

et al. 2024

Plasma

View full text Add to dashboard Cite

This paper describes a new practical numerical model for the calculation of lateral electromagnetic (EM) loads in tokamaks during asymmetric vertical displacement events (AVDEs). The model combines key features of two recently reported trial models while avoiding their drawbacks. Their common basic feature is the superposition of two patterns of halo current: one perfectly symmetric and another perfectly anti-symmetric. This model combines the following features that have not been combined before (a) a helically distorted halo layer wrapping around core plasma, and (b) halo-to-wall interception belts slipping along plasma-facing walls. This combination almost doubles the lateral net forces. An AVDE creates significant lateral net moments. Being relatively modest at VDEs, the lateral moments become a dominant component of EM loads at AVDEs. The model carefully tracks the balance of net EM loads (zero total for the tokamak), as a necessary condition for the consequent numerical simulation of the tokamak’s dynamic response. This balance is needed as well for the development of tokamak monitoring algorithms and simulators. In order to decouple from the current uncertainties in the interpretation and simulation of AVDE physics, the model does not simulate AVDE evolution but uses it as an input assumption based on the existing interpretation and simulation of AVDE physics. This means the model is to be used in a manner of parametric study, at widely varied input assumptions on AVDE evolution and severity. Parametric results will fill a library of ready-for-use waveforms of asymmetric EM loads (distributed and total) at tokamak structures and coils, so that the physics community may point to specific variants for subsequent engineering analysis. This article presents the first practical contribution to this AVDE library.

show abstract

“…Under the assumption that halo current is equivalent to a 'power-supply load,' research has been conducted on the EU-DEMO and ITER to investigate the load effects of halo current. These effects vary significantly due to the distinct electrical structures of these devices [24][25][26][27]. Consequently, when considering the EM load contribution of halo current, understanding its path within in-vessel components becomes of paramount importance [21].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic load evaluating and optimizing approach of the blanket system during VDEs considering halo current

Lei,

Liu,

et al. 2023

Nucl. Fusion

View full text Add to dashboard Cite

In most scenarios, the vertical displacement event (VDE) represents the most extreme electromagnetic (EM) event within the tokamak device. The significant EM loads experienced during this event have the potential to compromise the structural stability of in-vessel components. This study investigates the EM loads on the water-cooled ceramic breeder (WCCB) blanket system of China Fusion Engineering Test Reactor (CFETR) using finite element analysis methods in two characteristic events: hot-VDE and cold-VDE. The study discusses the EM load effects resulting from changes in magnetic flux and induced electromotive force, respectively, with a specific focus on halo currents. The results reveal that, with similar current quech time, the difference in EM load on the blanket system during the VDEs primarily depends on the halo currents. When the electrical connection of the back supporting structure (BSS) is open, the halo current path within the blanket system and vacuum vessel (VV) changes, and a substantial portion of the halo current in the blanket system is conducted to the VV via the BSS. Consequently, a portion of the EM load on the blankets and BSS is transferred to the VV due to the transfer of halo current. Inspired by this, the conceptual use of “shunts” is proposed to provide a dedicated circuit for shunting halo currents away from critical device components, such as the VV and blankets. This approach allows for the sharing of EM loads caused by halo currents and reduces the threat posed by halo currents to the structural integrity of these essential components.

show abstract

Electromagnetic transients simulation using a shell approach for ITER cCXRS upper port plug due to plasma vertical displacement events

Cited by 8 publications

References 4 publications

Global computational models for analysis of electromagnetic transients to support ITER tokamak design and optimization

Global computational models for analysis of electromagnetic transients to support ITER tokamak design and optimization

Practical Model for the Calculation of Lateral Electromagnetic Loads in Tokamaks at Asymmetric Vertical Displacement Events (AVDEs)

Electromagnetic load evaluating and optimizing approach of the blanket system during VDEs considering halo current

Contact Info

Product

Resources

About