Electromagnetic analysis on ITER first wall samples diagnostic with sub-modelling technique

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-04-11 DOI:10.1016/j.fusengdes.2025.115058

I. Pagani , F. Lucca , G. Mariani , S. Iglesias , F. Penzel

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引用次数: 0

Abstract

The ITER First Wall Samples Diagnostic is designed to measure the erosion and fuel retention on the First Wall (FW), caused by the load of the Charge Exchange Neutral (CXN) particles.

Ensuring the structural integrity of the FW under extreme conditions is vital for the ITER Tokamak's performance, particularly during Major Disruptions (MD) and Vertical Disruption Events (VDE), which generate intense mechanical and electromagnetic stresses. To address these challenges, a comprehensive electromagnetic (EM) analysis was conducted using advanced Finite Element (FE) modeling techniques.

A key aspect of this study was the application of a sub-modelling technique that enabled precise calculation of EM loads on individual FWS components. By focusing on specific regions of interest, the sub-modelling approach provided more detailed insights into the forces and moments generated by Lorentz forces and the impact of halo currents during plasma disruptions. This method transferred electromagnetic data from a global model to localized sub-models, ensuring accurate load predictions while reducing computational complexity.

The results demonstrate that the sub-modelling approach accurately predicts the total forces and moments acting on the FW samples, particularly identifying radial forces and torques as the dominant stress factors. The analysis revealed that the sample adapter component experiences over 90 % of the total load. These findings are instrumental in guiding the design and improving the reliability of FWS diagnostics, ensuring their functionality and durability under ITER's extreme operating conditions.

This study highlights the effectiveness of integrating global and sub-modelling techniques for assessing complex loading scenarios, contributing to the optimization of ITER's diagnostic components.

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子模型技术在ITER首壁样品诊断中的电磁分析

ITER第一壁样品诊断被设计用于测量第一壁（FW）上的侵蚀和燃料保留，这是由电荷交换中性粒子（CXN）的负载引起的。在极端条件下确保FW的结构完整性对于ITER托卡马克的性能至关重要，特别是在产生强烈机械和电磁应力的大破坏（MD）和垂直破坏事件（VDE）期间。为了应对这些挑战，采用先进的有限元（FE）建模技术进行了全面的电磁（EM）分析。本研究的一个关键方面是应用子建模技术，该技术能够精确计算FWS各个部件上的电磁载荷。通过关注感兴趣的特定区域，子建模方法提供了更详细的见解，了解由洛伦兹力产生的力和力矩以及等离子体中断期间晕流的影响。该方法将电磁数据从全局模型转移到局部子模型，确保了准确的负荷预测，同时降低了计算复杂度。结果表明，子建模方法能准确地预测作用在FW样品上的总力和力矩，特别是径向力和扭矩是主要的应力因素。分析表明，样品适配器组件承受了总负载的90%以上。这些发现有助于指导设计和提高FWS诊断的可靠性，确保其在ITER极端运行条件下的功能和耐久性。本研究强调了整合全局和子建模技术来评估复杂加载情景的有效性，有助于ITER诊断组件的优化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fusion Engineering and Design 工程技术-核科学技术

CiteScore

3.50

自引率

23.50%

发文量

275

审稿时长

3.8 months

期刊介绍： The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.