Preliminary numerical study on thermal impact of runaway electrons to limiter PFU in fusion reactor

IF 2.7 2区 物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY
Siyao Wang , Xinyuan Qian , Xuebing Peng
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引用次数: 0

Abstract

Runaway electrons (RE) generated during unmitigated Major Disruptions (MDs) pose a significant threat to Plasma-Facing Components (PFCs) in fusion reactor. The highly energetic RE retain a large fraction of the plasma’s magnetic energy, and can penetrate the First Wall (FW), potentially damaging internal structures, even causing coolant leakage accidents. Understanding the interaction and damage mechanism between RE and FW will help design FW to resist RE impact. In this study, numerical simulations are conducted to investigate the thermal impact of RE on the FW of limiter based on thickened Monoblock structure under fusion reactor conditions, with particular focus on component damage in the RE beam peak region and the factors affecting the RE beam energy deposition. The results indicate that current plasma-facing units (PFUs) of limiter is highly susceptible to damage under the impact of runaway electron beam in fusion reactors. Nevertheless, by controlling the angle between the FW and the magnetic field lines and reducing the energy of the RE beam, the extent of damage to the limiter can be effectively controlled.
核聚变反应堆中失控电子对限制器PFU热影响的初步数值研究
在未缓解的大干扰(MDs)过程中产生的失控电子(RE)对核聚变反应堆中的面向等离子体元件(pfc)构成了重大威胁。高能RE保留了大部分等离子体的磁能,可以穿透第一壁(FW),潜在地破坏内部结构,甚至导致冷却剂泄漏事故。了解RE和FW之间的相互作用和损伤机理,有助于设计出抗RE冲击的FW。本研究通过数值模拟研究了核聚变条件下基于加厚单块结构的RE对限制器FW的热影响,重点研究了RE束峰值区域的构件损伤以及影响RE束能量沉积的因素。结果表明,在失控电子束的冲击下,限流器的电流等离子体面单元(PFUs)极易受到损伤。然而,通过控制FW与磁力线的夹角,降低RE束流的能量,可以有效地控制限幅器的损坏程度。
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
Nuclear Materials and Energy
Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)
CiteScore
3.70
自引率
15.40%
发文量
175
审稿时长
20 weeks
期刊介绍: The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.
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