Operational aspects of the JET tritium introduction modules
Operational aspects of the JET tritium introduction modules
复制标题
JET 氚引入模块的操作方面
DOI：
10.1016/j.fusengdes.2017.03.069
复制
发表时间：
2017
期刊：
影响因子：
5.8
通讯作者：
S. Medley
中科院分区：
文献类型：
--
作者：
I. Carvalho;David Wilson;T. Keenan;R. Felton;E. Belonohy;J. Banks;S. Omolayo;A. Sips;D. Price;P. Camp;S. Knipe;S. Medley
作为支持 ITER 的 JET 计划的一部分，JET 计划开展纯氚 (TT) 燃料和氘氚 (DT) 混合物的活动。与以前的 DT 活动不同，需要更高的氚流量，特别是在 TT 操作期间。将安装五个由主动气体处理系统（AGHS）供给的氚引入模块（TIM）；三个位于偏滤器区域，一个位于中平面，另一个位于机器顶部。选择 TIM 位置、设计和操作特性，以便大多数现有的氘实验可以在氚中复制。TIM 的目的是向 JET 机器提供精确控制数量的氚，这是通过控制压电阀开度来实现的。这些控制阀位于储库容积之后，其中含有低于大气压的氚（最初充电至~800 mbar）。 VAT Vacuumvalves AG 开发的原型压电阀需要 160 µm 的行程，阀孔面积为 5.2 mm2。这些阀门目前正在进行测试，目的是在 800 mbar 的氚气下提供 1.6 bar.l/s 的最大流量。本文提供了统计数据来证明操作要求的合理性，并详细介绍了 TIM 设计（包括操作顺序）。
As part of the JET Programme in Support for ITER, campaigns with pure Tritium (TT) fuel and Deuterium-Tritium (DT) mixtures are planned at JET. Unlike previous DT campaigns a much higher tritium flow rate, particularly during TT operation, is required. Five Tritium Introduction Modules (TIMs), fed from the Active Gas Handling System (AGHS), are to be installed; three in the divertor region, one in the mid-plane and another at the top of the machine. The selected TIM locations, the design and operational characteristics, were chosen so that most of the existing deuterium experiments can be replicated in tritium.The purpose of the TIMs is to supply precisely controlled quantities of tritium to the JET machine and this is achieved by controlling the piezoelectric valve openings. These control valves are located after the reservoir volumes, which contain tritium at sub-atmospheric pressure (charged initially to ∼800 mbar). Prototype piezoelectric valves developed by VAT Vacuumvalves AG, require an estimated stroke of 160 μm for the valve orifice area of 5.2 mm2. These valves are at present being tested, with the aim of delivering a maximum flow of 1.6 bar.l/s with tritium at 800 mbar.This paper presents statistics to justify the operational requirements and details the TIM design including the operation sequence.