Preparation and analysis of helium purge gas mixture to be used in Tritium Extraction System of LLCB TBM

10th Asia Plasma and Fusion Association Conference

Gayathri Devi, V.^1 ; Yadav, Deepak^1 ; Sircar, Amit^1

Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar

382428, India^1

关键词: Ceramic breeder;    Control mechanism;    Detailed design;    Experimental set up;    Helium purge;    Hydrogen isotope;    Test blanket module;    Tritium extraction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/823/1/012053/pdf
DOI  :  10.1088/1742-6596/823/1/012053

来源: IOP

【 摘 要 】

Hydrogen isotopes are extracted from the Ceramic Breeder (CB) and liquid Lead Lithium (Pb-Li) breeder of Lead Lithium Ceramic Breeder (LLCB) Test Blanket Module (TBM) with Helium purge gas. 1000 ppm of hydrogen gas is mixed with the purge helium gas to facilitate improved extraction of hydrogen isotopes from the breeder zones by hydrogen swamping reactions [1]. An experimental set up is developed for making up the purge gas mixture with a composition similar to the purge gas composition to be used for extraction of hydrogen isotopes from CB and Pb-Li of LLCB TBM. This is achieved by introducing different ppm levels (1000 - 5000 ppm) of hydrogen in helium gas by flow control mechanism. The analysis of the purge gas mixture is performed using a highly sensitive Gas Chromatography (GC) system. This paper describes the detailed design of the experimental set-up and results for the analysis of different concentrations of hydrogen in helium purge gas.