Arbeiter, Frederik

Klimenko, Dmitry

Pasler, Volker

Schlindwein, Georg

von der Weth, Axel

English

Weth, Axel von der

KITopen

Taking to service and first results of the Q-PETE/D2 hydrogen permeation setup   Frederik Arbeiter, Dmitry Klimenko, Volker Pasler, Georg Schlindwein, Axel von der Weth  Karlsruhe Institute of Technology, Karlsruhe (KIT), Germany *Corresponding author : frederik.arbeiter@kit.edu    The Q-PETE hydrogen permeation setup has been developed to (i) provide validation cases for DEMO HCPB (Helium Cooled Pebble Bed) breeder-zone relevant cases of hydrogen permeation, and (ii) to derive hydrogen transport properties of the purge gas contacting structural materials like ferritic-martensitic 9%-Cr steels and austenitic steels. The experiment features two gas-purged chambers separated by a membrane (made from the material under test), an experimental control periphery (with supply of hydrogen-containing feed gas and hydrogen-free sweep gas), as well as a quadrupole mass spectrometer for time-resolved measurement of hydrogen species concentration. Analysis of the time-dependent concentration signals provides insight to the involved hydrogen transport processes. In the reported first series of experiments, a 1.2 mm thick membrane of X2 CrNiMo 17-12-2 (316L) austenitic steel was used, which was also the material of the permeator chambers. Experiments were performed at several temperatures and purge gas conditions in the blanket-relevant range. The experimental results (time constants, permeation levels and species distribution) are discussed and compared to numerical simulation results. An iterative procedure was applied to derive the hydrogen transport properties for the used austenitic steel.  Acknowledgments: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Keywords: Hydrogen, Tritium, Breeder, Permeation, Diffusion, Solubility, Experiment Topic Category  Models and Experiments for FNT Presentation Preference Poster Presentation   

Taking to service and first results of the Q-PETE/D2 hydrogen permeation setup

KIT – The Research University in the Helmholtz AssociationObservationsThe Ion-current signal I(m/z=4) (D2) follows the expected evolutionThe signal at I(m/z=3) (HD expected) is not proportional to I(m/z=4): It peaks during the rise time of I(m/z=4) and saturates on lower levelFor repeated experiments at 400 °C, 300 sccm, thediffusion/permeation degraded noticeably. (Membrane surfacedarkened probably due to a trace hydrogen carbon)Derived diffusion and permeation data agree well with the rangefound in literature.Background and ObjectiveThe experiment “Q-PETE/D2” representative for the situation in the Helium Cooled Pebble Bed breeding zone (flowing purge gas with ~400Pa hydrogen) and suitable for validation of relevant tritium transport codes has been constructed and taken to service. In a temperature controlled setup a hydrogen loaded feed gas is directed over a steel membrane into which it can permeate. On the other side of the membrane a sweep gas flow collects the permeated hydrogen and transports it to a gas analysis (QMS) for quantitative time resolved detection. Institute for Neutron Physics and Reactor TechnologyContact: Dr.-Ing. Frederik Arbeiter <f.arbe@kit.edu>Taking to Service and First Results of the Q-PETE/D2 Hydrogen Permeation SetupFrederik Arbeiter, D. Klimenko, G. Schlindwein, V. Pasler, A. von der WethFirst experimental campaign 01/2019 - 07/2019Membrane made of 316L (X2 CrNiMo 17 12 2), thickness 1.14mmDeuterium concentration 3000 ppm, pressure 1400 mbar abs.Temperatures between 300 and 550 °C, 85 documented runs.Schematic flow and instrumentation diagram of Q-PETEQuadrupole MassSpectrometer“QQ“: species with twohydrogen atoms, like D2ArInstallation of Q-PETE/D2 at KIT-INR HELOKA-LP facilityMultiple Ion Detection (MID) data, Q-PETE RUN045 (316L, 400°C)Experiment repetitions at 400 °C, 300 sccm (show degradation)Mass spectrum (Scan 1-60) data, Q-PETE RUN045 (316L, 400°C)Variation of temperature: 400, 500°C )This work has been carried out within the framework of the EUROfusionConsortium and has received funding from the Euratom research andtraining programme 2014-2018 and 2019-2020 under grant agreementNo 633053. The views and opinions expressed herein do not necessarilyreflect those of the European Commission.

https://publikationen.bibliothek.kit.edu/1000092117/24127102

Taking to service and first results of the Q-PETE/D2 hydrogen permeation setup

Abstract

Similar works

Full text

Available Versions

KITopen

KITopen