Plasma-Wall Interaction for Irradiated Tungsten and Tungsten Alloys in Fusion Devices

First Research Coordination Meeting, IAEA Headquarters, Vienna, 26-28 November 2013

Agenda and Presentations

Tuesday 26 November


Opening

09:30-10:00 Welcome by Section Head Robin Forrest on behalf of Division Director Meera Venkatesh. Introduction of participants.
10:00-10:30 Bas Braams, IAEA: Review of CRP and meeting objectives. Review of agenda. Administrative matters.

Session I. Chair: Shishir Deshpande

10:30-11:00 Yuji Hatano, Toyama University: Hydrogen isotope retention in neutron-irradiated tungsten and tungsten alloys.
11:00-11:15 Break.
11:15-11:45 Masashi Shimada, Idaho National Laboratory: Tritium behavior in neutron-irradiated tungsten using TPE divertor plasma simulator and TMAP mass transport code.
11:45-12:30 Bernard Unterberg and Jochen Linke, Forschungszentrum Jόlich: Radiation induced degradation of tungsten grades under thermal and plasma exposure and development of advanced tungsten materials.

Session II. Chair: Mizuki Sakamoto

14:00-14:30 Chonghong Zhang, IPP-CAS, Hefei: Effect of high energy ion irradiation damages on deuterium permeation and retention in tungsten.
14:30-15:00 Akira Hasegawa, Tohoku University: Effects of neutron irradiation on damage structure evolution of tungsten in fusion device.
15:00-15:45 Shishir Deshpande and P. M. Raole, IPR, Gandhinagar: Radiation damage and H/D retention studies on ion-irradiated tungsten and its alloys - experiments and modeling.
15:45-16:00 Break.
16:00-16:30 Christian Grisolia, CEA: Quantification of tritium implantation in tungsten-based fusion materials.
16:30-17:00 Matej Mayer, IPP Garching: Deuterium retention in tungsten damaged by high-energetic tungsten ions.

Wednesday 27 November


Session III. Chair: Guang Hong Lu

09:00-09:30 Boris Khripunov, Kurchatov Institute, Moscow: High flux plasma effect on tungsten damaged by high energy ions.
09:30-10:00 Primoz Pelicon, Microanalytical Center, Department for Low and Medium Energy Physics, Josef Stefan Institute, Ljubljana: Hydrogen retention in self-damaged and He irradiated tungsten and alloys for PFC.
10:00-10:30 Mizuki Sakamoto, Plasma Research Center, University of Tsukuba: Microstructure and hydrogen isotope retention in tungsten with radiation induced defects.
10:30-10:45 Break.
10:45-11:15 Yury Gasparyan, National Research Nuclear University "MEPhI", Moscow: Thermal desorption of deuterium from damaged tungsten: experiments and calculations.
11:15-11:45 Jean-Paul Allain, University of Illinois: Research and plans on irradiated tungsten at the University of Illinois Center for Plasma-Material Interactions.
11:45-12:15 Takeshi Hirai, ITER: Tungsten in ITER; status report.

Session IV. Chair: Masashi Shimada

14:00-14:30 Changsong Liu, ISSP-CAS, Hefei: DFT study of H-vacancy/O/C complexes and MD+MS study of interactions of vacancy and interstitial with the grain boundary.
14:30-15:00 Takuji Oda, Seoul National University: Evaluation of tritium inventory in irradiated tungsten by atomic-scale modeling.
15:00-15:30 Guang-Hong Lu, Computational Materials Physics Group, School of Physics and Nuclear Engineering, Beihang University, Beijing: Modeling and simulation of behaviours of hydrogen, helium and their synergy in irradiated tungsten.
15:30-16:00 Break.
16:00-16:30 Sergei Dudarev, CCFE, Abingdon: Gas desorption from irradiated tungsten under radiation-induced swelling conditions.
16:30-17:00 Brian D. Wirth, University of Tennessee, Knoxville (presented by J.-P. Allain): Plasma surface interactions in tungsten involving He.
17:00-17:30 Charlotte Becquart, University of Lille-1, and Marie-France Barthe, CNRS (presented by Christian Grisolia): Modeling and experimental validation of hydrogen behaviour in tungsten for tokamak.

Thursday 28 November


Session V

09:00-10:15 Discussion led by A. Hasegawa and J. P. Allain: Production and characterization of damage; experiments and supporting modelling. Review of main problems to be addressed in the course of the CRP.
10:15-10:30 Break.
10:30-11:45 Discussion led by Y. Hatano and M. Mayer: Hydrogen (tritium) retention in damaged tungsten; experiments and supporting modelling. Review of main problems to be addressed in the course of the CRP.

Session VI

13:15-14:30 Discussion led by S. Dudarev and G.-H. Lu: Fundamental modelling and its connection to experiments. Review of main problems to be addressed in the course of the CRP.
14:30-14:45 Break.
14:45-16:30 All: Review of expected outputs of the CRP and of individual contributions; plans for coordination; plans for Second RCM in Q2 or Q3 of 2015.

Group photo, Tuesday 26 November 2013.

(Higher resolution images here.)