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(ITERP1/20) Beryllium Interaction with Steam or Air in ITER under Accident Conditions

K. McCarthy¹, R. Anderl¹, H.-W. Bartels², A. Chekhonadskikh³, D. Davydov⁴, B. Kolbasov⁵, S. Morozov², D. Petti¹, V. Shestakov⁶, G. Smolik¹, I. Tazhibaeva⁶, A. Vurim³

¹ Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, Idaho, USA
² ITER Joint Central Team (JCT), San Diego, CA, USA
³ Institute of Atomic Energy of the Kazakstan National Nuclear Center (KNNC), Kurchatov, Republic of Kazakstan
⁴ Bochvar All-Russian Research Institute of Inorganic Materials (VNIINM), Moscow, Russia
⁵ Russian Research Center ``Kurchatov Institute'' (Nuclear Fusion Institute), Moscow, Russia
⁶ Scientific Research Institute of Experimental and Theoretical Physics of the Al'-Farabi Kazakstan State National University, Almaty, Republic of Kazakstan

Abstract.  The combined use of beryllium as plasma facing material and water as coolant in ITER (International Thermonuclear Experimental Reactor) poses the potential risk of significant hydrogen production under accident conditions. In this paper we describe on-going R&D at several different institutions worldwide to understand the beryllium/steam and beryllium/air interactions for the ITER design. Our understanding of beryllium chemical reactivity has progressed significantly during the ITER EDA (Engineering Design Activity), allowing us to more accurately assess ITER postulated accidents. We include a brief description of how these data were used in our modeling activities for the safety analysis of ITER.

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