High-dose neutron irradiation of beryllium and titanium beryllide: Summary and outlook
Chakin V. Rolli R. Schneider H.-C. Gaisin R. Vladimirov P. Klimenkov M. Duerrschnabel M. Zimber N. Rieth M. Gorr B. Hernández F.A. Radloff D. Fedorov A. Zmitko M. Nakamichi M. Udartsev S.
March 2025Elsevier Ltd
Nuclear Materials and Energy
2025#42
The irradiation experiment conducted in the HFR material testing reactor, under conditions simulating the operating environment of the DEMO breeding blanket, along with subsequent post-irradiation examinations (PIEs) of irradiated beryllium-based materials—such as pure beryllium and titanium beryllide—enabled a comparative analysis of their radiation resistance for potential use as neutron multipliers. The PIEs clearly demonstrated the superiority of titanium beryllide over beryllium, particularly in terms of reduced swelling, lower tritium retention, and enhanced mechanical properties at elevated temperatures. As a result, titanium beryllide blocks have been proposed to replace beryllium pebbles in the Helium-Cooled Pebble Bed (HCPB) DEMO breeding blanket design. A production technology for fabricating titanium beryllide blocks was successfully developed, and further advancements in this technology, along with research on full-scale blocks, have been outlined.
Beryllium pebbles , DEMO breeding blanket , Helium-cooled pebble bed , Neutron multiplier , Titanium beryllide
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Karlsruhe Institute of Technology, Institute for Applied Materials, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
Karlsruhe Institute of Technology, Institute for Neutron Physics and Reactor Technology, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
Karlsruhe Institute of Technology, Nuclear Fusion Programme, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
Nuclear Research & Consultancy Group, Noord-Holland, Arnhem, Netherlands
Fusion for Energy, c/ Josep Pla, n° 2, Torres Diagonal Litoral Edificio B3, Barcelona, 08019, Spain
Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, 2-166, Omotedate, Obuchi, Rokkasho, Aomori, 039-3212, Japan
Ulba Metallurgical Plant, Abay Avenue 102, Ust-Kamenogorsk, 070005, Kazakhstan
Karlsruhe Institute of Technology
Karlsruhe Institute of Technology
Karlsruhe Institute of Technology
Nuclear Research & Consultancy Group
Fusion for Energy
Quantum and Radiological Science and Technology
Ulba Metallurgical Plant
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