Concepts of inert-matrix fuels for americium transmutation are discussed. It is demonstrated that a 'hybrid' fuel design, consisting in a dispersion of an americium-bearing phase in an inert matrix, is desirable. More than a solid-solution is preferred in order to localise within a small volume the damage in the matrix due to fission fragments. Such a dispersion is composed of spherical inclusions (between 50 and 300 mu m) of an americium host phase in a dense inert matrix. For an oxide fuel, we recommend the solid solution (Zr,Am)O-2, possibly stabilised by yttrium as the host phase. For a nitride fuel, (Zr,Am)N is proposed. MgO and MgAl2O4 (oxide fuel), as well as TiN and ZrN (nitride fuel) are the most likely candidates for the inert matrix. Recommendations are also given for the research required to optimise the concept. (C) 1999 Elsevier Science B.V. All rights reserved.
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European Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
D'Agata, E.
Hania, P. R.
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Nucl Res & Consultancy Grp, Dept Life Cycle & Innovat, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Hania, P. R.
Bejaoui, S.
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DEC CEA Cadarache, Commissariat Energie Atom & Energies Alternat, F-13108 St Paul Les Durance, FranceEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Bejaoui, S.
Sciolla, C.
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Nucl Res & Consultancy Grp, Dept Life Cycle & Innovat, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Sciolla, C.
Wyatt, T.
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Nucl Res & Consultancy Grp, Dept Life Cycle & Innovat, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Wyatt, T.
Hannink, M. H. C.
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Nucl Res & Consultancy Grp, Dept Life Cycle & Innovat, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Hannink, M. H. C.
Herlet, N.
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DTEC CEA Marcoule, Commissariat Energie Atom & Energies Alternat, F-30207 Bagnols Sur Ceze, FranceEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Herlet, N.
Jankowiak, A.
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DMN CEA Saclay, Commissariat Energie Atom & Energies Alternat, F-91190 Gif Sur Yvette, FranceEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Jankowiak, A.
Klaassen, F. C.
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Nucl Res & Consultancy Grp, Dept Life Cycle & Innovat, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Klaassen, F. C.
Lapetite, J-M.
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European Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Lapetite, J-M.
Boomstra, D. A.
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Nucl Res & Consultancy Grp, Dept Life Cycle & Innovat, NL-1755 ZG Petten, NetherlandsEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Boomstra, D. A.
Phelip, M.
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DEC CEA Cadarache, Commissariat Energie Atom & Energies Alternat, F-13108 St Paul Les Durance, FranceEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands
Phelip, M.
Delage, F.
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DEC CEA Cadarache, Commissariat Energie Atom & Energies Alternat, F-13108 St Paul Les Durance, FranceEuropean Commiss, Joint Res Ctr, Inst Energy, NL-1755 ZG Petten, Netherlands