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Modeling of In, Tl, Ga, Sb, and Pd as lanthanides binding agents in U-Zr metallic nuclear fuels

Published online by Cambridge University Press:  18 May 2012

Guillermo Bozzolo ,
Abdellatif M. Yacout ,
Gerard L. Hofman  and
H. O. Mosca
Guillermo Bozzolo
Affiliation:
Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL, 60439 U.S.A.
Abdellatif M. Yacout
Affiliation:
Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL, 60439 U.S.A.
Gerard L. Hofman
Affiliation:
Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL, 60439 U.S.A.
H. O. Mosca
Affiliation:
Gerencia de Investigaciones y Aplicaciones, CAC, Comisión Nacional de Energía Atómica, San Martín, Buenos Aires, Argentina
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Abstract

Atomistic modeling is used to study the role of different alloying additions to metallic U-Zr nuclear fuels in terms of their ability to reduce lanthanide migration to the outer surface of the fuel and thus reduce their interaction with cladding. The Bozzolo-Ferrante-Smith (BFS) method for alloys is used to examine the behavior of each addition, the resulting phase structure, and the evolution of the fuel surface. Different behaviors are observed for each of the additives (In, Tl, Ga, Sb, Pd), all a result of the competition between the formation of bulk precipitates and the tendency of each additive to segregate to the surface. For each case, characteristic temperatures are determined indicating the range of temperatures in which each additive performs a different role. Sb and Pd additives are determined to be the most effective additions, properly balancing their ability to bind lanthanides in the fuel with their own segregating tendencies.

Keywords

lanthanidenuclear materialssimulation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1444: Symposium S/Y – Actinides and Nuclear Energy Materials , 2012 , mrss12-1444-s09-09
Copyright
Copyright © Materials Research Society 2012

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References

REFERENCES

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