UN-UB2 Composite fuel material; improved water tolerance with integral burnable absorber
As part of a scoping study to investigate the initial feasibility of UN-UB2 composites, pellets of 5, 25 and 50% UB2 within UN were produced via Spark Plasma Sintering alongside a high density UN material. The pellets were seen to have a well-formed and dense microstructure which did not appear to c...
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Published in | Journal of nuclear materials Vol. 559; p. 1 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.02.2022
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | As part of a scoping study to investigate the initial feasibility of UN-UB2 composites, pellets of 5, 25 and 50% UB2 within UN were produced via Spark Plasma Sintering alongside a high density UN material. The pellets were seen to have a well-formed and dense microstructure which did not appear to change after annealing for 24 hours at 1273 K, which consisted of UN, UB2 and a UBN phase, with an additional UB0.1N0.9 phase suggested via EBSD. Steam exposure in an STA demonstrated that an increase in reaction onset temperature of approximately 150 K can be achieved via the addition of 25% UB2, and an increase of 120 K in onset temperature was evident in pellets containing only 5% UB2. High density UN was tested alongside these composites and behaved similarly, but microstructural examination of composites post-oxidation suggest that the oxidation rate is retarded in porous regions in addition to highly dense regions. |
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ISSN: | 0022-3115 1873-4820 |
DOI: | 10.1016/j.jnucmat.2021.153471 |