首页|UN-UB 2 Composite fuel material; improved water tolerance with integral burnable absorber
UN-UB 2 Composite fuel material; improved water tolerance with integral burnable absorber
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NSTL
Elsevier
As part of a scoping study to investigate the initial feasibility of UN-UB 2 composites, pellets of 5, 25 and 50 % UB 2 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, UB 2 and a UBN phase, with an additional UB 0 . 1 N 0 . 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 % UB 2 , and an increase of 120 K in onset temperature was evident in pellets containing only 5 % UB 2 . High density UN was tested alongside these composites and behaved similarly, but microstructural examination of composites postoxidation suggest that the oxidation rate is retarded in porous regions in addition to highly dense regions. (c) 2021 Elsevier B.V. All rights reserved.
NuclearFuelUraniumHigh density fuelsNitrideBorideENHANCED THERMAL-CONDUCTIVITYURANIUM-DIOXIDEPELLETS
Turner, J.、Buckley, J.、Worth, R. N.、Salata-Barnett, M.、Schmidt, M. J. J.、Abram, T. J.
NSTL
Elsevier
