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The role of UC inclusions in the development of fission gas bubble superlattice neutron-irradiated monolithic U-10Mo fuels

Journal Article · · Journal of Nuclear Materials
Uranium Carbide (UC) inclusions are the most prevalent impurities in Uranium-Molybdenum (U-Mo) fuel and are considered undesirable because they could potentially affect fuel performance. This work revealed that, like grain boundaries (gBs), UC inclusions could help facilitate the formation of the fission gas bubble superlattice (GBS). The GBS is a highly organized complex defect structure that can effectively store fission gases, thereby inhibiting fuel swelling. Transmission electron microscopy (TEM) showed that GBS self-organization can initiate at the UC/U-Mo interfaces in U-10Mo fuel irradiated to low fission density. Furthermore, this study also revealed that the UC boundary in U-10Mo irradiated to low fission density is wavy and periodic in morphology and that GBS formation is semi-coherent with the UC boundary. Because the initiation of GBS occurs at gBs and UC/U-Mo interfaces, the fission gas inventory is always highest at those regions compared to the U-Mo grain interior. Consequently, at higher fission densities, it is likely that high burnup structure (HBS) development via grain refinement will begin at gBs and UC/U-Mo interfaces.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
2000473
Alternate ID(s):
OSTI ID: 2000171
Report Number(s):
INL/JOU--22-69537-Rev000
Journal Information:
Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 581; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (22)

Grain boundary engineering to control the discontinuous precipitation in multicomponent U10Mo alloy journal June 2018
Unveiling the interaction of nanopatterned void superlattices with irradiation cascades journal October 2022
Delayed onset of discontinuous precipitation-based phase transformation in U10Mo alloys doped with Silicon journal November 2022
Transmission electron microscopy investigation of irradiated U–7wt%Mo dispersion fuel journal April 2008
Transmission electron microscopy characterization of irradiated U–7Mo/Al–2Si dispersion fuel journal January 2010
TEM characterization of U–7Mo/Al–2Si dispersion fuel irradiated to intermediate and high fission densities journal May 2012
Transmission electron microscopy characterization of the fission gas bubble superlattice in irradiated U–7 wt%Mo dispersion fuels journal March 2015
Thermal stability of fission gas bubble superlattice in irradiated U–10Mo fuel journal September 2015
High burn-up structure of U(Mo) dispersion fuel journal August 2016
Formation mechanism of gas bubble superlattice in UMo metal fuels: Phase-field modeling investigation journal October 2016
Mechanical properties examined by nanoindentation for selected phases relevant to the development of monolithic uranium-molybdenum metallic fuels journal April 2017
Microstructural characterization of an irradiated RERTR-6 U-7Mo/AA4043 alloy dispersion fuel plate specimen blister-tested to a final temperature of 500 °C journal May 2017
Thermal stability of helium bubble superlattice in Mo under TEM in-situ heating journal July 2018
Microstructural characterization of as-fabricated and irradiated U-Mo fuel using SEM/EBSD journal October 2018
Crystallographic and compositional analysis of impurity phase U2MoSi2C in UMo alloys journal June 2019
Evaluating the microstructure and origin of nonmetallic inclusions in as-cast U-10Mo fuel journal October 2021
A short review of defect superlattice formation in metals and alloys under irradiation journal February 2022
High burnup structure formation in U-Mo fuels journal May 2022
Microstructural anomalies in hot-isostatic pressed U–10 wt.% Mo fuel plates with Zr diffusion barrier journal May 2015
Formation and self-organization of void superlattices under irradiation: A phase field study journal September 2018
Texture Analyses and Microstructural Evolution in Irradiated Monolithic U-Mo Nuclear Fuel journal July 2020
IRRADIATION PERFORMANCE OF U-Mo MONOLITHIC FUEL journal April 2014

Figures / Tables (8)