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All Journal Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir
Saga Octadamailah
Pusat Riset Teknologi Bahan Nuklir dan Limbah Radioaktif BRIN

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ANALYSIS OF DENSITY, PHASE, AND MICROSTRUCTURE IN U–Mo ALLOYS Saga Octadamailah; Ganisa Kurniati Suryaman; Supardjo Supardjo; Deni Mustika; Juan Carlos Sihotang; Yusuf Gigih Wicaksono; Slamet Pribadi; Boybul; Anissa Isnaini; Ratih Langenati; Dede Sutarya
Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol. 31 No. 1 (2025): Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/urania.2025.10793

Abstract

The performance of research reactors heavily depends on the intensity of the neutron flux produced, which is a key factor in reactor efficiency and effectiveness. To enhance the performance of research reactors, high-density fuel is required to increase neutron flux in the reactor core, enabling optimal irradiation processes. One of the most promising fuel candidates is uranium-molybdenum (U-Mo) alloy. This study aims to investigate the properties of U-Mo alloys through a series of characterizations, including density measurements, phase analysis using X-ray Diffraction (XRD), and microstructural observations using a Scanning Electron Microscope (SEM). The density measurements revealed values close to theoretical calculations, with densities of 17.423 g/cm³ for U-7Mo, 17.292 g/cm³ for U-8Mo, and 17.229 g/cm³ for U-9Mo. XRD analysis identified the presence of the γ-U phase with a body-centered cubic (bcc) crystal structure, characterized by diffraction peaks at 2θ angles of 37°, 53°, 66°, and 78°. SEM observations showed a pattern of bright and dark areas, which were further analyzed using Energy Dispersive Spectroscopy (EDS). EDS analysis indicated that the bright areas had a higher concentration of Mo and a lower oxide content compared to the dark areas. These findings suggest that the addition of Mo not only improves the structural homogeneity but also enhances the oxidation resistance of U-Mo alloys.
Co-Authors Anissa Isnaini Boybul Dede Sutarya Deni Mustika Ganisa Kurniati Suryaman Juan Carlos Sihotang Ratih Langenati Slamet Pribadi Supardjo Supardjo Yusuf Gigih Wicaksono