2.6 MeV Proton Irradiation Effects on the Surface Integrity of Depleted UO2
- Univ. of Wisconsin-Madison, Madison, WI (United States). Dept. of Engineering Physics
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Purdue Univ., West Lafayette, IN (United States). School of Nuclear Engineering
The effect of low temperature proton irradiation in depleted uranium dioxide was examined as a function of fluence. With 2.6 MeV protons, the fluence limit for preserving a good surface quality was found to be relatively low, about 1.4 and 7.0 x 1017 protons/cm2 for single and poly crystalline samples, respectively. Upon increasing the fluence above this threshold, severe surface flaking and disintegration of samples was observed. Based on scanning electron microscopy (SEM) and X-ray diffraction (XRD) observations the causes of surface failure were associated to high H atomic percent at the peak damage region due to low solubility of H in UO2. The resulting lattice stress is believed to exceed the fracture stress of the crystal at the observed fluencies. The oxygen point defects from the displacement damage may hinder the H diffusion and further increase the lattice stress, especially at the peak damage region.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- DOE - SC
- DOE Contract Number:
- DE-AC07-05ID14517
- OSTI ID:
- 1120809
- Report Number(s):
- INL/JOU-13-30694; TRN: US1400358
- Journal Information:
- Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, Vol. 319; ISSN 0168-583X
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
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