NSUF - Nuclear Science User Facilities

Pavel Medvedev

Profile Information
Name
Pavel Medvedev
Institution
Idaho National Laboratory
Publications:
"In-Pile Irradiation Induced Defects and the Effect on Thermal Diffusivity of MgO" Pavel Medvedev, Brandon Miller, Donald Moore, Juan Nino, Cynthia Adkins, Journal of Nuclear Materials Vol. 434 2013 90-96 Link
The effects of neutron irradiation temperature and dose on thermal diffusivity are investigated by comparing non-irradiated and in-pile irradiated MgO samples. MgO pellets were irradiated in-pile of the Advanced Test Reactor at Idaho National Laboratory. Samples were irradiated at 623 and 973 K to fast neutron fluences of ~1 x 1025 (1.5 dpa) and ~2 x 1025 n/m2 (3 dpa). Post irradiation examination included X-ray diffraction, scanning electron microscopy, laser flash thermal diffusivity, and transmission electron microscopy. Neutron irradiation of MgO causes a significant reduction in the thermal diffusivity (46 to 72% at room temperature) due to irradiation-induced defects. The radiation induced thermophysical and structural evolution of MgO is reported.

About Us

The Nuclear Science User Facilities (NSUF) is the U.S. Department of Energy Office of Nuclear Energy's only designated nuclear energy user facility. Through peer-reviewed proposal processes, the NSUF provides researchers access to neutron, ion, and gamma irradiations, post-irradiation examination and beamline capabilities at Idaho National Laboratory and a diverse mix of university, national laboratory and industry partner institutions.

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