On stability of spatial distributions of crystal structure defects in irradiated high burnup UO2 fuel

Autor:	V.G. Zborovskii, V.V. Likhanskii
Rok vydání:	2006
Předmět:	Nuclear and High Energy Physics Chemistry Radiochemistry Uranium dioxide Pellets Mechanics Crystallographic defect Instability Grain size chemistry.chemical_compound Nuclear Energy and Engineering General Materials Science Irradiation Dislocation Burnup
Zdroj:	Journal of Nuclear Materials. 350:1-8
ISSN:	0022-3115
DOI:	10.1016/j.jnucmat.2005.11.005
Popis:	Conditions of Kinoshita instability development of point defects and dislocation spatial distributions in the crystal structure of UO 2 fuel are studied. As a result of the instability development, spatially non-uniform regions with increased dislocation density are formed. Closed-form expressions of instability increment and spatial scale are derived. Parameters of the instability for irradiation conditions of high burnup UO 2 fuel are obtained by means of numerical simulation. Instability development time is shown to be inversely proportional to fission rate and it increases as dislocation density decreases. Calculated values of instability spatial scale and increment are in accordance with the size of fine grains and their formation rate in the peripheral zones of high burnup LWR fuel pellets.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5ca05ae0bcaaebc931a147db14e1a17a https://doi.org/10.1016/j.jnucmat.2005.11.005 Zobrazit plný text záznamu Full Text from ScienceDirect