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Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.01 vteřin. 
Performance of Composite Nuclear Fuels during Normal Operation and Nuclear Reactor Accidents
 Foral, Štěpán ; Valach,, Mojmír (oponent) ; Haščík,, Ján (oponent) ; Katovský, Karel (vedoucí práce)
This work deals with the domain of composite fuels based on standard UO2 . Several candidate materials for dopants are listed in the work and they are compared from different points of view. The UO2 + SiC fuel option is selected for detail analysis. It was found that this fuel option shows good behavior during steady state operation. The Fission Gas Release is lower together with mechanical load. Nevertheless, new models of the composite behavior need to be developed. The analysis of LOCA-type accident reveals that the UO2 + SiC fuel option shows slightly better behavior compared with UO2 . The fuel centerline temperatures is lower and the mechanical loading is lower as well. On the other hand, the analysis of RIA accident revealed possible issues. For example, the increased thermal conductivity was likely the root of higher peak cladding temperature and consequent increased departure from nucleate boiling. This finding is very likely to be find by all UO2 based fuels with thermal conductivity increased by dopant. The work was supported by the CANUT project, reg. No. 2012TE01020455
Úplný záznam
Performance of Composite Nuclear Fuels during Normal Operation and Nuclear Reactor Accidents
 Foral, Štěpán ; Valach,, Mojmír (oponent) ; Haščík,, Ján (oponent) ; Katovský, Karel (vedoucí práce)
This work deals with the domain of composite fuels based on standard UO2 . Several candidate materials for dopants are listed in the work and they are compared from different points of view. The UO2 + SiC fuel option is selected for detail analysis. It was found that this fuel option shows good behavior during steady state operation. The Fission Gas Release is lower together with mechanical load. Nevertheless, new models of the composite behavior need to be developed. The analysis of LOCA-type accident reveals that the UO2 + SiC fuel option shows slightly better behavior compared with UO2 . The fuel centerline temperatures is lower and the mechanical loading is lower as well. On the other hand, the analysis of RIA accident revealed possible issues. For example, the increased thermal conductivity was likely the root of higher peak cladding temperature and consequent increased departure from nucleate boiling. This finding is very likely to be find by all UO2 based fuels with thermal conductivity increased by dopant. The work was supported by the CANUT project, reg. No. 2012TE01020455
Úplný záznam

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