Mechanical properties degradation of Cr-coated cladding under the loss-of-coolant accident conditions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00375476" target="_blank" >RIV/68407700:21220/21:00375476 - isvavai.cz</a>
Result on the web
<a href="https://publikationen.bibliothek.kit.edu/1000141824" target="_blank" >https://publikationen.bibliothek.kit.edu/1000141824</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Mechanical properties degradation of Cr-coated cladding under the loss-of-coolant accident conditions
Original language description
Development of nuclear fuels with enhanced accident tolerance is one of the main current objectives of researchers around the world. The contribution focuses on Cr-coated cladding concept developed in cooperation of UJP Praha a.s. and CTU in Prague. Presented results show highly protective behavior of thin Cr-layers against high temperature steam oxidation and improved mechanical ductility of samples after transients. A more complex approach to simulate LOCA transient is applied in presented study. A set of experiments was performed to understand with the behavior of Cr-coated claddings during the whole phenomena. The presented results show the influence of coatings on high-temperature creep, ballooning size, time to burst, cracking of coating, high temperature oxidation through cracked and intact coating. Secondary oxidation and hydriding from inner uncoated surface after cladding failure is discussed as well. Microhardness and microstructure analysis of the material after testing revealed local cladding damage. The mechanical properties of cladding after LOCA can locally deteriorate due to cracks in coating, but the influence on the bulk mechanical behavior of the whole fuel cladding needs to be further investigated.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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