Failure Criterion of Cladding Oxide Layer in Dissolution Mechanism

Liu Lili; Yu Hongxing; Chen Liang; Deng Jian; Zhang Ming

doi:10.13832/j.jnpe.2015.S2.0116

Volume 36 Issue S2

Feb. 2025

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Liu Lili, Yu Hongxing, Chen Liang, Deng Jian, Zhang Ming. Failure Criterion of Cladding Oxide Layer in Dissolution Mechanism[J]. Nuclear Power Engineering, 2015, 36(S2): 116-121. doi: 10.13832/j.jnpe.2015.S2.0116

Citation:

Liu Lili, Yu Hongxing, Chen Liang, Deng Jian, Zhang Ming. Failure Criterion of Cladding Oxide Layer in Dissolution Mechanism[J]. Nuclear Power Engineering, 2015, 36(S2): 116-121. doi: 10.13832/j.jnpe.2015.S2.0116

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Failure Criterion of Cladding Oxide Layer in Dissolution Mechanism

doi: 10.13832/j.jnpe.2015.S2.0116

Science and Technology on Reactor System Design Technology, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2015-06-30
Rev Recd Date: 2015-10-20

Available Online: 2025-02-15

Abstract

Abstract

A new failure criterion of cladding oxide layer dissolved by molten zircaloy is given based on the kinetics of molten zircaloy dissolve UO₂ and ZrO₂ simultaneously and its load conditions. The criterion was successfully validated against FPT-0 test. For a given structure of the fuel rod in nuclear reactors, the failure criterion can be simplified by temperature, which is a function of oxide scale and heat-up rate of the cladding. The relocation of melt in the flow path will be influenced by the new criterion predictions concerning mass and composition of relocated U-Zr-O mixture.
- Failure criterion,
- Cladding oxide layer,
- Dissolution,
- Severe accident