Microstructural Analysis of Irradiated UO<sub>2</sub> Dispersed Fuel during High Temperature Failure

WU Xiaoyong; WANG Fei; WEN Bang

Mar. 2025

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WU Xiaoyong, WANG Fei, WEN Bang. Microstructural Analysis of Irradiated UO2 Dispersed Fuel during High Temperature Failure[J]. Nuclear Power Engineering, 2012, 33(1): 74-77.

Citation:

WU Xiaoyong, WANG Fei, WEN Bang. Microstructural Analysis of Irradiated UO₂ Dispersed Fuel during High Temperature Failure[J]. Nuclear Power Engineering, 2012, 33(1): 74-77.

WU Xiaoyong, WANG Fei, WEN Bang. Microstructural Analysis of Irradiated UO2 Dispersed Fuel during High Temperature Failure[J]. Nuclear Power Engineering, 2012, 33(1): 74-77.

Citation:

WU Xiaoyong, WANG Fei, WEN Bang. Microstructural Analysis of Irradiated UO₂ Dispersed Fuel during High Temperature Failure[J]. Nuclear Power Engineering, 2012, 33(1): 74-77.

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Microstructural Analysis of Irradiated UO₂ Dispersed Fuel during High Temperature Failure

National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2011-02-20
Rev Recd Date: 2011-11-30

Available Online: 2025-03-08

Abstract

Abstract

The blister annealing has been performed on UO₂ dispersed fuel plate under various tempera-ture conditions.The microstructure of UO₂ particles changing with the rise of temperature is studied by using the microscope.Fission gas releases at high temperature and the bubbles burst the coat to generate cracks and result in the local fracture and fall off of UO₂ particles.A lot of holes occur in the reaction layer outside of UO₂ coat because of the diffusion reaction intensified by the high temperature.
- Dispersed fuel,
- Irradiation,
- High temperature failure,
- Microstructure