Fission Gas Model for UO<sub>2</sub> Fuels Considering Bubble Coalescence and Grain Boundary Diffusion

CUI Yi; DING Shurong; ZHAO Yunmei; HUO Yongzhong; WANG Canglong; YANG Lei

Mar. 2025

Article Contents

Article Navigation > Nuclear Power Engineering > 2012 > 33(S2): 9-12,42

CUI Yi, DING Shurong, ZHAO Yunmei, HUO Yongzhong, WANG Canglong, YANG Lei. Fission Gas Model for UO2 Fuels Considering Bubble Coalescence and Grain Boundary Diffusion[J]. Nuclear Power Engineering, 2012, 33(S2): 9-12,42.

Citation:

CUI Yi, DING Shurong, ZHAO Yunmei, HUO Yongzhong, WANG Canglong, YANG Lei. Fission Gas Model for UO₂ Fuels Considering Bubble Coalescence and Grain Boundary Diffusion[J]. Nuclear Power Engineering, 2012, 33(S2): 9-12,42.

Citation:

PDF( 485 KB)

Fission Gas Model for UO₂ Fuels Considering Bubble Coalescence and Grain Boundary Diffusion

1. Department of Mechanics and Engineering Science, Fudan University, Shanghai, 200433, China;
2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

Received Date: 2012-10-15
Rev Recd Date: 2012-11-27

Available Online: 2025-03-08

Abstract

Abstract

Based on the modified Booth model,the micro-scale governing equations for both the fission gas release and the gaseous swelling are established,considering the grain boundary resolution,the inter-granular bubble coalescence,the intragranular gas diffusion and the effect of hydrostatic pressure.The nu-merical method for solving the governing equations is developed,and the code for predicting the behavior of the fission gas in the nuclear fuel is built.By comparing the numerical results with the experimental data,the model in this paper is validated.
- Fission gas,
- Grain boundary diffusion,
- Fission gas swelling,
- Fission gas release,