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http://dx.doi.org/10.1016/j.net.2017.09.003

Investigation of flow regime in debris bed formation behavior with nonspherical particles  

Cheng, Songbai (Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University)
Gong, Pengfeng (Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University)
Wang, Shixian (Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University)
Cui, Jinjiang (Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University)
Qian, Yujia (Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University)
Zhang, Ting (Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University)
Jiang, Guangyu (Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University)
Publication Information
Nuclear Engineering and Technology / v.50, no.1, 2018 , pp. 43-53 More about this Journal
Abstract
It is important to clarify the characteristics of flow regimes underlying the debris bed formation behavior that might be encountered in core disruptive accidents of sodium-cooled fast reactors. Although in our previous publications, by applying dimensional analysis technique, an empirical model, with its reasonability confirmed over a variety of parametric conditions, has been successfully developed to predict the regime transition and final bed geometry formed, so far this model is restricted to predictions of debris mixtures composed of spherical particles. Focusing on this aspect, in this study a new series of experiments using nonspherical particles have been conducted. Based on the knowledge and data obtained, an extension scheme is suggested with the purpose of extending the base model to cover the particle-shape influence. Through detailed analyses and given our current range of experimental conditions, it is found that, by coupling the base model with this scheme, respectable agreement between experiments and model predictions for the regime transition can be achieved for both spherical and nonspherical particles. Knowledge and evidence from our work might be utilized for the future improvement of design of an in-vessel core catcher as well as the development and verification of sodium-cooled fast reactor severe accident analysis codes in China.
Keywords
Core Disruptive Accident; Debris Bed Formation; Flow Regime; Nonspherical Particles; Sodium-cooled Fast Reactor;
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