Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (1): 10601-010601.doi: 10.11889/j.0253-3219.2017.hjs.40.010601

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Experimental investigation and CFD simulation of reflooding in narrow rectangle channel

JI Jianye1, XU Wei1, CHAI Xiang1, LIU Xiaojing1, ZENG Wei2   

  1. 1 Shanghai Jiao Tong University, Shanghai 200240, China;
    2 Nuclear Power Institute of China, Chengdu 610041, China
  • Received:2016-11-01 Revised:2016-11-28 Online:2017-01-10 Published:2017-01-11
  • Supported by:

    Supported by National Natural Science Foundation of China (No.11275178)

Abstract:

Background: Reflooding phenomenon plays an important role in nuclear reactor accident. During reflooding phase, the water level will rise from the bottom to the top with quenching the hot fuel rods, which is the most important phase to guarantee the integrity of cladding. Purpose: The aim is to predict the heat transfer in reflooding phenomenon and to investigate the initial conditions effect on the temperature variance. Methods: The experiments and numerical method were carried out to obtain the temperature variance. The THERMAL facility was built and the computational fluid dynamics (CFD) software CFX was used during the study. Results: The experiment data shows that the wall initial temperature has a big influence on the quench velocity and rewet temperature. After the comparison with the numerical simulation, the numerical model was validated. Through the numerical simulation, the relationship between inlet velocity and wall temperature was received. Conclusion: It can be concluded that the CFD method can be used to predict the heat transfer in reflooding phenomenon. And some of the heat transfer models need to be improved to improve the accuracy.

Key words: Two fluid model, Reflooding, Rectangle channel, Fluid solid coupled

CLC Number: 

  • TL3