Title: Safety research of porous media cooling for pressurised-water reactor

Authors: Youya Song; Cheng Peng; Heshan Wei

Addresses: College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China ' College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China ' College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, China

Abstract: In this paper, the in-pile debris bed will simplify into a radial stratification porous media model. After comparing the influences of the debris bed thickness, porosity and the stratified structure of the porous media on the pressure drop, it is found that the porosity has a relatively significant effect. Meanwhile, when the porosity changes from 0.395 to 0.366, the drop of pressure in the fluid flowing through the porous medium increases by about twice. When the bed thickness changes from 600 to 1000 mm, the pressure drop increases by about 66%. In modelling the boiling of a fluid in a porous medium under assumed core melting, the pressure drop of the inhomogeneous structure can be 1.51 times larger than that in the uniform one. However, this minor change in porosity ratio has a smaller effect on both the outlet temperature and velocity, and the change in that is about 2%.

Keywords: porous media; stratification; pressure drop; flow resistance; phase change.

DOI: 10.1504/IJNEST.2023.136779

International Journal of Nuclear Energy Science and Technology, 2023 Vol.16 No.4, pp.282 - 296

Received: 17 Mar 2023
Accepted: 13 Oct 2023
Published online: 21 Feb 2024 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article