Effect of metal layer height on heat transfer inside molten pool
Author:
Liu Chang1ORCID, Ma Pengfei1, Liu Hui1, Liu Yan1, Zhao Danting1, Lei Yudian1, Zhou Yuxuan1, Xue Jiyuan1, Huang Zijing12, Cao Liuxuan12
Affiliation:
1. College of Energy , Xiamen University , Xiamen , Fujian 361005 , P. R. China 2. Fujian Research Center for Nuclear Engineering , Xiamen , Fujian 361005 , P. R. China
Abstract
Abstract
In a serious accident, after the core of a nuclear reactor melts and collapses, In-Vessel Retention in the External Reactor Vessel Cooling (IVR-ERVC) is an effective technology to maintain the integrity of lower head by reducing heat load on it. The various factors affecting the melting of the lower head have been widely studied. The mass of the molten metal layer may affect the consequences of the accident, since it is where the focusing effect occurs. However, the related research is still absent. In this paper, we systematically calculated the heat transfer behavior and melting process under different metal layer heights conditions. The temperature distribution, the velocity distribution, the heat flux of the outer wall of the Reactor Pressure Vessel (RPV), and the change of the thickness of the RPV were obtained through Large Eddy Simulation (LES). Interestingly, the heat flux increases with the metal layer height at first and achieve the maximum in the middle height. These results increase the understanding towards the serious accidents.
Funder
XMU Training Program of Innovation and Entrepreneurship for Undergraduates National Natural Science Foundation of China
Publisher
Walter de Gruyter GmbH
Subject
Safety, Risk, Reliability and Quality,General Materials Science,Nuclear Energy and Engineering,Nuclear and High Energy Physics,Radiation
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