期刊
NUCLEAR ENGINEERING AND DESIGN
卷 397, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.nucengdes.2022.111941
关键词
Ex-vessel debris bed coolability; Reactor material; Porous bed; Poly-distributed particle bed; Single-phase pressure drop; Two-phase pressure drop
资金
- National Research Foundation of Korea (NRF) - Korea government (Ministry of Science and ICT) [2017M2A8A4015274]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean government (Ministry of Trade, Industry, and Energy) [20193110100090]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20193110100090] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study analyzed the basic characteristics of non-explosive TROI particles and conducted single-and two-phase pressure drop experiments in the particle bed. The Ergun model with an effective diameter of 1 mm predicted single-phase pressure drop results accurately, while the Schmidt and Schulenberg & Muller models with effective diameters of 3 mm and 2 mm respectively predicted two-phase pressure drop results well. The effects of particle bed characteristics on pressure drop were also discussed, and a modified pressure drop model reflecting the measured porosity was proposed.
When a severe accident with reactor vessel failure occurs, molten core material can be released from the reactor vessel to the reactor cavity. According to a pre-flooding strategy, molten core material are released into the pre -flooded cavity and fragmentized into fine particles. Then, a particulate debris bed can be formed at the bottom of the cavity. Penetration of the coolant into the debris bed is important to ensure long term coolability of the debris bed, which is closely related to the two-phase flow pressure drop characteristics of the porous debris bed. This study analyzed the basic characteristics of non-explosive TROI (Test for Real cOrium Interaction with water) particles collected from steam explosion tests with reactor materials and then conducted single-and two-phase pressure drop experiments in the non-explosive TROI particle bed. Based on an analysis of the experimental data with existing pressure drop models, we found that the Ergun model with an effective diameter of 1 mm predicted single-phase pressure drop results most precisely and the Schmidt model with an effective diameter of 3 mm and the Schulenberg & Muller model with an effective diameter of 2 mm predicted the two-phase pressure drop results well. In addition, this paper discusses in detail the effects of the TROI particulate bed characteristics, irregularity, polydispersity and high porosity on pressure drop characteristics. Accordingly, the paper suggests a modified two-phase pressure drop model reflecting the measured porosity in the TROI bed particle.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据