Effective Thermal Conductivity and Diffusivity of Containment Wall for Nuclear Power Plant OPR1000

Nuclear Engineering and Technology

Hyun Sun Park¹  Hyung Gyun Noh¹  Hie Chan Kang²  Jong Hwi Lee² 

[1] Division of Advanced Nuclear Engineering (DANE), Pohang University of Science and Technology (POSTECH), 30, Jigok-ro 127 beon-gil, Nam-gu, Pohang-si, Gyeongsangbuk-do 37673, Republic of Korea;Mechanical Engineering Division, Kunsan National University (KNU), 558, Daehak-ro, Gunsan-si, Jeollabuk-do 54150, Republic of Korea;

关键词: Containment Wall;    Thermal Conductivity;    Thermal Diffusivity;    Reinforced Concrete;    Severe Accident;   

DOI  :  10.1016/j.net.2016.10.010

来源: DOAJ

【 摘 要 】

The goal of this study is to evaluate the effective thermal conductivity and diffusivity of containment walls as heat sinks or passive cooling systems during nuclear power plant (NPP) accidents. Containment walls consist of steel reinforced concrete, steel liners, and tendons, and provide the main thermal resistance of the heat sinks, which varies with the volume fraction and geometric alignment of the rebar and tendons, as well as the temperature and chemical composition. The target geometry for the containment walls of this work is the standard Korean NPP OPR1000. Sample tests and numerical simulations are conducted to verify the correlations for models with different densities of concrete, volume fractions, and alignments of steel. Estimation of the effective thermal conductivity and diffusivity of the containment wall models is proposed. The Maxwell model and modified Rayleigh volume fraction model employed in the present work predict the experiment and finite volume method (FVM) results well. The effective thermal conductivity and diffusivity of the containment walls are summarized as functions of density, temperature, and the volume fraction of steel for the analysis of the NPP accidents.

【 授权许可】

Unknown