Thermo-physical properties and transient heat transfer of concrete at elevated temperatures

摘要: Abstract The objective of this study is to produce our own experimental data physical properties domestic concrete used in Korean NPPs, and on the thermal behavior exposed high temperature conditions. compressive strength chemical composition Yonggwang NPP units 3 4 were analyzed. similar that US basaltic concrete. concrete, such as density, conductivity, diffusivity, specific heat also measured with a wide range 20–1100 °C. Most thermo-physical decrease an increase except for heat, particularly conductivity diffusivity are 50% lower at 900 °C compared values room temperature. increases until 500 °C, decreases from 700 900 °C, then again when above 900 °C. In work, we have performed CORCON analysis MCCI experiments simulate transient maximum downward flux specimen was estimated be about 2.1 MW m −2 erosion rate 175 cm h −1 depth 2 cm. analysis, it found compositions important effect upon erosion.