When concrete in nuclear vessel is exposed to high temperature, it is important to lower the temperature inside through cooling down of water supply outside. In this study, concrete thermal coefficient variation is evaluated with adding steel powder and magnetite aggregate. Considering the volume replacement of sand and coarse aggregate, 9 cases of mix conditions are prepared. The more volume of magnetite aggregate concrete has, the higher thermal coefficient is evaluated in nuclear concrete. Furthermore, steel powder is evaluated to be effective for increase thermal coefficient.

• 권성준(한남대학교 건설시스템공학과 조교수, 공학박사) | Kwon, Seung-Jun
• 김민규(KAERI 책임연구원, 공학박사) | Kim, Min Kyu
• 김성준(한남대학교 건설시스템공학과 석사과정) | Kim, Seong Jun