過酷事故時の溶融デブリによるコンクリートの熱劣化に関する研究
Investigation on thermal deterioration of concreate in severe accident
著者:
晴山 隆仁 Takahito HAREYAMA 奈良林 直 Tadashi NARABAYASHI 山本 泰功 Yasunori YAMAMOTO 千葉 豪 Go CHIBA 林 司 Tsukasa HAYASHI 今野 隆博 Takahiro KONNO
発刊日:
公開日:
ConcreateHigh temperatureMagnesia-Carbon brickThermal deteriorationVoid ratio
概要
In the Fukushima daiichi accident, molten core supposed to be leaked from the pressure vessel to the concreate floor in the containment vessel. To keep the integrity of the containment, development of small type of core catcher which can be installed in present nuclear power plant is needed. In this investigation, the thermal deterioration of concreate and Magnesia-Carbon brick was evaluated by the surface observation and the measurements of compressive strength, weight reduction, and difference of void ratio. In addition, permeability measurement for burned concreate was operated. The measurement ware conducted at room temperature. As a result, both of concreate and Magnesia-Carbon brick lost its weight, volume, and strength mostly relate with heating temperature. Permeability of concreate also decreases with increasing as heating temperature rise. Magnesia-carbon brick which heated over 800? showed more severe deterioration than concreate at the same temperature. Thermal deterioration of both material was observed.
