シビアアクシデント時のＰＷＲ格納容器内 水素濃度計測システムの開発
Development of Instrumentation Systems of Hydrogen Concentration in PWR Primary Containment Vessel in case of Severe Accident
著者:
西 敏郎 Toshiro NISHI 谷川 薫 Kaoru TANIGAWA 福永 浩一 Koichi FUKUNAGA 吉次 信 Makoto YOSHITSUGU 右近 浩幸 Hiroyuki UKON 池内 武司 Takeshi IKEUCHI
発刊日:
公開日:
Hydrogen ConcentrationNernst EquationPrimary Containment VesselProton ConductorPWRReactor BuildingSevere AccidentSolid Oxide Electrolyte
概要
The accident at TEPCO’s Fukushima Daiichi nuclear power plant on March 23, 2011 was expanded into severe accident (reactor damage and hydrogen explosion). It led to loss of many instrumentation systems, and became difficult to grasp plant state. The instrumentation systems for the severe accident of the nuclear plant are being developed. In order to prevent the hydrogen explosion, the hydrogen concentration sensor is desired to measure the generated hydrogen in the primary containment vessel, and to detect leaked hydrogen into the reactor building. Although almost sensor could not be adopted by the severe accident’s environment, the solid oxide electrolyte type hydrogen sensor was selected for its durability to high temperature and high pressure. In this paper, the developments of the solid oxide electrolyte and the junction of ceramics and metal are described. And the performance test results of the hydrogen sensor under various conditions are presented.
