ICONE23-1228 DEVELOPMENT OF INSTRUMENTATION SYSTEMS FOR SEVERE ACCIDENTS-[5] : Basic Properties of Hydrogen Sensor with Solid Electrolyte for Safety Measures of LWRs

Abstract

The accident at Tokyo Electric Power Company's Fukushima Dai-ichi Nuclear Power Plant (TF-1 accident) caused severe situations and resulted in a difficulty in measuring important parameters for monitoring plant conditions. Therefore, we have studied the TF-1 accident to select the important parameters that should be monitored at the severe accident (SA parameters) and are developing the Severe Accident Instrumentations and Monitoring Systems (SA-keisou) that could measure the parameters in severe accident conditions. In this study, the hydrogen sensor with solid electrolyte was developed for measurement of H_2 concentration as the Severe Accident Instrumentations and the performance tests of the developed hydrogen sensor were carried out under various temperature and pressure conditions. In the results, the basic properties of the sensor such as the electron motive force (EMF) behaviors were evaluated for the change of H_2 concentration under these conditions.