[en] This study demonstrates that the resistance temperature detectors (RTDs) used for short-term reactor trip and safety injection and the transmitters used to initiate safety injection for a high steam flow condition will perform their short-term safety functions in the event of an accident. The tests also covered RTDs used for postaccident monitoring and the sensor system used to provide the containment pressure trip and monitoring functions. Both radiation and environmental tests were carried out on instruments identical to those used in Westinghouse PWR operating plants. The results of the test program indicated that the RTDs and transmitters will perform the required functions