In this paper, we designed wireless network that consist of the internal network and the external network for measuring critical safety function of nuclear power plant. To collect sensor measurements of the each containment in nuclear power plant, communication packet structure for the internal network was designed, and sensor conditioning circuit was designed. Designed wireless networks can be utilized to the remote monitoring system for monitoring the measurement collected from multiple nodes. Also it is possible to evaluate the issue such inference occurred in wireless network that is used in nuclear power plants. Currently, we are developing a database management system for real-time monitoring, and designed wireless networks are scheduled to run SNR, BER, PER test in an environment similar to nuclear power plant for verification considering the transmission distance and the electromagnetic field.

Keywords: wireless Sensor network (WSN), nuclear power plant (NPP), critical safety function (CSR)