K.M. Koo
Universal Monitoring & Inspection, Inc.,
Korea
Keywords: NPPs, nuclear power plants, CB, container building, SAECs, severe accident environmental conditions, SBO, station blackout, loosely coupled coils, wireless power transmissions, DMTC, diagnostic module of telemetry circuit
Summary:
Major nuclear accidents since the 1970s include the TMI (Three Mile Island) nuclear accident in the United States (March 28, 1979, Pennsylvania), the Chernobyl nuclear accident in Ukraine (April 26, 1986), and the Japanese nuclear accident in Fukushima Daiichi (March 11, 2011) were occurred. In particular, in the case of the Japanese accidents, a major accident was caused by a magnitude 9.0 earthquake and a tsunami at Fukushima Nuclear Power Plant Units 1-4. A common problem with these incidents is that an SBO fault will result in power loss to all electrical instrumentation and control systems. According to 10 CFR 50.2, a blackout means "complete loss of alternating current (AC) power to the nuclear power plant's essential and non-essential device buses (i.e., loss of the external power system concurrently with the cooling water turbine." In this case, the The power system will not be able to supply power In the event of such an accident, this technology was prepared as a new alternative, such as a loosely coupled coil for wireless power through a container building (CB) with high strength using simulation codes. A new analysis module was developed to analyze the error range when the conditions of the internal environment (temperature, humidity, atmospheric pressure, solar radiation, etc.) exceed the environmental standards (in the case of temperature) of the measuring equipment. At this time, the power method supplied to the remote diagnostic circuit module is a design structure of wireless power transmission through combined magnetic resonance. It is based on the CB thickness with a basic coil coupler design under a reinforced concrete structure. At this time, the input function that exceeds the range of the standard signal level can diagnose the components of the equivalent circuit through the output of the condition function such as high temperature condition by applying this remote diagnosis circuit module. The wireless power supply simulation procedure is the design of the transmit/receive mode for power supply in CB reinforced concrete structures, and the power control system for wireless power supply leads to optimization of experimental variables such as transmittance, permittivity and thickness. As a result, the Q factor can be calculated according to the resonance frequency.