Japan suffered from a massive earthquake and tsunami in 2011. Thermal power p1ants in Tohoku E1ectric Power Company were also affected by seawater inundation. Almost all power equipment such as switchgears，motors，cables，wires in a thermal power plant，Shin-Sendai Thermal Power Plant ，have been covered with seawater. The present paper reports recovery actions of low voltage wires in the plant. The authors have investigated the seawater conditions in the wires and have determined the refurbish criteria required to realize rapid restoration of the plant. Nearly 2600 wires were subsequently reused，and recovery works were finished within five months. The plant resumed its commercial operation at the end of Dec. 2011，and all reused wires have been working well until now.