A circuit breaker deemed quake-prone in 1978 remained installed at the Fukushima No. 1 nuclear plant for more than 30 years, contributing to its total loss of power after the devastating earthquake and tsunami in March last year, sources said.
The circuit breaker at the plant, run by Tokyo Electric Power Co., collapsed in the magnitude 9.0 quake, the sources said.
Continue reading at Plant used bad breaker for decades