The probability is hard to calculate primarily because of the possibility of what are called common-cause accidents, where the lossofoff-sitepower and of on-site power are caused by the same thing.
The probability is hard to calculate primarily because of the possibility of what are called common-cause accidents, where the lossofoff-sitepower and of on-site power are caused by the same thing.
发生此类事故的概率很难估计，因为发生由于同种因素导致核电站内外同时断电的概率难以计算。
3
Tepco said the reactors shut due to the lossof offsite power due to the malfunction of one of two off-site power systems.