A prime example of redundancy with isolation is a nuclear power plant. The new ABWR has three divisions of Emergency Core Cooling Systems, each with its own generators and pumps and each isolated from the others. The new European Pressurized Reactor has two containment buildings, one inside the other. However, even here it is possible for a common mode failure to occur (for example, in the Fukushima Daiichi Nuclear Power Plant, mains power was severed by the Tōhoku earthquake, then the thirteen backup diesel generators were all simultaneously disabled by the subsequent tsunami that flooded the basements of the turbine halls).