They planned for a certain level of tsunami/earthquake, but this particular tsunami exceeded norms. They could have protected against this, but siting it near

They planned for a certain level of tsunami/earthquake, but this particular tsunami exceeded norms. They could have protected against this, but siting it near the coast is desirable for cooling purposes too (and has been helpful in some ways for cleanup as they've been able to dispose of waste in the ocean), so there are conflicting concerns here. Things fail from time to time, if that thing failing is catastrophic, it gets very expensive to ensure 100% reliability.