Those Japanese are just so damned smart!
Taking a page out of the Fukushima nuclear reactor disaster, Japanese authorities have decided that other reactors must pass a tsunami test before reopening. Brilliant! Why didn't they think of that before?
The tests will examine the reactors' ability to withstand natural onslaughts of far greater force than previously factored into safety checks.
They will, for example, examine their ability to withstand an unusually severe event similar to the magnitude-9 earthquake and 15m tsunami that knocked out back-up generators at Fukushima Daiichi, leading to core meltdowns in three reactors.