If that is all of the over exposure, so far, it is a testament to the overall plant design. We just lost 300 or so people in one weather event, and Japan lost something north of 20K in the earthquake/tsunami, that had nothing to do with nuclear power.
Agree that plant design held up fairly well, I attribute these radiation exposures to human decision making errors.
Agree that tornado, tsunami, and earthquake fatalities are unrelated to nuclear power.