CANDU (heavy water reactors) are designed for passive shutdown safety and would likely have survived the event. Since this is a VERY extreme event that means that there is almost NO likelihood of a geophysical event that would cause them to fail.
Also note that his point about japan being crisscrossed with faults is not relevant. The damage was from the Tsunami for which there were inadequate defenses and the failure of backup power from the subseqent flooding. Without a steady and active cooling, light water reactors can 'melt down' even when 'shut down' at the time.