7.3 magnitude quake hits north Japan, tsunami alert issued

The meltdowns happened due to a primary cooling loop failure which in turn was caused by a loss of power to the primary coolant loop (because the backup diesel generators weren't located high enough above sea level to avoid being swamped by the tsunami).

Given the rhetoric about right now about the possibility of a nuclear exchange I wonder how many commercial nuclear plants would also melt down in the event of an EMP attack. I've always thought that nuclear as we have it is safe as long as the operators don't do anything aggressively dangerous but I'm thinking that any reactor that cannot passively keep itself below meltdown temperature is inherently unsafe and replacing them all with SMRs should be a public safety priority.