[yazaddaruvala]

You’re right about old nuclear design.

The new designs are built with the expectation that power can be cut off. The new design shut themselves off passively without any damage (that we know of) when the power is gone.

[jliptzin]

Seems to me like it should have been this way from this start. Catastrophic meltdown caused by power loss, no matter how many power backup systems there are should have been a non-starter. Basically requiring a 100% SLA, 6 nines not enough, with catastrophic consequences for failing to adhere to 100% uptime. That is scary as hell.