In article , Terry Harper
writes
There would
not be a standby generator, but a standby power station. Think in
terms of the size of some of the old ones.

Yes, it would be a big gas turbine. Would a few hundred MW be adequate, do
you think?

Dinorwig (Llanberis) was designed as a power station for fast backup.
1,728MW available within 16 seconds, apparently.
--
"It used to be that what a writer did was type a bit and then stare out of the
window a bit, type a bit, stare out of the window a bit. Networked computers
make these two activities converge, because now the thing you type on and the
window you stare out of are the same thing" - Douglas Adams 28/1/99.