The Natural Philosopher wrote:

ISTR that the three other units at Chernobyl *did* continue operating
after number 4 exploded?

No, I think all were scrammed because of the earthquake and all were
flooded.

Chernobyl, not Fukushima ... and apparently the other units did operate
after 1986 until the last one shut down un 2000 (wouldn't surprise me if
they were shutdown in the immediate aftermath and then restarted)