This. Any serious malfunction is likely shutting down your block on the order of months to for good.
Let's rule out Chernobyl and look at TMI and Fukushima.
- Three Mile Island had cleanup costs of $1B (1982, so maybe $2-3B in todays money).
- Cleanup costs after Fukushima seems to be about $500B+
So, even though reactor prices seems to have tripled, cleanup costs seems to have no upper limit.
Was the 500B entirely of radiation, or also the well tsunami. As if we want to lover the later we must remove all people from coast forcibly and maybe make some kinds of zones patrolled by armed guards to prevent people entering there.