Three mile Island's core also melted by didn't breach containment. That fact hasn't been widely publicized. And there is a tendency to skip over that TMI is on the Susquehanna River which drains into Chesapeake Bay.
TMI came within hours of being a monumental disaster.
yea, not sure how to get to 4. Either you stop at 3 or you expand your scope to include contained meltdowns and meltdowns at small scale experimental and military facilities, in which case you end up around 7-20 depending on how serious a meltdown has to be to be included.
