Exactly. It's the emergency break for the reactor, so long as gravity works the failsafes will work unless something horribly, horrible wrong has happened at the mechanical level and then was ignored. More so than nuke plants, I'd be worried about the tens of thousands of chemical works around the country.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.