Absolutely not. Even prehistoric humans figured out not to live near the malaria pond, not to eat the wrong berries and which parts of the animal make you drop dead. And if they maintain civilization, all the warnings are useless anyway.

First off, I'm not saying they'd maintain civilization; I'm talking about the case in which they lose a ton of civilization but manage to get to a state where they can quarry and break concrete before they rediscover radiation, as well as lose their language. Finally, by the time they figure it out, the nuclear radiation would have spread out a ton from the site. The ability to break does not imply the ability to construct.