No nation that has a working arsenal of nukes is going to just give them up.
Muammar Qaddafi of Lybia did give up his nuclear program (not quite a working arsenal) in December of 2003, right after Saddam Hussein was pulled out of the spider hole in Iraq.
Eight years later Obama / Hillary Clinton team decided that Qaddafi outlived his usefulness and he met a gruesome end.
Don't think that Iranian mullahs and Kim didn't notice:
"The Saddam Hussein regime in Iraq and the Gaddafi regime in Libya could not escape the fate of destruction after being deprived of their foundations for nuclear development and giving up nuclear programmes of their own accord," - North Korea cites Muammar Gaddafi's 'destruction' in nuclear test - 2016 January 09, The Telegraph.
and
"The Saddam Hussein regime in Iraq and the Gaddafi regime in Libya could not escape the fate of destruction after being deprived of their foundations for nuclear development and giving up nuclear programmes of their own accord." - The Saddam factor in North Korea's nuclear strategy - 2016 September 09