KYIV, Sept 27 (Reuters) - Ukraine will not be swayed by any nuclear threats from Moscow or annexation votes held on its territory and will press ahead with its plan to wrest back all its occupied land from Russia, a Ukrainian presidential adviser said on Tuesday. Mykhailo Podolyak told Reuters the world's nuclear powers should warn Russia that any use of strategic or tactical nuclear weapons in Ukraine would be met with concrete action, and that Kyiv lacked the technology to respond symmetrically itself. Such warnings are seen as designed to deter Ukraine and the West by hinting that Moscow could be ready to use tactical nuclear weapons to defend newly annexed territory. "And we're supposed to accept this model or else a nuclear weapon will be used?...This is nonsense and it is unacceptable. He said it was imperative the world's nuclear powers made it clear to Russia that use of nuclear weapons would be punished with tangible measures - and not just elicit a U.N. Security Council resolution.

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