If Putin does it, it means he's launched enough missiles to be seen as a world threat. At that point, he wouldn't send that many missiles to a nuclear power plant, but to a strategic objective like a city instead. Not to say that completely blowing up a nuclear plant (which are designed to survive a military attack) that close to your country doesn't seem the best choice. Journalists are often only interested in making big numbers with exaggerated news just to scare people