The Moscow region is a net importer of electricity and both of those power plants are massive. However they also have a lot of power plants. After all the population of Moscow and Moscow Oblast combined is 21million.
Oh it actually is. In an actual war any part of the government or infrastructure that supports the military is fair game. So to use the US as an example, hitting the IRS building is probably not okay. But hitting the DFAS building, (they pay the troops), is a thing.