There's not much point to it, you achieve incremental damage because they're so spread out.
Not the battery backup system. And batteries are incredibly explosive and will explode sympathetically. Its much like hitting a refinery in that regard. NPPs have been hit during this war with bombs, they survived just fine because they are built in much the same way as a hardened military structure. They can withstand a fully loaded 747 hitting them directly at the speed of sound. That's more boom than all but the largest ordinance.