Ok the blast radius seems alot more realistic now.
What got me a little disappointed is the overall look of the nuke.
Sure it tints the environment redish and debris is flying all around, but the visual explosion is a little small. Plus the smoke is disappearing way too fast and theres not really much smoke at all. Take a look at real nukes, they create alot more ground smoke and stuff.
Ok it would eat more performance, but the nuke is a weapon of mass destruction. Just take this blast radius, resize the overall explosion (smoke, fire) and increase ground smoke generation and as well the smoke lifetime. I instantly would fall in love with that