The nukes in Fallout 4 make decent-sized explosions but you might've been hoping for something a little more substantial. If that's the case, download XXL Nukes.
XXL Nukes for Xbox One makes several changes to the nuclear explosions you create and see around the Commonwealth.
First, it increases the radius and damage for all in-game nuclear explosions. It also adds new explosion animations and adds some new sound effects and visuals.
On top of that, it increases the MIRV range and projectile spread and adds two craftable items: An Overcharged Mini Nuke (Chem Bench) with its own unique explosion animation and a OC1 Heavy Rail for FatMan (Weapons Workbench).