Spaceflight Applications
Nuclear explosions have been studied as a possible method of spacecraft propulsion. The most well-known example was Project Orion, which studied the possibility of a spacecraft propelled by the detonation of nuclear devices which it released behind itself.
Another application would be for deflecting or destroying celestial objects like comets, meteors, or asteroids on a collision course with Earth that have the potential for causing destruction.
Read more about this topic: Nuclear Demolition