Uncontrolled Explosions especially nuclear are NOT a good Idea, it requires a controlled and responsive engine with a vessel who's structural integrity wont be compromised when directional changes are required especially under collision conditions, and there is also those little pieces of sand moving at speeds that turn them into BOMBS with the explosive capacity of a small nuclear weapon under certain conditions of impact.

E=MC^2 is the same as F=MS^2 when you get right down to it so a shielding of some type that redirects the impact instead of colliding with it.

Yesterday's Science Fiction becomes todays Science Facts if you work on it and not surprising there just might be a way.

N. Shadows