Zaius
Zaius is the mining foreman in Broken Hills. He manages mining activities from his office near the mine entrance. Zaius is a super mutant who can teach the demolitions profession, and he also sells uranium ore for 500 caps a each.
You can buy from him followed blueprints:
Grenade (Plasma) - 7500
Dynamite - 10000
Plastic Explosives - 25000