Forum:Reactor effects?

I have a reactor deck. Trap Reactor, Spell Reactor, Summon Reactor and Flying Fortress Skyfire. I noticed the effect on the trap and spell reactors don't say "negate."

Spell reactor's effect: "Once per turn, when your opponent activates a Spell Card, you can destroy the spell card and inflict 800 damage to yoru opponent."

If my opponent activates a spell card and i have my spell reactor on the field, is the spell negated and destroyed? Or does the spell effect still apply? Because if it doesn't negate the effect, it would make my skyfire deck useless D: