If you're referring to powder-actuated fasteners, driven in by a blank rifle cartridge ... ?
Once driven, there's no way of removing them, short of an act of demolition. (such as an angle grinder, which will remove only the portion that's above the surface)
In a classified area where hot work is prohibited, the only option might be to dissolve them with a strong acid.
And when you do remove them, you'll have to figure out an acceptable method of re-attaching them. I doubt an electric hammer drill or a powder-actuated driver will allowed, either.