If it's done it a further 3 times after you replaced the alternator Pedro, you have a short somewhere that is causing it to draw more than the rated capacity of the fuse (10a from memory).
If the wiring is all intact and good, the alternator regulator failing has probably caused an internal short in the fuel pump (most likely in the armature windings).
I would look at the pump and the wiring circuit as SSS says. If the current draw is high, but not above the rated, it will heat the wiring and then ultimately the fuse. Think of what happens when you put big headlight globes with standard wiring.
A question to ask is how many pumps are you running off that circuit, what is the rated current draw for the pump, what is the rated capacity of the factory wiring and what other items are running off that circuit. If you identify there is too much current draw on the circuit, i would suggest rewiring the circuit, or running the pump from its circuit with a separate fuse.
This may simply be a something that is not new, but has been highlighted by the failure of the alternator. More work for you pedro.