An explosion suppression system wherein a photodetector (10), a capacitor circuit (12) and a detonator (14) provide an initiation signal to a dispersion tube (18). The dispersion tube includes a casing (20) having orifices (26), an inner tube (28) where the explosion suppressant is stored, and a propellant cord (34) that is located between the storage casing and the inner tube. In response to the initiation signal, the explosion suppressant is expelled from the orifices (26) and through nozzles (27) to form a controlled spray pattern to quench initial flame in a fuel tank before there is time for a damaging pressure rise.