A number of minor explosions occurred in the interrupter pot on a chlorine cell. No injuries or damage were reported.No previous explosion shad occurred which was taken to indicate that hydrogen concentration within the pot was not normally within flammable limits. The ignition was believed to have resulted from the detachment of the dispersing tray in the pot, the resultant lack of a controlled break in the conductive sodium hydroxide stream leading to the release of sufficient electrical energy to ignite the flammable gas mixture. However, it was also thought that other conditions could provide sufficient energy to ignite hydrogen and air mixtures, and that elimination of the possibility of electrical ignition would be very difficult.To prevent reoccurrence it was proposed to avoid the presence of flammable mixtures with the pot. The following possibilities were identified:1. Prevent hydrogen concentration from reaching the lower explosive limit by having excess induced air into the pots.2. Prevent a flammable mixture by providing an inert atmosphere.3. Prevent a flammable mixture by keeping the hydrogen concentration above the upper flammable limit by modifying the seal caps on the interrupter pots.Various missing information was to be sought to assist understanding the event and prevention of its reoccurrence. This includes:1. Pressure within the interrupter pots.2. Hydrogen concentration within the interrupter pots.3. Experience of explosion by other chlorine producers with this type of interrupter pot.