5. Ethylene oxide is produced by adding ethylene, oxygen, a methane diluents and recycled carbon dioxide to a continuous reactor. Gaseous compositions are controlled carefully to keep the concentrations outside the flammability limits. One plant experienced an emergency situation. The emergency procedures specified: close the oxygen feed valve. The oxygen control valve was normally closed by bleeding air out of the valve bonnet diaphragm (air to open). The bleed line was opened and was noted on the control panel. The air, however, did not bleed off through the bonnet vent because a mud dauber wasp constructed mud cells over the vent hole. Although the vent valve was open, as indicated on the control panel, the air could not escape. The gases in the ethylene oxide reactor moved into the explosive region while being above the auto ignition temperature. A violent explosion occurred, resulting in several injuries and significant plant damage. (a) Based on the case study above, discuss the Process Safety Management violations that lead to the explosion. (b) Based on the case above, discuss the preventive and mitigating actions should be taken in order to prevent the similar accident in future