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 Associated Press LAGOS, Nigeria December 22, 2011 (AP)

An oil spill near the coast of Nigeria is likely the worst to hit those waters in a decade, a government official said Thursday, as slicks from the Royal Dutch Shell PLC spill approached the southern shoreline.

The slick from Shell's Bonga field has affected 115 miles of ocean near Nigeria's coast, Peter Idabor, who leads the National Oil Spill Detection and Response Agency, told The Associated Press. Idabor said officials…

Unexpected releases of toxic, reactive, or flammable liquids and gases in processes involving highly hazardous chemicals have been reported for many years. Incidents continue to occur in various industries that use highly hazardous chemicals which may be toxic, reactive, flammable, or explosive, or may exhibit a combination of these properties. Regardless of the industry that uses these highly hazardous chemicals, there is a potential for an accidental release any time they are not properly…

Appendix Z .

Hydraulic analyses of BOP control system (from ultra Deep) ,one of scenarios that have been investigated is operating the EDS/Auto shear system “, the investigation found strong indications on that the EDS/Auto shear system haven’t worked as intended. There have been signs of leakage in the St-lock line and the question is raised how large leakage can the system have and still cut the drill pipe. Scenario 5 :failure in the EDS(Auto shear )system .This scenario has been…