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Bhopal disaster (1984)

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Author Topic: Bhopal disaster (1984)  (Read 1136 times)
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Jessie Phallon
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« Reply #15 on: June 19, 2009, 01:31:08 pm »

The leakage

•   In November 1984, most of the safety systems were not functioning. Many valves and lines were in poor condition. Tank 610 contained 42 tonnes MIC, much more than allowed according to safety rules.[1][2]
•   During the nights of 2–3 December, a large amount of water entered tank 610. A runaway reaction started, which was accelerated by contaminants, high temperatures and other factors. The reaction generated a major increase in the temperature inside the tank to over 200°C (400°F). This forced the emergency venting of pressure from the MIC holding tank, releasing a large volume of toxic gases. The reaction was sped up by the presence of iron from corroding non-stainless steel pipelines.[1][2]
•   It is known that workers cleaned pipelines with water. They were not told by the supervisor to add a slip-blind water isolation plate. Because of this, and of the bad maintenance, the workers consider it possible for water to have accidentally entered the MIC tank.[1][2][3]
•   UCC maintains that a "disgruntled worker" deliberately connected a hose to a pressure gauge. [1][2][10]
•   UCC's investigation team found no evidence of the suggested connection.[11]
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