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7/28/2019 CSB_Two Industrial Accidents involving Chemical Reactions
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Stephen Selk PEManager, Investigations
Two Industrial Accidents
involving
Chemical ReactionsSept. 15, 2008
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DisclaimerThe presentation entitled: Three Industrial Accidents involvingChemical Reactions given by Stephen Selk of the UnitedStates Chemical Safety and Hazard Investigation Board onSeptember 15, 2008 at the AIChE SACHE Faculty Workshop is givenfor general informational purposes only. It represents theindividual views of the presenter and all references, conclusionsor other statements regarding current on-going CSB investigations
are preliminary in nature and limited to information that is already inthe public domain. Furthermore, this presentation is not a product ofthe Board and its contents have not been reviewed, endorsed, orapproved as an official CSB document. For specific and accurateinformation on completed investigations, please refer to the finalpublished investigation report by going to the CSB website atwww.csb.gov and clicking on the specific report desired underCompleted Investigations. To the extent this paper includes
statements about the conclusions, findings, or recommendations ofthe Board, such statements come under the general prohibition in 42U.S.C. 7412(r) (6) (G).
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First Chemical Corporation, Pascagoula, MS
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How did it happen?
Unit was shutdown
Mono-nitrotoluene left in tower
Reboiler steam valves leaked
Extended thermal history
Runaway thermal decomposition
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Causes
No formal hazard analysis
Inadequate layers of protection
No documented relief system basis
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T2 Labs, Inc. Jacksonville, FL
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MMTMethyl-cyclopentadienyl manganese
tri-carbonyl
http://upload.wikimedia.org/wikipedia/commons/f/f3/MMT-3D-balls.png7/28/2019 CSB_Two Industrial Accidents involving Chemical Reactions
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VIDEO
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October 7, 2008
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