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Mines Safety Significant Incident Report No. 107

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Eight refinery employees were exposed to ammonia gas from three separate incidents during the modification and recommissioning of a primary flash tank. A flammable gas explosion also occurred during these operations. Symptoms of exposure ranged from shortness of breath to headache, nausea and vomiting. One employee was taken to hospital for further testing.

In the first incident seven employees were exposed to ammonia released when flange bolts were being loosened prior to removal of a temporary relief line.

The explosion occurred during the cutting of a main relief line between the primary flash tank and the relief tank.

Further ammonia exposures occurred later in the day when a fan was being fitted to the relief line and blanks were being swung at the feed end of the flash vessel.


Department of Minerals and Energy Western Australia

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Relates to Western Australia (WA)

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PDF Document

Western Australia




Government of Western Australia


9 Oct 2001

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