UK Technical Process Safety Forum (formally UK Chemical Reaction Hazards Forum)
 |  Previous |  Home |  Next |  SiteMap |
ICRA Label
Safe Surf
Miltronic DHTML menu
Creative Commons License

Non Evaluated Plant Mods cause incident

Original Basis of safety

The original basis of safety had postulated that there could be a double charge of caustic to a batch, this had been experimentally checked and found to be safe.

The Incident

Later on the plant was modified, there was no cross checking with the hazards group, and a charge of 40 times the correct one was made in error.  This led to the ejection of the batch contents.  Fortunately no-one was hurt.

The Lessons

When a hazard has been identified and made safe, it is essential that later plant amendments be re-evaluated to ensure that the basis of safety is still valid

Back to Top