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A steam boiler providing high pressure motive steam for the refrigeration compression turbine driver exploded. The boiler firebox causing was breached, triggering a fireball and a second, much larger vapour cloud explosion (VCE) which spread outward completely destroying several units (equal to 43% of the site’s production capacity). It destroyed the administration, maintenance and security buildings, trapping workers under debris. Other units damage was minimal, however surrounding structures, including a nearby power plant, an LNG loading berth and numerous other buildings were damaged. The neighbouring refinery was shut down as a precaution with the effected units eventually rebuilt and restarted later.
Ask yourself and your crew:
- How can something like this happen here (e.g. on our site)?
- What safety measures (i.e. procedures, controls/barriers) do we have in place to mitigate the risk?
- How do we know the risk controls/barriers are working?
- What improvements or changes should we make to the procedures, controls/barriers or the way we work?
Original content courtesy of IChemE Safety Centre
