4.9.3Process Safety Reporting

A Loss of Primary Containment (LOPC) is defined as an unplanned or uncontrolled release of any material from primary containment, including non-toxic and non-flammable materials (e.g. steam, hot condensate, nitrogen, compressed CO₂ or compressed air).

A Tier 1 or Tier 2 PSE is defined as an LOPC from a process system that meets criteria defined in API RP 754.

LOPC events are reported in the Company’s Single Reporting System as highlighted in sections 2.1.2 and 4.10.1. This system includes a built-in calculation tool to assist the user in determining the release quantity of LOPC events. All LOPCs are analysed to identify those considered to be PSEs as per API RP 754. Process Safety KPIs used by the Company include the number of Tier 1 and the number of Tier 2 PSEs.