DETERMINING PROCESS SAFETY PERFORMANCE INDICATORS FOR MAJOR ACCIDENT HAZARDS USING SITE PROCESS HAZARD INFORMATION

摘要

Historically process plant key performance indicators (KPI) for safety have been developed through the experience of the site safety/operations personnel and considering information which was easily available. The information mainly included the records of compliant and non-compliant maintenance/inspection/testing routines and the historic incidentear miss data.Such performance indicators are mostly retrospective, or lagging, as they are based on data relating to how the plant had been operated. Although this is a good record of the historic performance, such indicators do not predict the future performance or trends of the assets. To do this leading performance indicators are required which can help to improve the safety/environment performance of the assets, by showing where there are potential weaknesses in the systems which need addressing before an incident occurs.The UK Health and Safety Executive (HSE) are in the process of addressing this discrepancy through the roll out of the implementation and follow-up to HSG 254 - Process Safety Performance Indicators (PSPI). The guidance is based on how safety and environmental performance measurement is related to major hazards associated with the process and site. The guidance, and HSE's associated training package, enables operators to determine relevant leading and lagging indicators based on a systematic review of the hazards of the site.High hazard process sites in the UK have identified major hazard scenarios in order to comply with COMAH regulations, and most other non-COMAH sites have some form of hazard identification record.This paper describes how the systematic development of PSPIs can be managed with the minimum of additional work, by using data from existing hazard identification studies (for example those developed for COMAH compliance). The methodology defines/selects leading and lagging PSPI to address the highest safety and environmental risks identified which ensures that relevant information is used to drive the performance improvements for the assets.This paper also addresses how PSPI can be developed, using slightly modified hazard identification techniques, where asset hazard identification documentation is not readily available.