QRA is a systematic technique to analyze risks associated with oil and gas installation and comply with regulatory requirements in some cases. QRA integrates both major accident hazard consequences and its frequency, i.e. likelihood of occurrence of this consequence to estimate the numerical indicator of risk to both personnel and public, as applicable, this helps to demonstrate that calculated overall risk levels are either in Acceptable or As Low As Reasonably Practicable region, in accordance with risk tolerability criteria followed by respective end user. QRA will identify the key risk contributing scenarios / equipment / units within the facility to evaluate further risk reduction measures which will be subject to cost benefit analysis for further implementation.
FERA assessment will also evaluate fire / explosion risk escalation possibilities to the adjacent plant units and operating facility to ensure adequate safe distance are available. FERA will assist in development / re-assessment of fire zones extent within facility which helps in managing separation distance between the independent plant, flare design and firewater design requirements.
