1 / 9

Quantitative Risk Assessment

Learn about the systematic methodology of QRA, including hazard identification, consequence & frequency analysis, risk estimation & evaluation, and risk management. Understand the importance of CIMAH & EQA regulations in safety reports. Explore methods like HAZID, fault-tree analysis, and Probit Analysis. Enhance your understanding of identifying hazards, assessing damage, and proposing mitigating measures.

omargaret
Télécharger la présentation

Quantitative Risk Assessment

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Quantitative Risk Assessment

  2. What is QRA • Systematic methodology to assess risks associated any installation • Taking into consideration all forms of hazards • Uses design information and historical data to estimate frequency of failure • Uses modelling software to assess consequence • Where/when is QRA needed • CIMAH 1989 – part of CIMAH safety report • EQA 1985 – a section under EIA

  3. Definition Risk = Severity x Likelihood • Extent of Damage • Fatality • Injuries • Losses • Analysis based on design and modeling equations • Likelihood of event • Based of failure frequency of process components • Analysis based on manufacturer’s and historical data

  4. Methodology Hazard Identification Consequence Analysis Frequency Analysis Risk Estimation and Evaluation Risk Management

  5. Hazard Identification • Purpose: to identify plausible hazard conditions • Methods • Check-list, Preliminary Hazard Review, HAZID, HAZOP etc. • Unstructured brainstorming? Further Details

  6. Frequency Analysis • Sometimes referred to as Hazard Analysis • Purpose: To estimate the likelihood for a hazard scenario to occur • Methods • Event-Tree Analysis • Fault-Tree Analysis Further Details

  7. Consequence Analysis • Purpose: To assess the extent of damage • Typical Hazard • Toxic Release, Fire and Explosion • Modelling of hazard scenario • Toxic Release: Source (Release) Model, Dispersion • Fire and explosion: Source Model, Fire and Explosion, Heat Dispersion • Fatality Assessment: Probit Analysis • Nonfatal Consequence: Skin-burn, Property damage Further Details

  8. Risk Estimation and Evaluation • Purpose: To assess Risk and Make Safety Judgment • Methods • Individual Risk: IRPA, LSIR • Societal Risk • Tolerability Criteria Further Details

  9. Risk Management • Propose: to propose mitigating measure to reduce the potential impact of the hazard and possibly reduce the risk level • Method • Safe Work Procedure at every project stages • Emergency Response Management • Emergency Response Procedure

More Related