A methodology for frequency tailorization dedicated to the Oil & Gas sector

Abstract The likelihood of leaks from process equipment is a key input to any Quantitative Risk Assessment. This study is aimed at developing a methodology supporting the tailorization of leak frequency values. Specific modification factors for the facilities of the Oil & Gas (O&G) upstream sector are used for this purpose. The method (TEC2O—frequency modification methodology based on TEChnical Operational and Organizational factors) is based on an aggregated set of indicators, whose contribution to the expected leak frequency is systematically evaluated through a specific procedure. Periodic revision and update represents an added value to the method, because it may be adopted to drive the identification of critical safety issues in a facility, integrating technical and managerial aspects and supporting continuous monitoring. The method is compared with similar literature methods and applied to a representative case study in order to demonstrate its potential and advantages.

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