(13b) Implementation Methodology of Third Part Interference Frequency Reduction Using ISO 13.623

The transportation of fluids is a fundamental part of the energy and infrastructure matrix of countries. Thus, it is essential that premises for safer and more efficient transport technologies are developed and implemented. Within this context, pipelines are, admittedly, the safest way of transportation for natural gas. Despite this, several environmental licensing and regulatory premises are established for the construction and operation of pipelines, being the Quantitative Risk Analysis (QRA) of the project one of the most important, considering the regions surrounding the pipeline, regarding the surrounding community and the environment. This paper establishes the implementation of the methodology used to reduce the frequency of occurrence of third-party action in the pipelines, such as the application of physical barriers (concrete slabs). Derived from ISO 13.623 - Petroleum and natural gas industries — Pipeline transportation systems, the methodology generates a new global failure frequency and, as a result, a reduction in social risk is achieved as it is calculated based on the mitigating measures applied, following the premises for Quantitative Risk Analysis (QRA) from the Guidance Standards for the Preparation of Quantitative Risk Analysis (QRA) of CETESB P.4.261, which addresses the terms of reference and methods for deciding this type of study. Based on the Quantitative Risk Analysis (QRA), it is possible to have a better technical assessment of the risks of the project and assertiveness in the analysis of its impacts by the licensing and regulatory agencies. The application of this methodology is essential for the safety of operations given the projected population density of large centers in the coming years, helping gas transportation companies in the analysis and characterization of risk in surrounding populous regions.