Integrated dynamic risk assessment of buried gas pipeline leakages in urban areas |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, PR China;2. School of Emergency Management and Safety Engineering, Yancheng Institute of Technology, Yancheng, 224051, PR China;3. School of Safety Science and Engineering, Changzhou University, Changzhou, 213164, PR China;4. College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, Shandong, 266580, PR China;1. Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, 1 University Road, Yanchao District, Kaohsiung, Taiwan, ROC;2. Occupational Safety and Health Administration, Ministry of Labor, 439 Zhongping Road, Xinzhuang District, New Taipei, Taiwan, ROC;1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, People''s Republic of China;2. China Petroleum Pipeline Engineering Corporation, Langfang, People''s Republic of China;1. Institute of Safety Science & Engineering, South China University of Technology, Guangzhou, 510640, China;2. Guangdong Provincial Science and Technology Collaborative Innovation Center for Work Safety, Guangzhou, 510640, China;3. Joint Laboratory of Nuclear Power Plant Fire Safety, Guangzhou Institute of Industry Technology, Guangzhou, 511458, China |
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| Abstract: | In urban areas, buried gas pipeline leakages could potentially cause numerous casualties and massive damage. Traditional static analysis and dynamic probability-based quantitative risk assessment (QRA) methods have been widely used in various industries. However, dynamic QRA methods combined with probability and consequence are rarely used to evaluate gas pipelines buried in urban areas. Therefore, an integrated dynamic risk assessment approach was proposed. First, a failure rate calculation of buried gas pipelines was performed, where the corrosion failure rate dependent on time was calculated by integrating the subset simulation method. The relationship between failure probability and failure rate was considered, and a mechanical analysis model considering the corrosion growth model and multiple loads was used. The time-independent failure rates were calculated by the modification factor methods. Next, the overall evolution process from pipeline failures to accidents was proposed, with the accident rates subsequently updated. Then, the consequences of buried gas pipeline accidents corresponding to the accident types in the evolution process were modeled and analyzed. Finally, based on the above research, dynamic calculation and assessment methods for evaluating individual and social risks were established, and an overall application example was provided to demonstrate the capacity of the proposed approach. A reliable and practical theoretical basis and supporting information are provided for the integrity and emergency management of buried gas pipelines in urban areas, considering actual operational conditions. |
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| Keywords: | Urban area Buried gas pipeline Dynamic risk assessment Individual risk Social risk |
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