Reliability analysis of subsea blowout preventer control systems subjected to multiple error shocks |
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| Authors: | Baoping Cai Yonghong Liu Zengkai Liu Xiaojie Tian Hang Li Congkun Ren |
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| Institution: | 1. Formal Methods and Tools, Faculty of EEMCS, University of Twente, The Netherlands;2. Software Modelling and Verification, RWTH Aachen University, Germany;1. Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao, Shandong 266580, China;2. Centre for Risk, Integrity and Safety Engineering (C-RISE), Memorial University, St John''s, NL, A1B 3X5, Canada;3. Safety and Security Science Group, Faculty of Technology, Policy, and Management, Delft University of Technology, the Netherlands;4. School of Resources Engineering, Xi’an University of Architecture and Technology, No.13 Yanta Road, Xi''an, 710055, China;5. Navigation College, Dalian Maritime University, No. 1, Linghai Road, Dalian, China;1. College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, Shandong, 266580, China;2. Department of Systems Engineering and Engineering Management, City University of Hong Kong, Kowloon, Hong Kong;3. Department of Production and Quality Engineering, Norwegian University of Science and Technology, Trondheim, Norway |
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| Abstract: | Two configurations of subsea blowout preventer (BOP) distributed control systems, which are triple modular redundancy (TMR) control system and double dual modular redundancy (DDMR) control system, are presented. With respect to common-cause failures, the performances of the two systems are evaluated by using Markov method with multiple error shock model. Due to the complexity, each system is split into three independent modules, and the corresponding Markov models are proposed subsequently. The probability of failure on demand, availability and reliability of the systems are evaluated by merging the independent Markov modules by Kronecker product approach. The results indicate that a same safety integrity level of SIL3 can be attained for the two configurations, which satisfies the requirement of subsea BOP control system, even though both of them have some advantages and shortcomings. In addition, for TMR control system, the effects of multiplicity distribution of multiple error shock and mean time to repair on reliability performances are studied. |
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