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Pre-FEED 단계에서 개념적 화재 & 폭발 위험도 평가를 위한 기반 모델 개발 : Development of the Conceptual Fire & Explosion Risk Assessment-base model in Pre-FEED stage

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dc.contributor.advisor장범선-
dc.contributor.author이경수-
dc.date.accessioned2017-10-31T07:39:48Z-
dc.date.available2017-10-31T07:39:48Z-
dc.date.issued2017-08-
dc.identifier.other000000146559-
dc.identifier.urihttps://hdl.handle.net/10371/137427-
dc.description학위논문 (석사)-- 서울대학교 대학원 공과대학 조선해양공학과, 2017. 8. 장범선.-
dc.description.abstractThe offshore platforms have a number of equipment in process area. This process area faces a high probability of hydrocarbon fire accident because most of equipment are contained the flammable oil and gas circumstances. Therefore, the fire risk analysis is an essential safety study which should be considered in the whole development phases of an offshore platform installation. Based on the information at each development phase and level of data, the fire risk analysis results are reflected into the design with increasing the level of accuracy. However, the results of fire risk analysis considering the initial process data and layout data are conservative because most of fire risk analysis is performed under assumptions and insufficient input data in pre-FEED stage.
There is a need for a way to develop an integrated system to overcome the problems of the existing fire risk analysis method. The scope of this study is to develop the integrated system, which is required to respond with the data quickly from process design and improve FRA results in pre-FEED stage. This system is named as Integrated Fire & Explosion Conceptual Risk Analysis (IFECRA) system.
The basis of the fire risk analysis input data is defined from the process and layout information, and this study proposes the standard data transfer sheet. In addition, this study develops the modules which calculate the leak frequency automatically and generate a simplified 3D model. Therefore, the IFECRA is able to work with 3D fire CFD simulation using a 3D simplified model. Furthermore, the fire risk analysis module develops to determine the failure of critical targets and the rate of passive fire protection based on the design accidental loads. Using the developed IFECRA system, the fire risk analysis is automatically calculated, and the design effect zone is obtained from the both CFD model and analytical model fire simulation results. Quantitative comparison between the failure of critical targets and the rate of passive fire protection are done by employing the design effect zone.
For results of the fire risk analysis, it is confirmed that the risk analysis results using the IFECRA system have relatively accurate compared to the existing fire risk analysis method.
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dc.description.tableofcontents1. Introduction 1
1.1. Research Background 1
1.2. State of Art 2
1.2.1. Flame-Size-Based Approach 3
1.2.2. Heat-Dose-Based Approach 4
1.2.3. Exceedance-Curve-Based Approach 5
1.2.4. Cumulative Failure Frequency-Based Approach 5
1.3. Objective in This Study 6
2. General Procedures of Fire Risk Analysis Case in Pre-FEED Stage 9
2.1. Fire Risk Analysis Input Data 9
2.2. Fire Scenario Identification 10
2.3. Leak Frequency Calculation 12
2.4. Fire Frequency Calculation 16
2.5. Fire Simulation 17
2.6. Risk Analysis 18
2.6.1. Design Accidental Load 19
2.6.2. Effect Zone 19
2.6.3. Design Effect Zone 21
2.7. Risk Control 23
3. Development of Integrated Fire & Explosion Conceptual Risk Assessment System 26
3.1. Introduction of IFECRA System 26
3.2. FRA Input Data 28
3.3. Central Database of IFECRA System 32
3.3.1. Routing Algorithm: Rectilinear Method 36
3.3.2. Routing Algorithm: A* Method 39
3.3.3. Valve Positioning 47
3.4. Inventory Calculation Module 50
3.5. Leak Frequency Calculation Module 52
3.6. Simplified 3D Generation Module 56
3.7. Fire Risk Analysis Module 59
3.8. User Interface 63
4. Case Study 64
4.1. Fire Scenario Identification 64
4.1.1. Effective Leak Directions 68
4.2. Leak Frequency Calculation 69
4.3. Fire Frequency Calculation 71
4.4. Fire Simulation 72
4.4.1. Radiation Calculation 72
4.4.2. Fire Simulation Result 77
4.5. Risk Analysis 80
4.5.1. Design Criterion 80
4.5.2. Design Effect Zone 82
4.5.3. Design Effect Zone Comparison 85
4.5.4. Impact Analysis Results 88
4.6. Risk Control 96
4.6.1. Passive Fire Protection Rating Results 96
5. Conclusion 100
5.1. Summary 100
5.2. Findings 101
6. References 103
7. Appendix 106
7.1. Appendix A: Example Rule Set of Process Piping Lengths 106
7.2. Appendix B: Constraint Conditions in Piping Algorithm 108
7.3. Appendix C: A Simple Example of A* Algorithm 113
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dc.formatapplication/pdf-
dc.format.extent5633534 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 대학원-
dc.subjectQuantitative risk assessment-
dc.subjectFire risk analysis-
dc.subjectOffshore-
dc.subjectTopside-
dc.subjectProcess area-
dc.subjectIntegrated system-
dc.subjectComputational fluid dynamics-
dc.subjectAnalytical model-
dc.subject.ddc623.8-
dc.titlePre-FEED 단계에서 개념적 화재 & 폭발 위험도 평가를 위한 기반 모델 개발-
dc.title.alternativeDevelopment of the Conceptual Fire & Explosion Risk Assessment-base model in Pre-FEED stage-
dc.typeThesis-
dc.contributor.AlternativeAuthorKyeongSuLee-
dc.description.degreeMaster-
dc.contributor.affiliation공과대학 조선해양공학과-
dc.date.awarded2017-08-
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