ANALISIS RISIKO DENGAN METODE HAZARD AND OPERABILITY STUDY (HAZOPS) DALAM PENENTUAN SAFETY INTEGRITY LEVEL (SIL) BERBASIS RISK GRAPH DAN QUANTITATIVE METHOD PADA UNIT BOILER PT X
Boiler is operated at high temperatures and pressures exceeding the standard so it has the risk of explosion. For this reason, boiler has automatic control systems to control high temperature and pressure hazards beyond the standards using Safety Instrumented Systems (SIS). The purpose of this study...
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| Format: | Theses |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/36855 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Boiler is operated at high temperatures and pressures exceeding the standard so it has the risk of explosion. For this reason, boiler has automatic control systems to control high temperature and pressure hazards beyond the standards using Safety Instrumented Systems (SIS). The purpose of this study is to determine Safety Integrity Level (SIL) which shows the performance of SIS on PT X boilers. The research methodology begins by analyzing risk using the hazard operability study method (Hazops) to obtain a risk score. The results of the Hazops method analysis showed the highest risk score on the final superheater and reheater boiler units of 25, while the evaporator score, the superheater low temperature, and the superheater platen were 20. The highest score was categorized as critical, so the risk was unacceptable and control must be done as soon as possible. The lowest risk for economists with a score of 10 is categorized as moderate, namely the possibility of failure if there is no control for 3 months. SIL determination uses two methods, namely the risk graph method and the quantitative method. Analysis with the risk graph method on the SIS boiler economizer unit shows that control can be done manually. While the determination SIL on evaporator and low temperature superheater results SIL 1. Risk graph analysis on the superheter platen boiler unit, final superheater, and reheater produces SIL 2 in all SIS in these 3 units. Quantitative determination of SIL on the platen superheater and final superheater shows SIL 1. The reheater unit shows SIL 2. The results of the analysis indicate that there is an increase from SIL 1 to SIL 2 on the platen superheater and final superheater by changing the safety instrumented function design and reducing calibration time from 1 year to 6 months. |
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