Arifin, Febrianaufal Izzan (2026) Studi Hazop Dan Sil Menggunakan Metode Fault Tree Analysis (FTA) Pada Proteksi Gas Turbine Trip Sebagai Saran Klasifikasi Interlock Protection Test. Project Report. [s.n.]. (Unpublished)
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Abstract
Gas Turbine pada pembangkit listrik tenaga gas dan uap dioperasikan pada kondisi temperatur dan tekanan tinggi sehingga memiliki potensi risiko keselamatan yang signifikan apabila terjadi kegagalan sistem. Penerapan Safety Instrumented System (SIS) serta pelaksanaan Interlock Protection Test secara berkala untuk menjamin keandalan fungsi proteksi sebelum unit dioperasikan. Penelitian ini dilakukan untuk mengidentifikasi tingkat bahaya, menentukan Safety Integrity Level (SIL), serta menyusun klasifikasi prioritas pelaksanaan Interlock Protection Test pada sistem proteksi Gas Turbine. Analisis bahaya dilakukan menggunakan metode Hazard and Operability Study (HAZOP) berdasarkan standar AS/NZS 4360:2004, sedangkan penentuan SIL dan seluruh rangkaian dalam menentukan SIL mengacu pada standar IEC 61025:2006, IEC 61508, dan ISA TR84.00.02-2:2002. Hasil analisis menunjukkan bahwa sembilan parameter kritikal telah diidentifikasi dengan tingkat risiko terdiri atas kategori High dan Extreme, di mana dua komponen berada pada kategori Extreme dan enam komponen lainnya berkategori High. Komponen dengan konfigurasi 2oo2 ditetapkan pada SIL 1, dengan menghasilkan nilai Probability Failure on Demand (PFD) sebesar 0,274245. Sedangkan pada 2oo3 ditetapkan pada SIL 2 dengan nilai PFD sebesar 0,07521. Berdasarkan integrasi hasil HAZOP dan SIL, klasifikasi prioritas Interlock Protection Test berhasil disusun menjadi 4 tingkat, yaitu Sangat Tinggi, Tinggi, Sedang, dan Rendah yang dapat digunakan sebagai saran pelaksanaan interlock protection test pada saat overhaul.
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Gas turbines in gas and steam fired power plants operate under high-temperature and high-pressure conditions, posing significant safety risks in the event of a system failure. The implementation of a Safety Instrumented System (SIS) and the periodic conduct of Interlock Protection Tests are essential to ensure the reliability of protective functions before the unit is put into operation. This study was conducted to identify hazard levels, determine the Safety Integrity Level (SIL), and establish a priority classification for conducting Interlock Protection Tests on the gas turbine protection system. The hazard analysis was performed using the Hazard and Operability Study (HAZOP) method based on the AS/NZS 4360:2004 standard, while the determination of the SIL and the entire process for establishing the SIL referred to the IEC 61025:2006, IEC 61508, and ISA TR84.00.02-2:2002 standards. The analysis results show that nine critical parameters were identified with risk levels falling into the High and Extreme categories, with two components in the Extreme category and the other six in the High category. The component with a 2oo2 configuration was assigned SIL 1, resulting in a Probability of Failure on Demand (PFD) value of 0.274245. Meanwhile, the 2oo3 configuration is set at SIL 2 with a PFD value of 0.07521. Based on the integration of the HAZOP and SIL results, the priority classification for the Interlock Protection Test was successfully organized into four levels: Very High, High, Medium, and Low, which can be used as guidelines for conducting the interlock protection test during an overhaul.
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