Marine Growth Protection System (MGPS) merupakan permesinan anti fouling digunakan untuk mencegah pertumbuhan biota laut dan karat yang berlebih pada sistem pendingin air laut. Tujuan dari penelitian ini adalah untuk mengetahui faktor turunnya kinerja MGPS, dampak dari faktor, dan upaya yang dilakukan untuk mengoptimalkan kinerja MGPS. Metode yang digunakan dalam penelitian ini adalah kualitatif, dengan menggunakan teknik analisa data Fishbone dan SHEL. Fishbone digunakan untuk menganalisis kemungkinan faktor masalah dan kemudian menganalisis dan mengkategorikan prioritas masalah menggunakan teknik SHEL. Hasil penelitian dapat disimpulkan bahwa turunnya kinerja MGPS disebabkan oleh kurang tepatnya pengaturan tegangan, penggunaan anoda yang melebihi batas umur, kondisi atau unsur air laut, dan kurangnya pengetahuan seorang engineer. Hal tersebut berdampak pada turunnya kinerja MGPS pada sistem pendinginan di kapal. Untuk mengatasi faktor-faktor tersebut dapat dilakukan dengan pengoperasian dan perawatan permesinan MGPS harus berdasarkan pada manual book, mengganti anoda yang sudah melebihi batas umur, serta memberikan training kepada engineer tentan permesinan MGPS
Auxiliary steam boiler system is always included in hazard identification process and risk operation. Hazard is a source of the damage of the human, process, properties and environment. The risk is an explanation of advantage or disadvantage possibility such as financial, physical damage, or accident as activity consequence. In this case, risk is the appeared consequences and likelihood. HAZOP (Hazard and Operability Study) method was used to identify hazard potency at Auxiliary steam boiler. HAZOP identification was determined by 11 (eleven) study nodes on Auxiliary steam boiler system. HAZOP characteristic is systematic; it uses structured or higher arrangement based on the instructions and HAZOP team’s idea to continue and make sure whether the safeguard is suitable for the object being tested. Further, two-sided risk computation was done on Auxiliary steam boiler system until the risk frequency and risk consequence were found. Research results indicated 11 (eleven) types of consequences with the highest level, which further needs mitigation process to decrease the risk level from Auxiliary steam boiler system. This is to prevent the change of risk of each study node for minimized risk.
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