Analisis Risiko Instalasi Penurunan PLEM Dengan Pendekatan Metode Semi Kuantitatif

Sauqi, Saif Adam (2024) Analisis Risiko Instalasi Penurunan PLEM Dengan Pendekatan Metode Semi Kuantitatif. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Operasi penurunan pipeline end manifold memiliki peranan penting dalam keberhasilan instalasi subsea production system. Kegagalan sering terjadi jika operasi ini tidak dipersiapkan dengan baik. Oleh karena itu, penelitian ini melakukan studi analisis risiko secara semi kuantitatif terhadap operasi penurunan pipeline end manifold serta Memberikan mitigasi risiko yang dianalisis secara numerik. Analisis risiko dalam penelitian ini dilakukan dengan metode kualitatif dan kuantitatif. Identifikasi risiko dilakukan menggunakan fault tree analysis dan analisis risiko menggunakan failure mode effect analysis. Analisis risiko kuantitatif dilakukan untuk mengetahui probabilitas kegagalan saat penurunan pipeline end manifold. Penelitian ini meninjau tegangan sling dan kekuatan struktur pipeline end manifold saat kondisi penurunan. Setelah analisis risiko, mitigasi risiko dipaparkan dan dianalisis secara numerik untuk membuktikan efektivitas mitigasi tersebut. Penelitian ini mengidentifikasi 21 potensi bahaya pada waktu penurunan pipeline end manifold . Struktur terkena beban gelombang di daerah Splash zone memiliki probabilitas terbesar dengan nilai 2.7 x 10^-3 dan score risk priority number sebesar 60 (severity 4, Likelihood 5, Detection 3). Potensi kegagalan diuji secara numerik memiliki Probability of failure 4 x 10^-4 untuk potensi kegagalan akibat dari tegangan sling melebihi batas yang diizinkan dan Probability of failure 3 x 10^-2 untuk potensi kegagalan akibat dari tegangan struktur melebihi batas yang diizinkan. Mitigasi risiko dilakukan dengan melakukan perubahan properties sling, redesain spreader bar, dan penambahan sling lifting point dengan score yang didapat adalah 3, 3, dan 5. Sehingga mitigasi risiko secara kuantitatif yang dipilih adalah penambahan lifting point.
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Pipeline end manifold lowering operations play an important role in the successful installation of subsea production systems. Failures often occur if these operations are not properly prepared. Therefore, this research conducts a semi-quantitative risk analysis study of the pipeline end manifold lowering operation and provides numerically analyzed risk mitigation. The risk analysis in this study was conducted using qualitative and quantitative methods. Risk identification is carried out using fault tree analysis and risk analysis using failure mode effect analysis. Quantitative risk analysis is carried out to determine the probability of failure during the decline of the end manifold pipeline. This research reviews the sling tension and structural strength of the end manifold pipeline during lowering conditions. After the risk analysis, risk mitigations were presented and numerically analyzed to prove their effectiveness. This study identified 21 potential hazards during the decline of the pipeline end manifold. The structure exposed to wave loads in the Splash zone has the highest probability with a value of 2.7 x 10^-3 and a risk priority number score of 60 (severity 4, Likelihood 5, Detection 3). The potential failure tested numerically has a Probability of failure of 4 x 10^-4 for potential failure due to sling tension exceeding the permissible limit and Probability of failure of 3 x 10^-2 for potential failure due to structural stress exceeding the permissible limit. Risk mitigation is carried out by changing the sling properties, redesigning the spreader bar, and adding sling lifting points with the scores obtained are 3, 3, and 5. So that the quantitative risk mitigation chosen is the addition of lifting points.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Operasi Penurunan PLEM, Analisis risiko , FTA- FMEA, Semi Kuantitatif, PLEM lowering operation, Risk Assesment, FTA- FMEA, Semi Quantitative.
Subjects:	T Technology > T Technology (General) > T174.5 Technology--Risk assessment. T Technology > TA Engineering (General). Civil engineering (General) > TA169 Reliability (Engineering) T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Saif Adam Sauqi
Date Deposited:	25 Jul 2024 03:12
Last Modified:	25 Jul 2024 03:12
URI:	http://repository.its.ac.id/id/eprint/108861

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