Astari, Asih (2020) Penilaian Risiko Pipa Gas Bawah Laut Akibat Aktivitas Kapal Di Area Dermaga. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pipa bawah laut masih menjadi moda transportasi yang paling efektif dan efisien dalam
menyalurkan gas bumi dalam jumlah besar dari lapangan gas tengah laut menuju fasilitas di
darat. Namun dalam operasinya terdapat beberapa bahaya yang dapat menyebabkan
kegagalan antara lain disebabkan oleh material pipa itu sendiri, korosi, kondisi lingkungan,
pihak ketiga, dll. Berdasarkan data historis, kegagalan terbesar pipa disebabkan oleh pihak
ketiga yaitu benturan dari suatu benda lain. PT X memiliki pipa bawah laut yang melewati
beberapa dermaga termasuk milik PT Y sehingga pipa tidak terbenam ini memiliki risiko
kegagalan akibat aktivitas kapal di sana. Penelitian ini bertujuan untuk menilai tingkat risiko
yang dialami pipa akibat kejatuhan jangkar, terseret jangkar, dan tertimpa kapal sehingga
hasilnya dapat menjadi dasar bagi perusahaan dalam mengambil keputusan. Penilaian risiko
ini mengacu pada DNV-RP-F107 Risk Assessment of Pipeline Protection. Tingkat risiko
didapatkan dari kombinasi tingkat frekuensi dan tingkat konsekuensi yang dimasukkan
dalam matriks risiko. Analisis frekuensi menggunakan metode Event Tree Analysis dengan
konsep penggabungan peluang. Ukuran konsekuensi yang digunakan adalah kerusakan pipa
yang direpresentasikan dengan rasio denting/ diameter pipa. Dari penilaian risiko yang telah
dilakukan, risiko pipa akibat kejatuhan jangkar berada pada tingkat acceptable dan ALARP,
risiko pipa akibat terseret jangkar berada pada tingkat ALARP dan unacceptable, dan risiko
pipa akibat tertimpa kapal berada pada unacceptable. Hasil penilaian risiko menunjukkan
perlunya langkah mitigasi seperti menambah perlindungan untuk pipa, membuat rambu
penunjuk adanya pipa, mengoperasikan kapal patroli, atau lainnya.
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The subsea pipeline is still the most effective and efficient mode of transportation in
channeling large amounts of natural gas from offshore gas field to onshore facilities. But in
its operation there are several hazards that can cause failures, such as caused by the pipe
material itself, corrosion, environmental conditions, third parties, etc. Based on historical
data, the biggest subsea pipeline failure caused by a third party is the impact of an object.
PT X has an subsea pipeline that passes through several ports, including those of PT Y, so
that the unburried subsea pipeline has the risk of failure due to vessel activities there. This
study aims to assess the level of risk experienced by the pipeline due to dropped anchor,
dragged anchor, and ship sinking so that the results can be the basis for the company in
making decisions. This risk assessment refers to DNV-RP-F107 Risk Assessment of
Pipeline Protection. The level of risk is derived from a combination of the frequency and
consequence levels included in the risk matrix. Frequency analysis uses the Event Tree
Analysis method with the concept of probabilities join. The consequence measure used is
pipe damage which is represented by the pipe denting/ diameter ratio. The results are
pipeline risk due to dropped anchor is acceptable and ALARP, pipeline risk due to dragged
anchor is ALARP and unacceptable, and pipeline risk due to ship sinking is unacceptable.
The results of the risk assessment indicate the need for mitigation steps such as adding
protection to the pipeline, making a signpost for the existence of the pipeline, operating a
patrol boat, or others.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | DNV-RP-F107,kejatuhan jangkar, penilaian risiko, pipa bawah laut, terseret jangkar, tertimpa kapal, dragged anchor, dropped anchor, risk assessment, ship sinking, subsea pipeline |
| Subjects: | T Technology > T Technology (General) > T174.5 Technology--Risk assessment. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Asih Astari |
| Date Deposited: | 07 Sep 2020 02:21 |
| Last Modified: | 28 Aug 2023 07:23 |
| URI: | http://repository.its.ac.id/id/eprint/81787 |
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