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Abstrak :
Hidrokarbon merupakan bahan yang mudah terbakar yang dapat menyebabkan kecelakaan besar kecelakaan dan ledakan di instalasi anjungan lepas pantai pengolahan hidrokarbon. Kebakaran dan ledakan di anjungan lepas pantai adalah kecelakaan yang relatif jarang terjadi tetapi dapat memiliki konsekuensi tak terduga yang berdampak signifikan terhadap kematian dan kehilangan aset. Metode: Metode deskriptif dengan desain kuantitatif dari data sekunder tahun 2020 (cross sectional) dan studi literatur tanpa melakukan intervensi pada objek penelitian (non-experimental) dianalisis menggunakan perangkat lunak (PHAST) untuk mengevaluasi model konsekuensi kebakaran dan ledakan. Analisis frekuensi dengan metode fault tree dan event tree analysis, untuk menganalisa kemungkinan terjadinya overpressure dan terjadi nya kecelakaan besar pada fasilitas pengolahan hidrokarbon gas dan minyak di anjungan lepas pantai yang merupakan Major Hazard Plant. Hasil: Tingkat risiko tertinggi untuk kematian personel yang bekerja di anjungan lepas pantai tersebut berada pada tingkat ALARP Region dari kontributor skenario terbesar flash fire dengan jumlah fatality sebanyak 10 orang dan nilai frekuensi 3,26E-08/year artinya 1 dari 30.674.847 peluang skenario flash fire dalam 1 tahun dapat terjadi hingga menyebabkan kematian 10 orang, sedangkan risiko terhadap aset berada pada tingkat risiko yang dapat diterima/Acceptable dari kontributor skenario terbesar jet fire dengan nilai kehilangan aset sebesar 40.590.800,00 dan nilai frekuensi tertinggi 6,31E-08/year artinya 1 dari 15.847.861 peluang skenario jet fire dalam 1 tahun dapat terjadi hingga menyebabkan kehilangan aset sebesar $ 40.590.800 dari kebakaran dan ledakan skenario overpressure yang berpotensi terjadi di anjungan baru lepas pantai dengan mempertimbangkan beberapa sistem pengaman yang telah ditentukan dalam desain. Kesimpulan: Tidak diperlukan adanya tambahan mitigasi dikarenakan sistem pengaman yang telah ditentukan dalam desain cukup untuk mencegah kecelakaan besar yang dapat terjadi sehingga anjungan baru lepas pantai dinyatakan aman untuk dioperasikan ......Hydrocarbons are flammable materials can cause major accidents and explosions at offshore platform hydrocarbon processing. Fires and explosions on offshore platforms are relatively rare accidents but can have unforeseen consequences that can have a significant impact on fatality and loss of assets. Methods: Descriptive method with quantitative design from secondary data in 2020 (cross sectional) and literature study without intervention on the research object (non-experimental) using software (PHAST) to evaluate the consequences of fire and explosion models. Frequency analysis with fault tree and event tree analysis methods, to analyse the possibility of overpressure and major accidents events on offshore platforms hydrocarbon processing facilities which are Major Hazard Plants. Result: The highest risk level for the personnel fatality working on the offshore platform is in the ALARP Region level from the largest contributor to the flash fire scenario with the number of fatalities as many as 10 peoples and the frequency value of 3.26E-08/year means 1 out of 30,674,847 flash fire scenario opportunities in 1 year can occur to cause fatality of 10 people, while the risk to assets is in an acceptable risk level from the largest contributor to the jet fire scenario with loss of assets 40,590,800.00 and the highest frequency value is 6.31E-08/year) means that 1 in 15,847,861 opportunities of a jet fire scenario in 1 year can occur to cause asset loss of $ 40,590,800 from fires and explosions in overpressure scenarios that have the potential to occur on the new offshore platform taking into account some of the safety systems that have been defined in the design. Conclusion: There is no need for additional mitigation because the safety system that has been determined in the design is sufficient to prevent major accidents that can occur so that the new offshore platform is declared safe to operate

Abstrak :
[ABSTRAK
Risiko kebakaran dan ledakan mengakibatkan kerugian terhadap keselamatan pekerja, pencemaran lingkungan, kerusakan perangkat kerja dan kredibilitas perusahaan. Fasilitas gas memiliki risiko kebakaran dan ledakan karena natural gas merupakan highly flammable dari campuran metana (utama : 70-90%), etana dan sedikit senyawa lain. Oleh karena itu, sebagai dasar upaya pencegahan dan pengendalian terhadap konsekuensi yang ditimbulkan dari risiko kebakaran dan ledakan dengan menurunkan dampak/konsekuensi ketingkat yang bisa diterima (aceptable level) pada fasilitas pengolahan gas (separation system, gas processing system dan fuel gas system), diperlukan analisis semi-kuantitatif risiko kebakaran dan ledakan.

Teknik yang digunakan adalah melakukan analisis data sekunder (studi HAZID, studi HAZOP, Bow-tie Analysis dan simulasi PHAST). Hasil penelitian ini sebagai dasar upaya mengetahui faktor-faktor dominan yang menyebabkan kejadian kebakaran dan ledakan pada fasilitas pengolahan gas. Dari hasil simulasi crystal ball didapat total forecast memiliki angka 4.30 dimana jika dilihat di matriks resiko maka berada dilevel medium risk yang berati bahwa fasilitas pengolahan gas termasuk katagori risiko masih dapat diterima. Untuk sensitivity, perubahan tekanan (16.0%), perubahan suhu (15.9%) dan kelebihan tekanan (15.8%) merupakan faktor yang paling sensitif terhadap perubahan dibandingkan faktor-faktor lainnya. Selain itu, dapat membantu dalam menentukan rekomendasi yang tepat untuk diterapkan pada fasilitas pengolahan gas tersebut.

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ABSTRACT
Risk of fire and explosion resulted in the loss of the worker safety, environmental pollution, damage to the work and credibility of the company. Gas facility has a risk of fire and explosion because natural gas is a highly flammable mixture of methane (major: 70-90%), ethane and a bit of other compounds. Therefore, as a basis for prevention and control of the consequences arising from the risk of fire and explosion by reducing the impact / consequences to the level that can be accepted (aceptable level) with a precise cost on gas processing facilities (separation systems, gas processing system and fuel gas system), a semiquantitative analysis is required the risk of fire and explosion.

The technique used is to conduct a secondary data analysis (HAZID and HAZOP studies, Bow-tie Analysis and PHAST simulation). The results of this study as a basis for efforts to determine the dominant factors that cause the occurrence of fire and explosion at a gas processing facility. From the simulation results obtained crystal ball that total forecast has the number 4.30 which when seen in the risk matrix was at medium risk which means that the gas processing facility including the safe category/tolerable risk. For sensitivity, pressure changes (16.0%), themperature changes (15.9%) and excess pressure (15.8%), are the factors that are most sensitive to change than other factors. In addition, it can assist in determining the appropriate recommendations to be applied to the gas processing facility.;Risk of fire and explosion resulted in the loss of the worker safety, environmental pollution, damage to the work and credibility of the company. Gas facility has a risk of fire and explosion because natural gas is a highly flammable mixture of methane (major: 70-90%), ethane and a bit of other compounds. Therefore, as a basis for prevention and control of the consequences arising from the risk of fire and explosion by reducing the impact / consequences to the level that can be accepted (aceptable level) with a precise cost on gas processing facilities (separation systems, gas processing system and fuel gas system), a semiquantitative analysis is required the risk of fire and explosion. The technique used is to conduct a secondary data analysis (HAZID and HAZOP studies, Bow-tie Analysis and PHAST simulation). The results of this study as a basis for efforts to determine the dominant factors that cause the occurrence of fire and explosion at a gas processing facility. From the simulation results obtained crystal ball that total forecast has the number 4.30 which when seen in the risk matrix was at medium risk which means that the gas processing facility including the safe category/tolerable risk. For sensitivity, pressure changes (16.0%), themperature changes (15.9%) and excess pressure (15.8%), are the factors that are most sensitive to change than other factors. In addition, it can assist in determining the appropriate recommendations to be applied to the gas processing facility., Risk of fire and explosion resulted in the loss of the worker safety, environmental pollution, damage to the work and credibility of the company. Gas facility has a risk of fire and explosion because natural gas is a highly flammable mixture of methane (major: 70-90%), ethane and a bit of other compounds. Therefore, as a basis for prevention and control of the consequences arising from the risk of fire and explosion by reducing the impact / consequences to the level that can be accepted (aceptable level) with a precise cost on gas processing facilities (separation systems, gas processing system and fuel gas system), a semiquantitative analysis is required the risk of fire and explosion. The technique used is to conduct a secondary data analysis (HAZID and HAZOP studies, Bow-tie Analysis and PHAST simulation). The results of this study as a basis for efforts to determine the dominant factors that cause the occurrence of fire and explosion at a gas processing facility. From the simulation results obtained crystal ball that total forecast has the number 4.30 which when seen in the risk matrix was at medium risk which means that the gas processing facility including the safe category/tolerable risk. For sensitivity, pressure changes (16.0%), themperature changes (15.9%) and excess pressure (15.8%), are the factors that are most sensitive to change than other factors. In addition, it can assist in determining the appropriate recommendations to be applied to the gas processing facility.]