ANALISIS MITIGASI DAN PEMETAAN DISPERSI GAS AMONIA PADA SKENARIO KEBOCORAN AMMONIA STORAGE TANK PT. PETROKIMIA GRESIK

Ahmad, Rizeki (2015) ANALISIS MITIGASI DAN PEMETAAN DISPERSI GAS AMONIA PADA SKENARIO KEBOCORAN AMMONIA STORAGE TANK PT. PETROKIMIA GRESIK. Diploma thesis, POLITEKNIK PERKAPALAN NEGERI SURABAYA.

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Abstract

ABSTRAK PT Petrokimia Gresik merupakan pabrik pupuk terlengkap di Indonesia karena memproduksi pupuk phonska, ZA, SP-36, NPK, TSP, Urea, DAP dan ZK selain itu juga memproduksi bahan kimia cair seperti CO2 cair, HCl, H 2SO 4, H3PO 4 , AlF3 dan Amonia cair. Amonia merupakan bahan kimia berbahaya dan beracun (B3). Risiko kebocoran amonia akan mengakibatkan bahaya kesehatan cukup tinggi jika terlepas ke lingkungan pabrik dan pemukiman warga, salah satu dampaknya yaitu iritasi pada mata. Oleh karena itu diperlukan suatu kajian untuk mengidentifikasi dan menganalisis risiko tersebut agar tindakan pencegahan dan pengendalian terhadap kebocoran amonia dapat disiapkan. Penelitian ini bertujuan untuk mengkaji tentang analisis risiko kebocoran tangki penyimpanan amonia PT Petrokimia Gresik. Risiko akan didapatkan dari kombinasi dampak dan peluang. Untuk mengidentifikasi dan menganalisa risiko – risiko tersebut dalam penelitian ini menggunakan analisis FMEA (Failure Mode & Effect Analysis) dan FTA (Fault Tree Analysis). FTA tersebut akan menghasilkan rangkaian basic cause yang membentuk minimal cut set, selanjutnya dilakukan perhitungan source model dan dispersion model untuk mengetahui kadar gas amonia tertinggi, tahap selanjutnya pemetaan dispersi gas amonia dengan menggunakan software ALOHA dan terakhir adalah penentuan langkah mitigasi. Dari hasil identifikasi risiko menggunakan FMEA dapat diketahui kemungkinan penyebab tangki bocor tertinggi adalah fail close Flow Control Valve dan dari pemetaan menggunakan software ALOHA dampak terbesar dari tangki bocor adalah penyebaran emisi gas amonia sejauh 10 km. Hasil analisis FTA didapatkan kombinasi minimal cut set paling kritis dari kebocoran tangki penyimpanan amonia adalah fail close Flow control valve, masalah mekanis pressure safety valve (PSV-872), Tangki 11-TK-801 korosi dan compressore refrigerant tidak bekerja secara maksimal. Untuk mitigasi struktural maupun mitigasi non struktural yang direkomendasikan berdasarkan hasil FMEA adalah pelatihan kepada pekerja, kalibrasi sesuai standar yang telah ditentukan dan preventive maintenance. Kata kunci: ALOHA, FMEA, FTA, Mitigasi, Risiko. ABSTRACT PT. Petrokimia Gresik is the most equipped fertilizer factory in Indonesia since it produces Phonska fertilizer, ZA, SP-36, NPK, TSP, Urea, DAP, and ZK, except those it also produces liquid chemical materials such as liquid CO 2, HCl, H2SO 4, AlF3, and liquid ammonia. Ammonia is dangerous and poisonous chemical material (B3). The risk of Ammonia leakage will result in high enough danger for health if it is released into factory environment and citizens’ residences; one of the effects is eye irritation. Therefore, a study is needed to identify and analyse the risk for the readiness of prevention and control of ammonia leakage. This research studied about the risk analysis of PT Petrokimia Gresik ammonia storage tank leakage. The risk could be obtained from the combination of impact and opportunity. To identify and analyse the risks in the study, analysis of FMEA (Failure Mode & Effect Analysis) and FTA (Fault Tree Analysis) were used. The FTA would result in the series of basic cause which formed minimal cut set to do mitigation steps, then source model and dispersion model calculations were done figure out the highest amount of ammonia gas, the next step was mapping of ammonia gas dispersion by using ALOHA software and the last step was the determination of mitigation steps. From the result of risk identification using FMEA, it can be seen that the highest possibility of tank leakage cause is fail close Flow Control Valve and from the mapping using ALOHA software the biggest impact of tank leakage is the spread of ammonia gas emission as far as 10 km. The result of FTA analysis was obtained the most critical minimal combination of cut set from ammonia storage tank leakage is fail close Flow Control Valve, mechanic trouble of pressure safety valve (PSV-872), tank (11-TK-801) corrosion and compressore refrigerant did not work optimally. For structural mitigation and non-structural mitigation which recommended based on the result of FMEA was training to the labourers, calibration was appropriate to the standard that has been determined and preventive maintenance. Key Words: ALOHA, FMEA, FTA, Mitigation, Risk.

Item Type: Thesis (Diploma)
Subjects: T Technology > T Technology (General)
Divisions: Teknik Keselamatan dan Kesehatan Kerja
Depositing User: Unnamed user with email repository@ppns.ac.id
Date Deposited: 28 Aug 2018 02:41
Last Modified: 28 Aug 2018 02:43
URI: http://repository.ppns.ac.id/id/eprint/170

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