Penilaian Risiko pada Persiapan Overhaul sebagai Mitigasi Awal untuk Optimalisasi Manajemen Outage di PLTU Rembang

Hananto, Kurniawan Dwi (2025) Penilaian Risiko pada Persiapan Overhaul sebagai Mitigasi Awal untuk Optimalisasi Manajemen Outage di PLTU Rembang. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PLTU Rembang, dengan daya terpasang 2x315 MW, adalah unit pembangkit strategis di Kabupaten Rembang yang mendukung stabilitas sistem kelistrikan Jawa bagian utara melalui IBT 150 kV. Tingkat keandalan pembangkit ini sangat penting, tetapi data Equivalent Availability Factor (EAF), Equivalent Forced Outage Rate (EFOR), Net Plant Heat Rate (NPHR), dan Capacity Factor (CF) menunjukkan bahwa proses overhaul terjadwal menghadapi tantangan signifikan, termasuk gangguan peralatan pasca overhaul. Hal ini berdampak pada penurunan keandalan operasi, kerugian produksi, dan risiko terhadap stabilitas kelistrikan. Penelitian ini bertujuan mengidentifikasi dan memetakan risiko utama operasional yang harus teridentifikasi saat persiapan overhaul, serta menganalisis penyebab dan dampaknya untuk mengembangkan langkah mitigasi yang komprehensif. Metode Failure Mode and Effects Analysis (FMEA) digunakan untuk mengidentifikasi mode kegagalan, sedangkan Risk Priority Number (RPN) membantu memprioritaskan risiko berdasarkan keparahan, frekuensi, dan deteksi. Untuk analisis mendalam, digunakan Fault Tree Analysis (FTA) untuk penyebab risiko dan Event Tree Analysis (ETA) untuk dampaknya. Risiko utama dipetakan menggunakan Risk Matrix berdasarkan pedoman Edaran Direksi PLN Nusantara Power Nomor: 0012.E/DIR/2024. Hasil penelitian menunjukkan bahwa risiko dominan yang teridentifikasi melalui Risk Matrix memiliki potensi signifikan terhadap penurunan keandalan unit dan gangguan operasional. Risiko-risiko ini perlu mendapat tindak lanjut berupa pemeriksaan lebih lanjut dalam siklus overhaul, guna memastikan kondisi peralatan tetap optimal.Sebagai langkah mitigasi, penelitian ini mengusulkan strategi berbasis pembobotan Analytic Hierarchy Process (AHP) untuk menentukan prioritas mitigasi yang paling efektif. Strategi mitigasi yang diusulkan mencakup pengujian dan asesmen, perbaikan atau penggantian peralatan kritis, untuk mendeteksi potensi kegagalan tersembunyi. Dengan metodologi yang diterapkan, penelitian ini memberikan rekomendasi strategis yang dapat diterapkan dalam perencanaan overhaul di PLTU Rembang, sekaligus menjadi referensi bagi pembangkit listrik lainnya dalam mengelola risiko operasional dan meningkatkan efektivitas manajemen outage.
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PLTU Rembang, with an installed capacity of 2×315 MW, is a strategic power generation unit that plays a vital role in maintaining the stability of the northern Java electricity system through the 150 kV IBT network. One of the critical processes in ensuring the reliability of the unit is the overhaul, which functions as a scheduled intervention to maintain optimal equipment performance. However, historical data indicate that despite being conducted on schedule, post-overhaul operational disturbances still occur, as reflected in the decline of key reliability indicators such as the Equivalent Availability Factor (EAF), Equivalent Forced Outage Rate (EFOR), Net Plant Heat Rate (NPHR), and Capacity Factor (CF). This condition highlights the presence of risks that have either not been identified or not effectively mitigated during the overhaul planning stage. This study aims to identify and map the main operational risks that arise during the overhaul planning phase, and to analyse their root causes and impacts in order to develop a more comprehensive mitigation strategy. The Failure Mode and Effects Analysis (FMEA) method is employed to identify failure modes, while the Risk Priority Number (RPN) is used to prioritize risks based on severity, occurrence, and detectability. Further analysis is conducted using Fault Tree Analysis (FTA) to trace the root causes of risk, and Event Tree Analysis (ETA) to model potential impacts. The identified risks are then mapped using a Risk Matrix based on the PLN Nusantara Power Board Circular No. 0012.E/DIR/2024.The findings of this research include a mapping of critical risks that can serve as a basis for developing a risk checklist for the overhaul planning stage, along with prioritized mitigation strategies formulated using the Analytic Hierarchy Process (AHP) weighting approach. These strategies comprise advanced testing, pre-overhaul condition assessments, and repair or replacement of critical equipment during the overhaul execution. The contribution of this study lies in its integration of quantitative methods (FMEA, FTA, ETA, and AHP) into a single, comprehensive, and practical risk analysis model that enhances outage risk management effectiveness and serves as a reference for other power plants in planning and executing more reliable overhauls.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Overhaul, FMEA, Manajemen Risiko, Risk Matrix, AHP
Subjects:	T Technology > T Technology (General) > T174.5 Technology--Risk assessment.
Divisions:	Interdisciplinary School of Management and Technology (SIMT) > 61101-Master of Technology Management (MMT)
Depositing User:	Kurniawan Dwi Hananto
Date Deposited:	14 May 2025 05:21
Last Modified:	14 May 2025 05:22
URI:	http://repository.its.ac.id/id/eprint/119064

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