Document Title
: Design Report / Study:
Remaining Life Assessment for 81-ZEG-001B at
BK - Belanak
MEPN Doc No.
: ID-F-BK-AE1-DRT-FP-81-0001
Originator
MEDCO Group Owner
Area
Location
System
:
:
:
:
:
PT. HAKIKI WIRA MANDIRI
UO-SEOFF-Asset & Operating Integrity
BK - Belanak
FP - Belanak FPSO
81- Main Power HV/MV
Document Type
Discipline / Sub discipline
Old Document No.
:
:
:
DRT-Design Report/Study
A-Asset Integrity/AE1-Electrical Equipment
-
1
IFU
23 Jan
2023
Issued for Use
Rev
Status
Issue Date
Description
Bayu J
Tunggul S
Elviandani
R. D.
Teuku
Ahmad
Haekal
Hendry
Novis
Prepared
Approved
Checked
Project Lead
Unit Owner
Contractor Approvals
MEDCO Approvals
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Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 2 of 35
Revision Sheet
Revision
1
Date
23 Jan 2023
Description of Change
Issued for Use
Additional Approvers (If Applicable)
Name
Designation
Gatot Sularso
Lead Electrical, Instrument
& Control
Bambang Sugianto
Senior Engineer Electrical
Signature
Date
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Remaining Life Assessment for 81-ZEG-001B at
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ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 3 of 35
DAFTAR ISI
1.
PENDAHULUAN ............................................................................................................................. 6
1.1.
1.2.
1.3.
1.4.
1.5.
1.6.
2.
LATAR BELAKANG ...................................................................................................................... 6
TUJUAN DOKUMEN .................................................................................................................... 6
RUANG LINGKUP DOKUMEN ....................................................................................................... 7
BATASAN .................................................................................................................................. 7
TANGGUNGJAWAB DAN KEPEMILIKAN .......................................................................................... 7
DOKUMEN REFERENSI ............................................................................................................... 8
METODOLOGI PENILAIAN SISA UMUR LAYAN (RLA) ............................................................... 9
2.1.
TINJAUAN DOKUMEN TEKNIS .................................................................................................... 10
2.2.
IDENTIFIKASI MEKANISME KEGAGALAN...................................................................................... 10
2.3.
PENILAIAN RISIKO .................................................................................................................... 12
2.3.1.
Penilaian Kemungkinan Kegagalan (PoF) .................................................................... 13
2.3.2.
Penilaian Konsekuensi Kegagalan (CoF) ..................................................................... 16
2.3.3.
Risiko Awal .................................................................................................................... 16
2.4.
PENILAIAN SISA UMUR LAYAN .................................................................................................. 19
2.5.
PENENTUAN INTERVAL DAN METODE PEMERIKSAAN .................................................................. 21
3.
HASIL PENILAIAN SISA UMUR LAYAN (RLA) ........................................................................... 21
3.1
TINJAUAN DOKUMEN TEKNIS .................................................................................................... 21
3.2
IDENTIFIKASI MEKANISME KEGAGALAN...................................................................................... 23
3.3
PENILAIAN RISIKO .................................................................................................................... 24
3.3.1
Temuan dan Hasil Pemeriksaan ................................................................................... 24
3.3.2
Rangkuman Hasil PoF .................................................................................................. 24
3.3.3
Rangkuman Hasil CoF .................................................................................................. 24
3.3.4
Hasil Risiko Saat Ini ...................................................................................................... 25
3.4
PENILAIAN SISA UMUR LAYAN .................................................................................................. 26
4.
KESIMPULAN DAN Saran ............................................................................................................ 27
4.1
KESIMPULAN ........................................................................................................................... 27
4.2
REKOMENDASI......................................................................................................................... 28
APPENDIX A – GENERATOR CHECKLIST ................................................................................................ 29
APPENDIX B – ASSESSMENT W ORKSHEET DISTRIBUTION ...................................................................... 30
APPENDIX C – RLA W ORKSHEET ......................................................................................................... 31
APPENDIX D – TECHNICAL DOCUMENT SUPPORT .................................................................................. 32
APPENDIX E – INSPECTION VISUAL ....................................................................................................... 36
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Remaining Life Assessment for 81-ZEG-001B at
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ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 4 of 35
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Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 5 of 35
1. Pendahuluan
1. Introduction
2.1. Latar Belakang
1.1. Background
Sebagai bagian dari Persyaratan untuk
As part of the requirements to apply for a
mengajukan Certificate of Inspection (COI)
Certificate of Inspection (COI) and also to
dan juga untuk memenuhi persyaratan
meet
peraturan pemerintah Indonesia terbaru,
Indonesian government regulations, namely
yaitu Peraturan Menteri Energi dan Sumber
the
Daya Mineral – PERMEN ESDM No. 32
Resources Regulation – PERMEN ESDM
Tahun
“Pemeriksaan
No. 32 of 2021 concerning "Safety Checking
Keselamatan Instalasi dan Peralatan Pada
of Installations and Equipment in Oil and
Kegiatan Usaha Minyak dan Gas Bumi”, PT.
Gas
Hakiki Wiramandiri diminta oleh Medco E&P
Wiramandiri was requested by Medco E&P
Natuna Ltd. untuk menyediakan Residual
Natuna
Life Assessment (RLA) untuk 81-ZEG-001B
Assessment
yang berlokasi di BK - Belanak Medco E&P
located at BK - Belanak Medco E&P Natuna
Natuna Ltd.
Ltd.
2021
tentang
2.1. Tujuan Dokumen
the
requirements
Minister
of
Business
Ltd.
to
of
Energy
and
Activities",
provide
(RLA)
the
PT.
latest
Mineral
Hakiki
Residual
for
Life
81-ZEG-001B
1.2. Purpose of Document
Tujuan dari dokumen ini yaitu:
The objectives of this document are:
• Sebagai dokumen pendukung penerbitan
• As
a
supporting
document
for
the
sertifikat Inspeksi (COI) dari Perusahaan
issuance of an Inspection Certificate
Inspeksi (PI).
(COI) from Perusahaan Inspeksi (PI).
• Melakukan pemetaan risiko agar dapat
• Conduct risk mapping in order to know
mengetahui profil risiko pada Power
the risk profile of the Power Generator
Generator dan dapat mengidentifikasi
and identify which Power Generator has a
Power Generator mana yang memiliki
higher risk level, including the remaining
level risiko lebih tinggi, termasuk sisa
life of the Power Generator.
• As a consideration for prioritizing risk
umur dari Power Generator.
• Sebagai
pertimbangan
untuk
mitigation plans as part of management.
memprioritaskan rencana mitigasi risiko
sebagai bagian dari manajemen.
2.1. Ruang Lingkup Dokumen
1.3. Scope of Document
Ruang lingkup pekerjaan pada dokumen ini
The scope of work of this document are:
adalah:
• Conduct RLA for 81-ZEG-001B based on
• Melakukan
RLA
untuk
81-ZEG-001B
berdasarkan PERMEN ESDM No. 32
PERMEN ESDM No. 32 tahun 2021.
• Review and update risks for the Power
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Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
tahun 2021.
Generator
terbaru,
Page 6 of 35
Generator based on the latest data,
• Meninjau dan memperbarui resiko untuk
Power
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
berdasarkan
aspek-aspek
yang
aspects to be analyzed:
data
-
Generators
akan
-
Method and Interval Inspection
dianalisis:
-
Generators
-
Method dan Interval Inspection
2.1. Batasan
1.4. Battery Limit
Batasan pada penilaian ini dimulai dari
The battery limit on this assessment starts
Seluruh pemeriksaan visual terhadap fisik
from all visual inspections of the Power
Power Generator (Appendix E. Inspection
Generator's physical condition (Appendix
Visual) dan memperhatikan pengukuran
E. Inspection Visual) and take notice to
temperature dan winding.
measurements
from
temperature
and
winding.
2.1. Tanggungjawab dan Kepemilikan
1.5. Responsibilities and Ownership
Manajer Asset & Operating Integrity –
The Surface Engineering Offshore – Asset
Surface Engineering Offshore merupakan
& Operating Integrity Manager is owner of
pemilik dari dokumen ini dan bertanggung
this document and is responsible for it
jawab atas pemeliharaanya.
maintenance.
Dokumen ini milik Tim Asset Integrity yang
This document belong to asset integrity
akan ditinjau oleh asset integrity engineer
team that will be reviewed by asset integrity
atau asset integrity lead dan disetujui oleh
engineer
or
asset
integrity
lead
manajer asset integrity. Dokumen kontrol
approved
by
asset
integrity
manager.
akan menyimpan dokumen yang telah
Document controller will keep approved
disetujui pada EDMS..
document on EDMS..
and
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Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
2.1. Dokumen Referensi
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 7 of 35
1.6. Reference Documents
Parent / Reference
Document No.
Document Title
Parent
OS Risk Management PRIME03-OS-01
Risk Methodology
Reference
Peraturan Menteri ESDM No. 32
tahun 2021
Inspeksi Teknis dan Pemeriksaan
Keselamatan Instalasi dan Peralatan
pada Kegiatan Usaha Minyak dan Gas
Bumi
Reference
Surat Edaran Dirjen MIGAS No.
12024/18.05/DMT/2013
Pemeriksaan Peralatan Operasi MIGAS
yang telah Melewati Umur Desain
(Design Life) dan yang Tidak Memiliki
Data
Reference
IEEE Std. 493 - 2007
IEEE Recommended Practice for the
Design of Reliable Industrial and
Commercial Power Systems
Reference
NFPA 70B – 2019
Recommended Practice for Electrical
Equipment Maintenance
Reference
ANSI/NETA MTS - 2019
Standard for Maintenance Testing
Specifications for Electrical Power
Distribution Equipment and Systems
Reference
IEC 60076-12 - 2008
Power transformers – Part 12: Loading
guide for dry-type power transformer
Reference
IEC 60034-3 - 2007
Rotating electrical machines – Part3:
Specific requirement for synchronous
generators driven by steam turbines or
combustion gas turbines
Reference
IEC 60034-1 - 2017
Rotatingelectrical machines – Part 1:
Rating and performance
Reference
API 579-1 - 2016
Fitness For Service
Reference
ID-F-BU-EE0-STS-GN-80-0007
Standard Specification :
Electrical Generators for Offshore
Service
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Remaining Life Assessment for 81-ZEG-001B at
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2. Metodologi Penilaian
Umur Layan (RLA)
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 8 of 35
Sisa 2. Residual Life Assessment
(RLA) Methodology
Sebagaimana tertulis dalam PERMEN ESDM
As written in PERMEN ESDM No. 32 tahun
No. 32 tahun 2021, peralatan yang telah
2021, equipment that has passed its design
melewati
umur
asalkan
dilakukan
tersebut.
Berikut
desain
dapat
digunakan
life can be used as long as an RLA is carried
pada
peralatan
out on the equipment. The following steps will
RLA
tahapan
yang
akan
be carried out in assessing the remaining
dilakukan dalam penilaian sisa umur layan
service life based on PERMEN ESDM No. 32
berdasarkan PERMEN ESDM No. 32 tahun
tahun 2021.
2021.
Determining
the
cause
of
failure
by
Menentukan penyebab kegagalan dengan
implementing root cause failure analysis
metode
root
cause
failure
analysis.
method. Failure determination is ideally done
Penentuan kegagalan
idealnya
dilakukan
by referring to maintenance data as well as
dengan mengacu pada data maintenance
performance
serta data unjuk kerja, data spesifikasi desain
specification data. Failure determination can
peralatan. Untuk penentuan kegagalan dapat
be done based on the failure description vs
dilakukan
failure
berdasarkan
panduan
failure
mode
data,
equipment
handbook
guide
design
of
each
description vs failure mode handbook dari
component which has information about the
masing-masing
common failure modes for that component.
komponen
yang
memiliki
informasi mengenai mode kegagalan yang
umum bagi komponen tersebut.
Start
Inspection
Method and
Interval
Determinantion
Technical
Document
Review
Failure
Identification
Residual Life
Assessment
Risk
Assessment
Inspection
Scope
Determination
Fitness For
Services or
Other Method
Figure 2.1 RLA Workflow Based On PERMEN ESDM No. 32 tahun 2021
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Remaining Life Assessment for 81-ZEG-001B at
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2.1. Tinjauan Dokumen Teknis
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 9 of 35
2.1. Technical Document Review
Langkah pertama untuk melakukan penilaian
The first step to conduct remaining life
sisa
dan
assessment is to collect and review technical
meninjau dokumen teknis. Kategori dokumen
documents. Reviewed technical document
teknis yang ditinjau adalah:
categories are:
1. Data dan dokumen Power Generator
1. Power Generator data and document
2. Dokumen penilaian risiko
2. Risk assessment document
Detail dari kedua dokumen tersebut sudah
Detail of both documents is already written
tertulis dalam checklist dan dapat dilihat pada
into a checklist and can be seen in Appendix
Lampiran A.
A.
umur
adalah
mengumpulkan
2.2. Identifikasi Mekanisme Kegagalan
2.2. Failure Mechanism Identification
Kemungkinan mekanisme kerusakan pada
Possible mechanism of failure to the Power
Power Generator dapat dikembalikan Kembali
Generator
kepada
sudah
manufacturers/vendors who have calculated
yang
the age of the machine/equipment they have
mereka buat. Namun, untuk memastikan agar
manufactured. However, to ensure that the
umur desain peralatan dapat tercapai perlu
design life of the equipment can be achieved,
dilakukan operasi dan pemeliharaan dengan
it is necessary to carry out operation and
pola yang baik. Ada ketidakpastian bila
maintenance with a consistent pattern. There
menentukan usia pakai dan rusak tidaknya
is uncertainty when determining the service
suatu komponen mesin/peralatan bila hanya
life and whether or not a machine/equipment
berdasarkan waktu operasi.
component is failured if it is only based on
produsen/vendor
menghitung
usia
yang
mesin/peralatan
can
be
traced
back
to
the
operating time.
Semua benda yang bergerak selalu memiliki
titik lelah (fatigue). Suatu alat yang telah
All moving objects always have a fatigue
mencapai titik lelahnya, jika tidak ditangani
point. A tool that has reached its fatigue point,
dengan
suatu
if not handled properly, will fail. The causes of
kegagalan (failure). Penyebab dari kegagalan
failure also vary for each device. To be able
juga bervariasi untuk setiap alat. Untuk dapat
to determine the cause of a failure, it is
menentukan
kegagalan
necessary to carry out a failure analysis in
sangat perlu dilakukan analisis terhadap
order to identify and differentiate the causes
kerusakan
and mechanisms of failure.
tepat
akan
penyebab
(failure
mencapai
suatu
analysis)
agar
dapat
mengetahui dan membedakan penyebab dan
For industries that have not experienced the
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Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 10 of 35
impact of machine or industrial equipment
mekanisme terjadinya kegagalan.
failures, it is very necessary to anticipate the
Bagi industri yang belum mengalami dampak
dari kegagalan mesin atau alat industri, sudah
sangat perlu untuk mengantisipasi terhadap
kemungkinan
dapat
terjadinya
merugikan
terhambatnya
pihak
produksi
possibility of failures that can harm the
industry due to production delays that should
be running smoothly.
kegagalan
yang
industri
karena
Several studies have shown that the cost of
seharusnya
tool life extension (maintenance) is only
yang
around 20% - 30% of the total cost of building
berjalan dengan lancar.
a
Beberapa studi membuktikan bahwa biaya
dari perpanjangan umur alat (maintenance)
hanya sekitar 20% - 30% dari total biaya
pembangunan
industri
baru.
Pengertian
“perpanjangan umur” sering disalahpahami.
Tujuan kegiatan perpanjangan bukan untuk
melanjutkan operasi pabrik di luar masa
produksi, tetapi hanya untuk memastikan alatalat
dapat
dimanfaatkan
penuh
sesuai
dengan perhitungan masa produksi. Cara ini
bertujuan untuk menghindari kegagalan dini
new
industry.
extension"
is
The
often
definition
of
"life
misunderstood.
The
purpose of extension activities is not to
continue
factory
operations
beyond
production period, but only to ensure that the
equipment can be fully utilized in accordance
with the calculation of the production period.
This method aims to avoid premature failure
of the tools. The actual working life of
industrial equipment may exceed the working
life specified by the tool manufacturer (design
data).
dari alat-alat. Umur kerja dari alat industri
sebenarnya dapat melebihi umur kerja yang
telah
ditetapkan
produsen
alat
the
tersebut
(design data).
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Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
2.3. Penilaian Risiko
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 11 of 35
2.3. Risk Assessment
Penilaian risiko akan dilakukan dengan
Risk assessment will be conducted using
menggunakan metode kualitatif
semi-quantitative method by multiplying the
dengan
mengalikan kemungkinan kegagalan (PoF)
probability
dan konsekuensi kegagalan (CoF). Analisis
consequence of failure (CoF). The semi-
risiko
pada
quantitative risk analysis is applied to Power
tersebut
Generator in section-by-section increments.
kualitatif
akan
diterapkan
Generator.
Pendekatan
mengadopsi
matriks
konsekuensi
The
of
failure
approach
(PoF)
adopts
and
Medco
the
E&P
kegagalan dan risiko milik Medco E&P atau
consequences of failure and risk matrices or
menerapkan
applies
dalam
pedoman
praktik
yang
yang
ditetapkan
direkomendasikan
guidelines
specified
within
the
international recommended practices. In the
secara internasional. Dalam analisis risiko
semi-quantitative
kualitatif,
kemungkinan
probability of failure is determined by
ditentukan
dengan
kegagalan
mempertimbangkan
considering
risk
various
analysis,
factors
that
the
are
berbagai faktor yang dikategorikan menjadi
categorized into time dependent and time
ancaman
yang
pada
independent threats. The safety, financial,
operasional
dan
tidak
environmental,
bergantung
ancaman
yang
and
reputation
bergantung pada operasional. Konsekuensi
consequences are the factors that affect the
terhadap
consequence of failure.
keselamatan,
finansial,
lingkungan, dan reputasi adalah faktorfaktor yang mempengaruhi konsekuensi
Detail Power Generator risk assessment
kegagalan.
methodology for Medco E&P has been
written
Detail metodologi penilaian risiko Power
in the “OS Risk
Management
PRIME-03-OS-01”.
Generator untuk Medco E&P telah tertulis
dalam dokumen “OS Risk Management
PRIME-03-OS-01”.
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Remaining Life Assessment for 81-ZEG-001B at
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2.3.1. Penilaian Kemungkinan Kegagalan
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 12 of 35
2.3.1 Probability
of
Failure
(PoF)
(PoF)
Assessment
Berikut merupakan bagian dari faktor-
The following is part of the factors that
faktor yang mempengaruhi kemungkinan
affect the probability of failure (PoF) of
kegagalan (PoF) dari Power Generator
the Power Generator (risk assessment
(bagian
section) can be categorized into:
assessment
resiko)
dapat
 Operational Dependent Threats
dikategorikan menjadi:
 Ancaman Tergantung Operasional:
o
Vibration
o
Vibration
o
Overheating
o
Overheating
o
Out of Adjustment
o
Out of Adjustment
o
Mechanical Failure
o
Mechanical Failure
o
Fatigue/Overstress
o
Fatigue/Overstress
o
Corrosion
o
Corrosion
o
Contamination
o
Contamination
o
Burst
o
Burst
o
Breakage
o
Breakage
o
Blockage
o
Blockage
 Ancaman
 Non-Operational Dependent Threats
o
Software Failure
Operasional:
o
Short circuiting
o
Software Failure
o
No Signal
o
Short circuiting
o
No Power
o
No Signal
o
External Influence
o
No Power
o
Erosion
o
External Influence
o
Electrical Failure
o
Erosion
o
Clearance
o
Electrical Failure
o
Clearance
Tidak
Tergantung
Table 2. 1 Probability of Failure Description
PoF
Very Unlikely
Unlikely
Possible
Likely
Combined Probability Level Description
Very unlikely to occur during the operational life of the facility.
Accident: Never happened in other Company
Quantitative: < 10-5
Unlikely to occur during the operational life of the facility.
Accident: Ever happened in another Company
Quantitative: 10-5 - < 10-3
Likely to occur during the operational life of the facility.
Accident: Ever happened in Medco E&P Natuna
Quantitative: 10-3 - <10-1
Likely to occur repeatedly during the operational life of the facility.
Accident: Ever happened in Asset / Location
Quantitative: >= 10-1
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ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 13 of 35
Aturan yang sama juga berlaku untuk
The same rule applies for calculating the
menghitung faktor kemungkinan dan
probability factor and the PoF from Non-
PoF dari Ancaman Tidak Tergantung
Operational Dependent Threats.
Operasional.
The overall PoF of offshore Power
Keseluruhan PoF dari Power Generator
Generator will be taken as a maximum of
akan
PoF from Time and Non-Operational
diambil
maksimum
PoF
dari
Ancaman Tergantung Opearional dan
Dependent Threats.
Ancaman Tidak Tergantung Opearional.
bahwa
PoF
It is important to note that the combined
yang
tidak
PoF is that of non-adjusted PoF. The
penyesuaian
amount of adjustment is affected by
dipengaruhi oleh Faktor Keyakinan dan
Confidence Factor and Time Since
Waktu Sejak Pemeriksaan Terakhir.
Last Inspection. After the adjustment,
Setelah dilakukan penyesuaian, PoF
the Current PoF will be used later to
Saat Ini akan digunakan nantinya untuk
determine the Current Risk (Figure
menentukan Risiko Saat Ini (Gambar
2.2).
2.2).
Detail
Penting
untuk
gabungan
disesuaikan.
dicatat
adalah
PoF
Besarnya
Penjelasan
detail
terkait
explanation
of
specific
PoF
Perhitungan PoF secara spesifik dapat
Calculation may be referred to “OS Risk
mengacu pada Dokumen “OS Risk
Management PRIME-03-OS-01”.
Management PRIME-03-OS-01”.
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Page 14 of 35
Probability of Failure
Consequence of Failure
Operational Dependent Threats
Kesehatan dan Keselamatan Kerja
Vibration
Keselamatan Proses
Overheating
Lingkungan
Out of Adjustment
Kerugian Finacial
Mechanical Failure
Biaya Tambahan
Fatigue/Overstress
Project
Corrosion
PSC Non-Cost Recovery
Contamination
Reputasi
Burst
Legal
Breakage
Notifikasi Publik
Blockage
Socio-Cultural Economic
Keanekaragaman Hayati
Non Operational Dependent Threats
Industrial Hygiene-Exposure
Software Failure
Short circuiting
No Signal
No Power
External Influence
Erosion
Electrical Failure
Clearance
Confidence Factor
Initial Risk
- Risk Confidence
- Remnant Life Confidence
- FFS Confidence
Current
Risk
Current PoF
Current Inspection
Interval
YES
Risk
Acceptable?
NO
DetailedO
Assessment
Figure 2.2 Workflow Risk Assessment
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2.3.2. Penilaian Konsekuensi Kegagalan
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 15 of 35
2.3.2. Consequence
of
Failure
(CoF)
(CoF)
Assessment
Konsekuensi Kegagalan (CoF) Power
A Generator Consequence of Failure
Generator
(CoF) is determined using factors shown
dapat
ditentukan
yang
in Figure 2.2.
sama
The value of Power Generator CoF
dengan nilai maksimum dari faktor-
equals to the maximum value of its
faktornya,
factors, which can be expressed as:
menggunakan
faktor-faktor
ditunjukkan pada Figure 2.2.
Nilai
CoF
Power
yang
Generator
dapat
dinyatakan
sebagai berikut:
Skenario konsekuensi kegagalan untuk
The consequence failure scenario for
setiap
oleh
each
yang
governing Probability of Failure instead
faktor
Kemungkinan
ditentukan
Kegagalan
berpengaruh, bukan skenario kegagalan
factor
is
determined
by
the
of worst-case failure scenario.
untuk kasus terburuk.
2.3.3. Risiko Awal
2.3.3. Initial Risk
Secara umum, risiko adalah kombinasi
Generally, risk is the combination of the
dari kemungkinan beberapa peristiwa
probability of some events leading to
yang
menyebabkan
yang
failure occurring during a time period of
terjadi
selama
yang
interest and the failure consequences
kegagalan
periode
waktu
diinginkan dan konsekuensi kegagalan
associated
yang terkait dengan peristiwa tersebut.
mathematical
Dalam istilah matematika, risiko dapat
expressed as:
with
the
terms,
risk
event.
In
can
be
dinyatakan sebagai berikut:
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Page 16 of 35
ini,
In the present risk assessment, the
kombinasi PoF dan CoF menghasilkan
combination of PoF and CoF results in
Risiko Awal, yaitu tingkat risiko yang
the Initial Risk, which is a level of risk
dihitung berdasarkan pengetahuan dan
calculated
kondisi Power Generator saat ini tanpa
knowledge and condition of the Power
memperhitungkan
Generator without taking into account
Dalam
penilaian
risiko
saat
durasi
sebenarnya
based
on
the
current
actual duration since the last inspection
sejak pemeriksaan terakhir dilakukan.
was performed.
Risiko Awal akan digunakan bersama
untuk
The Initial Risk will be used together
Pemeriksaan
with the Confidence Factor to generate
Saat Ini. Waktu Sejak Pemeriksaan
the Current Inspection Interval. The
Terakhir, yaitu selang waktu (dalam
Time Since Last Inspection, which is
tahun)
antara
an interval of time (in years) between the
terakhir
dengan
tanggal
penilaian,
last inspection date and assessment
dibagi
dengan
Interval
date, is then divided by the Current
dengan
Faktor
menghasilkan
kemudian
Pemeriksaan
mendapatkan
Pemeriksaan.
Keyakinan
Interval
tanggal
pemeriksaan
Saat
Ini
Rasio
Selain
itu,
untuk
Interval
rasio
ini
digunakan untuk menyesuaikan PoF
Inspection
Interval
to
obtain
the
Inspection Interval Ratio. Moreover,
this ratio is used to adjust the PoF
resulting in the Current Risk.
yang menghasilkan Risiko Saat Ini.
The risk matrix that will be used in this
Matriks risiko yang akan digunakan
assessment will refer to the Medco E&P
dalam penilaian ini akan mengacu pada
Safety and Risk Acceptance Standards
Medco E&P Safety and Risk Acceptance
and Guidance Philosophy that show in
Standards and Guidance Philosophy
Figure 2.3.
yang ditunjukkan pada Gambar 2.4.
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Page 17 of 35
Figure 2.3 Medco E&P Risk Matrix
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2.5. Penilaian Sisa Umur Layan
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 18 of 35
2.4. Residual Life Assessment
Langkah selanjutnya adalah menghitung
Next step is calculating the residual life of
sisa umur Power Generator. Residual Life
Power
Assessment merupakan cara yang tepat
Assessment is the ideal way to calculate the
dalam
mana
extent to which equipment can operate
peralatan dapat beroperasi secara layak
properly and meet standards. Residual Life
dan
Life
Assessment should be applied to all existing
Assessment sebaiknya diterapkan pada
facilities and will be reused in the new work
semua
akan
plan. For this reason, all recorded data must
digunakan kembali pada rencana kerja
always be made with a good storage
baru. Untuk itu semua data yang dicatat
system so that the residual life assessment
harus
sistem
for the next work plan can be carried out
penyimpanan yang baik agar residual life
accurately, because the completeness and
assessment
accuracy of the data greatly determines the
memperhitungkan
memenuhi
fasilitas
selalu
sejauh
standar.
yang
Residual
ada
dibuat
dan
dengan
untuk
rencana
kerja
Generator.
Residual
Life
selanjutnya dapat dilakukan dengan akurat,
prediction results.
karena
The residual life of Power Generator can be
kelengkapan
dan
akurasi
data
sangat menentukan hasil prediksi Sisa umur
determined using:
Power Generator dapat ditentukan dengan
menggunakan:
k=180000xa-1xe(-b/T)
Lc=kxt
Dimana,
Where,
a
: Arrhenius’ equation Constant
a
: Arrhenius’ equation Constant
b
: Arrhenius’ equation
b
: Arrhenius’ equation
Temperature
T
: Hotspot Thermodinamic
Temperature
T
Temperature (273+VHSn)
: Hotspot Thermodinamic
Temperature (273+VHSn)
Va
: Ambient Temperature
Va
: Ambient Temperature
VHSn
: Hotspot Temperature
VHSn
: Hotspot Temperature
t
: Loading Time
t
: Loading Time
k
: Ageing Rate
k
: Ageing Rate
Lc
: Lifetime Consumption
Lc
: Lifetime Consumption
*IEC 60076-12-2008; 5.2 Loading Time
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Dengan
menggunakan
Page 19 of 35
konstanta
Using the Arrhenius constant table, the
Arrhenius, range suhu dapat dikategorikan
temperature range can be categorized
berdasarkan suhu system insulasi. Dalam
based on the temperature of the insulation
konteks
yang
system. In this context the Power Generator
155oC,
operates in the temperature range of 155oC,
sehingga nilai digunakan adalah a=9.60E-
so the values used are a=9.60E-17 and
17 dan b=20475 K (Kelvin). Rumus yang
b=20475 K (Kelvin). The formula formed
dibentuk menggunakan nilai 180000* jam
uses the value of 80000* hours as the
sebagai usia rata-rata Power Generator
average age of the Power Generator
yang beroperasi dalam kondisi dibawah full
operating under full load conditions (IEC
load (IEC 60076-12-2008). Nilai rated hot-
60076-12-2008).
spot
temperature value in table 2.3 shows the
ini
beroperasi
Power
dalam
table
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Generator
range
temperature
pada
suhu
table
2.3
The
average
beroperasi, dimana adanya perubahan suhu
generator, where a change in temperature
6oC dapat berdampak pada penuaan Power
of 6oC can have an impact on the aging of
Generator,
Power
the Power Generator, it is assumed that the
Generator yang beroperasi bisa menembus
age of the Power Generator in operation
usia pengunaan diatas 10 tahun (IEC
can exceed the age of use over 10 years
60076-12-2008).
(IEC 60076-12-2008).
usia
temperature
hot-spot
menunjukkan rata-rata suhu generator yang
diasumsikan
operating
rated
of
*Medco Design Life assumption
Table 2. 2 Constant Lifetime Equation
Arrhenius’ equation Constants
Insulation System
Temperature
(Thermal Class)
Rated
HotSpot
Temperature
VHSn
a
b
oC
h
K
oC
105 (A)
3,10E-14
15 900
95
120 (E)
5,48E-15
17212
110
130 (B)
1,72E-15
18115
120
155 (F)
9,60E-17
20475
145
180 (H)
5,35E-18
22979
170
200
5,31E-19
25086
190
220
5,26E-20
27285
210
Note : IEC 60076-12-2008; 5.2 Lifetime table 1)
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2.5. Penentuan Interval dan Metode
Pemeriksaan
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 20 of 35
2.5. Inspection Interval and Method
Determination
 Determining the method and interval for
Penentuan
interval
dan
metode
pemeriksaan
dapat
dilakukan
dengan
inspection
Generator
categorizing
mengkategorikan
berdasarkan
Power
risikonya.
Tindakan
yang
can
be
the
conducted
Power
by
Generator
based on its risk. The most common
paling umum adalah pemeriksaan, dimana
measure
bagian
section details the inspection planning.
ini
pemeriksaan.
merinci
perencanaan
Disarankan
untuk
is
inspection,
inspection as follows :
berikut:
-
Visual Inspection: 2024
Visual Inspection: 2024
Follow the maintenance program
Mengikuti program maintenance
from the user or do it every year
dari user atau dilakukan setiap
(Annually) – reference Std/Code
tahun
–
(Annually)
NFPA 70B – 2019 (Annex L
referensi
Std/Code NFPA 70B – 2019
(Annex L Maintenance Intervals)
-
this
Recommended to schedule the next
menjadwalkan Inspeksi berikutnya sebagai
-
which
Maintenance Intervals)
-
Online Inspection: 2024
Online Inspection: 2024
Thermography Inspection every
Thermography Inspection setiap
year
–
Annually
–
reference
referensi
Std/Code NFPA 70B – 2019
Std/Code NFPA 70B – 2019
(Annex L Maintenance Intervals) &
(Annex L Maintenance Intervals)
Standard for Infrared Inspection of
&
Electrical
tahun
Annually
Standard
for
Infrared
Inspection of Electrical Systems
Systems
&
Rotating
Equipment – 2008.
& Rotating Equipment – 2008.
3. Hasil Penilaian
Layan (RLA)
Sisa
Umur 3. Residual Life
(RLA) Results
3.1 Tinjauan Dokumen Teknis
Assessment
3.1. Technical Document Review
Berikut spesifikasi 81-ZEG-001B di BK -
The following is the Power Generator
Belanak yang ditunjukkan pada Tabel 3.1.
specification of 81-ZEG-001B at BK Belanak that show in Tabel 3.1.
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Page 21 of 35
Table 3. 1 Generator Specification Data
Tag Number
Serial Number
Description
Location
Construction Type
Data Reference
Year Built / Year Used
Construction Code
Power (MVA)
Rated Voltage (V)
Phase
Insulation Class
Frequency (Hz)
Safety Devices
Rated Current (A)
Sebelum
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
melakukan
penilaian,
81-ZEG-001B
011075-04
Power Generator
Medco E&P Natuna Ltd
Gas Turbine
Inspection 2019
2002 / 2002
IEC
17,50
13800
3
F
60
Circuit Breaker and Protection Relay
732,00
At
the
beginning
of
the
assessment,
pengumpulan dan penelaahan data teknis
collecting and reviewing technical data and
dan
harus
document of Power Generator must already
sudah dilakukan. Berikut adalah beberapa
be conducted. The following are several
data dan dokumen teknis yang harus
technical
ditinjau:
subjected to review:
dokumen
Power
Generator
data
and
document
that
Table 3. 2 Technical Document Review
No
Technical Document
1
2
3
4
5
Generator Design
Drawing
Previous Certification Report
Inspection History/ Record
Maintenance report
Need fo risk Assessment document
-Occupational safety and health
-Process Safety
-Enviromental
-Financial Cost
-Additional Cost
-Project delay
-PSC Non-cost Recovery
-Reputation
-Legal
6
Available
Not
Available
√
√
√
√
√
√
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is
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ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 22 of 35
-Public notification
-Socio cultural economic
-Biodiversity
-Industrial hygine – exposure incident
Seluruh dokumen yang telah direview dapat
Detail of all reviewed documents is already
dilihat pada Lampiran A.
written into checklist and can be seen in
Appendix A.
3.2 Identifikasi Mekanisme Kegagalan
Mekanisme kegagalan dari 81-ZEG-001B di
BK - Belanak dapat ditentukan berdasarkan
kondisi
operasi
saat
ini
dan
catatan
inspeksi. Seperti disebutkan sebelumnya,
kemungkinan mekanisme kerusakan untuk
Power
Generator
dapat
dikategorikan
menjadi:
3.2. Failure Mechanism Identification
Failure mechanism of 81-ZEG-001B at BK Belanak can be determined based on its
current operating condition and inspection
record. As previously mentioned, possible
failure mechanism for Power Generator may
be categorized into:
1. Operational dependent
2. Operational independent
1. Tergantung Operasional
2. Tidak tergantung Operasional
The detail of the failure mechanism of both
Detail mekanisme kegagalan dari keduanya,
tergantung operasional dan tidak tergantung
time dependent and time independent can
be seen in Figure 2.2
operasional dapat dilihat pada Gambar 2.2.
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3.3.1. Inspection Findings and Result
Temuan dan Hasil Pemeriksaan
 Berdasarkan
Page 23 of 35
3.3. Risk Assessment
3.3 Penilaian Risiko
3.3.1
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
hasil
 Based on the results of the latest
pemeriksaan
vibration check in December 2022,
vibrasi terbaru pada Desember 2022,
the Power Generator is adequately
Power Generator cukup terlindungi
protected from vibration Appendix D.
dari geteran (Lampiran D).
 Berdasarkan
hasil
Temperature
 Based on the results of the latest
pemeriksaan
Temperature inspection in January
terbaru pada Januari
2023, Power Generator tidak terlalu
berdapak significant pada saat proses
operasional (Lampiran D).
3.3.2
tergantung
the
Power
having
a
very
during
the
Generator
significant
operational
not
impact
process
Appendix D.
Rangkuman Hasil PoF
Tidak
2023,
3.3.2. Summary of PoF Result
Operational
adalah
The time independent of PoF factors in
faktor PoF dalam 81-ZEG-001B yang
81-ZEG-001B is driven by operational
dipengaruhi oleh faktor-faktor interferensi
factor. Summary of the key driving
non-operational dapat dilihat sebagai
factors for 81-ZEG-001B can be seen in:
berikut:
Table 3. 3 Summary of PoF Assessment
Generator
81-ZEG001B
Primary PoF
Key Drivers
Factor(s)
Value
NonOperational
1
Operational Dependent
Ever happened in another company*
*Medco E&P Safety and Risk Acceptance Standards and Guidance Philosophy
3.3.3
Rangkuman Hasil CoF
Seperti
yang
dijelaskan
3.3.3. Summary of CoF Result
sebelumnya
As previously described in the section
pada bagian 2.5.1, ada beberapa faktor
2.5.4, there are some factors that is
yang dipertimbangkan untuk menentukan
considered to determine CoF, Following
CoF. Berikut ringkasan Penilaian CoF
is the summary of CoF Assessment for
untuk
81-ZEG-001B
81-ZEG-001B
dengan
sebesar USD 184.166,6666666667.
LPO
with
LPO
USD
184.166,6666666667.
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ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 24 of 35
Table 3. 4 Summary of CoF Assessment
Consequence
Generator
Primary CoF
Factors
81-ZEG001B
Safety and
Reputation
CoF
Score
Key Drivers
3
US $ 100000<loss<US $ 1 million*
*Medco E&P Safety and Risk Acceptance Standards and Guidance Philosophy
3.3.4
Hasil Risiko Saat Ini
3.3.4. Current Risk Result
Setelah mendapatkan skor PoF dan skor
After getting the PoF score and CoF
CoF, maka harus diplotkan ke dalam
score, then it must be plotted into Medco
matriks risiko Medco E&P Natuna Ltd
E&P Natuna Ltd risk matrix as previously
seperti yang telah dijelaskan sebelumnya
described in Figure 2.3. Following is the
pada Gambar 2.4. Berikut ringkasan
summary of risk assessments of 81-ZEG-
penilaian risiko 81-ZEG-001B.
001B.
Table 3. 5 Summary of Risk Assessment
Generator
81-ZEG-001B
PoF
CoF
PoF Driver
Score
CoF Driver
Score
NonOperational
1
Financial Loss
3
Current Risk
LOW (3)*
*Sesuai dengan standar Medco E&P Natuna Ltd HSE, risiko
*In accordance with Medco E&P Natuna Ltd HSE,
“MEDIUM” harus dikelola menggunakan pencegahan dan/atau
“MEDIUM” risk are required to be managed using prevention
mitigasi dengan prioritas. Risiko dapat ditoleransi, jika terbukti
and/or mitigation with priority. Risk may be tolerable, if
ALARP.
demonstrated to be ALARP.
** Berdasarkan Peraturan Menteri ESDM No. 32 tahun 2021 untuk dapat
** Based on Minister of Energy and Mineral Resources Regulation No. 32 of
menampilkan nilai resiko dari setiap unit peralatan diluar sisa umur.
2021 to be able to display the risk value of each unit of equipment beyond of
residual life.
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ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 25 of 35
3.4. Residual Life Assessment
3.4 Penilaian Sisa Umur Layan
The residual life of 81-ZEG-001B can be
Sisa umur layan dari 81-ZEG-001B dapat
ditentukan dengan langkah-langkah sebagai
berikut:
determined by following step:
1. Determine the value of the insulation
class for the Power Generator.
1. Menentukan nilai kelas insulasi untuk
Power Generator.
2. Menentukan nilai Arrhenius’ Equation
constants (a dan b).
2. Determine the value of the Arrhenius'
Equation constants (a and b).
3. Determine the ambient temperature
(Va) value.
3. Menentukan nilai ambient temperature
(Va).
4. Determine the value of the winding hotspot temperature rise (VHSn)
4. Menentukan
nilai
winding
hot-spot
temperature rise (VHSn)
5. Menetukan
nilai
5. Determine the RLA value on the Power
Generator.
RLA
pada
Power
Generator.
Table 3. 6 RLA Calculation
a (Arrhenius' equation
constants) (hours)
b (Arrhenius' equation constants)
(Kelvin)
va (ambient
temperature)
(oC)
vHSn
(winding hotspot
temperature
rise) (oC)
0,000000000000000096
20475
35
68,7
Normal
Lifetime
of Power
Generator
(hours)
Loading
Time
(hours)
k (Ageing
Rate)
180000*
11648
1,824179
7309e-05
T
(Kelvin)
341,85
Lc (lifetime
consumption)
L (expected
lifetime at
the rated
hot-spot
temperature)
L (expected
lifetime at the
rated hot-spot
temperature)
Residual Life
Assessment (yr)
0,21
0,00000118
179999,79
20,00*
* Design life GTG
** RL based on rising temperature
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MEDCO OFFSHORE CONTROLLED copies should be stamped.
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
4. Kesimpulan dan Saran
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 26 of 35
4. Conclusion and
Recommendations
4.1 Kesimpulan
Berdasarkan hasil penilaian yang telah
4.1. Conclusion
dilakukan di atas, berikut adalah beberapa
Based on the assessment result that was
kesimpulan:
conducted above, following are several
 Sisa umur dari Power Generator 81ZEG-001B
(011075-04)
adalah
20
tahun.
conclusions:
 Remaining life of Power Generator 81ZEG-001B (011075-04) is 20 years.
 Peralatan Power Generator 81-ZEG-
 Power Generator Equipment Power
001B (011075-04) berada pada tingkat
Generator 81-ZEG-001B (011075-04)
resiko
is at the last level LOW with contain all
LOW
keseluruhan 3.
dengan
akhir
resiko
risk 3.
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Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
4.2 Rekomendasi
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 27 of 35
4.2. Recommendations
Berdasarkan hasil penilaian yang telah
Based on the assessment result that was
dilakukan
conducted above, the following are the
di
atas,
berikut
adalah
rekomendasinya:
recommendations:
 Lakukan perawatan berkala sesuai
 Carry
out
periodic
maintenance
jadwal perawatan untuk menjaga umur
according to the maintenance schedule
pemakaian Power Generator.
to maintain the life of the Power
 Pembebanan
Power
Generator
sebaiknya tidak melebihi 80% dari
Generator.
 The loading of the Power Generator
kapasitas maksimum, hal ini untuk
should
menghindari “over load” pada keadaan
maximum capacity, this is to avoid
beban puncak dan menjaga performa
"overloading"
dari Power Generator.
conditions
 Lakukan
temperature
monitoring
“annually” saat Power Generator dalam
kondisi
beroperasi
temperature
pada
during
and
of
the
peak
load
maintain
the
performance of the Power Generator.
 Perform
temperature
monitoring
"annually" when the Power Generator
generator
dapat
is in operating condition that the
temperature
terhadap
sudah
saatnya
performa
dari
on
the
generator can be monitored properly
yang
 After maintenance and replacement of
diganti,
the system which is due to be replaced,
sistem
untuk
conditions
dan
perawatan
penggantian
pengujian
80%
kondisi
dilakukan
direkomendasikan
exceed
agar
termonitor dengan baik.
 Setelah
not
dilakukan
Power
Generator dan dilakukan kembali RLA.
it
is
recommended
performance
test
of
that
the
the
Power
Generator be carried out and the RLA
is repeated.
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MEDCO OFFSHORE CONTROLLED copies should be stamped.
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
Appendix A – Generator Checklist
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 28 of 35
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 29 of 35
Appendix B – Assessment Worksheet Distribution
Tag Number
81-ZEG-001B
Cof
Pof
US $ 100000<loss<US $ 1 million
Ever happened in another company
LPO = USD 184.166,6666666667
Temperature failure which happened in
another company
Paper Copies are UNCONTROLLED. Please check in EDMS Intranet for latest document revision.
MEDCO OFFSHORE CONTROLLED copies should be stamped.
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 30 of 35
Appendix C – RLA Worksheet
Tag Number
: 81-ZEG-001B
Years of Manufacture
: 2002
Safety device
: Circuit Breaker and Protection Relay
Capacity (kVA)
: 17500
Insulation Class
:F
a (Arrhenius' equation constants) (hr)
: 0,000000000000000096
b (Arrhenius' equation constants) (Kelvin)
: 20475
Va (ambient temperature) (oC)
: 35
VHSn (winding hot-spot temperature) (oC)
: 68,7
Temperature,T (Kelvin)
: 341,85
Normal Lifetime (hr)
: 180000*
Loading Time (hr)
: 11648
k (Ageing Rate)
: 1,8241797309e-05
Lc (lifetime consumption)
: 0,21
L (expected lifetime at the rated hot-spot temp) : 0,00000118
L (expected lifetime at the rated hot-spot temp) : 179999,79
Residual Life (yr)
: 20
*Medco Design Life equipment
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MEDCO OFFSHORE CONTROLLED copies should be stamped.
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 31 of 35
Appendix D – Technical Document Support
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Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 32 of 35
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MEDCO OFFSHORE CONTROLLED copies should be stamped.
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 33 of 35
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MEDCO OFFSHORE CONTROLLED copies should be stamped.
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 34 of 35
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MEDCO OFFSHORE CONTROLLED copies should be stamped.
Design Report/ Study:
Remaining Life Assessment for 81-ZEG-001B at
FP - Belanak FPSO Medco E&P Natuna Ltd.
ID-F-BK-AE1-DRT-FP-81-0001 Rev. 1
Page 35 of 35
Appendix E – Inspection Visual
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