2. 2
Definitions
• A Safety Critical Element (SCE) is any part of the
facilities (installation hardware and equipment
related software):
a) the failure of which could cause or contribute
substantially to a Major Accident Hazard (MAH), or
b) the purpose of which is to prevent or limit the
effects of a major accident.
• Performance Standards describe how a SCE must
perform in terms of its functionality, availability,
reliability and survivability, and also identify any
interdependence between SCEs.
5. • Occupational hazards not considered in line with OMV Standard Safety Critical Elements-
Integrity Management Guideline (EP-HQ-GDL008-00).
5
MAH for
Nawara Project
6. 6
List of SCEs
for Nawara Project
SCE-# Safety Barrier
01 ESD
02 Flammable gas detection
(including portable HC detectors)
03 Blowdown and Relief system
04 Corrosion protection
(including cathodic protection)
05
Lightning protection: Control of
Ignition
(Equipment with ATEX certification
and Electrical grounding)
06 Escape/Evacuation Routes
07 Muster area
08 Flare Monitoring System
09 Fire detection
SCE-# Safety Barrier
10 Passive fire protection
(including Fire & explosion
protection)
11 Active fire protection
(Firewater main and pumps;
Deluge system;
Spray water mist system; Foam
system;
CO2 extinguishing system)
12 Emergency communication
(including CCTV)
13 Uninterruptible Power Supply
(UPS)
14 Hydrocarbon containment:
- Seal plans provided on pumps
- Vibration and control monitoring
system
15 Tank bund
8. 8
SCE Criteria
and numbers
(Sheet 2 of 2)
Total number of SCEs : 2014 i.e. 15.5% of all equipment/elements
• Note: The SCE-06 Escape/Evacuation Routes and SCE-07 Muster area are not included in the list of SCE at TAG
Level, because the routine maintenance and inspection tasks and the technical and legal requirements ensures the
integrity of these SCEs.
Number of
SCEs
11. 11
Performance Standard
Worksheet (Sheet 2 of 2)
Note:
Above example is an extract of the Performance Standard Worksheet for SCE-03. For the complete worksheet for SCE-03 and for the worksheets
for other SCEs, refer the document NAWCPF-MSBI-NCPF-000-HS-REP-92020_Safety Critical Elements and Performance Standard.
12. 12
Verification of
Performance Standards
The verification of the SCEs and Performance Standards have been performed by an Independent verification
Body BUREAU VERITAS SA. Typical extract below from a typical SCE Design Verification Report NAWCPF-
MSBI-NCPF-000-PS-IRP-93021. Verification is an
activity carried out
throughout the life
cycle:
BV for Design Phase;
and
RINA for Procurement,
Construction and
Commissioning Phases
– this is done on a
sample basis.
OMV will appoint
someone to do
verification (i.e. audit
compliance) in the
Operations Phase.
13. 13
Maintenance
Job Plans
Each job plan is identified with an alphanumeric code
constituted as follows:
X UUU YYY for no Safety Critical element
X UUU YYY SCE for Safety Critical element
where as:
X – Discipline:
M Mechanical
E Electrical
I Instrument
N Inspection
S HSE
T Telecommunication
UUU – Code which identifies the item type
YYY – Unique sequential number
14. 14
List of Job Plans
for SCEs
SCE# Job Plan No. Job Plan description SCE# Job Plan No. Job Plan description
SCE-01
IPB001SCE ESD Push Button - SCE
SCE-09
IGDT001SCE Gas Detector (F&G )- SCE
ISDV001SCE Emergency Shutdown Valve - Full Stroke and Leakage Tests IFDT001SCE Flame Detector (F&G) - SCE
ISDV002SCE Emergency Shutdown Valve - Function Test (Partial Closure) IMAC001SCE Alarm Call Point - SCE
IXAT001SCE Analyzer - SCE
SCE-10
MAC001SCE Air Cooler - SCE
IXSW001SCE Switch - SCE MCC001SCE Centrifugal Compressor – External Inspection
IXT001SCE Transmitter SCE MCC002SCE Centrifugal Compressor – CBM / Inspection
ESWB001 Switchboard MCC003SCE Centrifugal Compressor – Minor Intervention
SCE-02 IGDT001SCE Gas Detector (F&G )- SCE MCC004SCE Centrifugal Compressor – Major Intervention
SCE-03
IBDV001SCE Blowdown Valve - Full Stroke Test MHEST001SCE Reboiler – Inspection
IBDV002SCE Blowdown Valve - Function Test (Partial Closure) MHEST002SCE Reboiler – Overhaul
IPVRV001SCE Breathing Valve - SCE NVES001SCE Pressure Vessel Inspection SCE
MFLR001SCE Flare System - 6 months - connection flare header
SCE-11
MEDE001SCE Emergency Diesel Engine – 3 months
MPSV001SCE Relief Valve (up to 4") - SCE MEDE002SCE Emergency Diesel Engine - yearly
MPSV002SCE Relief Valve (above 4") - SCE MEDE003SCE Emergency Diesel Engine - Monthly
SCE-04
MPC001SCE Centrifugal Pump - SCE MPFG001SCE Fire Water Pump - Monthly Inspection
MPU001SCE Pumps – External Inspection and verification MPFG002SCE Fire Water Pump - 6 months Intervention
SCE-05
ATEX001SCE Equipment certified to operate in Ex zone MPFG003SCE Fire Water Pump - Yearly Intervention
IXSW001SCE Switch - SCE MPFG004SCE Fire Water Pump - Diesel Engine Weekly Check
IXT001SCE Transmitter SCE MPFG005SCE Fire Water Pump - Diesel Engine Major Intervention
MPC001SCE Centrifugal Pump - SCE MPSV001SCE Relief Valve (up to 4") - SCE
MPU001SCE Pumps – External Inspection and verification MPU001SCE Pumps – External Inspection and verification
NVES001SCE Pressure Vessel Inspection SCE NVES001SCE Pressure Vessel Inspection SCE
EEH001 Electric Heater - 6 months SDLG001SCE Deluge Skid - Dry Function Test
EEM001 Low Voltage Electric Motor SDLG002SCE Deluge Skid - Wet Function Test
MEM001 Motor Bearing Greasing SDLG003SCE Deluge Skid
MEM002 AC and DC motor bearing replacement SDLG004SCE Deluge Skid
MFAR001 Flame arrestor EEH001 Electric Heater - 6 months
MOSK001 Oil Skimmer ICV001 Instrument and Control Valve Calibration and FT
SCE-06 TBC Evacuation/escape routes ICV002 Control Valve - Major Intervention
SCE-07 TBC Muster Area IPRV001 Pressure Regulator Valve
SCE-08
IPB001SCE ESD Push Button - SCE SCE-12 TBC CCTV, PAGA, digital radio, IP/Satellite telephone etc.
IXT001SCE Transmitter SCE
SCE-13
EBAT003SCE ELECTRICAL BATTERY CHARGER
MFLR002SCE Flare Monitoring System EUPS001SCE UPS - SCE
ESWB001 Switchboard
SCE-14
MPC001SCE Centrifugal Pump - SCE
ICV001 Instrument and Control Valve Calibration and FT MPU001SCE Pumps – External Inspection and verification
ICV002 Control Valve - Major Intervention SCE-15 TBC Tank Bund
Notes:
1) The above information is provided in Attachment-1 of NAWCPF-MSBI-NCPF-000-OM-PRO-92320 Maintenance Plan Report.
and this activity is under development.
