Fire and Gas Detection Philosophy PDF [PDF]

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L830-AF-PHI-0001 S-0830-1241-0001 JKC DOC. No. HOLD COMPANY CONTRACT No. Review Class. 2 COMPANY DOC. No.

JGC JOB No.

HOLD

SHEET

KBR JOB No.

HOLD

1

CHIYODA JOB No.

OF

REV.

A HOLD 22

ICHTHYS ONSHORE LNG FACILITIES

FIRE AND GAS DETECTION PHILOSOPHY

REV.

DATE

ISSUE PURPOSE

PREPARED

CHECKED

APPROVED

A

18-Nov-11

IFR (EPC)

T. Miyashita

Y. Hiroya

Y. Hiroya

FORM EPC-0

2

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 2 of 22

Hold List (1) Deleted (2) Deleted (3) Deleted (4) Deleted (5) Deleted (6) Deleted (7) Deleted (8) Deleted (9) Deleted (10) Deleted (11) Deleted (12) Deleted (13) Detection system for benzene

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 3 of 22

Contents 1.

INTRODUCTION .............................................................................................4

1.1 1.2 1.3 1.3.1 1.3.2 1.3.3 1.3.4

Scope ..............................................................................................................4 Definitions........................................................................................................4 Applicable Specification and Standards ...........................................................5 Contractors Documents ...................................................................................5 COMPANY Documents....................................................................................5 Australian & International Codes and Standards..............................................6 Abbreviations...................................................................................................6

2.

GENERAL DESIGN PRINCIPLES ..................................................................7

2.1 2.2

Objectives........................................................................................................7 Methodology of FGS design.............................................................................8

3.

FIRE AND GAS SYSTEM..............................................................................10

3.1 3.2 3.3 3.4 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.6 3.4.7

System Overview...........................................................................................10 FGS operator console and Fire Alarm Panel (FAP) for Building.....................11 Initiation and Automation................................................................................12 The hazards in plant area ..............................................................................14 Process Area .................................................................................................14 LNG Jetty area...............................................................................................14 LPG/Condensate Jetty area...........................................................................15 LNG/LPG Tankage Area................................................................................15 Condensate Storage Area..............................................................................15 Building..........................................................................................................16 Other Hazards ...............................................................................................16

4.

DETECTION ..................................................................................................17

4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

General..........................................................................................................17 Flame detector...............................................................................................17 Flammable gas detector ................................................................................17 Smoke detector..............................................................................................18 Heat detector .................................................................................................19 Hydrogen sulfide detector ..............................................................................19 CO2 gas detector...........................................................................................19 Manual call point............................................................................................19 Low temperature spill detector .......................................................................20

5.

ALARM AND ACTION ..................................................................................20

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

1.

INTRODUCTION

1.1

Scope

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 4 of 22

This philosophy specifies the general principles and requirements for designing a suitable fire and gas detection system (hereinafter called FGS) for the plant, jetty areas and operation complex. It is also intended to provide key information for the designer/engineer in developing relevant design details during the EPC stage. This document describes the basic philosophy of fire and gas detection system for all onshore facilities i.e. Process area, Utility area, Offsite tanks, Jetty area, and operation complex etc. of Ichthys Onshore LNG Facilities Project to be constructed at Blaydin Point, to the southeast of Darwin, in the Northern Territory (NT). This document is one of the HSE design related documents in Ichthys Onshore LNG Facilities Project. HSE design related documents are listed in Table.1. Table 1. HSE Design Related Documents Category

1.2

Document Information Company Doc. No.

Title

Overall HSE Design

L290-AH-PHI-0001

HSE Philosophy

Plant Facilities Layout

L290-AH-PHI-0004

Plant Layout Philosophy

L290-AH-MTX-0001

Module and Train Separation Matrix

L290-AX-BOD-0001

Basis of Design for Piping Engineering

L290-AS-BOD-0001

Structural Design Criteria for Module

Hazardous Area Classification

L780-AE-PHI-0001

Electrical Design Philosophy

Fire Hazard Management

L790-AF-PHI-0001

Active Fire Protection Philosophy

L830-AF-PHI-0001

Fire and Gas Detection Philosophy

L790-AL-PHI-0001

Fireproofing Philosophy

L290-AH-PHI-0005

Plant Zoning Philosophy

Explosion Hazard Management

L290-AH-PHI-0001

HSE Philosophy

Isolation

DEV-OPS-PH-0005

Ichthys Onshore Mechanical Isolation Philosophy

Overpressure & Relief Protection

L290-AP-PHI-0003

Overpressure Protection, Flare and Vent Philosophy

Emergency Shutdown and Depressuring System

L290-AP-PHI-0002

Emergency Shutdown and Depressuring System Philosophy

L290-AP-PHI-0005

Plant Zoning Philosophy

Emergency Power

L290-AE-PHI-0005

Electrical Design Philosophy

HVAC

L300-AA-GLN-0002

General Design Brief for Building HVAC

Control of Spills

L290-AH-PHI-0002

LNG/LPG Spill Control Philosophy

Drainage

L750-AP-PHI-0001

Drainage and Treatment Philosophy

Paving

L320-AC-BOD-0001

Design Criteria for Civil

Escape, Evacuation and Rescue

L290-AH-PHI-0004

Design Philosophy for Means of Escape

Human Factor

L290-AH-PHI-0003

Human Factor Engineering Philosophy

Noise

L290-AH-SPC-0002

Specification for Noise Control

Definitions z

COMPANY

:

INPEX Operations Australia Pty Ltd

z

CONTRACTOR

:

The Joint Venture between JGC, KBR and CHIYODA

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

1.3

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 5 of 22

z

Contractor Items

:

Everything to be incorporated into the Plant

z

Site

:

Location where the Plant is to be constructed and the vicinity thereof.

z

SUBCONTRACTOR

:

Any COMPANY to whom CONTRACTOR has subcontracted any part of the works.

z

VENDOR

:

Supplier of CONTRACTOR’s items

Applicable Specification and Standards The project shall be designed in accordance with the requirements of codes and standards defined in this section. The following shall be used, in order of decreasing precedence: 1.

Applicable Commonwealth and Northern Territory regulatory/statutory requirements;

2.

International laws and regulations where they do not conflict with item 1;

3.

Client corporate standards and project standards where they do not conflict with items 1 or 2; and,

4. Recognized local and international codes, standards and guidelines where they do not conflict with 1, 2 or 3. The following reference shall be applied to the extent specified in this philosophy.

1.3.1

Contractors Documents L290-AH-PHI-0001

HSE Philosophy

L290-AH-PHI-0005

Plant Zoning Philosophy

L790-AF-PHI-0001

Active Fire Protection Philosophy

L790-AL-PHI-0001

Fireproofing Philosophy

L830-AF-SPC-0001

Project Specification for Fire and Gas System

L290-AJ-SPC-0005

Specification for Fire and Gas System

L840-AK-SPC-0002

Specification Public Address and General Alarm System

L840-AK-SPC-0004

Specification Closed Circuit TV System

L830-AF-PRC-0001

Fire and Gas Mapping Study Procedure

L830-DF-BFD-0001.001 Overall Fire and Gas System Block Flow

1.3.2

L790-AF-LIS-0001

Consolidated Hazardous Equipment List

L830-DF-LAD-00XX

F&G System Layouts

L290-AH-REP-0005

Fire and Explosion Risk Assessment

L790-AF-PHI-0002

Fire and Gas Detection Philosophy (FEED)

COMPANY Documents C060AP0001

Operations and Maintenance Philosophy for design

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

1.3.3

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 6 of 22

Australian & International Codes and Standards The following applicable Codes and Standards are either highlighted from or in addition to those listed in L290-AG-LIS-0005: REGULATIONS, CODES AND STANDARDS. (1)

Australian Standard

BCA

Building Code of Australia

AS 1603.1

Automatic Fire Detection and Alarm systems – Heat Detectors

AS 1603.2

Automatic Fire Detection and Alarm systems – Point Type Smoke Detectors

AS 1603.3

Automatic Fire Detection and Alarm systems – Heat Alarms

AS 1603.5

Automatic Fire Detection and Alarm systems – Manual Call Points

AS 1603.7

Automatic Fire Detection and Alarm systems – Optical Beam Smoke Detectors

AS 1603.11

Automatic Fire Detection and Alarm systems Part 11: Visual warning devices

AS 1603.15

Automatic Fire Detection and Alarm systems Part 15: Remote indicators

AS/NZS 60079.29 Explosive Atmospheres (2)

National Fire Protection Association Codes

NFPA 59A

Standard for the Production, Storage and Handling of Liquefied Natural Gas (LNG)

NFPA 72

National Fire Alarm Code

(3)

American Petroleum Institute (API)

API STD 2510

1.3.4

Design and Construction of LPG Installations, 8th ed. – 2001

Abbreviations The following abbreviations are used in this document: CCB

Central Control Building

CCTV

Closed Circuit Television

EDP

Emergency Depressurization

ESD

Emergency Shutdown

FGS

Fire and Gas System

FAP

Fire Alarm Panel

FRA

Fire Risk Assessment

FRT

Floating Roof Tank

HSSD

Highly Sensitive Smoke Detection

ICSS

Integrated Control and Safety System

IPS

Interruptible Power Supply

IR

Infrared

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 7 of 22

LCD

Liquid Crystal Display

LED

Light Emitting Diode

LEL

Lower Explosive Limit

LER

Local Electrical Room

LFL

Lower Flammability Limit

LIR

Local Instrument Room

LNG

Liquefied Natural Gas

LPG

Liquefied Petroleum Gas

HVAC

Heating, Venting and Air Conditioning System

MAC

Manual Alarm Call Point

MOF

Module Offloading Facility

MOS

Maintenance Override Switch

MR

Mixed Refrigerant

PDP

Plasma Display Panels

PLC

Programmable Logic Controller

PSD

Process Shutdown

PSV

Pressure Safely Valve

PTZ

Pan, Tilt, and Zoom

SIS

Safety Instrumented System

SIL

System Integrity Level

QRA

Quantitative Risk Analysis

UPS

Uninterruptible Power Supply

VESDA

Very Early Smoke Detection Apparatus

2.

GENERAL DESIGN PRINCIPLES

2.1

Objectives The overall fire protection system shall meet the following specific objectives: -

Control an incident if it does occur and limit its escalation

-

Limit damage to facilities and equipment, and prevent loss of life

To achieve the objectives above of fire protection system, FGS shall be designed to carry out the following functions: 9

Detect accumulation of flammable, combustible, toxic gas and fire

9

Alert personnel of occurrence of hazardous incident

9

Provide information for command and control on the cause of the incident

9

Initiate executive action for control and suppression of the hazardous incident

FGS design shall be achieved through facility design optimization, practical/realistic management of possible hazards (with the knowledge of their causes and consequences) and the application of quantitative risk assessment (QRA) to quantify risks and demonstrate that the overall risk to personnel from the facility is within accepted risk criteria.

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

2.2

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 8 of 22

Methodology of FGS design To achieve the suitable FGS design, FGS shall be designed according to methodology in Fig 1. Each step of developing the design in Fig. 1 is consistent with the chapter of this philosophy and has deliverables which show the information required in each chapter. These objectives shall be consistent with the following approach for system optimization, arranged in descending order: •

Fire and Gas detection system shall be designed by code/standard and experience.

•

Any recommendation arising out of a related CA, such as Fire and Explosion Analysis (FERA) and Quantitative Risk Assessment (QRA), shall be forwarded to the Client for approval prior to implementation.

•

Fire and gas detection mapping study shall be carried out to verify the number and location of the detector in EPC stage. Refer to L830-AF-PRC-0001, Fire and Gas Mapping Study Procedure.

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 9 of 22

FIG.1 METHODOLOGY FOR DESIGNING FGS

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

3.

FIRE AND GAS SYSTEM

3.1

System Overview

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 10 of 22

Fire and Gas System (FGS) as well as Safety Instrumented System (SIS) shall be an integral part of the Integrated Control and Safety System (ICSS). Although they form part of the integrated system and will use similar hardware, the input and output and functionality will be totally segregated. The system configuration and location of each human interface of FGS are shown in L-830-D-BFD-0001.001, Overall FGS Block Flow Diagram. (1)

The FGS shall then have interfaces with SIS for automatic operation (Jetty head, Refrigerated storage, Fired heaters (Acid Gas Incinerator and Heating Medium Furnace) and LIR/LER electrical isolation) of ESD functions for certain confirmed fire and/or signals from FGS. These ESD functions would isolate sections of equipment upon detection of a fire, gas leak or LNG/LPG leak to limit the uncontrolled quantity of hydrocarbons that could be released. The degree of automation is shown in L290-AP-PHI-0002, Emergency Shutdown and Depressurizing Systems Philosophy. Refer to section 3.3 of this philosophy for further requirement.

(2)

LER/LIR shall be electrically isolated on confirmed gas detection inside the rooms, and transformers shall be tripped on confirmed gas detection around the transformers. Refer to section 3.3 of this philosophy for further requirement.

(3)

General power outlets and welding outlet in the field shall be isolated on confirmed gas detection at field. The isolation should be conducted per gas alarm zone, i.e. module.

(4)

The FGS system cabinet shall be provided on strategic locations throughout the plant such as Local Instrument Rooms (LIR) of serving monitored areas and Central Control Building (CCB). They will receive signals from field detection devices located in the related monitoring areas, and to/from protection devices for remote/automatic actuation of local protection systems, and transfer the received signals to FGS operator consoles located in the CCB. A local FGS system cabinet in the jetty LIR shall monitor associated fire and gas alarms in the LNG and LPG/condensate jetty areas.

(5)

The main FGS system cabinet shall be located in the Central Instrument Room (CIR) of the Central Control Building. This main FGS system cabinet shall connect to FGS operator consoles and from each fire alarm panel (FAP) provided inside buildings where fire detection and alarm systems are required around CCB. It shall also receive common fire/common fault/fire protection system actuation signals, if any. The main FGS system cabinet shall be also connected with each FAP and any device in operation complex.

(6)

The main FGS operator consoles shall be provided for the remote operation of all outdoor automatic or remote operated fire protection systems and fire water pump system on the plant. Outdoor fire protection systems include fixed water spray/water curtain systems, fixed deluge systems, and fixed low/high expansion foam systems, etc. The main FGS operator consoles are installed in the CCR ICSS auxiliary consoles for manual release of fire extinguishment. The backup human machine interface will be provided, as part of utility group console. Interface between the main FGS operator consoles and FGS system cabinet shall be via PCS communications, and the FGS screens in the consoles shall be the integral part of PCS graphics. One FGS screen in each FGS console, however, shall display the information received directly from the FGS for redundancy.

(7)

FAP for buildings shall be of addressable type and shall monitor fire and/or fire system actuation signals in that particular building through the provided indoor detectors which are connected to the FAP. Alarms such as common fire alarm, common system operation signal, common fault alarm, common HSSD fire alarm and common HSSD fault alarm will be sent from each building FAP to the local FGS control panel or directly

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 11 of 22

to the main FGS control panel using hard-wired connections. (8)

FGS large displays shall be provided in the CCR which shall indicate common or group fire/spill/gas alarms for the plant. The large display shall be integrated in ICSS large screens with 2x4 matrix rear LCD assigned to each operation group and show plot-plan based graphic display showing the alarm locations for easy identification of the incident location in relation to the entire plant layout. In addition, mimic panel shall be provided in Gate House also to show the overall status of the FGS.

(9)

CCTV camera system shall be integrated into the large display and FGS so that on confirmed fire Outdoor IP based on Explosion proof PTZ cameras of Process CCTV system will pan, tilt and zoom to selected and be displayed on the large display.

(10) Outdoor IP based on Explosion proof PTZ camera of Process CCTV system shall be provided for the following areas: - LNG Train 1 /Train 2 area - Utility area - BOG & Gas Receiving - Jetty - Beach Head (if required) - MOF (if required) For the detail, please refer to L840-AK-SPC-0004, Specification Closed Circuit TV System. (11) All FGS system cabinets (i.e. main FGS system cabinets, local FGS system cabinets) shall be connected via optic fiber cables in a redundant configuration with separate routes to ensure the overall reliability and integrity of the system. 3.2

FGS operator console and Fire Alarm Panel (FAP) for Building (1)

The FGS operator console /FAPs should provide the following: -

Monitoring of all components of the detection circuit up to and including the last sensing element

-

Fault signal generation in the event of any malfunctions in the system

-

Supervisory systems to enable the failure to be quickly identified and located

-

Control/shutdown operation of associated self-contained systems such as those used for heating, ventilation and air conditioning (HVAC) fans and fire dampers

-

Providing controls for the fire protection system and fire pumps

(2)

The FGS shall provide the interface to a range of field devices monitoring the plant condition and, in the event of detected or confirmed hazard, take appropriate action to initiate equipment shutdown and/or depressurization, release extinguishing agents and/or initiate plant and local alarms and general alarms as required.

(3)

The FGS power related to field FGS functions shall be supplied by redundant UPS with 2 hours back-up time. For FGS power related to building FGS functions shall be supplied according to the relevant Australian regulation. For detailed design, see Para. 3.16 of AS 1670.1, “Fire detection, warning, control and intercom systems – system design, installation and commissioning” shall be applied.

(4)

To ensure reliability, the FGS must utilize readily available, proven, mature, robust and

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 12 of 22

standard design technology that has a record of application in similar facilities worldwide. For this purpose, any integrated centralized microprocessor programmable logic controller (PLC) system, communication modules, network devices, IO cards related to FGS system cabinets, if applied, shall be fully redundant to ensure reliability. The vendor shall state the effect of common mode failures on alarm scanning and display. Redundancy techniques should be employed to minimize the effects of common mode failures within equipment and its power supply system. Building FAPs and CO2 extinguishing system for turbine enclosures, if any, shall be approved by an internationally recognized testing laboratory and approval body, such as UL, FM or equivalent acceptable to Australian authority. The reliability of control system shall be verified through the study by VENDOR. (5)

Full duplication of other aspects of the FGS, such as detector, will not be required because such individual failures will raise fault alarms and will not cause total failure of the system.

(6)

The FGS operator console should be designed with spare capacity to allow for future requirements and also a contingency allowance for design development changes.

(7)

Fire and gas detection circuits may be required to remain active even after “safe” areas have become hazardous. Equipment suitable for use in hazardous areas will thus be required. Field devices installed in electrical hazardous area shall be suitable for the use in hazardous area classification and designed according to the Ex schemes, in accordance with AS 2681.1, as follows: (1) Australian Standards (ANZ Ex) (2) IEC Standard (IEC Ex) The selection of field FGS device shall comply with the following type of protection. (1) Flame Proof Enclosure (Ex”d”) for Zone 2 and Zone 1 area (2) Intrinsically Safe (Ex”ia”) for Zone 0 area Fire resistant cables shall be considered for fire and gas detectors where they lie in fire scenario envelope.

(8)

3.3

MOS shall be provided to allow maintenance actions to be performed as a function of detector calibration and loop proving, or at Operations discretion when activities that would otherwise trigger false detection are planned Alarm shall be sent when override switch is on.

Initiation and Automation (1)

The time it takes to respond is greatly dependent upon the type of detection system. It is critical for the FGS to detect the onset of potential hazards (such as fire, gas leak, etc.) to minimize the consequential damages to personnel, assets and the environment. Automatic initiation of executive action should be carefully considered to ensure that any initiation does not result in an acceleration of the initial event (e.g. water application directly on cryogenic hydrocarbon spills which can increase flammable vapor formation or automatic extinguishing systems such as CO2 total flooding in manned areas). Emergency Shutdown and Depressurizing Philosophy, L-290-AP-PHI-0002, shall be referred to determine if ESD/EDP should be automatic in operation. Following ESD actions shall be considered. Detailed configuration should be shown in Fire and Gas System Cause and Effect (Document Number: TBA). -

Jetty head ESD on confirmed gas detection, confirmed fire detection or spill detection

-

Refrigerated Storage ESD on confirmed gas detection, confirmed fire detection or spill detection

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 13 of 22

-

Fired Heater Package Trip on confirmed gas detection at air intake

-

Package Gas Turbine Trip on confirmed gas detection in the gas turbine

-

ESD for safety electrical isolation on confirmed gas detection around transformers or inside LIR/LER

For the fire protection system operation, refer to Active Fire Protection Philosophy, L790-AF-PHI-0001. (2)

Any automated control actions (initiation of equipment depressurization/shutdown, extinguishing systems and/or alarm actuation), should in general, result from a voting type of circuit with the normal requirement being 2 out of “N” (or hereinafter called 2ooN) circuits in alarm. The minimum number of circuits to achieve 2ooN voting requirement will depend on the acceptable level of fault tolerance and the number of detectors needed to adequately cover the monitored area. Normally, N is equal to or more than 3. The minimum number of detectors shall allow for a single detector failure and/or removal of a detector for maintenance purposes, whilst ensuring that the loss of one detector does not compromise the system’s response to the hazard and still maintains a high degree of immunity to the initiation of false control actions.

(3)

LIR/LER located in the area where the high concentrate flammable gas cloud will reach shall be electrically isolated on confirmed gas detection around transformers or inside LIR/LER.

(4)

For automatic fixed water spray systems and fixed water curtain systems, heat sensitive cables and/or flame detectors shall be employed to activate the system. If one of the detectors is actuated, a fire alarm will be raised at the related local fire alarm panel. If 2oo N (N≧2) detectors are actuated, the FGS shall actuate the fixed water spray/water curtain system automatically, as required.

(5)

For buildings provided with air-intake for HVAC system in the nominated plant areas, HVAC systems of those building shall automatically close damper and change to recirculation mode upon 2oo3 confirmed gas detection alarm signals from air intake flammable gas detectors. And also shall automatically shutdown upon confirmed fire signal from FGS Cabinet.

(6)

The plant closed circuit television (CCTV) system shall be provided for monitoring potential fires and/or other hazards including LNG and LPG/condensate jetty areas. The CCTV shall be used for the operation of remote controlled monitors on jetty heads during emergency situations.

(7)

Remote firewater monitor control panels shall be provided in the jetty LIR to allow remote control operation of the jetty monitors from a safe location during emergency cases. Separate remote monitor control panels shall be provided outdoor at safe locations on the trestle at least 60m from the jetty head. Control is via the Fire and Gas system.

(8)

Solenoid valves shall be provided for automatic/remote operation of fire protection systems such as fixed water spray system, fixed water curtain system, fixed high expansion foam system, etc. Control of these valves is via the fire and gas system. All solenoid valves associated with deluge valves shall be designed using the energized-to-open concept. Line monitoring shall be required for these solenoid valves.

(9)

Suitable pressure sensing device shall be provided for actuation signals from automatic fire protection systems e.g. downstream of deluge valves. Preferable type of pressure sensing device is pressure transmitter. Signals from these devices are routed via the fire and gas system. These pressure sensing devices shall be designed with normal open concept, close to alarm. No pressure sensing device shall be required for manual operation systems,

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 14 of 22

because they will be started by operators and the system operation can be confirmed by CCTV. (10) For impounding pond, 1oo2 low low detection of low temperature spill detector shall shutdown the associated impounding pond pump. High expansion foam shall be automatically activated by 2oo2 voting from alarm signal of the spill or flame detectors. (11) General power outlets and welding outlet located in the area where the high concentrate flammable gas cloud could reach shall be isolated on confirmed gas detection at field. The isolation should be conducted per gas alarm zone, i.e. module.

3.4

The hazards in plant area

3.4.1

Process Area (1)

Liquid and/or gas leaks from process train areas may occur and can be cold or warm, low-pressure or high-pressure. Gas leaks may be denser or lighter than air. Point type gas detectors shall be considered for the following locations: -

LNG/LPG pump seal

-

Combustible gas compressor seal

-

Near direct fired heater for incoming gas detection from other areas

-

Air-intake for plant building

-

Air-intake for air-compressor, gas turbine, or other plant rotating equipment

-

Where leaked lighter than air gas could accumulate such as in ceilings or underneath solid floors of multi-story structures

-

Where leaked heavier than air gas possibly may accumulate, such as in pits

For area gas leak monitoring, beam type flammable gas detectors shall be considered where heavier than air gas and/or cryogenic combustible vapors are likely to be leaked. Such detectors shall be provided for ground level at the periphery of gas leak area to detect its possible migration to non-hazardous areas.

3.4.2

(2)

LNG spills will be detected using low temperature spill detectors located in the impounding basin. Gas detectors will also be provided in or around the impounding basin to detect any liquid that will be vaporizing.

(3)

Jet fires and pool fires may also occur around process train areas, either due to ignition of a delayed vapor release or ignition of LNG spill into the impounding basin. Such fires will be detected using flame detectors and/or heat sensitive cables.

LNG Jetty area (1)

Both liquid and vapor leaks can occur at the jetty head. These leaks may vary in sizes depending on the type of potential failures. In the event of any vapor or liquid leak at the jetty heads, the loading operation (if on-going) will be manually or automatically discontinued/stopped, and the entire jetty head and trestle will be isolated from the LNG tanker as well as from the related shore connections to minimize the quantity of material that is lost. Such leaks will be identified through a combination of detection systems (using spill detectors for and flammable gas detectors).

(2)

Gas leaks from the jetty area are mostly cold and denser than air. The gas may consequently accumulate at grade or travel in a downwind direction. Flammable gas detectors shall be located on the jetty head to detect such LNG gas leaks.

(3)

LNG spills will be detected using low temperature spill detectors located in LNG jetty

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 15 of 22

impounding basin. Gas detectors will also be provided around loading arms and in the impounding basin to detect any liquid accumulating and its subsequent vaporization.

3.4.3

(4)

Flash fires and pool fires may also occur around the jetty head area, either due to a delayed ignition vapor release or ignition of the LNG spill into the impounding basin. Such fires will be detected using flame detectors.

(5)

Visual alarming device should be installed to prevent vehicle approach during the occurrence of gas leakage. These devices should be located at the entrance of jetty trestle so that drivers can recognize the alarm.

LPG/Condensate Jetty area (1)

The condensate jetty handles LPG as well as condensate. Liquid leaks can occur at the jetty head. These leaks may vary in sizes depending on the type of potential failures. In the event of any liquid leak at the condensate jetty head, the loading operation (if on-going) will be manually or automatically discontinued/stopped, and the entire jetty head and trestle will be isolated from the LPG/condensate tanker as well as from their related shore connection to minimize the quantity of material that is lost. Such leaks will be identified by gas detectors and/or manually by personnel and continuous onboard observation.

3.4.4

3.4.5

(2)

Flash fires and pool fires may also occur around the jetty head area, either due to a delayed ignition vapor release or ignition of the LPG/Condensate spill into the impounding basin. Such fires will be detected using flame detectors.

(3)

Any ignition of condensate spill shall be detected using flame detectors located at strategic points in the condensate jetty area.

(4)

Visual alarming device should be installed to prevent vehicle approach during the occurrence of gas leakage. These devices should be located at the entrance of jetty trestle so that drivers can recognize the alarm.

LNG/LPG Tankage Area (1)

Liquid leaks may occur in LNG/LPG tankage areas which may vary in size depending on the potential type of failure. In the event of any cryogenic liquid leak in these areas, the transfer operation (if on-going) will be discontinued/stopped and the entire liquid send-out system will be isolated to minimize the quantity of material that is lost.

(2)

Gas leaks from the LNG/LPG storage tanks will be cold and denser than air. The gas may consequently accumulate at or near grade level or travel in a downwind direction. Flammable gas detectors shall be provided located on top of the tanks, and shall be provided to detect such gas leaks.

(3)

LNG spills will be detected using low temperature spill detectors located in places such as the catchment pans on top of the LNG storage tanks, and in the impounding basin itself. Gas detectors will also be provided around valves on the pump discharge line on the tank and the impounding basin to detect any liquid that will be vaporizing. Impounding and/or dike shall be considered for LPG tanks in accordance with API STD 2510.

(4)

Flash fires and pool fires may also occur around the LNG/LPG storage tank areas, either due to a delayed ignition vapor release or ignition of the LNG/LPG spill into the impounding basin. Such fires will be detected using flame detectors and/or heat sensitive cables.

(5)

Any ignition of LNG release on the vent stacks/relief valves of LNG storage tanks shall be detected using flame detectors.

Condensate Storage Area (1)

Small liquid spill from flange connections or small bore piping is a credible scenario for

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 16 of 22

condensate storage area. The spilled condensate will accumulate on the sloped side of the dike. Such hydrocarbon spills shall be found by routine patrol of operators. If the spill is ignited, such fires shall be detected using flame detectors. (2)

3.4.6

Rim seal fires may also occur on condensate floating roof tanks (FRTs). Such fires shall be detected using heat sensitive cables installed on the tanks seal ring. Rim seal fires shall be the single fire case to be considered for floating roof condensate tanks especially if the floating roof is of double deck pontoon design. Full surface fire is not a credible scenario for FRTs because of the slim possibility of the floating roof sinking.

Building (1)

The building fire detection system shall be provided in accordance with the Building Code of Australia (BCA) and other relevant Australian regulations.

(2)

For CCB and LIRs, in which valuable electrical equipment and/or instruments are located, fixed gas extinguishing systems, such as CO2 system, INERGEN system or FM200 system are normally considered. However, actuation of total flooding systems may be dangerous, and in some extent, fatal to the operators who happen to be inside. Thus, for Ichthys Onshore LNG Facilities Project, a high sensitive smoke detection (HSSD) system, such as VESDA, shall be considered instead of providing a fixed gas extinguishing system. Very early stages of a fire can be detected using the system, and such early stages of a fire could be extinguished by cutting the power supply to the unit and fighting the fire manually. For manual fire fighting, the cable monitored by HSSD shall be accessible easily and the location of sampling point shall be considered to specify the location of fire. This should be possible using fail-safe remotely operated controls and by using portable/wheeled fire extinguishers.

(3)

In addition to HSSD or where HSSD is not provided, buildings will be provided using addressable type smoke and/or heat detectors.

(4)

Indoor manual alarm call points shall be provided for all buildings. These will be located near building entrances and at strategic locations throughout the building to warn existing occupants and personnel outside the building vicinity of the on-going incidents inside that building.

(5)

Flammable gas detectors shall be provided at HVAC air intake of the pressurized buildings in the plant area. 2oo3 confirmed flammable gas detection shall change to recirculation mode. If acid gas ingress at HVAC air intake is expected, H2S gas detectors shall be provided at HVAC air intake, however, additional H2S detectors need not be provided there where point type flammable gas detectors are located.

(6)

Confirmed fire alarm in the building from FGS cabinet shall shutdown HVAC system.

(7)

Flammable gas detectors shall be provided around transformers located in the area where the high concentrate flammable gas cloud could reach. 2oo3 confirmed flammable gas detection shall trip transformers.

(8)

Flammable gas detectors shall be provided in rooms of LIR/LER located in the area where the high concentrate flammable gas cloud could reach. 2oo3 confirmed flammable gas detection shall isolate LIR/LER electrically. Flammable gas detection in air lock room shall not cause electrical isolation. For LIR electrical isolation, time delay shall be considered for sequential process shutdown. In principle, the electrical isolation for LIR/LER should be achieved by cutting the power supply at the upstream power distribution board.

3.4.7

z Gas Detection inside LIR

⇒ Electrical Isolation at LER Switchboard

z Gas Detection inside LER

⇒ Electrical Isolation at SS Switchboard

Other Hazards (1)

Enclosures with forced air ventilation (such as gas turbines), if any, will be provided with

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 17 of 22

gas detection and fire detection to shutdown the system, and actuate the related fire protection system, as required. (2)

Electrical fires may occur at electrical apparatus and control buildings. As mentioned in Section 3.4.6 of this document, CCB and LIRs will be provided with HSSD system, and using portable CO2 extinguishers, such incipient fires will be extinguished. For other electrical fires, such as fires occurring on motors, fans, etc., CO2 or dry chemical portable extinguishers shall be provided. Once electrical equipment is de-energized, a fire of such equipment is not considered as C-fire (electrical fire), however, will be classified as A-fire thereafter. So, the system should be first de-energized, and then application of fire water can commence if water is the preferable medium for fighting the fire.

4.

DETECTION

4.1

General All field detectors shall be suitable for the environment in which they are to be installed, and shall be protected from the effects of corrosion, dust, and vibration. They should also be suitable for the particular hazards of LNG, LPG and other hydrocarbons handled in the plant.

4.2

Flame detector Infrared (IR) flame detectors should respond to radiation equivalent to the CO2 absorption band. They should be solar blind and their response to other sources of radiation should be minimized. Built-in test facilities should be provided for checking the detector on line. IR flame detector shall be multi-spectrum IR flame detector, which can detect several peaks of spectrum. In certain instances, areas covered by optical flame detectors may be supplemented with fusible plastic tube heat detectors or heat sensitive cables. For the plant area, IR flame detectors shall be provided for each group of process equipment or process area. At least two IR flame detectors shall be provided for each monitoring area. In general, flame detectors shall be provided to detect fires in general open areas of the plant containing flammable liquids and gases.

4.3

Flammable gas detector Flammable gas detectors should be of IR point type or beam IR type. The catalytic oxidation type detectors will not be used in this project. Infrared detectors should be of the self-calibration and test type. The device should be capable of calibration, within the range 0 ~ 100 % of the lower explosive limit (LEL). For the plant, IR type detectors are highly recommended, because they have good detection sensitivity and low operational expense. Catalytic oxidation types are normally used for LNG plants but it is not preferable because it has a higher operational expense than an IR type, slow response time, and undetected mode of failure. Although beam type IR gas detectors have a higher cost than point type detectors, they have the advantage of a wider coverage area relative to point type and their performance outweighs point-type technology under all environmental conditions. Thus, beam-type IR detectors will be used on the plant for area periphery. Flammable gas detector should have an indication of measured gas concentrations in % lower explosive limit (LEL) and shall have high alarm and high high alarm settings as follows: For point-type IR detector

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 18 of 22

(1)

Low:

10% LEL

(2)

High:

50% LEL

For beam-type IR detector (3)

Low:

1 LEL m

(4)

High:

3 LEL m

The location of gas detectors should take into account the following items: -

type of gas being detected (heavier or lighter than air)

-

natural and mechanical ventilation

-

possibility of gas accumulating to a level that could become hazardous

-

the most likely source of leakage

-

personnel access for maintenance and calibration.

Gas detectors may also be required to monitor and/or initiate shutdown of safe areas, air inlets to unclassified areas or manned areas and engines. 4.4

Smoke detector Smoke detectors operate on various principles, including photoelectric obscuration, ionization of smoke particles, resistance changes in a chamber and optical scanning of a cloud chamber. Addressable type smoke detectors shall be used and type of smoke detector shall be as per manufacturer’s standard which shall be certified by internationally recognized organization or country of origin testing authority. Smoke detectors shall be connected to the FAP inside the building being protected. The alarm signal from building FAP shall be transferred to the main FGS control panel in CCB and Fire Station through the related local FGS panels, if any. The use of smoke detectors should be restricted to confined/enclosed or semi-enclosed areas where products of combustion can be reliably detected. Location of smoke detectors should take into account the following items: -

local air currents

-

air inlet

-

extraction/sampling points.

Smoke detector is suitable for most building. In general, smoke detector give faster response than heat detector for the small fire, e.g. burning of cable or control panel, and the fire with a large amount of smoke particle, e.g. the fire of wood, and paper. There are some several types of smoke detector, point type smoke detector, beam type smoke detector, and high sensitive smoke detection system. Point type detector shall be applied for enclosed or semi-enclosed area with the potential to accumulate smoke. Point type smoke detection should not be mounted directly in ventilation ducts or HVAC intake due to the high air velocities encountered. Smoke detection in these areas can be achieved either, by means of duct probes which direct a sample of air across the point type smoke detector, or by the use of beam type smoke detectors. Beam type smoke detector shall be applied for open space. Beam type smoke detectors are usually specified to cover open roof spaces and can be used for long corridors. In critical areas, such as LIR and LER, where early warning of a fire incident is required, highly sensitive smoke detection (HSSD) system such as VESDA should be used in addition to conventional smoke detectors. This is a fast response sample pipe network system with a special form of optical smoke detection based on smoke particle light scattering.

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

4.5

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 19 of 22

Heat detector Heat detector is suitable for use in most building. However, where the ceiling height is high, e.g. 9m or where large losses could be caused by small fire, heat detector is generally not suitable. In areas where smoke detector is not suitable due to ambient conditions, such as kitchen or dusty areas, point type heat detectors are better suited since they are designed to rapidly activate on rate of change in temperature that will occur in a room due to fire condition. Heat detectors fall into two general kinds, fixed-temperature devices and rate-of-rise devices. Fixed temperature devices respond when the detection element reaches a predetermined temperature. Rate-of-rise devices respond to an increase in heat at a rate greater than a predetermined value. Some devices combine both principles. The same principles apply regardless of whether the devices are of the single spot type or are continuous along a line or circuit. Rate of rise detector will normally respond to the presence of fire conditions faster than a fixed-temperature type because of its ability to sense rapid increase in temperature. Accordingly, the use of rate-of-rise detectors is preferred for general building’s environmental condition. The type of heat detector shall be determined in accordance with AS 1603.1 heat detector. Addressable type heat detectors shall be used and specification of heat detector shall be as per manufacturer’s standard which shall be certified by internationally recognized organization or Australian standard.

4.6

Hydrogen sulfide detector Monitoring and detection of high concentrations of hydrogen sulfide (H2S) shall be provided in order to protect personnel from effects of exposure to these toxic gases. H2S gas detectors shall be installed in acid gas treatment units in process train areas and slug catcher areas where equipment handling 500ppm or more of H2S is located. Where point type flammable gas detector(s) are located, additional H2S detectors need not be provided there. The H2S gas detector shall alarm at two (2) levels of the H2S concentration in the atmosphere as follows:

4.7

(1) Low alarm:

10 ppm for 8-hour exposure

(2) High alarm:

15 ppm for 15-minute exposure

CO2 gas detector Monitoring and detection of accumulation of carbon dioxide (CO2) shall be provided in order to protect personnel from effects of exposure to CO2. CO2 gas detectors shall be installed at the confined area where highly-concentrated CO2 is potential to be accumulated near the potential leak source, CO2 compressor etc., if provided. CO2 gas detector shall alarm at two (2) levels of the CO2 concentration in the atmosphere as follows:

4.8

(1) Low alarm:

5000 ppm for 8-hour exposure

(2) High alarm:

30000 ppm for 15-minute exposure

Manual call point Manual alarm call points (MACs) shall be installed at strategic locations throughout the plant, including inside buildings, according to NFPA 72 and the Australian regulations. Upon manual activation of MACs, an audible alarm will automatically alert personnel near the MAC of confirmed gas leakage, LNG/LPG leak, and/or fire. Simultaneously, appropriate emergency operations (such as equipment depressurization/shutdown, fire water pump start, HVAC shutdown for buildings and/or release of extinguishing agents) will be carried out, as required.

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 20 of 22

Manual call points need to be hard wired to the system with line monitoring function. For ESD push button as the cause of each ESD level, please refer to Emergency Shutdown and Depressurizing System Philosophy, L290-AP-PHI-0002. For the push button for activating active fire protection philosophy, please refer to Active Fire Protection Philosophy, L790-AF-PHI-0001. 4.9

Low temperature spill detector Low temperature (cryogenic) spill detectors shall be used to detect LNG/mixed refrigerant (MR)/LPG spills. Detectors shall be provided at the lowest points of potential cryogenic liquid leak areas or in the impounding basins. At least two (2) spill detectors shall be provided in each impounding basin. 2oo2 voting shall automatically initiate the high expansion foam system if provided on each impounding basin for vaporization control of both LNG as well as fire control (if ignition has occurred) of LNG pool fires only.

5.

ALARM AND ACTION Audible fire and gas alarms should be provided in all areas of the plant including buildings. The type of alarm (i.e. siren, horn) and its operation should comply with the relevant regulations. External gas visual alarm shall be provided at the field located near main approach to module/equipment, e.g. the stair of the module, to prevent the approach of operator when the hazard occurs. External fire visual alarm shall be provided at jetty entrance to alarm personnel of fire at jetty head. External fire and gas visual alarm outside the building located near the main entrance or be visible from the main approach to the building to indicate fire alarm building in accordance with AS 1670.1. Audible and/or visual alarms to be provided in all areas throughout the plant to automatically/manually alert personnel of confirmed gas leak, LNG leak, and/or fire as shown in Table.2 Typical C&E matrix below. The whole plant will be divided into several fire/gas alarm zones. Fire alarm zone is established per unit. Therefore, the extent of Fire alarm zone shall be consistent with unit e.g. LNG Train, Inlet facilities, LNG Tanks or Utility area. Gas alarm zone is established per module/ active fire protection zone to prevent the approach of operator during gas leak. Fire audible alarm will be notified through PA/GA system interfaced with FGS to the relevant fire alarm zone. Gas audible alarm will be notified by gas alarm horn. Fire visual alarm, Gas visual/audible alarm will be notified using FGS digital output signal. For the configuration of overall FGS and the interface with PA/GA system, please refer to L830-DF-BFD-0001.001, Overall FGS Block Flow Diagram. Upon outdoor detection of gas, people in the relevant gas alarm zone will be notified automatically through gas alarm horn and gas visual beacon. Upon outdoor detection of fire, people in the relevant fire alarm zone will be notified automatically through audible alarm from PA/GA. If fire or gas is detected inside a building, people in the building will be notified automatically. In case that ESD is initiated by fire or gas detection, people in plant wide area and buildings will be notified by alarm after operator will confirm. For the actuation of fixed fire protection system, please refer to L790-AF-PHI-0001, Active Fire Protection Philosophy.

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 21 of 22

1

Pushbuttons in CCB (Manual) 1)

2

Automatic ESD from F&G

X

3

Single (1ooN, N ≥1) Low Level Gas (10% LEL) Field Area

X

4

Single (1ooN, N ≥1) High Level Gas (50% LEL) Field Area

X

5

Confirmed Gas (2ooN, N≥3) Low Level Gas (10% LEL) Field Area

X

6

Confirmed Gas (2ooN, N≥3) High Level Gas (50% LEL) Field Area

X

7

Single Spill (1oo2) Low Temperature Spill Detector, Spill Impoundment

X

8

Confirmed Spill (2oo2) Low Temperature Spill Detector, Spill Impoundment

X

9

Single (1ooN, N≥1) Flame Detection Field Area

X

10

Confirmed Fire (2ooN, N≥3) Flame Detection Field Area

X

X

X

11

Confirmed Fire (2oo2) Flame Detection, Spill Impoundment

X

X

X

12

Outdoor Manual Call Point

X

X

X

18

Single (1ooN, N≥3) High Level Gas (50% LEL) at Turbine Enclosure or fired heater Air Intake

X

19

Confirmed Gas (2ooN, N≥3) High Level Gas (50% LEL) at Turbine Enclosure or fired heater Air Intake

X

20

Single (1ooN, N≥2) Flame Detection in Turbine Enclosure

X

X

X

21

Confirmed Fire (2ooN, N≥2) Flame Detection in Turbine Enclosure

X

X

X

X

23

CO2 Activation in Enclosure

X

X

X

X

24

Single (1ooN, N≥1) Low Level Toxic Gas

X

X

X

25

Single (1ooN, N≥1) High Level Toxic Gas

X

X

X

X X

X

X

X

X

X

Automatic ESD

High Expansion Foam System Associated Impounding Pond Pump Shutdown Isolate general Power and Welding Outlets

X

CO2 Extinguishant

Fixed Fire Water Systems

X

Fixed Water Curtain Systems

PA/GA (Plant wide)

Enclosure Gas Beacon

Enclosure Fire Beacon

Enclosure Gas Alarm

Enclosure Fire Alarm

PA/GA(in fire area)

Gas Horn (in gas alarm zone)

Alarm in CCB

Initiator

Gas Beacon (in gas alarm zone) Fire Beacon (only at jetty entrance)

Table 2. Typical C&E matrix for Fire and Gas alarm and the relevant action (Outdoor)

X

X

X

X

2)

3)

4)

X X X

X

X

5)

X X X

X

X

5)

X

X 4)

INPEX Operations Australia Pty Ltd ICHTHYS ONSHORE LNG FACILITIES FIRE AND GAS DETECTION PHILOSOPHY

COMPANY Doc. No. L830-AF-PHI-0001 JKC Doc. No. S-0830-1241-0001 Rev. A Sheet No. 22 of 22

Note: 1) Manual push buttons shall be provided for each relevant alarm and action. All actions except for this manual activation in this matrix will be executed automatically 2) Water curtain system in LNG Train 1/2 area will be automatically activated with 2ooN voting. Water curtain system in Jetty will be manually activated 3) Only applicable for the area where the high concentrate flammable gas cloud could reach 4) Gas Detectors in Jetty head, Refrigerated Storage Area, Air Inlet of Fired Heaters and Gas Turbine Enclosure 5) Applicable for jetty head and Refrigerated Storage Area

2

Confirmed Fire (Outdoor)

X

13

Common Fire Detection in Building

X

14

Single (1oo3) Low Level Gas (10% LEL) at Building Air Intake

X

15

Confirmed Gas (2oo3) Low Level Gas (10% LEL) at Building Air Intake

X

X

16

Single (1oo1) Low Level Gas (10% LEL) at Building Air Lock

X

X

17

Single (1oo1) High Level Gas (50% LEL) at Building Air Lock

X

X

18

Single (1ooN, N≥3) High Level Gas (50% LEL) in rooms 2)

X

19

Confirmed Gas (2ooN, N≥3) High Level Gas (50% LEL) in rooms 2)

X

20

Single (1ooN, N≥3) High Level Gas (50% LEL) around transformers 2)

X

21

Confirmed Gas (2ooN, N≥3) High Level Gas (50% LEL) around transformers 2)

22

Indoor Manual Call Point

Building Electrical Isolation with Time Delay (LIR)

X

Building Electrical Isolation (LER)

X

Transformer Trip

HVAC System Shutdown

HVAC System Recirculation Mode

Building Fire Beacon

X

PA/GA Announcement (Buildings)

Pushbuttons in CCB (Manual) 1)

PA/GA (Plant wide)

1

Building Gas Beacon

PA/GA(in area)

Alarm in CCB

Initiator

Building Fire/Gas Audible Alarm

Table 3. Typical C&E matrix for Fire and Gas alarm and the relevant action (Buildings)

X X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

1) Manual push buttons shall be provided for each relevant alarm and action. All actions except for this manual activation in this matrix will be executed automatically 2) Applicable for building located in the area where high concentrate flammable gas cloud could reach.