Page 447 - Offshore Electrical Engineering Manual

434 CHAPTER 2 Preparation and Use of Performance Standards

INSTALLATION: PERFORMANCE STANDARD: INTERNAL COMMUNICATIONS (cont.)

Functions Element Assurance
3 To provide essential a) The central control systems for the communications are all By Design
control equipment for located within the TR
the communications
systems within a During ESD situations, non-essential equipment and supplies are
designated safe area disconnected for safety reasons. Equipment that remains
such that operational includes: PA, PABX, hand portables, INMARSAT,
communications may VHF radio, repeater and status systems, and navigation
be maintained in the equipment.
event of hazard.
4 To provide a redundant a) A fibre optic link with redundant fibres is provided between Referencemaintenance
link between the these installations to provide as a minimum data and status of procedure XXXXX.
Installation and other the safety systems.
installations in the field
5 To provide visual a) Visual warning in the form of high intensity amber coloured
announcement of flashing beacons are provided to supplement audible alarm Reference maintenance
emergency in high signals and emergency announcements in all areas, where procedure XXXXX.
noise areas ambient noise is 85 dBA or greater.
6 To provide safe An UHF (FM) radio repeater system is installed to enhance full Reference maintenance
mobile duplex radio communications between personnel using hand procedure XXXXX.
communications portables. In the event of failure the hand portables are equipped
between control with simplex channels to allow communications, hand portable to
rooms and all areas hand portable, between personnel on the facility.
a) Intrinsically safe multi-channel mobile FM VHF & UHF
hand portable radios with mains, single and multi,
chargers are provided for use by production,
maintenance, crane operating and safety personnel.
Private channels are used for communications with the shuttle
tanker, supply vessels, crane cabs and hand portables. Each
crane is equipped for communication with supply vessels.
7 To provide safe A distributed emergency intercom system, fully certified for use Reference maintenance
communications in hazardous areas, provides voice communication between procedure XXXXX.
between control control centres, muster areas and lifeboat locations.
rooms and muster
areas.
8 To provide a call a) A radio paging system with facility for sending verbal Reference maintenance
system to essential messages, which may be accessed from the installation procedure XXXXX.
personnel in the telephone systems, enables key personnel to be paged.
event of an incident
b) Telephones shall be clearly marked and sign-posted.
9 To provide visual Closed circuit television (CCTV) is installed at various Reference maintenance
monitoring for strategic positions on the Installation to allow control room procedure XXXXX.
Control Room operators to watch high-risk areas of the installation.
Personnel. High risk areas of the FPSO covered by CCTV include CCTV
viewing of cargo offloading areas, flare and PAUs,and also
helideck.
10 Provide fail-safe a) A telemetry system is installed on the FPSO to facilitate Reference maintenance
operations and supervisory and control of the off-loading system. procedure XXXXX.
shutdown of cargo in b) The CCR also provides voice communication between the
the event of a problem FPSO control room, Machinery, and the shuttle tanker loading
on the shuttle tanker. control point (aft).
11 Prevent toxic spill to Chemicals and fuel to be provided with secondary containment -
Environment where necessary [No inventory related to internal coms]
Reliability & Reference
Availability
The Internal coms system is based on a duplex system, operating in parallel. Safety Case
The system monitors its own status and its power supplies and alarms all faults. Sect. XXXXX
The specified availability of the Internal system is as follows:
∑ 99.1%
The availability figure specified is the equipment availability of communication to each field Reliability Report
instrument. Doc No. XXXX
FIGURE 9.2.1, cont’d