GN Outline - Vessel facilities exposed to external hydrocarbon - - PowerPoint PPT Presentation

GN Outline - Vessel facilities exposed to external hydrocarbon hazards

Jeremy Dunster – Manager A & I

IMCA/NOPSEMA Workshop – NOPSEMA Offices Perth 23 February 2016

• Introduction
• Facilities, AOPs and Vessels
• GN Outline

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Agenda

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Introduction

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• - -
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• CID NOPSEMA

nopsema.gov.au • •

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Why – a key driver

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CD NOPSEMA

• Specifically for vessel facilities exposed to

external hydrocarbon hazards

• Focus on activities, HAZID, FERA, EERA and

hydrocarbon emergency control measures

• Links to existing SC GNs

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What – A supplementary GN

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Facilities, Associated Offshore Places and Vessels

OPGGSA Schedule 3, clause 4 (1) A vessel or structure is taken to be a facility for the purposes of this Schedule while that vessel or structure: (a) is located at a site in Commonwealth waters; and (b) is being used, or prepared for use, at that site: (i) for the recovery of petroleum, for the processing of petroleum, or for the storage and offloading of petroleum, or for any combination of those activities (4) A vessel or structure used for a purpose referred to in subparagraph (1)(b)(i) includes: (a) any wells and associated plant and equipment by means of which petroleum processed or stored at the vessel or structure is recovered; and (b) any pipe or system of pipes through which petroleum is conveyed from a well to the vessel or structure; and (c) any secondary line associated with the vessel or structure.

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“Production” Facilities (1)

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“Production” Facilities (2)

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CD NOPSEMA

OPGGSA Schedule 3, clause 4 (1) A vessel or structure is taken to be a facility for the purposes of this Schedule while that vessel or structure: (a) is located at a site in Commonwealth waters; and (b) is being used, or prepared for use, at that site: (ii) for the provision of accommodation for persons working on another facility, whether connected by a walkway to that other facility or not; or (iii) for drilling or servicing a well for petroleum or doing work associated with the drilling or servicing process; or (iv) for laying pipes for petroleum, including any manufacturing of such pipes, or for doing work on an existing pipe; or (v) for the erection, dismantling or decommissioning of a vessel or structure referred to in a previous subparagraph of this paragraph

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“Vessel” Facilities (1)

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• OPGGS(S) Reg 1.6 – activities that exclude a vessel or

structure from being a facility

• OPGGS(S) Reg 1.7 (1) – activities that exclude a vessel or

structure from being an AOP

• Diving and dumb barge hipped up to facility not excluded

from being an AOP

• Reg 1.7(1) does not apply where “a facility is causing a risk

(other than an ordinary marine risk) to the vessel or to persons on the vessel”, e.g. from hydrocarbon hazards

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Facility, AOP, Vessel

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GN Outline

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• - -
• - -
• CID NOPSEMA

nopsema.gov.au • •

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Focus Areas

Safety Management System Description Formal Safety Assessment Description Facility Description Monitor, Audit and Review

Description of Technical Controls including:

Emergencies Activities and Operating Parameters General Description

Machinery and Equipment Safety Measures HAZID Risk Assessment Emergencies (EERA, FERA) Performance Standards

Description of Procedural Controls including:

Identification of Control Measures Implementation and Improvement of the SMS Scope (Activities) OHS Risk Management Maintenance Communication Emergencies Safety Measures

Comprehensive and Integrated

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• What

– Activities

• Where

– Location and associated features

• When

– Time of year and associated met ocean implications

• How

– Techniques, equipment and people

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Activities: Operational Boundaries (1)

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• Project Specific scope

– Operational boundaries well defined, access to actual data from facility operator – Likely to be a simpler case with less uncertainty >> less conservatism anticipated – Should result in the incorporation of only additional control measures that will be required – Revisions on a per project basis as required

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Activities: Operational Boundaries (2)

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• Generic (non-project specific) scope

– Requires operational boundaries to be assumed and associated data sourced or estimated – Potentially more complex case with higher levels of uncertainty >> more conservatism expected. – May result in the incorporation of additional control measures that are seldom required. – Revisions based on proposed work vs operational boundaries of case, requires review for each project

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Activities: Operational Boundaries (3)

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• Hazards with the potential to cause an MAE
• Hydrocarbon hazards associated with vessel

facility activities, and;

• Hydrocarbon hazards from concurrent activities

by other facilities and / or vessels with the potential to impinge on vessel facility

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HAZID (1)

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• Hydrocarbon inventories:

– Wells – Risers – Flowlines/Pipelines – Topsides facilities

• Platforms
• FPSO/FSO
• Fluid compositions

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HAZID (2)

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• Fires & explosion that could occur at the facility
• Consider a range of measures for:

– Detection, Elimination & Risk reduction – Manual and automatic detection, control & extinguishing fires and leaks or escapes of petroleum – Isolating & storing hazardous substances

• Consider the EERA for fires and explosions
• Identify measures to reduce risks to ALARP

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Fire & Explosion Risk Analysis

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• Considerations:

– Jet fires from a production facility – Sea fires – Pool fires on the vessel facility – Gas and vapour cloud explosions

• At an adjacent facility
• At the vessel facility

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FERA (2) - Fires & Explosions

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• Considerations:

– Provision of fixed gas detection at key locations such as:

• Around outer decks and elevated locations,
• Moon-pools,
• large cranes,
• ventilation inlets for engine room(s), machinery

spaces, emergency generators and accommodation spaces and muster areas.

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FERA (3) - Gas detection

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• Vessel ESD systems typically:

– focused on containing internal fires (engine rooms & machinery spaces, accommodation, cargo holds). – do not address redundant systems used to contain and control such internal fires

• Production facility ESD systems typically:

– Focused on minimising fires & explosions – Cascaded from local to entire facility black-out

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FERA (4) – ESD Systems (1)

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• Considerations:

– What to shutdown (deck loads, cranes, → everything except emergency systems) – Where (local, Bridge, Bridge & local) – When (inputs, criteria) – How (Manual, Semi-Automatic, Automatic) – Why (fire & explosion prevention)

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FERA (5) – ESD Systems (2)

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• Considerations

– EX rated emergency equipment, lighting, PA etc – Isolation of cranes and other vessel equipment – Isolation of 3rd party deck equipment – Emergency disconnect/release systems – Ventilation Shutdowns & damper closures

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FERA (6) – Ignition controls

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• Client provided controls

– How do you assure yourself they are functional

• Details of fluids

– composition, pressure, volume

• Dispersion modelling

– Input into FERA

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FERA (7) – Subsea infrastructure

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• Emergencies that could occur at the facility
• Consider a range of measures for:

– Primary & secondary evacuation & escape routes – Procedures for managing evacuation, escape & rescue – Means of, & equipment for, evacuation, escape & rescue – Amenities and emergency communication for TR – Life saving equipment

• Identify measures to reduce risks to ALARP

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Escape, Evacuation & Rescue Analysis

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• Considerations:

– Vessel position vs hydrocarbon hazards – Drift-on, drift-off – Drive-off – Black ships + drift-off – TEMPSC

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EERA (2) - Escape & Evacuation

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• Considerations:

– Emergency disconnect/fail-safe – Soft tethers – Cranes with Manual Override Protection Systems – TEMPSC vs lifeboat

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EERA (3) - Equipment

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• Considerations:

– Location with respect to hydrocarbon hazards and means

• f evacuation

– Level of protection from hydrocarbon events – Capacity – Communications – Ventilation

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ERA (4) - Temporary Refuge

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• ESSA - A technique for demonstrating that

equipment intended to function, or to be used, in an emergency— is fit for its function or use in the emergency (OPGGS(S) Reg 2.14 (2) (b))

• Dispersion modelling – commonly used for

subsea releases.

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Other studies

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• Considerations

– Clear linkage to emergencies identified in FSA – Unambiguous descriptions of hydrocarbon event emergency responses – Drills and exercises for hydrocarbon related events – Timeliness of hydrocarbon related event drills – Interface with production facility plan – Performance standards

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Emergency Planning

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• Considerations

– Existing vessel controls & new additions – Prevention vs mitigation – Uncertainty & conservatism – Client provided controls – Risk reduction & ALARP

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Control measure selection

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• A description that gives details of facility:

– Layout – Technical control measures – Activities

• Specific provisions eg:

– Safety related machinery and equipment – Medical and Pharmaceutical supplies – Emergency comms, control systems

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Facility Description

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• A detailed description of the SMS, that is:

– Is comprehensive and integrated – Provides for risk management – inspection testing and maintenance of control measures

• Specific provisions for:

– Command structure – Workforce competency – Emergency preparedness and medical services

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SMS description

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Any further questions or suggestions?