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Piper Alpha – 167 casualties – Gas leak which led to explosion due to unfinished routine maintenance and lack of communication between crew - pressure testing to validate robustness against overpressure and leaks.

Assessed risks of gas leak and explosion.

Alexander L Kielland – 123 casualties – Platform turned upside down and became submerged when a bracing on one of the five legs failed

BP Deepwater Horizon – 11 casualties – A sudden rush of natural gas burst through the concrete core of the well causing the rig to explode

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4.8Interfacing Systems – Identify any systems that interface with the Oil SSTS, and identify any potential safety aspects that should be considered.

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4.8Interfacing Systems – Identify any systems that interface with the Oil SSTS, and identify any potential safety aspects that should be considered.

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4.6 Regulator approvals and certificates

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4.6 Regulator approvals and certificates

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UK CE certification

HSE approval

COSHH certificates for hazardous substances

Etc.

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None identified at current time

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1. Flammable substances - C

2. Electrical sources - C

3. Exhaust gases - C

4. Hostile acts - C

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Outstanding actions:

1. Assess all credible hazards for ALARP

2. Generate risk register and assign risk owners

3. Collate the remainder risks of the implementation of the Oil SSTS into the Oil Rig

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1. Flammable substances - Burns; death by burning or smoke inhalation.

2. Electrical sources - Individual comes into contact with live equipment; electric shock; arc flash

3. Exhaust gases - Polluted environment; asphixiation and death; lung issues

4. Hostile acts - Delibrate damage to infrastructure; Co-ordinated armed attacks

5. etc.

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We have identified the safety requirements and have a safety management plan. Prior to being ready for initial gate, we would require clarification on the following: Environmental Risks, Project Costs, Overall Budget, Project Management Risks (Cost, Scope), Supply Chain, Logistics, Operational Risks, Technical / Engineering Risks, Compliance with Regulations, Publicity viewpoint (building another country an oil rig).

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The main areas of residual risk. 1) Well head pump failure increases risk when working on the separator and overfilling of the separator and activating PRV. Potential oil leak from PRV 2) Storage valve failure leading to overfilling of storage tank and activation of PRV, leading to potential oil leak. 3) Tanker valve failure increases risk of oil present when working on pump or metre; also increases risk of overpressure in line if manual valve is shut; also increase risk of overfilling of tanker and subsequent leak if manual valve is shut.

Any limitation on operation that the operator should be made aware of. Caution: Automated valves may open inadvertently. Reduce maximum storage tank level to factor in redundancy of space in case of excess oil transferred to tank. Additional mitigations to implement: - lock out/tag out system (LOTO) to be enabled via disconnecting valve from control system when system needs to be isolated e.g. during maintenance (although may increase risk of other automated systems such as fire suppression then not working); - Implement full time observation of automated valves and/or pressure sensors and meters to spot when a valve accidentally opens.

What PPE is required. No change in PPE required (gloves, goggles, overalls, appropriate footwear); however, increase in using PPE to include being in the proximity of the SSTS in case of unintended valve opening leading to oil leak.

What other activities/evidence is required to ensure the safe operation of the Oil SSTS. Increase training, manning and observation; collect evidence on frequency of failures and conduct trend analysis.

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5.0 Emergency / Contingency Arrangements

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5.0 Emergency / Contingency Arrangements

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4.1 - This Oil SSTS shall:

Meet the requirements of DSA01: partially met - requires further assessment.

Have the capability to store separated oil between tanker transfers, complying with the Control of Pollution (Oil Storage) Regulations - met

Be able to operate in all weather conditions prevalent in the region - unknown, conduct stress testing.

Be able to readily isolate the well and oil transfer system within 10 seconds - met

Be able to receive crude oil from the extraction point of the rig, at pressures up to 20bar - met

The system shall have the means to be operated continuously - met (assumed)

Be able to accurately meter for quality and quantity the transfer of oil to the tanker - partially met, measures quantity but not quality. Investigate quality measuring equipment.

Comply with HSE Legislation - met (assumed)

The number of personnel to operate the system shall be minimised - met

Be capable of separating out water, solid particles and gas from the crude oil - met

Comply with the Control of Noise at Work Regulations - met; review and identify where regulations are not met.

The Oil Rig will be fitted with a fire detection and alarm system in all modules and on the open deck - partially met, systems in limited locations - review options for additional fire suppression systems.

4.2 Pressure Systems, Flammable Substances, Noise, Burns, Electrical Sources, Contaminated Water Supply, Exhaust Gases, Hostile Acts, Defective Equipment, Flammable Substances, Ineffective Seperation.

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3.0 Progress against Programme -                              3.1 Progress against the SMP – Capture how the project is progressing against the defined safety management plan                                                              3.2 Areas of Project Risk – Capture any areas of project risk, that could undermine your safety strategy and achieving the safety milestones. Each risk should be accompanied by a strategy how it will be mitigated

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3.0 Progress against Programme -                              3.1 Progress against the SMP – Capture how the project is progressing against the defined safety management plan                                                              3.2 Areas of Project Risk – Capture any areas of project risk, that could undermine your safety strategy and achieving the safety milestones. Each risk should be accompanied by a strategy how it will be mitigated

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3.1 Since the last SCR, we have conducted Preliminary Hazard Analysis against Option 3; used this to inform a risk assessment and identified the credible safety risks. An ALARP assessment has been conducted for each of the credible hazards, supported by a CBA where hazards were judged as not ALARP to identify further possible mitigations.

3.2 Environmental Risks, Project Costs, Overall Budget, Project Management Risks (Cost, Scope), Supply Chain, Logistics, Operational Risks, Technical / Engineering Risks, Compliance with Regulations, Publicity viewpoint (building another country an oil rig).

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2.0 Assumptions – Capture any assumptions that underpin the safety case for main gate, this could include assumptions about the scope, safety requirements, operational profiles, time in service, operating environment etc. This list will be different from the Initial Gate SCR because you now have more technical information

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2.0 Assumptions – Capture any assumptions that underpin the safety case for main gate, this could include assumptions about the scope, safety requirements, operational profiles, time in service, operating environment etc. This list will be different from the Initial Gate SCR because you now have more technical information

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Be operated by SQEP personnel

Operate for a minimum service life for 20 years

Equipment maintained in accordance with approved maintenance schedules

Equipment operated within defined parameters as laid down by equipment authorities

Assuming that the oil rig will be operated in the Caribbean

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1.0 System Description: Capture a brief description of your preferred solution, with sufficient details that the reader understands the boundary and the scope of the safety case (People, Equipment, Activity and Organisation), and interfaces with other safety cases.

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1.0 System Description: Capture a brief description of your preferred solution, with sufficient details that the reader understands the boundary and the scope of the safety case (People, Equipment, Activity and Organisation), and interfaces with other safety cases.

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Our focus for this safety case will be for the Oil SSTS, not for the whole oil rig platform. The Oil SSTS receives hydrocarbons direct from the well head into a separator which acts to remove gas which is to be released via a flame tower, water which is sent for further processing to enable use on the rig and sediment which settles out. The processed oil then passes to storage tanks. This safety case will interface with those corresponding to other activities on the oil rig, including those for: diesel generator and tank; water desalination plant, communications tower and helicopter pad.