Overview

The objective of this workshop is to develop and incorporate safety requirements into trials planning, as part of the activity to realise evidence for the safety case.  In addition, to consider the safety of the trials themselves and the role of safety in trials development

Task

Developing the ITEAP

Update the table below for each SRD requirement selected, using the dropdown box, to identify:

  • How the requirement will be verified (design, test, calculation, inspection, etc).
  • Detail how the verification will be undertaken (e.g. a test plan).
  • Define the acceptance (pass/fail) criteria.
  • State when in the CADMID cycle the verification will be undertaken (this could happen at several stages, depending on the test).
  • Identify if a SCR is required to support the verification assessment.
wdt_ID SRD Requirement Verification Strategy Verification Details (Specific details of the test, etc) Acceptance Criteria Stage of CADMID SCR needed to conduct verification
295
296 Overpressure (Gas and/or fluid) of the system shall not result in Catastrophic repercussions, at less than 1E-6 per year Analysis, Test, Design Testing of individual components to max working pressure. Pass/Fail Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration Yes
297 The Hydrocarbon Separator shall prevent Oil leakage into the oil rig water conditioning system Design, Test, Inspection, Trials Test - individual components to 25bar, Inspection - routine inspections and monitoring, Trial - Run through with water only and test for leaks Pass/Fail Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration Yes
298 Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration
299 The Oil SSTS shall detect and suppress any fire or excessive heat . Design, Tests & Trials, Analyse, Certification FATS & SATS of fire detection systems Pass/Fail Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration Yes
300 The Oil SSTS shall not breach Control of Noise at Work regulations Design, Measure, Calculation Test machinery using noise meters Max & Mean Noise exposure calculation based on Regs Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration Yes
301 The oil transfer system from the Well Head to the Separator shall be capable of withstanding Oil Pressure up to 20 bar, under all operating conditions Design, Test Test of individual components to max pressure (25bar) Pass/Fail Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration Yes
302 The system shall have the ability to isolate the Oil SSTS from the Tanker within 10s of sensing overpressure Design. Test, Measure FATS & SATS to measure closing time Pass/Fail Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration Yes
303 The system shall have the ability to isolate the well head from the Separator within 10s of sensing overpressure Desigm, Test, Measure Test of individual components to max pressure (25bar) Pass/Fail Concept, Assessment, Manufacture, In-Service, Disposal, Demonstration Yes

Trials – Hazard Identification

Before trails are undertaken, it may be necessary to undertake hazard identification and assessment to ensure the trials can be conducted safely. Consider your SRD requirements above and those associated with the pressure requirements of the OIL SSTS, or an element of. Develop your Test Plan in the table above to with sufficient detail to allow the team to undertake a hazard assessment of the proposed test, using the ASEMS hazard checklist guidewords and the table below to capture your output.

wdt_ID Hazard ID Hazard Title / Description Causes Control / Safeguards Accident Description Recommendations / Actions
50
51
52
53
54 1 Over Pressure of System Pressure building from PVR failure, Blockage in pipeline, Component failure, Sensor failure or delayed detection of pressure spike
Valve malfunction or delayed actuation		 Gradual pressure increase as test progresses, verification of component serviceability prior to test, Automated isolation valves with <10s response time, Pressure relief valves and surge tanks Over pressure of system leading to structural failure and potential damage to personnel/equipment. Carry out test prior to FOC. Carry out test regularly, Emergency shutdown procedures and drills. trg of personnel. Independent verification of pressure containment capability
55 2 Injury to Exposure to loud noises Machinery not functioning as designed, Personnel not wearing appropriate PPE, personnel to close to machinery. Wear appropriate PPE, ensure personnel are far enough away, Regular tests for noise levels by external assurance, Risk assessment raised and signed off by risk holder. Trg of personnel. Shift rotation and exposure limits. Maintenance to reduce mechanical noise Injury of personnel when exposed to loud noise follow the safeguards
56 3 Fire detection Fire or heat source, Suppression system malfunction
Electrical fault or hydrocarbon leak ignition
Human error in alarm response		 Distributed fire detection sensors (IR, smoke, heat)
Automatic fire suppression systems (foam, inert gas)
Alarm systems with redundancy and remote alerting
Fire-resistant materials and compartmentalization		 Fire damage or death to personnel/equipment Fire drills and crew training
Manual firefighting equipment and access routes
Regular inspection and testing of fire systems
Integration with platform-wide emergency response system
57
58 4 Oil Spill or leak Seal failure in separator
Overflow due to poor level control
Corrosion or mechanical damage
Inadequate bunding or containment		 Environmental monitoring and sampling
Emergency spill response kits and procedures
Regular inspection and maintenance of seals and tanks
Isolation valves to prevent cross-contamination		 Spill of oil from the system due to structural failure or over pressure in the system. Causing harm to personnel, equipment and environment Leak detection sensors
Secondary containment systems
Separator design with overflow protection
Compliance with Oil Storage Regulations
regular maintenance and inspections of the system
59 5 Unable isolating the Oil rig to ship Transfer System (SSTS) from the Tanker within 10 seconds of detecting overpressure Failure of valve, monitoring system or automated shut off command. Redundant pressure sensors with real-time diagnostics
Usage of PRVs within the system
Automated isolation valves with <10s actuation time
Hardwired emergency shutdown (ESD) circuits
Regular functional testing of isolation logic and valve actuation
regular maintaienace and inspections 		Oil spill or over pressure of the system if unable to shut off oil flow within 10 Secs Crew training on emergency response and manual override
Periodic drills simulating overpressure scenarios
Independent verification of system response time
Backup power supply for critical control systems