Risk Management for Transport in the Closure phase
Table of Contents
Objective
The objectives of this activity are to:
- Undertake closure risk management planning and modification as required for the transportation asset. Implementation of risk mitigation options for high level project risks and associated quantification of impact
Major Deliverables
- Delivery of closure risk management plans relating to transport operations and associated infrastructure
- Modification of risk ranking register for various transport closure operations including pipeline depressurisation
Tasks
Specific tasks include the following:
- Execution of major risk management pipeline closure programmes this should including an outline and assessment risk management required for major hazards
- Ongoing mitigation requirements from full operation to pipeline decommissioning
- This will include key risks considering:
- Pipeline operational regime, considering the following factors
- Operating pressure
- Operating temperature
- Gas mixture composition
- Corrosivity
- Ambient temperatures
- Pipeline control (SCADA)
- Pipeline operational regime, considering the following factors
- Cross reference to transport ‘health and safety operation’ frame considering potential site locations and hazard register requirements
- Development of commercial risk analysis with regards to capital funding/opex requirements
- Risk analysis for associated infrastructure for transportation network including CO2 booster plant, line packing requirements and CO2 injection facilities
- The decision analysis going forwards for risk should cover the following items:
- Assessment of performance margin
- Engineering judgement
- Sensitivity analysis
- Quantitative risk assessment
- System reliability assessment
- Consideration of key design parameters on operational conditions such as;=:
- Effect of cooling from pressure changes
- Requirement for dehydration of CO2
- Routing topography
- Dispersion pattern
- Valve materials
- Compressor, seal, and auxiliary materials
- Requirement to minimize flow transients
- Planning for major risk issues related to pipeline depressurisation need to be considered. Safety zones in the vicinity of the vent stations need to be established and controlled during a vent situation
- The potential risks associated with low temperature effects and formation of solid state CO2 at low points in the pipeline. The temperature reduction inside the pipeline relates to the pipeline design, operating conditions, ambient conditions
- Simulations should be performed to determine the thermo hydraulic response of the pipeline or pipeline segment. The depressurization procedure should document with sufficient margin that:
- Local pipeline temperature less than the design temperature does not occur, including steel pipe as well as internal and external coatings
- Local pressure is maintained above the triple point pressure so as to prevent solid CO2 formation
Examples
- Guide on Project Risk Analysis and Management
- HSE Construction (Design and Management) regulations 2007
- International carbon capture and storage projects: overcoming legal barriers
- Qualification procedures for CO2 capture technology
- Carbon Dioxide Pipelines: A Preliminary Review of Design and Risks
- Recommended Practice DNV-RP-J202: Design and Operation of CO2 Pipelines
- Carbon Capture and Storage Regulatory Test Toolkit
- http://www.co2captureproject.org/
Key Personnel
- Project Manager
- Health and Safety Manager
- Engineering Manager
- Key Engineering Sub-Contractors
- Commercial Manager
This content expresses the point of view of individuals in the CCS community and not necessarily the views of their organisation or the Global CCS Institute.
