Kingsnorth Carbon Capture & Storage Project Page 3 of 1 Sign up to vote on this title Pipeline HAZID/ENVID Report
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The overall objective of the HAZID/ENVID was to, wherever possible; ensure that the inhe safety, health and environmental principles are applied to the project design and to presc
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Kingsnorth Carbon Capture & Storage Project Page 14 of 1 Sign up to vote on this title Pipeline HAZID/ENVID Report
Appendix B: Completed HAZID/ENVID Worksheets
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6.40 Offshore Platform Hazid
2.Hazard Identification
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KCP-GNS-SHE-HZI-0001 Revision: 02 Project Title:
Kingsnorth Carbon Capture & Storage Project
Document Title:
Pipeline HAZID/ENVID Report
HAZARD SCENARIO
CAUSES
CONSEQUENCES
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Page 15 of 17
POTENTIAL IMPACT TO PEOPLE ON AND OFFSITE
POTENTIAL IMPACT TO THE ENVIRONMENT
RECOMMENDED SAFEGUARDS
The onshore section of the pipeline from the discharge of the Kingsnorth power station CO2 compressors up to (and including) the landfall valve. Toxicity (of CO2)
Loss of containment of CO 2 from pipeline, caused by corrosion (external or internal), third party intervention, flange leak, mechanical failure, upheaval buckling, geomovement,buoyancy.
Loss of containment of CO 2.
Potential multiple fatalities due to toxic/asphyxiant effects of CO 2 release. Cryogenic impact. Potential for reputational damage to E.ON from persistent leak.
Potential fatalities to local species and short term impact on habitat.
Dryness specification for CO2 from site – coupled with monitoring and trip system to protect pipeline against internal corrosion. Use of a technology that does not give an instant loss of dryness for CO 2 should be used. Adequate margin between trip point and water dropout to be maintained. Internal corrosion allowance (1.5 mm allowance).
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Pipeline Integrity Management System (PIMS) (for internal and external corrosion monitoring functions and pipeline route inspection).
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External corrosion protection measures: impressed current, pipeline coating. Pipeline burial depth and markers. Security arrangements for landfall valve location (to be defined). Leak detection system (to be defined)
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6.40 Offshore Platform Hazid
2.Hazard Identification
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KCP-GNS-SHE-HZI-0001 Revision: 02 Project Title:
Kingsnorth Carbon Capture & Storage Project
Document Title:
Pipeline HAZID/ENVID Report
Page 16 of 17
HAZARD SCENARIO
CAUSES
CONSEQUENCES
1.10
Isolation and venting
Onshore pipeline emergency
Requirement to vent down onshore pipeline CO2 inventory.
Prolonged exposure of personnel to loss of containment.
Increased amounts of CO2 released into environment.
1.11
Access
Presence of significant number of heavy construction vehicles during installation.
Potential to impact on local roadways and infrastructure.
Personal inconvenience and harm during construction activities.
N/A.
1.12
Discharges to Water
Requirement to use treated seawater to undertake hydrotesting.
Requirement to discharge water after use.
No concern.
May lead to environmental impact.
Discharge of hydrotest water will require consent.
1.13
Electrical systems
Use of impressed current corrosion protection systems, on CO2 pipeline and other systems crossed using similar systems.
Interaction between cathodic protection systems resulting in ineffective corrosion inhibition eventually leading to loss of
Potential multiple fatalities due to toxic/asphyxiant effects of CO 2 release. Cryogenic impact.
Potential fatalities to local species and short term impact on habitat.
Pipeline design will be to relevant codes which specify the s tandard for pipeline crossings. PIMS to include monitoring of CP systems.
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POTENTIAL IMPACT TO PEOPLE ON AND OFFSITE
POTENTIAL IMPACT TO THE ENVIRONMENT
RECOMMENDED SAFEGUARDS
Isolation and blowdown routes (onsite).
Traffic Management Plan, to manage interactions with local services and
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6.40 Offshore Platform Hazid
2.Hazard Identification
Search document
KCP-GNS-SHE-HZI-0001 Revision: 02 Project Title:
Kingsnorth Carbon Capture & Storage Project
Document Title:
Pipeline HAZID/ENVID Report
HAZARD SCENARIO
CAUSES
CONSEQUENCES
Sheet Music 2 2.1
Page 17 of 17
POTENTIAL IMPACT TO PEOPLE ON AND OFFSITE
POTENTIAL IMPACT TO THE ENVIRONMENT
RECOMMENDED SAFEGUARDS
From the landfall valve along the shore approach up to and including the Kingsnorth Offshore Platform riser base. Toxicity (of CO2).
Loss of containment of CO 2 from pipeline, caused as above, plus ship anchors, dropped objects, scour, fishing, free spanning due to sand waves.
Loss of containment of CO 2.
Potential multiple fatalities due to toxic/asphyxiant effects of CO 2 release. Cryogenic impact.
Minimal impact on local species and short term impact on habitat.
Pipeline first 45km is trenched and backfilled to a depth of 2 m, with localised areas of 3m depth with rock and gravel dumping as additional protection. Presweeping of sand waves to reduce vulnerability to spanning.
Tie-in spools concrete mattresses. Sign up totobe protected votebyon this title
Vessel instability due to subsea release.
Potential for reputational damage to E.ON from persistent leak.
Pipeline surveys to monitor seabed movements and damage to pipeline.
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Pipeline route to be clearly identified on Admiralty charts and in discussions with fishing organisations. Mass balance reconciliation to identify any gross disparity in pipeline flow to platform – applicable over relatively long term periods.
2.2
Pressure.
Liquid lock-in and warm-up of CO2, causing overpressure and loss of
Loss of containment of CO 2
As above.
As above.
Further evaluation is required to determine if this is a credible hazard.
