KCP-GNS-IFS-DPR-0001 Rev.: 03

Project Title: Kingsnorth Carbon Capture & Storage Project Page 1 of 10

Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

Offshore Infrastructure Project Data Table of Contents

1 SCOPE AND FUNCTIONAL REQUIREMENTS ................................................. 3

1.1 SCOPE OF DOCUMENT .................................................................................... 3 1.2 DEFINITIONS .................................................................................................. 3 1.3 ABBREVIATIONS ............................................................................................. 3 1.4 SYSTEM OF UNITS AND CONSTANTS ............................................................... 4

2 CODES AND STANDARDS ............................................................................... 5

2.1 GENERAL ....................................................................................................... 5

3 DESIGN REQUIREMENTS ................................................................................. 6

3.1 DESCRIPTION OF THE OFFSHORE INSTALLATION FACILITIES ............................. 6 3.2 DESIGN LIFE .................................................................................................. 7 3.3 DECK ELEVATIONS ......................................................................................... 7 3.4 ENVIRONMENTAL DATA (PRELIMINARY HOLD 1) ........................................... 7

3.4.1 General .................................................................................................. 7 3.4.2 Water Depths ......................................................................................... 7 3.4.3 Current Profile ....................................................................................... 7 3.4.4 Wave Data ............................................................................................. 7 3.4.5 Marine Growth ....................................................................................... 7 3.4.6 Soil Conditions ....................................................................................... 7 3.4.7 Material .................................................................................................. 7 3.4.8 Corrosion Allowance .............................................................................. 8 3.4.9 Corrosion Protection .............................................................................. 8

4 MANDATORY REFERENCES ........................................................................... 9

4.1 REGULATIONS AND STATUTES ........................................................................ 9 4.2 DESIGN CODES .............................................................................................. 9

5 SUPPORTING REFERENCES ......................................................................... 10

5.1 PROJECT DOCUMENTATION .......................................................................... 10

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Project Title: Kingsnorth Carbon Capture & Storage Project Page 2 of 10

Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

Table of Holds HOLD No. Description Section

1 Site-specific environmental data 3.4 2 Water depth and seabed bathymetry 3.4.2 3 Marine growth profile 3.4.5 4 Site-specific foundation soil conditions 3.4.6 5 Project specification for carbon steel 3.4.7

KCP-GNS-IFS-DPR-0001 Rev.: 03

Project Title: Kingsnorth Carbon Capture & Storage Project Page 3 of 10

Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

1 SCOPE AND FUNCTIONAL REQUIREMENTS

1.1 Scope of Document

This document outlines the design data for the offshore infrastructure at the Hewett gas reservoir and collates all of the design data to be used and the assumptions to be made in undertaking the design activities.

The offshore infrastructure for this document is assumed to include the following:

Platform foundations; Platform substructure; Platform topsides structure. This document will be reviewed and updated as necessary during the course of the design to reflect changes necessary to meet E-ON requirements.

1.2 Definitions

COMPANY E.ON UK or its nominated representative.

CONTRACTOR The companies designated on the purchase order form as being the selected Contractor of materials and services.

WORK The task, process or operation being conducted by the CONTRACTOR on any tier on behalf of COMPANY.

Shall Indicates mandatory requirement

Should Indicates preferred course of action

May Indicates optional course of action

1.3 Abbreviations

BS British Standard CO2 Carbon Dioxide COS Carbonyl Sulphide CP Cathodic Protection FEED Front End Engineering Design HAT Highest Astronomical Tide HSE Health and Safety Executive ISO International Standardisation Organisation LAT Lowest Astronomical Tide MMscmd Million Standard Cubic Metre per Day MSL Mean Sea Level MHWS Mean High Water Springs MHWN Mean High Water Neaps MLWN Mean Low Water Neaps MLWS Mean Low Water Springs Mt Million Tonnes MPa Mega Pascals N/A Not Applicable OD Outside Diameter Omni-dir Omni-directional

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Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

SI System International SMYS Specified Minimum Yield Strength SMTS Specified Minimum Tensile Strength SWL Static Water Level W West WHP Wellhead Platform Yr Year

1.4 System of Units and Constants

System International (S.I.) units shall be used throughout the FEED design. The following consistent set of units will be used to describe the offshore infrastructure:

Mass metric tonne, te (kg x 103); Force kiloNewton, kN (N x 103) Length metre, m The following constants will be adopted for the offshore infrastructure FEED designs:

Youngs Modulus for steel, E 2.1 x 108 kN/m2; Poissons ratio, 0.3 Density of steel, steel 7.85 tonne/m3; Density of seawater, sea 1.025 tonne/m3 Coefficient of Thermal Expansion for steel, 12 x 10-6/C

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Project Title: Kingsnorth Carbon Capture & Storage Project Page 5 of 10

Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

2 CODES AND STANDARDS

2.1 General The topsides, substructure and the foundations shall be designed in accordance with the working stress design methods given in API RP2A WSD [Ref. M6], and AISC ASD [Ref. M7]

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Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

3 DESIGN REQUIREMENTS

3.1 Description of the Offshore Installation Facilities

The base-case offshore facility design selected is a new build steel jacket structure supporting a normally unattended integrated deck topsides; the geographical co-ordinates of the offshore injection facilities will be confirmed during the FEED 2 study.

It is envisaged that the base case offshore platform will incorporate the following:

A riser bringing the carbon dioxide (CO2) from the pipeline onto the platform. We currently expect to install an emergency shutdown (ESD) valve to isolate the pipeline CO2 volumes from the platform. This ESD will be installed above the waterline for ease of maintenance;

A pig receiver to receive pigs used to clean or inspect the pipeline, and also to push out CO2 volumes from the pipeline into the reservoir before the pipeline can be depressurised;

A distribution header to distribute the CO2 to the separate wells; Individual flow lines to the Christmas tree on top of each well; Each individual well flowline will incorporate a choke to regulate and adjust the

pressure of the CO2 prior to injection into the reservoir;

Sufficient space to accommodate the equipment necessary for well intervention work, including slickline, electric line and coiled tubing interventions. Note that for coiled tubing operations the coil and personnel will be accommodated on a separate work vessel;

Individual electrical start-up heaters on each of the 4 flowlines. The size of each heater is expected to be less than 1 MW each. The electrical heaters will also require switchgear, transformers and thyristors, which may be of substantial weight and size;

Each well will have a Christmas tree on top of it, including two separate valves capable of completely shutting in the well, and valves allowing access to the wellbore annulus.

A wellhead area able to accommodate four wells with surface Christmas trees. (Note that the four wells are required for injection of the planned initial volumes of CO2 the Base Case. Eight additional slots would be required to enable the platform to be used to inject the full Kingsnorth and potential Thames Cluster CCS volumes in the future);

A crane capable of lifting an electric line unit onto the platform (currently believed to be the heaviest lift onto the platform);

An instrumentation system able to gather temperature and pressure data and video (CCTV) images from various points on the platform and from the in-well data acquisition system, and transmit the data onshore;

A Temporary Safe Refuge (TSR) with helideck, able to accommodate ~15 people for unplanned overnight stays;

Fire and CO2 leakage detection system able to shut the platform down in the event of a CO2 leakage or a fire;

Lifeboat and fire fighting equipment. Diesel fuelled emergency power generation equipment. The normal electrical loads for

the facility will be drawn from shore via a subsea electrical cable.

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Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

3.2 Design Life

It is assumed that the offshore facilities will have a design life of 40 years.

3.3 Deck Elevations

The cellar deck elevation will be set such that the lowest part of the framing members is above the predicted 10,000-year return wave crest elevation. Other deck elevations will be set to allow sufficient space for accommodating the required equipment and utilities and for routing pipework.

3.4 Environmental Data (Preliminary HOLD 1)

3.4.1 General The data presented in this Section were obtained from ref. [S1]. These data are generic in nature and are not known to be specific to the Kingsnorth offshore platform location. The following project-specific studies and surveys should be commissioned and carried out during early FEED 2 in order to provide the required specific data:

Metocean Study; Platform location Geotechnical Survey and seabed bathymetry. Regional metocean data is presented below

3.4.2 Water Depths The water depth at the offshore platform location is 34m ref. [S1]. Detailed bathymetric profiles will be produced by the offshore survey HOLD 2.

3.4.3 Current Profile Regional current profiles are presented in the Basis of Design for Studies document, ref. [S8]

3.4.4 Wave Data Regional wave heights and periods are presented in the Basis of Design for Studies document, ref. [S8]

3.4.5 Marine Growth HOLD 3.

3.4.6 Soil Conditions A site-specific geotechnical survey will be conducted as part of the FEED 2 work. However in the absence of design geotechnical design parameters, the piles may be only partially modelled up to an effective point of fixity, located at a depth of six diameters below the mudline HOLD 4.

3.4.7 Material Primary, special primary and secondary steel materials (Grades S275, S355, and S450) shall comply with BS EN 10225: 2001 - Specification for Weldable Structural Steels for Fixed Offshore Structures, [Ref M8], supplemented by the project specification for carbon steel HOLD 5.

Tertiary steel (Grades S355) shall comply with the following:

BS EN 10025: 1993 - Specification for Hot Rolled Products of Non-Alloy Structural Steels and their Technical Delivery Conditions , [Ref M9];

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Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

BS EN 10210: Parts 1 and 2 - Specification for Hot-Finished Structural Hollow Sections, [Ref M11].

3.4.8 Corrosion Allowance A corrosion allowance, i.e. additional steel thickness to compensate for the effect of metal loss by corrosion on structural members, shall be applied to the substructure members in the splash and atmospheric zones. Elsewhere on the substructure, corrosion protection will be provided by appropriate cathodic protection suitable for the 40 year target design life. The corrosion allowance will be determined during FEED 2.

3.4.9 Corrosion Protection All permanent topsides steelwork shall be protected against corrosion as specified in the project specification for Protective Coatings. Hand-railing, stair treads and open grill floor grating shall be hot dip galvanised. In addition, handrailing shall be painted after galvanizing.

No corrosion allowances shall be applied to the thickness of topsides steel sections. Suitable isolation shall be provided at interfaces between mild steel and aluminium or stainless steel to prevent bi-metallic corrosion (for example wall cladding systems).

KCP-GNS-IFS-DPR-0001 Rev.: 03

Project Title: Kingsnorth Carbon Capture & Storage Project Page 9 of 10

Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

4 MANDATORY REFERENCES

4.1 Regulations and Statutes

The following acts and regulations shall be complied with:

[M1] Construction (Design & Management) Regulations 2007;

[M2] Environmental Protection Act 1990;

[M3] Health and Safety at Work Act 1974;

[M4] Offshore Installations (Safety Case) Regulations 2005;

[M5] Offshore Installations and Wells (Design and Construction, etc.) Regulations 1996.

4.2 Design Codes

[M6] American Petroleum Institute, Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms Working Stress Design,API RP2A - WSD, 20th Edition, July 1993;

[M7] American Institute of Steel Construction, Manual of Steel Construction Allowable Stress Design, AISC - ASD, 9th Edition, 1989;

[M8] British Standards Institution, BS EN 10225: 2001 - Specification for Weldable Structural Steels for Fixed Offshore Structures

[M9] British Standards Institution, BS EN 10025 1-6: 2004 - Hot Rolled Products of Structural Steels

[M10] British Standards Institution, BS4: Part 1: 1993, Structural Steel Sections: Hot-rolled Sections

[M11] British Standards Institution, BS EN 10210-1:2006, Specification for Hot-Finished Structural Hollow Sections of Non0alloy and Fine Grain Steels Part 1: Technical Delivery Requirements

[M12] British Standards Institution, BS EN 10056-1: 1999, Specification for Structural Steel Equal and Unequal Angles.

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Project Title: Kingsnorth Carbon Capture & Storage Project Page 10 of 10

Document Title: Offshore Infrastructure Project Data

Kingsnorth CCS Demonstration Project The information contained in this document (the Information) is provided in good faith. E.ON UK plc, its subcontractors, subsidiaries, affiliates, employees, advisers, and the Department of Energy and Climate Change (DECC) make no representation or warranty as to the accuracy, reliability or completeness of the Information and neither E.ON UK plc nor any of its subcontractors, subsidiaries, affiliates, employees, advisers or DECC shall have any liability whatsoever for any direct or indirect loss howsoever arising from the use of the Information by any party.

5 SUPPORTING REFERENCES 5.1 Project Documentation

[S1] Kingsnorth Phase II CO2 Pipeline Project, Pipeline Design Basis, 80011-BOD-PL-001;

[S2] Submission D159, Description of the Offshore Installation facilities;

[S3] Submission D161, Offshore Installation Equipment to be used ;

[S4] Submission D168, Basis of Design for the Offshore Installation;

[S5] Submission D170, Access and accommodation on the platform;

[S6] Submission D171, Configuration of proposed offshore infrastructure ;

[S7] Submission D176, Offshore Installation construction methodology;

[S8] Basis of Design for Studies, Document No KCP-GNS-PCD-STU-0001

1.1 Scope of Document1.2 Definitions1.3 Abbreviations1.4 System of Units and Constants2.1 General3.1 Description of the Offshore Installation Facilities3.2 Design Life3.3 Deck Elevations3.4 Environmental Data (Preliminary HOLD 1)3.4.1 General3.4.2 Water Depths3.4.3 Current Profile3.4.4 Wave Data3.4.5 Marine Growth3.4.6 Soil Conditions3.4.7 Material3.4.8 Corrosion Allowance3.4.9 Corrosion Protection

4 MANDATORY REFERENCES4.1 Regulations and Statutes4.2 Design Codes

5 SUPPORTING REFERENCES5.1 Project Documentation