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eLibrary > PD IEC TS 62600-10:2021 - TC Tracked Changes. Marine energy. Wave, tidal and other water current converters - Assessment of mooring system for marine energy converters (MECs) >

PD IEC TS 62600-10:2021 - TC Tracked Changes. Marine energy. Wave, tidal and other water current converters - Assessment of mooring system for marine energy converters (MECs), 2024

30485010
A-30405948 [Go to Page]
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CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms
5 Principal elements [Go to Page]
5.1 General
5.2 Technology qualification
5.3 Safety and risk consideration
5.4 Safety levels
5.5 Design procedure
5.6 Inspection and maintenance requirements
6 Environmental and site conditions [Go to Page]
6.1 General
6.2 Primary environmental conditions
6.3 Secondary environmental conditions [Go to Page]
6.3.1 General
6.3.2 Marine growth
6.3.3 Seabed conditions
6.4 Site characteristics [Go to Page]
6.4.1 General
6.4.2 Environmentally sensitive and protected areas and marine animals
6.4.3 Nearshore impact
6.4.4 Vandalism and misuse
6.4.5 Marine traffic
6.4.6 Shallow water conditions
7 Design load cases [Go to Page]
7.1 General
7.2 Analysis procedure overview
Tables [Go to Page]
Table 1 – Potential nearshore impacts
7.3 Load categories [Go to Page]
7.3.1 General
Figure 1 – Recommended conceptual mooring analysis procedure [Go to Page]
7.3.2 Dynamic analysis of MEC response to environmental conditions
7.3.3 Low frequency loads
7.3.4 Wave frequency loads on mooring components
7.3.5 Wave frequency loads on MEC
Figures [Go to Page]
[Go to Page]
7.3.6 High frequency loading
7.4 Interaction with waves, currents, wind, water level and ice [Go to Page]
7.4.1 General
7.4.2 Resonant response
7.4.3 Design return period for short term deployments
7.5 Mooring line components [Go to Page]
7.5.1 General
7.5.2 Component strength
Table 2 – Combinations of uncorrelated extreme events [Go to Page]
7.5.3 Component fatigue life
7.5.4 Redundancy
7.5.5 Clearance
7.6 Umbilical considerations [Go to Page]
7.6.1 Umbilical response
7.6.2 Umbilical strength
7.6.3 Umbilical offset and clearance limits
7.7 Limit states [Go to Page]
7.7.1 General
7.7.2 Ultimate limit state (ULS)
7.7.3 Accidental limit state (ALS)
7.7.4 Serviceability limit state (SLS)
7.7.5 Fatigue limit state (FLS)
7.7.6 Consequence class safety factors
7.7.7 Mooring component failure
7.7.8 Anchor holding capacity
Table 3 – Consequence class associated safety factors for dynamic analysis techniques [Go to Page]
7.7.9 Load case modelling and simulation
Table 4 – Safety factors for holding capacity of drag anchors
Table 5 – Safety factors for holding capacity of anchor piles and suction piles
Table 6 – Safety factors for holding capacity of gravity and plate anchors [Go to Page]
7.7.10 Design conditions
Table 7 – Design load cases for WECs
Table 8 – Design load cases for CECs
8 In-service inspection, monitoring, testing, and maintenance [Go to Page]
8.1 General
8.2 Anchor proof loading
8.3 Component replacement [Go to Page]
8.3.1 General
8.3.2 Fibre rope component inspection and replacement
8.3.3 Inspection and predictive procedures
8.4 In air and splash zone mooring line sections
8.5 Submerged mooring line sections
8.6 Commissioning and decommissioning procedures
Annex A (informative) Moorings and anchoring systems [Go to Page]
A.1 Types of moorings and anchoring systems [Go to Page]
A.1.1 General
A.1.2 Mooring systems
Figure A.1 – Spread mooring configuration
Figure A.2 – Catenary anchor leg mooring configuration
Figure A.3 – Single anchor leg mooring configuration
A.2 Mooring line components [Go to Page]
A.2.1 General
A.2.2 Chain
Figure A.4 – Turret mooring configuration
Figure A.5 – Studless and studlink chain [Go to Page]
A.2.3 Wire rope
A.2.4 Synthetic rope
Figure A.6 – Typical wire rope construction
Table A.1 – Generalized comparison of mooring line material characteristics
Figure A.7 – Parallel yarn rope
Figure A.8 – Parallel core rope
Figure A.9 – Rope construction with 18+12+6+1 format
Figure A.10 – Three strand laid construction
Figure A.11 – Rope with 8 plait braid construction
Figure A.12 – Rope with braid on braid construction
Table A.2 – Properties for selection of synthetic fibre
Table A.3 – Generalized comparison of common rope relevant material properties [Go to Page]
A.2.5 Elastic tethers
A.2.6 Clump weights
A.2.7 Buoyancy aids
A.2.8 Connectors and accessories
A.3 Anchors [Go to Page]
A.3.1 General
A.3.2 Drag embedment anchor
Figure A.13 – Types of connectors [Go to Page]
A.3.3 Pile anchor
A.3.4 Suction anchor
Figure A.14 – Drag embedment anchor
Figure A.15 – Pile anchor [Go to Page]
A.3.5 Gravity installed anchor
Figure A.16 – Suction anchor [Go to Page]
A.3.6 Gravity anchor
Figure A.17 – Gravity installed torpedo anchor
Figure A.18 – Gravity installed anchor with rotating load arm [Go to Page]
A.3.7 Plate anchor
A.3.8 Screw and rock anchors
Figure A.19 – Gravity anchor
Figure A.20 – Suction or pile driven plate anchor [Go to Page]
A.3.9 Type selection
A.3.10 Holding capacity
Figure A.21 – Screw anchor
Figure A.22 – Rock anchor [Go to Page]
A.3.11 Sediment and rock conditions
A.3.12 Fluke setting
A.3.13 Installation
A.3.14 Proof loading
A.3.15 Directional anchor loading
A.3.16 Failure mode
A.3.17 Environmental loading
A.3.18 Failure point
Annex B (normative) Safety and risk considerations [Go to Page]
B.1 General
B.2 Risk [Go to Page]
B.2.1 General
B.2.2 Definition
B.2.3 Consequence types
B.3 Risk assessment methodology [Go to Page]
B.3.1 General
B.3.2 Methodology flowchart
Figure B.1 – General risk methodology flowchart
B.4 Consequence considerations for mooring failure
B.5 Consequence classification [Go to Page]
B.5.1 General
Table B.1 – Consequence categories [Go to Page]
B.5.2 Consequence impact considerations
B.5.3 Risk mitigation considerations
B.5.4 Risk acceptance
Annex C (informative) Numerical modelling considerations [Go to Page]
C.1 General
C.2 Mooring, umbilical, and dynamic cable models [Go to Page]
C.2.1 General
C.2.2 Static and catenary models
C.2.3 Discrete models
C.2.4 Floating unit numerical models
Bibliography [Go to Page]

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