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PD IEC/TS 62600-10:2015 Marine energy. Wave, tidal and other water current converters - Assessment of mooring system for marine energy converters (MECs), 2015
- 30323327-VOR.pdf [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Abbreviated terms
- 5 Principal element [Go to Page]
- 5.1 General
- 5.2 Mooring and anchor systems
- 5.3 Design considerations
- 5.4 Safety and risk consideration
- 5.5 Analysis procedure
- 5.6 Inspection and maintenance requirements
- 6 Types of moorings and anchoring systems [Go to Page]
- 6.1 General
- 6.2 Mooring systems [Go to Page]
- 6.2.1 General
- 6.2.2 Spread moorings (catenary, taut-line and semi-taut-line)
- 6.2.3 Single point moorings (SPM)
- 6.3 Mooring line components [Go to Page]
- 6.3.1 General
- 6.3.2 Chain
- 6.3.3 Wire rope
- 6.3.4 Synthetic rope
- 6.3.5 Clump weights
- 6.3.6 Buoyancy aids
- 6.3.7 Connectors and accessories
- 6.4 Anchors types [Go to Page]
- 6.4.1 General
- 6.4.2 Drag embedment anchor
- 6.4.3 Pile anchor
- 6.4.4 Suction anchor
- 6.4.5 Gravity installed anchor
- 6.4.6 Gravity anchor
- 6.4.7 Plate anchor
- 6.4.8 Screw anchor
- 7 Design consideration [Go to Page]
- 7.1 General
- 7.2 Limit states [Go to Page]
- 7.2.1 Ultimate limit state (ULS)
- 7.2.2 Accidental limit state (ALS)
- 7.2.3 Serviceability limit state (SLS)
- 7.2.4 Fatigue limit state (FLS)
- 7.3 External conditions [Go to Page]
- 7.3.1 General
- 7.3.2 Metocean conditions
- 7.3.3 Marine growth
- 7.3.4 Marine life
- 7.3.5 Environmentally sensitive and protected areas and marine animals
- 7.3.6 Nearshore impact
- 7.3.7 Vandalism and misuse
- 7.3.8 Marine traffic
- 7.4 Assorted loading [Go to Page]
- 7.4.1 General
- 7.4.2 Low frequency loads
- 7.4.3 Wave frequency loads on mooring components
- 7.4.4 Wave frequency loads on MEC
- 7.4.5 High frequency loading
- 7.5 Mooring line components [Go to Page]
- 7.5.1 Component strength
- 7.5.2 Component fatigue life
- 7.5.3 Redundancy
- 7.5.4 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 Anchors [Go to Page]
- 7.7.1 Type selection
- 7.7.2 Holding capacity
- 7.7.3 Sediment and rock conditions
- 7.7.4 Fluke setting
- 7.7.5 Installation
- 7.7.6 Proof loading
- 7.7.7 Directional anchor loading
- 7.7.8 Failure mode
- 7.7.9 Environmental loading
- 8 Safety and risk considerations [Go to Page]
- 8.1 Overview
- 8.2 Risk [Go to Page]
- 8.2.1 General
- 8.2.2 Definition
- 8.2.3 Consequence types
- 8.2.4 General risk mitigation
- 8.2.5 ALARP principle
- 8.3 Risk assessment methodology [Go to Page]
- 8.3.1 General
- 8.3.2 Methodology flowchart
- 8.3.3 Basic considerations
- 8.3.4 Probability assessment
- 8.3.5 Consequence classification assessment
- 8.4 Consequence considerations for mooring failure
- 8.5 Consequence classification [Go to Page]
- 8.5.1 General
- 8.5.2 Consequence impact considerations
- 8.5.3 Waterway navigation impacts
- 8.5.4 Environmentally sensitive and protected sites
- 8.5.5 Archaeological sites
- 8.6 Risk mitigation considerations [Go to Page]
- 8.6.1 Mitigation overview
- 8.6.2 Probability reduction
- 8.6.3 Consequence reduction
- 8.7 Risk acceptance [Go to Page]
- 8.7.1 Acceptance overview
- 8.7.2 Documentation
- 9 Analysis procedure [Go to Page]
- 9.1 General
- 9.2 Basic considerations
- 9.3 Analysis procedure overview
- 9.4 Modelling consideration [Go to Page]
- 9.4.1 General
- 9.4.2 Mooring and umbilical models
- 9.4.3 Floating unit numerical models
- 9.4.4 Coupled and uncoupled analysis
- 9.5 Analysis procedure considerations [Go to Page]
- 9.5.1 Metocean directionality
- 9.5.2 Resonant response
- 9.5.3 Dynamic mooring analysis
- 9.5.4 Design situations of ULS
- 9.5.5 Design situations of ALS
- 9.5.6 Design situations of FLS
- 9.5.7 Design situations of SLS
- 9.6 Mooring design criteria [Go to Page]
- 9.6.1 Design return period
- 9.6.2 Consequence class design factor
- 9.6.3 Mooring line component failure
- 9.6.4 Anchor holding capacity
- 10 In-service inspection, monitoring, testing, and maintenance [Go to Page]
- 10.1 General
- 10.2 Mooring system proof loading
- 10.3 Component replacement
- 10.4 In air and splash zone mooring line sections
- 10.5 Submerged mooring line sections
- 10.6 Commissioning and decommissioning procedures
- Annex A (informative)Sample mooring design [Go to Page]
- A.1 General
- A.2 Problem layout
- A.3 Consequence class identification
- A.4 Mooring design process
- Bibliography
- Figures [Go to Page]
- Figure 1 – Spread mooring configuration
- Figure 2 – Catenary anchor leg mooring configuration
- Figure 3 – Single anchor leg mooring configuration
- Figure 4 – Turret mooring configuration
- Figure 5 – Studless and studlink chain
- Figure 6 – Typical wire rope construction
- Figure 7 – Types of connectors
- Figure 8 – HHP drag embedment anchor
- Figure 9 – Pile anchor
- Figure 10 – Suction anchor
- Figure 11 – Gravity installed anchor
- Figure 12 – Gravity anchor
- Figure 13 – Plate anchor
- Figure 14 – Screw anchor
- Figure 15 – General risk methodology flowchart
- Figure 16 – Conceptual mooring analysis procedure
- Figure A.1 – Potential tidal current MEC installation locations A, B; artificial reef C; fish farm D; marine traffic corridor E
- Figure A.2 – Mooring line component minimum ASF for each return periodenvironment 5, 10, 20, 50, and 100 plotted to determine mooring ULS return period
- Figure A.3 – Anchor minimum ASF for each return periodenvironment 5, 10, 20, 50, and 100 plotted to determine anchor ULS return period
- Tables [Go to Page]
- Table 1 – Potential nearshore impacts
- Table 2 – Consequence categories
- Table 3 – Consequence class
- Table 4 – Consequence class associated design factors
- Table 5 – Safety factors for ULS and ALS conditions
- Table 6 – Safety factors for holding capacity of drag anchors factors
- Table 7 – Safety factors for holding capacity of anchor piles and suction piles
- Table 8 – Safety factors for holding capacity of gravity and plate anchors
- Table A.1 – Consequence classification matrix: location A
- Table A.2 – Consequence classification matrix: location B [Go to Page]
