IEC TS 62600-2:2016

IEC TS 62600-2 ®
Edition 1.0 2016-08
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –
Part 2: Design requirements for marine energy systems

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IEC TS 62600-2 ®
Edition 1.0 2016-08
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –

Part 2: Design requirements for marine energy systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.140 ISBN 978-2-8322-3580-5

– 2 – IEC TS 62600-2:2016 © IEC 2016

CONTENTS
FOREWORD . 8

INTRODUCTION . 10

1 Scope . 11

1.1 General . 11

1.2 Applications . 11

2 Normative references. 12

3 Terms and definitions . 13

4 Symbols and abbreviated terms . 13
5 General considerations . 15
5.1 General . 15
5.2 Regulations . 15
5.3 Suitability and/or relevance of standards . 15
5.4 Quality assurance and quality control . 15
5.5 Safety levels . 16
5.6 Design principles – structure and foundations . 17
5.7 Load definition and load combinations . 17
5.8 Other considerations . 18
5.8.1 Stability and watertight integrity . 18
5.8.2 Electrical, mechanical, instrumentation and control systems . 18
5.8.3 Reliability issues . 18
5.8.4 Corrosion protection . 18
5.8.5 Design for operation, inspection, maintenance and decommissioning . 18
5.9 Operational and structural resonance . 18
5.10 Basis of design . 19
6 External conditions . 19
6.1 General . 19
6.2 Waves . 19
6.2.1 Normal sea state (NSS). 19
6.2.2 Normal wave height (NWH) . 19
6.2.3 Extreme sea state (ESS) . 20
6.2.4 Extreme wave height (EWH) . 20
6.2.5 Breaking waves . 21

6.2.6 Wave run-up . 21
6.3 Sea currents . 21
6.3.1 General . 21
6.3.2 Sub-surface currents . 21
6.3.3 Wind-generated near-surface currents . 22
6.3.4 Tidal currents . 22
6.3.5 Breaking wave-induced surf currents . 22
6.3.6 Normal current model (NCM) . 23
6.3.7 Extreme current model (ECM) . 23
6.3.8 Normal turbulence model (NTM) . 23
6.3.9 Extreme turbulence model (ETM) . 23
6.4 Wind conditions . 24
6.5 Water level. 24
6.5.1 General . 24

6.5.2 Normal water level range (NWLR) . 25

6.5.3 Extreme water level range (EWLR) . 25

6.6 Sea and river ice . 25

6.7 Earthquakes . 26

6.8 Marine growth . 26

6.9 Seabed movement and scour . 26

6.10 Ship collisions . 26

6.11 Other environmental conditions . 26

7 Loads and load effects . 26

7.1 General . 26
7.2 Loads . 26
7.3 Design situations and load cases . 28
7.3.1 General . 28
7.3.2 Interaction with waves, currents, wind, water level and ice . 28
7.3.3 Design categories . 29
7.3.4 Limit states . 29
7.3.5 Partial safety factors . 30
7.3.6 Simulation requirements . 31
7.3.7 Design conditions . 32
8 Materials . 40
8.1 General . 40
8.2 Material selection criteria . 41
8.3 Environmental considerations . 42
8.4 Structural materials . 42
8.4.1 General . 42
8.4.2 Metals . 42
8.4.3 Concrete . 43
8.4.4 Composites . 43
8.5 Compatibility of materials . 45
9 Design of primary structures for wave and tidal/current energy converters . 45
9.1 General . 45
9.2 Design of steel structures . 45
9.2.1 General . 45
9.2.2 Load and resistance factor design (LRFD) . 46
9.2.3 Ultimate limit state . 46

9.2.4 Fatigue limit state . 47
9.2.5 Serviceability limit state . 47
9.3 Design of concrete structures . 47
9.3.1 General . 47
9.3.2 Limit states . 47
9.3.3 Bending moment and axial force . 48
9.3.4 Slender structural members . 48
9.3.5 Transverse shear . 48
9.3.6 Torsional moments . 48
9.3.7 Bond strength and anchorage failure . 48
9.3.8 Fatigue limit state . 48
9.3.9 Serviceability limit state .
...