Appendix 1: Operations and Maintenance List Parameter
Potential Maintenance Activity
Wind turbines
Annual wind turbine maintenance
Wind turbine troubleshooting
Wind turbine repair
Worst Case Assessed in the Environmental Statement
For topside-related replacement, refurbishment and repair activities, the following worst case has been assessed.
(i) Estimated worst case six work boats per day to and from the East Anglia ONE site for regular maintenance (supply and accommodation boats).
Blade inspection
(ii) Estimated worst case of two additional irregular maintenance boats (jack-up barge) per day to one of the 325 jacket foundations. Two irregular maintenance vessels - assume one jack-up movement to remove a heavy lift object, and one jack-up movement to replace the heavy lift object.
Blade repair Blade replacement
Transition piece repair
Transition piece maintenance
Transformer replacement
Gearbox replacement
Generator Outline Operations and Maintenance Monitoring Plan Offshore
Further Works/ Annex 1 Surveys /Action Needed
No further action required
No further action required
No further action required
No further action required
No further action required
No further action required
No further action required
No further action required
No further action required
No further action required
No further action Page 9
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