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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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