Table 5.22 Potential Safety Zones during Construction, Operation and Decommissioning Type of Safety zone
Area Covered Construction 1 Commissioning 2 Operations 2 Major Maintenance 1 Decommissioning
Up to 500m around each foundation or renewable energy installation whilst under construction
Up to 50m around each renewable energy installation where construction has finished but some work is ongoing, e.g. wind turbine incomplete or in the process of being tested before commissioning.
50m around each renewable energy installation during operation.
Up to 500m when major maintenance is in progress (use of jack-up vessel or similar).
Up to 500m at the end of the working life of a renewable energy installation when it is being removed from site
1 The Construction, Major Maintenance and Decommissioning safety zones are required to ensure a safe distance is maintained from vessels engaged in high risk activities such as jacking operations and heavy lifts. 2 The Commissioning and Operations safety zones are required to ensure small vessels are not adversely affected by propeller or thruster wash from vessels used for transfer whilst also ensuring no additional risk is created for personnel during access and egress. This zone also reduces risk of injury to third parties from items dropped from aloft.
235. Whilst no formal application of a safety zone around cable laying operations is possible under Section 95 of the Energy Act 2004, it is the intention of EATL to propose temporary Advisory Exclusion Zones of up to 500maround EATL vessels installing export cables, interconnecting cables and inter-array cables in the interests of the safety of all users of the sea, and to provide clearance of 500m from laid cables until burial is confirmed in case of interaction with anchors or fishing gear.
236. The application of safety zones under Section 95 of the Energy Act 2004 and the provision of temporary Advisory Exclusion Zones around cable installation and unburied cables would be finalised in discussion with the Maritime and Coastguard Agency.
5.4.11.20.1 Vessel Profiles 237. This section provides an overview of the types of vessel that would be used in the construction, operation and decommissioning of the proposed East Anglia THREE project.
238. Jack-up vessels: Jack-up vessels are considered an option for installation of jacket foundations and wind turbines along with floating vessels.
239. An envelope of dimensions for jack-up vessels likely to be considered for East Anglia THREE is illustrated in Table 5.23 below. Floating vessels are under consideration for
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 5 Description of the Development Page 54
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114