Draft Overview of HPC Construction - EDF Hinkley Point

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v. Sewage4.3.44 A new sewage collection network will be installed for the construction site and thiswill take the sewage to a number of modular sewage treatment plants and the treatedwater will be discharged into the site drainage systems. A new permanent sewagetreatment plant will be built as part of the permanent power station and this willservice the permanent works, discharging treated effluent into the station dischargeto the Bridgwater Bay.j) Site Offices and Welfare Facilities4.3.45 The site offices, canteens and other infrastructure will be subject to continuouschange as the workforce numbers change, the nature of the work evolves from civilthrough mechanical and electrical to commissioning and operation, and ascontractors arrive and depart from the site.4.3.46 EDF Energy will exercise overall control of the temporary infrastructure within theconstruction areas and will allocate temporary compounds for contractors, withinwhich they will have a degree of flexibility in how they occupy the space.4.3.47 EDF Energy will provide office space and welfare facilities for its own staff and forcontractors who do not require their own site compounds. EDF Energy will alsoprovide canteens, first aid and welfare facilities in the main construction area to thenorth of the Hinkley Point C Development Site for use by all workers, in order toreduce walking time to and from breaks etc. It is currently envisaged that there willbe two canteens and multiple welfare and first aid buildings within the mainconstruction area. The welfare and first aid facilities will be relocated as necessaryas the work proceeds.4.3.48 In addition to the EDF Energy facilities, each construction contractor will be requiredto provide office, changing and welfare facilities for their own staff within theirallocated compounds. The contractors will also incorporate pre-fabrication facilities,workshops and storage facilities, as necessary for their work, within their compounds.4.3.49 A large pre-fabrication building is planned for construction of the reactor buildingsteel liners. This is shown to the west of unit 2 on the construction phasing plans(see Figures 4.1 - 4.4), but the exact size and location will be the subject of furtherdiscussions with the main civil works contractor when they are appointed.4.3.50 A dual purpose building is located in the south-west corner of the permanent powerstation site. This building will be used by the nuclear steam supply system contractoras a warehouse and fabrication facility during the construction works and will thenbecome the outage workshop and store for the ongoing station operation.k) Mechanical and Electrical Works4.3.51 The mechanical and electrical plant installation phase will commence when the civilstructures are sufficiently advanced to enable access. This will be in approximately2014. There will be a limited number of mechanical and electrical contractors andthey will install equipment manufactured by others, as well as equipment suppliedunder their own contracts.30 DRAFT | Overview of HPC Construction | February 2011
4.3.52 The majority of the mechanical and electrical activity will take place within the powerstation buildings in the north of the site. However, some of the contractors’compounds will be located in the southern part of the site. A significant proportion ofthe piping and ventilation ductwork will be pre-fabricated before installation, either atthe manufacturers’ works or on-site.4.3.53 Most of the mechanical and electrical equipment will be delivered by road, althoughsome items, such as small bore pipework, cable, and items manufactured abroad,may be suitable for sea delivery. Suppliers will be encouraged to use sea transportwhere practicable.4.3.54 Approximately 180 mechanical and electrical plant items, e.g. the reactor pressurevessels, will be very large and/or heavy and will require special transport to site.These are classified as Abnormal Indivisible Loads (AILs) and will be shipped toCombwich Wharf by sea and then taken to site by road using special trailers. Theseitems will be taken straight to their final location and installed using special lifting andhandling equipment.DRAFT | Overview of HPC Construction | February 2011 31
Page 1 and 2: Draft Overview of HPCConstructionFe
Page 3 and 4: CONTENTS1. INTRODUCTION ...........
Page 5 and 6: 1. INTRODUCTION1.1.1 NNB Generation
Page 7 and 8: 2. STRATEGIC CONSTRUCTIONPROGRAMME2
Page 9 and 10: 2.2.5 The construction schedule for
Page 11 and 12: 3. PRELIMINARY WORKS3.1 Introductio
Page 13 and 14: Dewatering of the working areas aro
Page 15 and 16: 4. CONSTRUCTION AT HINKLEY POINT C4
Page 17 and 18: Land UseArea (ha)Nuclear steam supp
Page 19 and 20: The installation of mechanical and
Page 21 and 22: 4.1.30 Abnormal Indivisible Loads (
Page 23 and 24: infrastructure. In these cases, the
Page 25 and 26: 4.3.9 The intake and outfall struct
Page 27 and 28: 4.3.21 Two all weather five a side
Page 29: iii. Water Supplies4.3.37 A new wat
Page 33 and 34: 5. CONSTRUCTION LOGISTICS5.1 Introd
Page 35 and 36: c) Working Hours5.3.4 The working p

Draft Overview of HPC Construction - EDF Hinkley Point

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