Draft Overview of HPC Construction - EDF Hinkley Point

5. CONSTRUCTION LOGISTICS5.1 Introduction5.1.1 This section outlines the logistics for people and materials within the Hinkley Point CDevelopment Site.5.2 Freight and Materialsa) Materials Quantities5.2.1 The construction works will require around 5.1 million tonnes of material to bebrought onto the site, of which at least 2.3 million tonnes is expected to betransported by sea via the temporary jetty. The remaining 2.8 million tonnes will betransported by road (further details are provided within the Draft FreightManagement Strategy).b) Materials Delivery and Storage5.2.2 Material arriving via the temporary jetty will be mainly sand, aggregate and cementbut the jetty is also designed to handle other more general construction materials.The sand and aggregate will be offloaded into a hopper at the jetty head, from whicha conveyor system will transport it to stockpiles in the north-west corner of the site.The cement will be pumped ashore, using a pipeline along the jetty, into silos. Thesematerials will be transported by truck or conveyor to the concrete batching plantswhere the concrete is mixed and pumped or trucked to the point of use.5.2.3 Other bulk materials arriving at the jetty will be offloaded by mobile crane andtransported by truck to the appropriate storage areas.5.2.4 Most materials arriving by road will enter the site via the south entrance wheresecurity checks will be carried out before the materials are trucked to the appropriatestorage areas.5.2.5 Materials will be stored in the contractors’ compounds until required for installation.5.2.6 Abnormal Indivisible Loads (AILs), which have been brought by sea to CombwichWharf, will be transported to site by road and will enter the site via the northernroundabout. These loads will be taken direct to the point of installation wherespecialist lifting gear will be used to position the item within the power station.c) Pre-fabrication5.2.7 Materials delivered to site may be pre-fabricated into larger assemblies beforeinstallation. Examples of likely pre-fabrication are the reactor building steel liner andreinforcing bars for the reactor building structures.5.2.8 Pre-fabrication of the reactor building steel liner would take place in a largetemporary building where welding can be carried out in a controlled environment.The pre-fabricated sections would be transported using large trailers along a heavyload route to the point where they can be lifted into place with a large jib crane.DRAFT | Overview of HPC Construction | February 2011 33