The Challenge:

The client required ‘make up water’ to be pumped directly from the River Trent to the Water Treatment Plant for the new power station 1km away. This water had to be supplied to compensate for losses by evaporation and leakage.

Kier, alongside EDF, identified the problem of how over 31,000m (19.4 miles) of buried services could be accommodated within the confines of the site. The new services had to avoid main access routes as well as existing services feeding the power station in operation adjacent to the new construction site. We had to design this to suit the site plan and avoid significant clashes.

The client also had a design system that did not use electronic data transfer. Consequently, no real means of clash detection and avoidance had been implemented.

The Solution:

For the main project civil elements we delivered the piling, foundations, underground ducts and drainage, roads, cooling water networks, structural steel buildings and cladding for three combined cycle units operating with natural gas. Kier used our ‘in house’ design capability for the project design and build elements including the pumping station, administration, gatehouse and workshop/warehouse buildings.

To ensure water could be pumped into the Water Treatment Plant, we designed and constructed a complete facility including Pumphouse, Inlet works and MEICA installation incorporating 4 pumps with variable speed drives to the client's performance criteria.

We engaged a 3D BIM clash detection specialist who identified over a hundred major clashes which were able to be resolved prior to the design being released to site for construction.This appointment along with our expertise enabled us to carry out and complete the works within the overall contract period and all 16 contract milestones.

The Impact:

The power station came into commercial operation in 2013, with an expected life of 25-30 years. The CCGT generates enough power to supply the needs of around 1.5 million homes and employs more than 40 skilled operators. CCGT power generation is the most energy efficient and clean method of fossil fuel generation releasing less than half the CO2 of conventional resources. The plant burns natural gas, which turns a gas turbine, and the waste heat is then used to turn a steam turbine.

Benefits to Client:

  • Innovation: £1.6 million saving against roof access walkways. A full level of steelwork involving over 2500 pieces was avoided with our solution to provide differing solutions for the access to areas of the roof requiring maintenance.

  • A positive culture was created by a ‘can do mentality’ against a backdrop of late design for client derived design elements and excellent client liaison and communication.

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