fellside chp

At px Group, we have operated and maintained the Fellside Combined Heat and Power (CHP) plant at Sellafield in Cumbria since 2004. We also operate the 0.5 km high-hazard pipeline which is the main fuel supply to the site. The site is an upper tier COMAH installation forming part of the Sellafield COMAH enclave.

Built in 1993, the plant provides critical process steam to the Sellafield nuclear reprocessing facility and exports electricity to Sellafield and the National Grid.

Originally, three GE Frame 6581B gas turbines provided power, operating on natural gas with back-up distillate fuel. Since then, two turbines have been retired and additional dual fuel steam raising boilers were commissioned, with a further boiler park facility currently under construction.

As part of the O&M contract, we retained the 60 staff based on site and successfully transferred them to px Group, helping to ensure that skills and site knowledge were maintained, and the site continued to run as smoothly and safely as possible.

Since 2004 we have managed a series of major outages designed to improve asset integrity. We’ve developed several tools to monitor plant performance, enabling the site team to analyse operating regimes, adapt operation to reduce fuel consumption, and prioritise plant maintenance.

Today, we continue to work in close partnership with Sellafield Ltd to update and improve the plant, and our engineering services team works closely with O&M to ensure that solutions are focused on optimising the plant’s performance and minimising fuel consumption.


  • Fellside CHP provides critical process steam to the Sellafield nuclear reprocessing facility and electricity to Sellafield and the National Grid
  • px Group is committed to continuous updating and improvement at the plant
  • Over the years, we have managed several major outages to improve asset integrity
  • The plant has won 12 consecutive RoSPA Gold Awards for safety.