The Rolls-Royce-Atkins proposal is for a low-head barrage, similar in structure to a conventional barrage but with a new type of turbine likely to draw upon technologies from both tidal stream and tidal range schemes.
The turbine design generates electricity on both the incoming and outgoing tides.
The turbine would operate at a lower depth and water level difference than conventional barrage turbines. By operating in this way, tides would be held back behind the barrage for less time, which should reduce the impact on the Severn estuary habitat.
The project will see Rolls-Royce and Atkins develop the turbine design to understand the costs and likely environmental impacts. |
