EDF is hoping to secure a multibillion-euro windfall by extending the lifecycle of its nuclear power stations. This could prove crucial to maintaining its top grade credit rating as it invests billlions in acquisitions and plant renewal.

The energy group this week set out in detail the costs and expected gains from the planned investment in its 58 nuclear power stations that could enable it to run reactors for up to 60 years, against the current lifecycle of 40 years.