The study comes a week before Energy Minister Segolene Royal presents the broad lines of a much-delayed framework energy law that aims to spell out how France will cut the share of atomic energy to 50 percent from the current 75 percent by 2025.
The rising cost of France's nuclear energy is a concern and the government should set up independent expert institutions to help it plan long-term energy investments, a parliamentary committee said in a report published on Tuesday.
According to the Greenpeace study, the investment needed to upgrade French utility EDF's 58 nuclear reactors to bring them close to the safety level of a new-generation EPR reactor would raise median production costs to 133 euros ($180) per megawatt-hour (MWh).
That estimate, based on an extension of the lifespan of current reactors by 10 years to 50 years and 4.4 billion euros worth of work per reactor, would make nuclear energy less competitive than onshore wind power around 2015, the study said.
Greenpeace also sees the cost of photovoltaic power falling to less than 134 euros/MWh around 2019 from more than 250 euros/MWh today, making it competitive with the renovated French nuclear plants by that time.
French Nuclear More Costly than Renewables by 2020: Greenpeace
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