The firm, which is 87 per cent state-owned and posted losses of 4.8 billion euros in 2014, says it hopes any redundancies would be voluntary.
The trio are 'unconnected' to other flights while sources say there may have been more than the 13 drone incidents cited at EDF nuclear plants.
The two men and one woman in their early twenties were detained with at least one drone near a nuclear power station, say officials.
Power firm EDF says the unmanned aircraft did not affect safety or the running of the plants but it has filed a complaint with police.
MPs vote to cut reliance on the energy source from more than 75 per cent to 50 per cent within a decade and cut carbon emissions.
Energy minister Ségolène Royal says if it costs too much to maintain ageing reactors then 'renewable energy' plants would be better.
Only three of 55 defendants turned up in court to face trial over the March 18th protest at Fessenheim power plant in east France.
The French government’s environment and energy minister Ségolène Royal has just unveiled her plans for what is known as “energy transition” - the move to a society which uses less energy and which switches from fossil and nuclear fuel to renewables. This long-awaited new law, which will be debated by the French Parliament in the autumn, has been touted as one of the flagship measures of President François Hollande's five-year term of office. But as Mediapart's environment correspondent Jade Lindgaard and Dan Israel report, the proposals, while regarded as a step in the right direction, have been widely described as timid and lacking in ambition.
Auditor's report is said to criticise lack of oversight by state-controlled nuclear group of multi-billion euro projects, plus high pay awards.
At Paris talks Japanese premier Shinzo Abe and President Hollande also confirm plans to strengthen cooperation on nuclear energy technology.
Officials say no restart date has yet been agreed for reactor at Fessenheim power station, which President Hollande promises to close by 2016.
France is hoping to conclude several aerospace and nuclear production deals during China president Xi Jinping's visit to Europe this month.
US Secretary of State fears that visit by French executives to Tehran will send 'wrong message' over easing of sanctions against Iran.
President Shimon Peres and prime minister Benjamin Netanyahu have urged France to maintain its firm stance over Tehran's nuclear programme.