In one hour on Wednesday, 5,990 megawatts were imported, equal to the output of six nuclear reactors.
At minimum 12 of France's fifty eight reactors are shut for upkeep but the unions say creation has been minimize at four others.
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If it is not stopped speedily, this problem which is aimed at paralysing the country could have consequences for jobs by harmful the typical running of economic action”
The CGT union said striking personnel had decreased output at the Cattenom nuclear plant in north eastern France.
It also claimed that strikers in the South West had minimize power to 15 town halls controlled by Mr Sarkozy's UMP party.
France's other energy materials have already been severely disrupted by industrial action which has left all the country's twelve oil refineries blockaded for much more than a week and a quarter of its petrol stations empty. MPs have been instructed on Wednesday that 3,one hundred ninety had operate dry.
Striking gas workers have been also documented to have stopped gas from getting injected into the country's network from three out of twelve storage internet sites.
President Sarkozy issued a statement insisting that the disruption could not carry on: "If it is not stopped speedily, this condition which is aimed at paralysing the country could have consequences for jobs by harmful the normal operating of economic action."
He explained he would press ahead with unpopular plans to raise the retirement age from sixty to sixty two and the full state pension age from sixty five to 67.
The higher house of the French legislature is due to vote on elevating the retirement age on Thursday despite the fact that opponents are seeking to delay the bill ( via bbc.co.uk ).