* Labor unions call for industry-wide strike
* Would be sixth strike by EDF workers this year
Workers at France's EDF will strike for 24 hours starting Monday at 9:00 pm local time (2000 GMT), the company said in a note posted on the website of French grid operator RTE Friday morning.
The strike will end at 9:00 pm on Tuesday, EDF said, without giving any details on how much capacity could be affected.
The last strike began on Monday, March 13, at 4:00 pm, with it being initially announced for 9:00 pm and it ended Tuesday at 9:00 pm.
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The event had little if any impact on prices, as strong solar output and high temperatures helped offset the impact of a drop in nuclear, hydro and fossil fuel capacity.
On Tuesday, 12 nuclear reactors were seen operating at reduced capacity, all citing the strike as a reason. Combined nuclear capacity slashed at the 12 reactors amounted to 4.355 GW Tuesday, according to data from French grid operator RTE.
With one coal plant and two fuel oil units taken down because of the strike as well, the total capacity cuts during Tuesday's industrial action amounted to 8.12 GW.
Hydro capacity was also impacted by the strike, with the latest update from the grid operator showing a drop of 540 MW in hydro availability.
All 12 reactors, hydro and other units were seen operating normally again on Wednesday.
REFLECTS SECTOR-WIDE STRIKE CALLED FOR TUESDAY
The notice of the latest EDF action comes as labor unions representing professionals in the energy industry
called on Thursday for a national action day on Tuesday. The call to strike comes against the backdrop of a proposal to freeze the national base salary this year.
"No to the freezing of the national base salary, a fundamental element of the social regulation for all people in the electricity industry! On March 21, 2017, the struggle continues. The FNME CGT calls on all the staff to strike...This must be extended to all categories of staff," France's main energy trade union, FNME-CGT said in a statement on its website Thursday.
The statement said the unions were asking for the reopening of negotiations on the national basic salary, and an end to job cuts.
EDF workers have joined several recent calls for national action days organized by FNME-CGT and other unions, with the strike next week the sixth for EDF workers this year.
--Ana-Maria Tolbaru, firstname.lastname@example.org
--Edited by Maurice Geller, email@example.com