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Hot weather cuts French, German nuclear power output
Published in The Saudi Gazette on 25 - 07 - 2019

Scorching temperatures across Europe coupled with prolonged dry weather has reduced French nuclear power generation by around 5.2 gigawatts (GW) or 8 percent, French power grid operator RTE's data showed on Thursday.
Electricity output was curtailed at six reactors by 0840 GMT on Thursday, while two other reactors were offline, data showed. High water temperatures and sluggish flows limit the ability to use river water to cool reactors.
In Germany, PreussenElektra, the nuclear unit of utility E.ON, said it would take its Grohnde reactor offline on Friday due to high temperatures in the Weser river.
The second heat wave in successive months to hit western Europe is expected to peak on Thursday with record temperatures seen in several towns in France.
Utility EDF, which operates France's 58 nuclear reactors, said that generation at its Bugey, St-Alban and Tricastin nuclear power plants may be curbed until after July 26 because of the low flow rate and high temperatures of the Rhone.
Its two reactors at the 2,600 megawatt (MW) Golfech nuclear power plant in the south of France were offline due to high temperatures on the Garonne river.
EDF's use of water from rivers as a coolant is regulated by law to protect plant and animal life and it is obliged to cut output in hot weather when water temperatures rise, or when river levels and flow rates are low.
Atomic power from France's 58 reactors accounts for over 75 percent of its electricity needs. Available nuclear power supply was down 1.4 percentage points at 65.3 percent of total capacity compared with Wednesday.
A spokeswoman for grid operator RTE said that although electricity demand was expected to rise due to increased consumption for cooling, France had enough generation capacity to cover demand. Peak power demand could be above 59.7 GW reached the previous day.
Germany's PreussenElektra said in a statement it expected the closure of 1,430 MW Grohnde to last from midday on Friday July 26 to Sunday July 28, although plans could be revised if the weather changes.
PreussenElektra also operates the 1,485 MW Isar 2 reactor in Bavaria, which is due to finish a current routine maintenance standstill at the weekend, and the 1,440 MW Brokdorf plant on the river Elbe in the north.
Neither plants is currently expected to have to cut or halt operations because of the weather. — Reuters


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