London — The outage duration at the French 1.31-GW Nogent nuclear reactor-1 "could change according to ongoing diagnoses and potential subsequent repairs," operator EDF said Wednesday.
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In an update on its REMIT website, EDF also reaffirmed its previous expectation of a September 16 restart. The outage began last Thursday.
Earlier this week, EDF said the reactor was shut down to conduct a periodic test of control cluster maneuverability, located in the nuclear reactor and serving mainly to adjust the power of the reactor.
It observed the blocking of a control cluster during the tests.
Although this does not affect the safety of the installations, EDF said the unit needed to be shut down for "several weeks" to open the reactor vessel and determine the cause of the blockage.
A series of reactor outages have lowered French nuclear power production to around 36 GW during peak morning hours on Wednesday from 39 GW at around the same time last week, data from grid operator RTE showed.
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