Nuclearelectrica confirmed that Cernavodă Unit 1 reconnected to Romania’s national electricity system on the afternoon of 6 November. Its stock-exchange filing said startup manoeuvres followed the applicable procedures without affecting nuclear safety, staff or the public. [5]
ContextThe completed resynchronisation supersedes the forecast issued on 4 November. That earlier statement said Unit 1’s cooling-water demand would reduce the intake-basin level and that Unit 2 required a sustained rise in the Danube. The latest filing confirms Unit 1’s return, rather than the recovery of both reactors. [5][4]
Replaced the conditional 6 November target with the operator’s confirmation of completed Unit 1 grid resynchronisation.
Updated ·
Added the operator’s 4 November startup decision and conditional 6 November grid-reconnection target, superseding the earlier shutdown assessment.
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Cernavodă begins Unit 1 startup, targets 6 November reconnection
The operator began startup procedures on 4 November. Unit 2 still requires a sustained rise in Danube levels.
Nuclearelectrica began startup procedures for Cernavodă Unit 1 on 4 November after the minimum conditions were met. The operator expects to reconnect the unit to Romania’s grid on Friday, 6 November; it has not yet confirmed resynchronisation.
The company said Unit 1’s cooling-water demand will lower the intake-basin level. Restarting Unit 2 therefore requires a sustained increase in the Danube. Startup follows strict nuclear-safety procedures, and the new timetable concerns Unit 1 rather than simultaneous recovery of both reactors.
Replaces the expired 21 October estimate with the operator’s 29 October hydrological assessment.
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Cernavodă operator says water rise still insufficient for restart
Recovered 29 October update: both reactors remained safely shut down, with no firm reconnection timetable.
Nuclearelectrica said on 29 October that Cernavodă’s two reactors remained safely shut down despite a local rise of about 10 centimetres in its intake basin. Forecasts did not yet justify reconnecting either unit, the operator said.
The required water level must persist for several days and show an upward trend. This recovered statement supersedes the earlier restart estimate below; it does not establish a restart date or confirm the units’ status after 29 October.
Romania’s state-owned Nuclearelectrica said on 11 October that both units at the Cernavodă nuclear plant remained in a safe shutdown state. It said the situation posed no nuclear-safety risk and that the plant’s cooling and safety systems remained available.
Energy Ministry state secretary Cristian Bușoi said hydrological conditions were unlikely to allow either reactor to restart before 21 October. SeeNews reported that the Danube stood only a few centimetres above an emergency administrative threshold and that the ministry was assessing the possible price impact with electricity suppliers.
ContextThe reactors have been offline since August because drought reduced the Danube flow needed for cooling. The new date is an operational estimate, not a confirmed restart timetable; Romania may continue relying more heavily on other generation and imports, with potential implications for neighbouring Moldova’s supply.
Romania extends Cernavodă shutdown as Danube stays low
Both reactors remain safely offline, with officials saying hydrological conditions are unlikely to permit a restart before 21 October.
Romania’s state-owned Nuclearelectrica said on 11 October that both units at the Cernavodă nuclear plant remained in a safe shutdown state. It said the situation posed no nuclear-safety risk and that the plant’s cooling and safety systems remained available.
Energy Ministry state secretary Cristian Bușoi said hydrological conditions were unlikely to allow either reactor to restart before 21 October. SeeNews reported that the Danube stood only a few centimetres above an emergency administrative threshold and that the ministry was assessing the possible price impact with electricity suppliers.
ContextThe reactors have been offline since August because drought reduced the Danube flow needed for cooling. The new date is an operational estimate, not a confirmed restart timetable; Romania may continue relying more heavily on other generation and imports, with potential implications for neighbouring Moldova’s supply.
The planned 400 kV Strășeni-Gutinaș interconnector is backed by a proposed $130 million US investment and is intended to strengthen Moldova's access to the European grid.
