Zaporizhzhia nuclear plant loses external power again and runs on diesel generators — the IAEA says the cause is not yet known
The Russian-controlled Zaporizhzhia nuclear plant in southeastern Ukraine lost its external electricity supply on Sunday 8 November 2026 after its last operating external line, the 330 kV Ferosplavna-1, was disconnected. Backup diesel generators are supplying the equipment needed to keep the plant's six shut-down reactors and fuel pools safe, and the plant's Russian-installed management says radiation levels are normal. The UN's nuclear watchdog, the IAEA, said the cause and location of the disconnection are not yet known and that the plant has fuel to run a limited number of emergency generators for about two weeks. Ukraine's state operator Energoatom said the line went offline at 02:36 and called it the 16th complete loss of external power at the plant in 2026.
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Key points
- The plant lost external power on Sunday when the Ferosplavna line disconnected; diesel generators are supplying its safety systems.
- The IAEA says the cause and location of the disconnection are not yet known, and generator fuel should last about two weeks.
- The plant management says radiation levels are normal; Energoatom calls this the 16th complete blackout of 2026.
- The plant produces no electricity — all six reactors are in cold shutdown — but it needs outside power to keep fuel cool.
What happened
Zaporizhzhia, Europe's largest nuclear plant, was seized by Russian forces in the first weeks of the 2022 invasion and has been in cold shutdown since. It depends on external lines for the power its cooling and safety systems need; the main Dniprovska line has been unavailable since before 23 October, leaving Ferosplavna as the last link. In September an IAEA-brokered local ceasefire allowed repairs after an outage that had lasted since 20 August.
Both sides, in their own words
Both sides heard. Neither believed for free. Publishing a side's version is not endorsing it — the claim checks below are where verdicts live.
Side A · The plant's Russian-installed management
- The Ferosplavna line was shut down by automatic protection after damage, and backup diesel generators are supplying the equipment required for the station's safe operation.
- Staff are monitoring all operational parameters, all necessary measures to keep the power units safe are being taken in full, and radiation levels on the site and in the surveillance zone are normal.
Side B · Energoatom, Ukraine's state operator
- The line went offline at 02:36 on 8 November, an automatic reconnection attempt failed, and this is the 16th complete loss of external power at the plant in 2026.
- Running in blackout mode creates a direct risk to fuel-cooling and life-support systems if the generators fail or their fuel runs out, and safety can be restored only when the plant returns to Ukrainian control.
Independently verified
The Zaporizhzhia plant lost its external power supply on Sunday 8 November 2026 after the Ferosplavna power line was disconnected by protective systems because of damage, its Russian-installed management said in a statement on the MAX messenger app, reported by Reuters. Backup diesel generators are supplying the equipment required for safe operation, staff are monitoring all parameters, and radiation levels on the site and in the surveillance zone are normal, the statement added. The IAEA said the plant lost its off-site supply after the Ferosplavna line disconnected, that 'the cause and location of the latest disconnection are not yet known', and that the plant currently has sufficient fuel reserves to operate a limited number of emergency diesel generators for about two weeks. The agency said on 23 October that the main Dniprovska line remained unavailable, so Ferosplavna was the last operating external link. Energoatom, Ukraine's state nuclear operator, said the last operating 330 kV line, Ferrosplavna-1, went offline at 02:36 on 8 November, that an attempt to reconnect it automatically was unsuccessful, and that this is the 16th time the plant has completely lost external power in 2026. It said operating in blackout mode creates a direct risk of failure of the nuclear fuel cooling systems if the diesel generators fail or their fuel runs out.Not yet verified
Nothing outstanding.Claim by claim
Why this label: The management's own statement, reported in full by Reuters; the loss of supply and the move to generators are also stated by the IAEA in the Reuters report.
On the ladder: a claim earns Verified from primary evidence, or from two independent sources that do not copy each other.
Why this label: The IAEA's own X post, quoted in Reuters' report; the Dniprovska position is the agency's 23 October statement as carried in the same report.
On the ladder: a claim earns Verified from primary evidence, or from two independent sources that do not copy each other.
Why this label: Energoatom's own statement, reported in the same terms by Kyiv Post and by AgroReview's report of the statement; the count and the time are the operator's, carried as its statement.
On the ladder: a claim earns Verified from primary evidence, or from two independent sources that do not copy each other.
What we know / what we don't know yet
What we know
- External power was lost on Sunday, generators are running, and the IAEA puts generator fuel at about two weeks.
- Radiation levels are normal, on the plant management's statement.
What we don't know yet
- What damaged or disconnected the Ferosplavna line — the IAEA says the cause and location are not yet known, and no attribution is established.
- When external power will be restored.
Why it matters
A shut-down nuclear plant is not a safe-by-default one: its fuel still needs powered cooling, and every loss of outside power starts a clock measured in generator fuel. Sixteen complete blackouts in one year is the measure of how routine that clock has become.
Background
Show the background timeline (4)
Russian forces seize the plant in the first weeks of the invasion; its six reactors are placed in cold shutdown and have stayed there.
The plant is without external power from 20 August until an IAEA-brokered local ceasefire allows repairs.
The IAEA says the main Dniprovska line remains unavailable, leaving Ferosplavna as the last external link.
The Ferosplavna-1 line goes offline; the plant moves to diesel generators.
Update history
No silent edits. Every change is written here, with its time.
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Published in Checking state — checking continues, and claims are labelled as reporting develops. Basis: Reuters' report of the plant management's statement and the IAEA's post, with Energoatom's statement for the timing and the blackout count.