IAEA says Zaporizhzhia power line repaired but substation damage delays reconnection

What happened

The International Atomic Energy Agency (IAEA) reports that the key 750 kV Dniprovska power line, essential for the safety of the Russian-occupied Zaporizhzhia Nuclear Power Plant (ZNPP), has been repaired but cannot be reconnected due to extensive damage to its connecting substation.

Outside Brief is treating this as a source-led account. Any disputed responsibility, casualty figure, battlefield claim or single-source assertion should be treated as unconfirmed/hearsay unless confirmed by another reliable source or a named official. IAEA Director General Rafael Mariano Grossi explained that the substation, located over 100 km northwest of the ZNPP, sustained severe damage during military activity in late May. IAEA experts who recently visited confirmed that crucial equipment was severely affected, delaying the substation's return to operation despite ongoing repair efforts.

Since March, the 750 kV line has been disconnected. The plant has been relying solely on a 330 kV backup line. The IAEA underscored that technically complex repairs, including mine clearance along the front line, took place under a local ceasefire facilitated by the agency, allowing some restoration work to proceed.

Known from the source

• The 750 kV Dniprovska power line to the Zaporizhzhia Nuclear Power Plant has been repaired but is not yet operational.
• The substation connecting the power line, situated over 100 km northwest of the ZNPP, was severely damaged during military activity in late May.
• IAEA staff who visited the substation observed severe damage to critical equipment.
• Repair efforts on the substation are ongoing but not expected to conclude soon.
• Repairs were facilitated by extensive mine clearance and a local ceasefire mediated by the IAEA.

What remains unclear

The damage and limited power supply underline persistent vulnerabilities to the Zaporizhzhia plant’s energy infrastructure amid the wider conflict. The inability to fully restore the primary power line raises questions about operational stability and nuclear safety at Europe’s largest nuclear plant under Russian control.

What remains unclear: Confirm whether the central claim is corroborated; until then treat it as unconfirmed/hearsay. Precise extent and current operational status of the repaired 750 kV power line and substation. Verification of the location and nature of military damage to the substation. Current overall safety assessment of the ZNPP power supply situation by independent or additional sources.

Evidence note

Outside Brief has kept this brief source-led and attributed. Claims should be read alongside the original source linked below.

Original source: Ukrainska Pravda English. Open the source.