# Flamanville lifts preventive measures after Storm Austen checks

> EDF ended the preventive support and mobilisation plan at Flamanville at 17:41 on 23 October after weather improved and site inspections confirmed safety conditions.

- Topic: Project and operations update
- Subjects: Nuclear energy, Electricity, Construction
- Event date: 2026-10-23
- First published on EPC Feed: 2026-10-25T20:55:46.165Z
- Updated: 2026-10-25T20:55:46.165Z
- Countries: France
- Page: https://epcfeed.com/news/edf-flamanville-lifts-storm-austen-preventive-measures


## Key facts

- Preventive plan lifted: 23 October 2026, 17:41
- Operating status: Unit 2 generating; units 1 and 3 in maintenance

EDF lifted the preventive support and mobilisation plan at the Flamanville nuclear site at 17:41 on 23 October after Storm Austen passed. The company said improved weather and checks across the site confirmed that conditions were suitable to end the temporary arrangements for people and facilities. The measures had been put in place from 22 October in response to forecasts of strong winds and heavy swell. This update records the end of a precautionary response, not an interruption to electricity production caused by the storm.

Before the storm, EDF secured outdoor construction areas, used remote work where possible and mobilised on-call teams. The company said weather improved and site checks were completed before precautions were lifted. The notice describes preventive site arrangements, not a reactor event or evacuation.

At publication, units 1 and 3 were stopped for maintenance while unit 2 was producing. A site-level weather update does not mean all reactors were operating or that the storm caused the maintenance outages.

EDF’s public information report for 2021 describes the site’s formal crisis arrangements and helps distinguish them from the preventive step reported in 2026. The document says a site-specific organisation covers Flamanville 1 and 2 and the EPR, with responsibilities defined for the parties involved. It describes the internal emergency plan (PUI) and the security-protection plan (PSP) as part of the formal framework, aligned with the prefecture’s external intervention plan. Separately, Plans d’appui et de mobilisation (PAM) are described as tools for complex situations and anticipating deterioration. The 2021 report lists eight PAM categories and five internal emergency-plan types, including climatic hazards. The framework aligns the internal plans with the prefecture’s external intervention plan. It also says the site conducted 11 crisis exercises during 2021. This historic document is context for the terminology; it does not establish that a PUI was activated during Storm Austen in October 2026.

The operational significance of the update is the staged use of weather precautions and their withdrawal after inspection. Securing site materials, limiting travel and preparing standby response are preventive controls intended to protect workers and maintain safe operations during hazardous conditions. The company states that the inspections supported lifting the plan; no independent inspection report is included in the source. The available record therefore supports a bounded conclusion: EDF’s preventive arrangements ended at a precise time after conditions improved, with unit 2 still in production and units 1 and 3 still in maintenance.

## Sources

1. [Levée des mesures préventives mises en place à la centrale de Flamanville lors du passage de la tempête Austen](https://www.edf.fr/levee-des-mesures-preventives-mises-en-place-a-la-centrale-de-flamanville-lors-du-passage-de-la-tempete-austen). Company release, EDF, Published 2026-10-23, Read 2026-10-25.
2. [EDF Flamanville site environmental and installation report](https://www.edf.fr/sites/groupe/files/2022-06/EDF_RAPPORT_FLAMANVILLE_2021-VF_0.pdf). Reference, EDF, Read 2026-10-25.