Prototype Fast Reactor sodium tanks
At approximately 8:00pm on 20 April, site emergency personnel responded to a call at the sodium storage tanks at the Prototype Fast Reactor complex.
![](https://assets.publishing.service.gov.uk/government/uploads/system/uploads/image_data/file/148055/s300_PFR.jpg)
A planned reaction of material inside a tank resulted in an excursion, causing the release of a small amount of caustic liquor.
No-one was injured and damage was confined to components in the tank. We believe the environmental impact is low. Emergency personnel kept the tank under observation as a precaution.
SEPA and ONR have been informed of the occurrence, and DSRL today is commencing its own investigation of the circumstances.