Hinkley Point’s Acoustic System Proves Highly Effective in Fish Protection
Recent sea trials have demonstrated the remarkable effectiveness of a new acoustic fish deterrent system at Hinkley Point C, located near Burnham-On-Sea. This groundbreaking technology has shown an ability to keep over 90% of targeted fish species away from the power station’s water intakes.
Innovative Technology for Fish Protection
The acoustic fish deterrent utilizes ultrasound technology, positioning it as a pioneering solution among three separate fish protection systems implemented at Hinkley Point C. This facility holds the distinction of being the first power station in the region to adopt such measures, with an investment exceeding £700 million dedicated to ensuring superior fish protection.
Enhancing Safety for Marine Life
- The intake heads have been specially designed to reduce water speed, enabling fish to escape from as close as 2 meters.
- A dedicated fish return system will facilitate the movement of fish back to the sea.
- The overall impact on fish populations is anticipated to be minimal, according to EDF.
Successful Testing and Future Research
Extensive testing of the ultrasound system has been carried out by Swansea University, revealing its high efficiency in deterring fish from the water intake areas. For instance, tests on tagged twaite shad indicated that, during the operation of the system, only one shad ventured within 30 meters of the intakes, a significant reduction compared to 14 shad observed without the deterrent.
Ongoing tank tests will continue through early 2026 to further assess its performance. Research from Swansea University has also enhanced understanding of fish movements in the Severn Estuary. It was noted that migrating salmon predominantly use the main channel, largely avoiding the vicinity of Hinkley Point C’s intakes.
Community and Environmental Implications
The success of the acoustic deterrent system carries positive implications for local communities. It is believed that the efficient functioning of the technology will negate the need for creating 900 acres of saltmarsh as environmental compensation, an aspect that had faced opposition from residents along the Severn.
| Parameter | With Deterrent | Without Deterrent |
|---|---|---|
| Tagged Twaite Shad Observed | 1 near intake | 14 near intake |
| Tagged Salmon within 1km | 2 detected | N/A |
Looking Ahead
The results from this research will be submitted for regulatory consideration to the Marine Management Organisation in late 2026. Dr. David Clarke from Swansea University remarked on the encouraging results, noting that a significant majority of the tagged fish have successfully avoided areas surrounding the intake heads protected by the system.
Chris Fayers, Head of Environment at Hinkley Point C, expressed confidence in the system’s efficacy, stating it aligns with the station’s environmental responsibilities while providing essential low-carbon electricity. Pete Kibel, Managing Director of Fishtek Marine, highlighted the project’s potential influence on future power stations globally.
