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    Hinkley Point C acoustic fish deterrent: design and permitting lessons for engineers

    February 10, 2026|

    Reviewed by Tom Sullivan

    Hinkley Point C acoustic fish deterrent: design and permitting lessons for engineers

    First reported on New Civil Engineer

    30 Second Briefing

    An ultrasonic acoustic fish deterrent designed for EDF’s Hinkley Point C cooling water intakes has proved “highly effective” in Swansea University trials, significantly reducing fish approach rates to the intake zone. The system uses targeted sound frequencies to steer multiple species away from the intake channel, aiming to meet Environment Agency requirements on impingement and entrainment without major changes to the intake structure. Trial results may remove the need for a large compensatory saltmarsh scheme on the Severn Estuary, easing local planning and coastal engineering constraints.

    Technical Brief

    • If accepted by regulators, similar deterrent configurations could be specified for other large estuarine cooling-water abstractions.

    Our Take

    Within the 11 Environmental stories in our coverage, Hinkley Point C is one of the few UK assets where marine ecology mitigation is being trialled at full scale, signalling regulators’ expectation that large coastal plants demonstrate measurable biodiversity safeguards rather than just desk-based assessments.

    For United Kingdom projects, our database shows most recent Safety-tagged pieces focus on construction workforce risk, so an acoustic fish deterrent at Hinkley Point C broadens the safety lens to encompass ecological risk management that can influence future permitting conditions for other coastal energy schemes.

    Swansea University’s involvement aligns with a pattern in our Sustainability-tagged items where UK universities act as lead technical partners on impact monitoring, which often helps operators translate research-grade findings into licence conditions and long-term environmental performance baselines.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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