Effects on Freshwater Organisms of Magnetic Fields Associated with Hydrokinetic Turbines

Report

Title: Effects on Freshwater Organisms of Magnetic Fields Associated with Hydrokinetic Turbines
Publication Date:
July 01, 2011
Document Number: ORNL/TM-2011/244
Pages: 55
Sponsoring Organization:
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Technology Type:

Document Access

Website: External Link
Attachment: Access File
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Citation

Cada, G.; Bevelhimer, M.; Riemer, K.; Turner, J. (2011). Effects on Freshwater Organisms of Magnetic Fields Associated with Hydrokinetic Turbines. Report by Oak Ridge National Laboratory (ORNL). pp 55.
Abstract: 

Underwater cables will be used to transmit electricity between turbines in an array (interturbine cables), between the array and a submerged step-up transformer (if part of the design), and from the transformer or array to shore. All types of electrical transmitting cables (as well as the generator itself) will emit EMF into the surrounding water. The electric current will induce magnetic fields in the immediate vicinity, which may affect the behavior or viability of animals. Because direct electrical field emissions can be prevented by shielding and armoring, we focused our studies on the magnetic fields that are unavoidably induced by electric current moving through a generator or transmission cable. These initial experiments were carried out to evaluate whether a static magnetic field, such as would be produced by a direct current (DC) transmitting cable, would affect the behavior of common freshwater fish and invertebrates.

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