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Updated: May 6, 2026

Protocol for Acute and Chronic Ecotoxicity Testing of the Turquoise Killifish Nothobranchius furzeri
Published on: April 24, 2018
Toxicity to fish of two organic reactor coolants
1Environmental Control, Health and Safety Branch, Whiteshell Nuclear Research Establishment, Pinawa, Manitoba, Canada.
Abstract:
The use of terphenyl compounds to cool nuclear reactors prompted an enquiry into the effect of these substances in the aquatic environment, should they be accidentally released.Santowax OM + 30% high boilers and HB-40 are two terphenyl compounds under study as nuclear reactor coolants at Whiteshell Nuclear Research Establishment. The acute toxicity of these two coolants to rainbow trout fry has been investigated, and it was found that Santowax OM was the more toxic. The behaviour of fish exposed to suspensions of Santowax OM in water is briefly described.
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