Fish & crustacean impingement

Impingement is the general term used for the collision of organisms with the filter screens protecting the water intakes. Typical fine screens have a mesh size of about 1 cm, and will retain most adult fish and crustaceans. In many power stations impinged animals are killed in large numbers. Fish kills are typically in the hundreds of thousands to millions per year, while shrimps and prawns are impinged in millions of individuals per year. Planning. We have provided computer predictions of levels of fish impingement at proposed power station sites around the UK, using our own software, which is based on many years of data of actual catches. Ongoing monitoring programs. We are carrying out monitoring of fish impingement (including salmon/trout smolts), entrainment, water quality, and the causes and impacts of CW discharge foaming, at a number of UK power stations. Intensive impingement studies. We have now completed 18 months of intensive 24-hour impingement samples at 2 UK nuclear power plants, in connection with the proposals for new-build nuclear stations, providing an unparalleled volume of data on fish impingement. Pisces is internationally recognised as expert in the prediction and minimisation of impingement effects for both environmental and operational reasons - please contact us for further information and assistance.