Report on preliminary studies using the wedge wire screen model intake facility. Final report

Technical Report · Tue Nov 01 04:00:00 EST 1983

OSTI ID:6627287

Weisberg, S B; Jacobs, F; Burton, W H; Ross, R N

Impingement and entrainment are two of the more important mechanisms through which power plants may impact aquatic biota. Various modifications to cooling water intake structures have been proposed in an effort to reduce and/or eliminate power plant impingement and entrainment losses (EPA 1976, Cannon et al. 1979). One of the more promising technologies to be developed in recent years is the wedge wire screen (also known as Johnson screen or profile wire screen). These screens are designed to have a low approach velocity. Because they are capable of reducing both entrainment and impingement, wedge wire screens are an attractive intake system especially in locations where losses of fish populations due to entrainment and/or impingement are high. Existing applications of wedge wire screens have all been restricted to power plants which draw their cooling water from freshwater sources. Since many power generating stations in Maryland are located in or near saline waters, several questions must be addressed if wedge wire screens are to be considered for application in Maryland. In an effort to answer some of these questions, Maryland's Power Plant Siting Program (PPSP) purchased a floating intake simulator test facility in 1982 to test the suitability of wedge wire screens in estuarine waters. Initial tests of the facility, conducted in August 1982, were designed to determine its sampling characteristics, and, in a preliminary fashion, the effectiveness of wedge wire screens in reducing entrainment of estuarine organisms relative to entrainment through conventional technology.

• Research Organization: Martin Marietta Corp., Baltimore, MD (USA). Environmental Center
• OSTI ID: 6627287
• Report Number(s): PB-84-177955
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200200* -- Fossil-Fueled Power Plants-- Waste Management
520500 -- Environment
Aquatic-- Site Resource & Use Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
ANIMALS
AQUATIC ORGANISMS
COOLING TOWERS
DESIGN
ECOLOGY
ENTRAINMENT
ENVIRONMENTAL IMPACTS
ESTUARIES
FEDERAL REGION III
FISHES
FOSSIL-FUEL POWER PLANTS
INTAKE STRUCTURES
MARYLAND
MECHANICAL STRUCTURES
NORTH AMERICA
PLANKTON
POLLUTION
POWER PLANTS
SURFACE WATERS
THERMAL POWER PLANTS
TOWERS
USA
VERTEBRATES
WATER POLLUTION
ZOOPLANKTON