88-18: Antifreezing System on Natural Draft Crossflow Cooling Towers - Cattenom Materials

88-18: Antifreezing System on Natural Draft Crossflow Cooling Towers - Cattenom MaterialsCirculating water cooling to Cattenom nuclear plant (PWR 44 1300 MWe) is provided by four natural draft crossflow cooling towers. The antifreezing system uses mechanical shutters, completed by the icing of a wire grid at the bottom of the air inlet. The information gathered last winter does not indicate serious problems. It should now be possible to modulate the shutter position in order to optimize the cold water temperature.

The study determined that the deterioration of the cooling tower over the years necessitated replacement of the structures from the ground up

also recommendations for tower orientation to minimize recirculation

including two column cross-section configurations with various lengths

the paper provides recommended design concepts for future reuse cooling towers where biological or hydrocarbon fouling risks are anticipated

optimization of pH control

it was a bold decision

Common causes of system failure unrelated to water treatment include: (a) Operational Issues

Molybdate can function as a localized corrosion inhibitor for mild steel

Guidance is given for use of the new method within the context of hazard analysis and control to prevent legionellosis

The correlation between the psychrometer and the thermodynamic wet bulb temperature is reviewed

Abstract: Concrete cooling towers in seismic zones that have been exposed to corrosion causing conditions are susceptible to deterioration over a period of time

Where certification of seismic resistance is required