ENVIRONMENTAL IMPACT STUDY OF SUPER-LARGE NATURAL VENTILATION SEAWATER COOLING TOWER OF A NUCLEAR POWER PLANT

Abstract

The supporting cooling tower of a 1000MW nuclear power plant (NPP) in offshore is a super-large natural ventilation seawater cooling tower. The operation of the cooling tower will have an impact on the surrounding environment, and the salt deposition problem of seawater cooling tower is one of the current EIA concerns. In this paper, taking the super-large naturally ventilated wet cooling tower of a NPP as an example, according to the physical principle and formula of water vapor diffusion recommended by the American Nuclear Regulatory Commission, a mathematical model of the cooling tower was established to study the influence of salt deposition of the cooling tower by the key parameters of the cooling tower and the drop ratio (water eliminator efficiency), The results show that reducing the water drifting rate of the water collector （less than 7 per million） is an effective measure to reduce salt deposition.