CORROSION-ACTIVE MICROFLORA OF WATER TECHNOLOGICAL ENVIRONMENTS OF THE ATOMIC POWER STATION

摘要

In the course of nuclear power plants (NPP) work in the process equipment with natural water there is a continuous receipt of impurity, in particular the microbiological origin, constructional materials causing biological corrosion (Fig. 2,3). Application of chemical methods for an estimation of quality of technological water not always yields effective result owing to a lack of the information on a biological component of analyzed environments and consequences of its influence on reliability of the systems executed from various materials. Bacteria of corrosion group get to pipelines of power installations through systems chemical-water-treatment (CWT) (Fig.l), ionic materials which do not possess bactericidal properties, and on the contrary, are a necessary substratum for microflora ability to live. In large quantities breeding on ionic-resin (IR), especially at lay modes or in reserve branches of water purification, the microflora blocks IR groups. Without preliminary antimicrobic processing, there can be a fast bacterial poisoning of resins, frequently the irreversible. Investigated presence of some corrosion-active groups of microorganisms in natural water and systems CWT on the NPP. Number sulfate-reducing bacterium (SRB) in ground deposits of the river more than on depth 1,5 m (accordingly, 150 and 50 cl./ml). Amount in water CWT SRB are not revealed. It is connected with adverse conditions for their development (increase pH environments after clarifying agent). The maximum number denitrifying bacteria (DNB) and thiobacterium (TB) is revealed in the end of chain CWT (accordingly, 2,0·10~6 and 9,5·10~6 cl/ml), minimum - after clarifying agent (3,0·10~3 and 9,5·10~3 cl/ml) and in tank of a dirty condensate (3,0·10~3 and 3,0·10~4 cl/ml) (tabl.).