Cooling water systems closed

Special attention must be paid to peripheral units, vital for the safe operation of the system, including cooling water, instrument air, Nitrogen inertisation. A closed cooling water system was preferred since in such remote locations water availability is limited. 

Chloride ion concentration in a closed cooling water system may be concentrated as much as seven times and it can contribute to corrosion of stainless steel equipment. Brazos River water contains as much as 200 ppm during dry periods. Thus, it is doubtful that the increased chloride (7 ppm) would cause measurable additional corrosion in any case. 

Boilers, closed cooling water systems, and other closed circulating fluid systems can be treated with inhibitors with continuous injection. When snch systems are started up after construction or major maintenance, the inhibitor is often injected at higher-than-normal concentration to permit rapid development of protective films (Tang et al. 2012). 

Many different corrosive agents can accumulate in a closed cooling water system if the concentration factor is too high. The use of inhibitors, noted above, is a standard technique. Upgrading the materials of construction also can prolong the life of equipment. Parkinson [13], for example, describes the use of a 75-p,m coating of electroless nickel on cooling water pumps. 

Closed cooling water system for reactor service... 

Closed Cooling Water System for Reactor Service... 

The closed cooling water system consists of a separate, forced circulation loop. This system uses water piped from the site service water source to provide a heat sink for selected nuclear system equipment. Its purpose is to provide a second barrier between the primary systems containing radioactive products and the service water system that is the final heat... 

The closed cooling water system design temperature depends on the maximum temperature of service water intake. The closed cooling water system satisfies the plant s full power load requirements. Extra cooling capability, with all spares operating, is adequate to handle plant startup duty. 

Much of the materials selection for service water systems and closed cooling water systems is dictated by the water source (e.g., carbon steel for fresh waters coated or lined steel, copper alloys, or stainless steels for saline waters). Coatings, linings, copper alloys, stainless steels, super aus-tenitics, super feiritics, and titanium have been used for replacements. 

TCS Turbine Building Closed Cooling Water System... 

Turbine building closed cooling water system. 

No design requirements associated with maintaining safety functions are placed on the turbine building closed cooling water system. 

D. Thieny, Microbial corrosion in a closed cooling water system the role of Nitrobacter, Swedish Corrosion Institute, Stockholm. Internal report, 1987, pp. 1. D. Thieny, Field observations of microbiologically induced corrosion in cooling water systems, Mater. Performance 26 35—41 (1987). 

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