Challenge: This 1675 MW nuclear power plant suered extensive fouling that impaired optimal power production and created burdensome operating and maintenance conditions. Maintaining the system and reliability of performance were key factors as well as an interest in enhancing current performance to even higher levels. The plant was experiencing fouling problems in the main cooling water intake system with the most signicant problems in the intake bays, the pipes between the main cooling water pumps and the condensers, and in the condenser inlet and outlet water boxes. The plant experienced a broad range of fouling problems from macro-fouling and micro-fouling to scaling and sedimentation. Treatment: Mexel products were used to establish a preventive layer to maintain the cleanliness of th

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