The National Fire Protection Association (NFPA) and American Water Works Association require periodic inspection, testing and maintenance of water-based fire protection systems. This includes evaluating thousands of steel water storage tanks that have been constructed to store potable water in systems nationwide. At this nuclear generating facility, above ground steel tanks are used as part of fire protection and potable water systems in several areas, including the 100, 200 and 400 Areas.
To ensure compliance with applicable requirements, Ballard Marine Construction certified commercial diver’s safely and successfully conducted internal steel water tank inspections, cleaning and minor repair work in four nuclear generating site water storage tanks in accordance to operational safety and health standards.
The elevated tanks ranged in size from 300,000 gallons to 750,000 gallons. Working underwater and in confined spaces divers were required to document via HD video and real time audio recording that the tank inspections were meeting project objectives. Out team safely performed more than 4,000 worker hours on this contract with no quality control issues.