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Tenaska Lindsay Hill Generating Station Ammonia Pump Problem

The facility’s anhydrous-ammonia forwarding pumps did not allow for double-valve isolation during maintenance. These pumps are only required for use on very cold days. This requires additional maintenance and laying them up for periods of non-use. The system had single-valve isolation from the ammonia storage tank to the suction of the pumps, a potential safety risk for the O&M team.Solution. Plant management decided to install double-block-and-bleed capabilities to the liquid suction line from the storage tank and liquid return line to the storage tank

Revision Date:  8/7/2014

Tags:  Tenaska, Ammonia, Pump, Valve, Maintenance, Safety, Combined Cycle Journal, USA