Peerless Mfg. Co.

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Nuclear Steam Dryers
For over 40 years Peerless has been applying our separation technology to the nuclear power industry. Through direct work with reactor vessel and steam generator designers, Peerless has established the industry standard of performance that is utilized globally today — 99.9% steam quality.

Our secondary separators or "steam dryers" are utilized as the final stage of water separation within a Reactor Vessel (BWR plants) or within the Steam Generator Vessel (PWR plants). Moisture separator reheater (MSR) vessels are installed between the high pressure (HP) and the low pressure (LP) steam turbines at a nuclear power plant. These devices are utilized to remove water condensed from the process steam to maximize thermal efficiency of the LP turbine and minimize erosion/corrosion of steam loop piping. Peerless secondary separator design are established as the standard for the two next generation nuclear power plants: Westinghouse AP-1000 and Areva EPR.

Moisture Separator Reheater
Moisture separator reheater (MSR) vessels are installed between the high pressure (HP) and low pressure (LP) steam turbines at a nuclear power plant. These devices are utilized to remove water condensed from the process steam to maximize thermal efficiency of the LP turbine and minimize erosion/corrosion of steam loop piping. Peerless has supplied high capacity, double-pocket vane systems for new MSRs and for the retrofit of older MSRs. Many power plants today are taking advantage of MSR retrofits to economically extend the life and increase the power output of their facilities as part of their re-licensing process. The complete change-out of the MSR vane system can be achieved in a single plant outage with no need for pressure boundary work or vessel recertification.

Cross-over Separators
Some of the older BWR power plants employed Crossover Separators as the means to remove condensed water from the main steam lines between HP and LP turbines. These crossover separators were originally supplied by Peerless and many have been upgraded with retrofitted internal vane systems to increase power plant output. Typical power increases vary from 3MW to over 10MW simply by upgrading to today's Peerless advanced vane designs. Again, this work can be completed in a single plant outage without any work to the pressure boundary.