Arkansas Power and Light Company

James E Nestell, Jr

Donal W Moore

Albert C Buford, Iii

In combination with a steam generator having a plurality of generator tube support plates, each generator tube support plate having a plurality of openings and a plurality of generator tubes, each tube passing through aligned openings in the support plates, a corrosion monitoring system is provided including a mockup probe, comprising a probe tube support plate having an upper side and a lower side and having substantially the same thickness and being constructed of substantially the same material as the generator tube support plates, having at least one opening of substantially the same size and shape as the openings of the generator tube support plates; at least one probe tube having an upper end and a lower end and having substantially the same diameter as the generator tubes and being constructed of substantially the same material as the generator tubes, the probe tube passing through the opening of the probe tube support plate; and wherein the mockup probe is adapted such that it may be inserted and sealed within the steam generator during chemical cleaning operations. The mockup probe is preferably used in combination with electronic linear polarization and zero resistance ammetry probes, which electronically measure corrosion during cleaning operations.

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Alexandria, VA, United States of America

James E Nestell, Jr