The Latest on Fossil and Combined/HSRG Plant FAC

Author & Speaker : Barry Dooley

Company : Structural Integrity Associates

Country : Canada

Topic :

Risk Evaluation

Operation Feedback

Combined Cycle/HRSG

ABSTRACT :

FAC continues unabated in fossil and combined cycle/HRSG plants worldwide. No new areas have appeared but the same suite of locations has been predominant for the last 10 years. In fossil plants there is probably a predominance of two-phase FAC with particular emphasis in feedwater heater drains and emergency drains. In combined cycle/HRSG plants the two-phase variant also appears to continue in locations where steaming takes place in economizer sections and where two-phase mixtures are expected near the outlet sections of low and intermediate pressure evaporator circuits. In both plants, an emphasis has been placed on optimizing the cycle chemistry. Overall although FAC is well understood it remains an enigma: a number of specific items will be discussed to emphasis the inability to identify specific locations of damage.

Speaker Biographical Information

Barry Dooley (PhD) is editor of books on metallurgy, power generation, boiler tube failures, cycle chemistry and life extension and assessment of fossil plants;and co-author on boiler tube failures and steam turbine blade failure. He is also the one of the authors of the book "Flow-Accelerated Corrosion in Power Plants" edited by the Electric Power Research Institute EPRI, SIEMENS and EDF.