Qualitative Risk Assessment of Combined Cycle Power Plant Using Hazards Identification Technique

This study is subjected to investigate risk during operation of combined cycle power plant using hazards identification technique. The study concentrates on anticipated risk governed with the normal operation of boiler, gas & steam turbines and generator systems, gas inventory system at typical combined cycle power plant. The assessment is conducted based on EVENT TREE analysis of the engineering safety feature systems contributed during the abnormal operation of the main systems. The identified hazards are classified according to their consequences and threats to the operation of the plant. Three main systems were chosen for the study in the combined cycle power plant which are the boiler, gas and steam turbines and generator in addition to gas inventory system. Risk and hazard are determined based on these three systems during the transient conditions. The hazards identification is analyzed through risk evaluation based on likelihood and severity of the hazards.