What are the two major turbine failure modes related to fire conditions?

The two major turbine failure modes related to fire conditions are thermodynamic and mechanical.

Thermodynamic failure modes occur when a fire causes excessive temperatures that impact the thermodynamic properties of the working fluids within the turbine system. Elevated temperatures can alter the combustion process, reduce efficiency, and potentially lead to catastrophic failures if materials start to melt or deform beyond their thermal limits.

Mechanical failure modes pertain to the structural integrity of the turbine components, which can be compromised under fire conditions. For instance, fire can lead to thermal stress and fatigue in turbine materials, causing physical damage like fractures or warping. This type of failure can significantly impair turbine operation and lead to a shutdown or costly repairs.

Together, thermodynamic and mechanical modes represent the critical failure mechanisms that can arise in potentially hazardous fire scenarios, highlighting the importance of effective fire detection and prevention systems in power plants.