Thermal control system for fault detection and mitigation within a power generation system

A system (10) includes a radiation sensor (66) configured to direct a field of view (90) toward at least one conduit (74) along a fluid flow path into a heat exchanger (34, 54). The radiation sensor (66) is configured to output a signal indicative of a temperature of the at least one conduit (74). The system (10) also includes a controller (68) communicatively coupled to the radiation sensor (66). The controller (68) is configured to determine the temperature based on the signal, to compare the temperature to a threshold range, and to adjust a fluid flow through the fluid flow path or the at least one conduit (74) if the temperature deviates from the threshold range.