Which outcome occurs when a diverter valve fails closed in a combined cycle gas turbine's heat recovery steam generator?

💡 Explanation

Boiler tube dry-out and failure occurs because the primary exhaust gas flow path is blocked, causing localized overheating due to reduced steam generation; therefore, the tubes overheat and potentially rupture, rather than turbines overheating, emissions increasing, or overfilling a condenser.

• Which risk significantly increases for forged steel components in persistently humid environments?
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• Which outcome occurs in a pneumatic actuator when supply pressure exceeds the actuator's design limits?