What action should be taken if the superheater pressure exceeds safe levels?

If the superheater pressure exceeds safe levels, activating the safety valve is a critical action. The safety valve is designed to relieve excess pressure within the system, preventing potential damage to equipment and ensuring safe operation. When the pressure in the superheater rises above the predetermined limit, the safety valve automatically opens, allowing steam to escape and reducing the pressure back to a manageable level. This mechanism is essential for maintaining safe operating conditions in a boiler system, protecting it from catastrophic failures that could result from overpressure situations.

While options like increasing feedwater supply or reducing the boiler temperature might seem relevant, they do not directly address the immediate danger of excessive pressure in the superheater. Closing the superheater inlet could potentially limit the flow of steam but may not effectively manage the situation and could disrupt the overall operation of the boiler. Therefore, activating the safety valve is the most appropriate and effective response to ensure safety and maintain the integrity of the boiler system.