Which motor-operated valve may be operated locally and for closure on the BCC, the Damage Control deck, and the Boiler Front Console?

Which motor-operated valve may be operated locally and for closure on the BCC, the Damage Control deck, and the Boiler Front Console?

• A. Desuperheater Outlet Valve
• B. Main Steam Stop Valve
• C. Feedwater Stop Valve
• D. Drain Valve

Answer: (A)

The essential idea is that some boiler-room valves are designed for rapid, multi-point control to shut off critical flow from several locations in an emergency. The desuperheater outlet valve fits this need because it sits in the desuperheating circuit and must be quickly isolated to control steam temperature and protect equipment. Being motor-operated with local controls at the Boiler Front Console and remote controls at the Boiler Control Console (BCC) and Damage Control deck allows closure from all three locations, ensuring you can cut off desuperheater flow no matter where the operator is. Other valves in the list serve important roles but aren’t typically required to be closed from all three stations. The main steam stop valve, while critical, is generally controlled from the main boiler/turbine control path and isn’t routinely operated locally at multiple separate control points. The feedwater stop valve and drain valve are also not normally configured to require local and multi-station closure in the same way, and their control arrangements don’t match the multi-location closure scenario described.

The essential idea is that some boiler-room valves are designed for rapid, multi-point control to shut off critical flow from several locations in an emergency. The desuperheater outlet valve fits this need because it sits in the desuperheating circuit and must be quickly isolated to control steam temperature and protect equipment. Being motor-operated with local controls at the Boiler Front Console and remote controls at the Boiler Control Console (BCC) and Damage Control deck allows closure from all three locations, ensuring you can cut off desuperheater flow no matter where the operator is.

Other valves in the list serve important roles but aren’t typically required to be closed from all three stations. The main steam stop valve, while critical, is generally controlled from the main boiler/turbine control path and isn’t routinely operated locally at multiple separate control points. The feedwater stop valve and drain valve are also not normally configured to require local and multi-station closure in the same way, and their control arrangements don’t match the multi-location closure scenario described.