Which motor-operated valve may be operated locally and for closure on the BCC, the Damage Control (DC) deck, and the boiler front console?

Which motor-operated valve may be operated locally and for closure on the BCC, the Damage Control (DC) deck, and the boiler front console?

• A. Desuperheater
• B. Safety Valve
• C. Gland Seal Valve
• D. Main Steam Valve

Answer: (A)

This item focuses on valves that must be shut off quickly from multiple control points to manage boiler steam conditions. The desuperheater valve fits this role because it is motor-operated and designed for both local operation at the desuperheater and remote closure from several control stations—the Boiler Control Console (BCC), the Damage Control (DC) deck, and the boiler front console. Being able to close it from these locations allows rapid isolation of desuperizer bleed water, which is crucial for preventing overcooling or for emergency shutdown of the desuperheater flow. The safety valve isn’t manually closed to stop flow; it’s a relief device that opens to prevent overpressure. The gland seal valve handles gland cooling water and isn’t part of the desuperheater control scheme. The main steam valve controls the main steam line, but the described multiple-control-point closure aligns specifically with the desuperheater valve’s design.

This item focuses on valves that must be shut off quickly from multiple control points to manage boiler steam conditions. The desuperheater valve fits this role because it is motor-operated and designed for both local operation at the desuperheater and remote closure from several control stations—the Boiler Control Console (BCC), the Damage Control (DC) deck, and the boiler front console. Being able to close it from these locations allows rapid isolation of desuperizer bleed water, which is crucial for preventing overcooling or for emergency shutdown of the desuperheater flow.

The safety valve isn’t manually closed to stop flow; it’s a relief device that opens to prevent overpressure. The gland seal valve handles gland cooling water and isn’t part of the desuperheater control scheme. The main steam valve controls the main steam line, but the described multiple-control-point closure aligns specifically with the desuperheater valve’s design.