Turbine Main Steam By-Pass Valve Refurbishment

The Work location is 76 North Power Plant Loop, Richland, WA 99354, a nuclear power generating facility. The Work shall be performed inside the Protected Area of Columbia. Contractor shall provide qualified, trained, and experienced labor, supervision, equipment, tools, materials, and transportation to perform the inspection and refurbishment of MS-V 160A, 160B, 160C, and 160D. Work includes, but is not limited to, the following: Perform an as-found inspection of hydraulic power unit and valve actuator assembly. Conduct hydraulic system maintenance, including draining, capturing, and disposing of hydraulic fluid from all associated hydraulic lines in accordance with station environmental and safety requirements. Disassemble the valve as required to perform maintenance work. All disassembly shall be completed following the approved maintenance manual, Original Equipment Manufacturer (OEM) instructions, and applicable site procedures. Perform a detailed inspection of all valve internals, including examination of sealing surfaces, wear points, corrosion, alignment, and any abnormalities requiring corrective action. Refurbish the valve assembly, including replacement of all soft goods (seals, gaskets, O-rings, and other elastomeric components). Reassemble the valve in accordance with OEM specifications and site procedures, ensuring proper alignment and torque values. Remove the hydraulic actuator from the valve in preparation for refurbishment, following proper mechanical isolation and lifting/rigging requirements. Disassemble the hydraulic actuator per OEM instructions and approved site procedures, ensuring all components are inspected for wear, scoring, or damage. Refurbish the actuator assembly, including replacement of all soft goods and restoration of components as required to return the actuator to proper operating condition. Reassemble the hydraulic actuator, ensuring all components meet tolerance and alignment requirements set forth in the maintenance manual. Reinstall the actuator onto the valve assembly, ensuring correct coupling, alignment, and secure mounting in accordance with OEM guidelines. Perform calibration of the valve and actuator assembly, as station system conditions safely allow, to verify proper stroke, positioning, and operational responsiveness. Other tasks as directed by the Technical Representative or their designee.