Nuclear Services / Installation and Modification Services
Field Machining
Background WEMS offers multiple approaches for severance cutting and weld-end preparation for any size, Westinghouse, through its subsidiary WEC thickness or diameter pipe, regardless of material Equipment and Machining Solutions (WEMS), type, access, hazardous field conditions or space specializes in machining projects that include restrictions. WEMS uses MDM methods for stud first-of-a-kind tool design, manufacturing, testing, and bolt removal, and abrasive water-jet cutting qualification and field deployment. and plasma cutting for unique situations. EDM is used for applications such as boat sampling and Description applications requiring more precise tolerances Some of the specialty machining projects include: and/or surface finishes.
• Alloy 600 crack • Spent-fuel canister Benefits mitigation utilizing machining reaming and electrical • Steam chest Canister Machining: Specialized tools designed discharge machining machining and developed for installing canister lids, including the weld-prep machining required. (EDM) • Steam generator • Flange facing replacements (SGRs) Steam Generator Replacements: Machine weld • Governor/throttle for PWRs preparation for installing new steam generators, valve machining • Stud and thread including primary reactor coolant piping and • Inlet sleeve repair repair secondary piping. • Reactor vessel head • Superheat/re-heat (RVH) upper head header machining temperature reduction • Top hat machining (UHTR) and upflow • Turbine shell using EDM machining • Reactor temperature • Turbine upgrade detector (RTD) machining/LP-HP bypass and piping replacement • Valve seat repair • Safe end replacement
In addition, WEMS has extensive field experience and services, including:
• Abrasive water-jet • Grinding (AWJ) cutting • Metal disintegration Machine cutting canopy seal on mock-up • Boring machining (MDM) • Drilling • Milling • EDM • Pipe cutting/weld • Field machining preparation centers (FMCs) • Plasma cutting • Flange facing • Reaming Computer Numerically Controlled (CNC) Machines: Pipe preparation and flange-facing capabilities. Boring: The capability to bore pumps and valves up to 70 inches in diameter. Flange Repair/Machining: Flanges up to 10 feet in diameter machined with a flat or phonograph finish using the WEMS portable flange-facing machine. The restored surfaces mate uniformly across the entire flange face, creating uniform gasket compression and sealing forces around the entire flange. Stuck-stud Removal: An MDM technique using a graphite electrode to cut out the core of the stud, followed by another electrode to create a wide slot in the remaining stud remnant. A tool is then used to remove the remaining strip of material, allowing the stud remnant to be collapsed and removed. Completed narrow groove weld prep using Omega 9B™
EDM: Electrical discharge machining used for material sample applications that need precise tolerances and/or surface finishes. EDM is also a one-of-a-kind application. AWJ Cutting: Abrasive water-jet cutting process utilizes an ultra-high-pressure intensifier pump that pressurizes water up to 55,000 psi. This process forces the water through a small nozzle, typically 0.10-inch diameter, which generates a high-velocity water-jet stream at speeds of up to 3,000 feet per second. Drilling: Portable, hydraulic and electric drilling systems adapted for drilling/reaming needs. Drills can also be used for a conventional stuck-stud removal process. Milling: Portable hydraulic and electric milling systems to adapt to any milling needs for facing, boring, reaming, Manual pipe lathe performing counter bore operation keyway cutting and custom applications. FMC: Transportable, self-sufficient and fully tooled machine shops, outfitted with a standard line of machinery, including a complete inventory of common bar and round stocks. Custom Machining Solutions: The capability to engineer, manufacture, test, qualify and deliver custom-machining applications to meet customer needs.
Omega 9B™ (CNC pipe lathes) set in multiple locations for machining steam generators Omega 9B is a trademark or registered trademark of Westinghouse Electric Company LLC, its affiliates and/or its subsidiaries in the United States of America and may be registered in other countries throughout the world. All rights reserved. Unauthorized use is strictly prohibited. Westinghouse Electric Company 1000 Westinghouse Drive Cranberry Township, PA 16066 June 2015 NS-IMS-0030 www.westinghousenuclear.com ©2015 Westinghouse Electric Company LLC. All Rights Reserved