Wachs Services’ projects include Nuclear new builds, Nuclear outage and shutdown modification and repair, fabrication and installation, project management and manpower support.
Additional projects include decommissioning work, fossil fuel plants and
the first integrated gasification combined cycle plant.
Vogtle Unit 3 CA01 Module
Georgia Power announced the heaviest "lift" of the Vogtle expansion project to date – the placement of the CA01 module for Unit 3. Weighing 2.28 million pounds, or 1,140 tons, the CA01 module is 70 feet tall and 80 feet wide. The CA01 module was assembled on-site in the modular assembly building (MAB), moved to the nuclear island as one piece and lifted into place Saturday by a 560-foot tall heavy lift derrick, one of the largest cranes in the world.
Wachs Services assisted CB&I with the final assembly of the CA01 module inside the Modular Assembly Building (MAB). Wachs provided task oversight, field engineering, safety, specialty machining services and welding support site wide. Wachs supplied over 40 management support staff, 175 welders, 25 machinist and additional positions to support the MAB and Nuclear Island.
Wachs Services has role in construction of the CA20 module for Plant Vogtle
In March, Georgia Power completed the CA20 module for Plant Vogtle units 3 and 4 near Waynesboro, GA. The project team successfully placed the 2.2 million pound, or 1,100 ton, module into the Unit 3 nuclear island. The CA20 module is more than five stories tall and is the heaviest “lift” of the project to date. The module’s massive size, approximately 67 feet long by 47 feet wide, will house various plant components including the used fuel storage area.
Wachs Services performed the weld out of the CA20 module at the Vogtle facility using GTAW (gas tungsten arc welding) and GMAW (pulse mig weld process) on carbon and duplex materials. To meet the challenging building requirements and time schedule for this module, Wachs used an automatic GMAW (pulse mig weld process) where the welder views the weld on a monitor by using a video camera mounted on the weld head. When welds were required in smaller more confined areas, for example inside a wall, mirrors were mounted on the tig torch to reflect the image back to the camera and therefore transferred back to the monitor.
Wachs uses the above processes on the long seams that attach the panel walls together forming the CA20 module. The walls contain mainly two materials – 572 Carbon Steel and Duplex Stainless Steel. Wachs Technical Service, has on average 100 welders on this project along with 2 project managers, 10 supervisors and several field engineers. WTS performs the training, testing and certification of the welders to the client’s procedures in their facility in Belmont, NC.
Once the units enter service, fuel efficiencies from nuclear generation combined with ongoing customer benefits such as the recently finalized federal loan guarantees, are expected to put downward pressure on customer rates – cementing the project’s status as the most economic choice for meeting Georgia’s future energy needs. The project is the largest job-producing project in the state, employing approximately 5,000 people during peak construction and creating 800 permanent jobs when the plant begins operating. The addition of the two new units will make Plant Vogtle the only four-unit nuclear facility in the country.
SCE&G Williams Station in Goose Creek, SC
Wachs Services provided welding and machining services at the SCE&G Williams Station. The machining scope consisted of the following:
2) 17.131"OD X 2.168MW cuts and preps
1) 20"OD X 2.173"MW cut and prep
2) 18"OD X 3.625"MW cuts and prep
2) 8.625"OD X 1.286MW cuts and prep
All material machined and welded was P-91 with the exception of the Boiler connection welds which were welded, P-91 to P-22.
1 Company Truck
2 - 20" Split Frames
1 - 10" Split Frame
2 - 20" Bridge Slides
2 Counter bore attachments
1 Tool trailer/Break trailer
3 - Chain Dearman Clamps
6 - Fit-up/Friction Clamps
The welding scope included:
2) 8.625"OD X 1.286MW
2) 17.131"OD X 2.168MW
2) 18"OD X 3.625"MW
6) 18"OD X 1.955MW
Steam Generation Team, Charlotte, NC
Wachs Services supplied Steam Generation Team with project management, field supervision, large bore and small bore welders for the Steam Generator Replacement at the Sequoyah and Waterford plants 2013. Work was performed on schedule and within budget.