Officials say the Y-12 National Security Complex in Oak Ridge will hire about 400 people to begin construction on the new Uranium Processing Facility soon. Officials are looking to fill several positions, including skilled craft and professional service personnel. The first wave of construction will begin in the next few months. An announcement of when applications will be accepted will be made soon. The U.S. National Nuclear Security Administration granted approval for construction of three buildings: the main processing building, the salvage and accountability building and the process support facilities. Following the first wave of construction, Y-12 site contractor Consolidated Nuclear Security LLC said it expects to hire 1,900 skilled fact and professional services personnel to continue work on the project. The construction work is part of the Department of Energy’s effort to modernize the Y-12 complex, replacing the World War II-era plant with a modern, more efficient and safer facility. The UPF is expected to be complete by 2025.