Moller Upstream Enclosure

The Department of Energy is soliciting proposals for the fabrication, assembly, testing, and delivery of a MOLLER Upstream Enclosure (USE), an aluminum vacuum chamber designed for Thomas Jefferson National Accelerator Facility (TJNAF). The procurement requires a subcontractor to manufacture and deliver two primary assemblies—a TOP COVER ASSEMBLY and a BASE PLATE FINAL MACHINING—fabricated entirely from AL 6061 aluminum alloy and capable of maintaining a nominal vacuum of 1 x 10³ Torr. Prospective contractors must demonstrate a minimum of eight years of experience in pressure piping and pressure vessel fabrication, with particular emphasis on welding capabilities and quality assurance procedures. Award will be determined on a best value tradeoff basis, evaluating proposals according to past performance and experience, project management capabilities (including pressure and leak testing procedures and manufacturing plans), compliance with instructions, project schedule, JLab-approved welding vendor status, and price. The proposal deadline is April 9, 2026 at 4:30 PM EST, with the solicitation number JSA-26-Q449836.

This solicitation is set aside exclusively for small business concerns under NAICS Code 332710 (size standard of 500 employees). No incumbent contractor is identified in the available documentation. Delivery is required within 120 days of subcontract award, with the work to be completed within 26 weeks after order receipt, and milestone payments authorized at 90 percent upon satisfactory completion of defined milestones. The procurement involves the manufacture of two complete assemblies with associated hardware, leak testing to a maximum rate of 1 x 10⁻⁷ atmcm³/s, and comprehensive documentation deliverables including quality control manuals, manufacturing and welding procedures, and cleaning specifications. The place of performance is Newport News, Virginia 23606, with all shipping costs and risks borne by the subcontractor on a FOB Destination basis per INCOTERMS DAP terms.