Cryo SNS Cold Box Shell Analysis

The Thomas Jefferson National Accelerator Facility (TJNAF) is seeking professional engineering services to perform a stress analysis and validate the design of a sub-atmospheric cold box vacuum vessel for the Spallation Neutron Source (SNS) Replacement 2K Cold Box project. The selected contractor must use the finite element method (FEM) to demonstrate that the design complies with ASME Boiler and Pressure Vessel Code, Section VIII, Division 2, Part 5. Key deliverables include a validated engineering analysis that identifies non-compliant conditions and recommends corrective adjustments, along with comprehensive technical documentation covering modeling assumptions, boundary conditions, material properties, and stress evaluations. The system analysis must be completed by December 18, 2026. This procurement is a total small business set-aside under NAICS code 541330 and will be awarded as a firm fixed price subcontract. The selection process follows a best-value tradeoff methodology, where technical capability and lead time are given primary emphasis over price. Technical acceptability is required, and past performance may be decisive in close comparisons. The intent is to award the contract by September 30, 2026. Proposals must be submitted electronically and include a price proposal, technical documentation of design capabilities, and at least three references for comparable work. The contract is administered by Dena Drye, with payment terms set at net 30 days.