ATR Loop Pressurizer Fabrication

The Idaho National Laboratory (INL), under the U.S. Department of Energy, is seeking qualified vendors to fabricate a nuclear‑grade ASME Section VIII, Division 2 stainless‑steel pressure vessel (the ATR Loop Pressurizer) for the Advanced Test Reactor. The contractor will supply all materials, perform full NDE inspection, conduct hydrostatic and load testing, and deliver the completed vessel to WestOne Logistics in Idaho Falls. The work excludes installation, heater procurement, insulation, and any design engineering.