# SAM #PR452359 ORNL dilution refrigerator system with two He3/He4 inserts **Buyer:** UT-Battelle **Posted:** October 19, 2026 **Respond By:** November 09, 2026 **Identifier:** PR452359 **NAICS:** 333415, 423740, 334516 Oak Ridge National Laboratory is seeking a complete dilution refrigerator system for its Neutron Scattering Division. - **Government buyer:** U.S. Department of Energy; Oak Ridge National Laboratory (ORNL), Procurement. ORNL is managed and operated by UT-Battelle, LLC. The solicitation identifies Bill Mitchum as the procurement contact. - **OEMs and named companies:** **Lakeshore** is specified for the 372 AC Resistance Bridge controller and 16-channel scanner. No manufacturer is identified for the dilution refrigerator system. UT-Battelle, LLC is named as ORNL’s managing and operating contractor. - **Requested equipment:** One Gas Handling System Refrigerator and two identical He3/He4 dilution refrigerator inserts. Also includes one Lakeshore 372 AC Resistance Bridge controller, one Lakeshore 16-channel scanner, and one external liquid-nitrogen cold trap and dewar. Two larger-sample-space IVC vacuum cans are optional and must be priced separately. - **Key performance and fit requirements:** Inserts must achieve 30 mK base temperature, provide 40 W cooling power at 100 mK, and reach base temperature within two hours after mixture condensation begins. They must operate from 30 mK to 1.5 K with 5% temperature control and stability, and be compatible with ORNL’s existing gas-handling and host systems. The system includes autonomous controls and specified sensors, heaters, wiring, gauges, vacuum cans, pumps, and hoses; the seller must provide control-system source code. - **Testing and delivery:** Factory and ORNL site acceptance testing include cryogenic performance checks, vacuum leak checks below 1E-7 mBar-L/Sec, and at least 48 hours of continuous operation at base temperature. Delivery is required within 12 months after receipt of order. Quality requirements include calibration certification, product documentation, manuals, safe shipping, witnessed seller-site testing, and software quality assurance. ### Description

Request for Proposal: RFP No. PR452359 Dilution Refrigeration Systems
 
Oak Ridge National Laboratory (ORNL), managed by UT-Battelle for the US Department of Energy, is inviting you to submit a Firm Fixed Price proposal for the following item listed below. An award will be made based on the lowest priced, technically acceptable proposal.
 
Summary of Work/Description of Items: 
A dilution refrigerator system consisting of a Gas Handling System Refrigerator and two identical He3/He4 dilution inserts as specified and in accordance with the attached RFP documents.

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