Request for Information

November 10, 2026
Subject: Request for Information (RFI) No. BZ-2027-01
Response Due Date: November 20, 2026
Introduction
The University of California, Lawrence Berkeley National Laboratory (LBNL) is conducting market research to identify sources capable of fabricating and delivering an external veto tank for the Eos neutrino detector, intended for installation at Oak Ridge National Laboratory. LBNL has developed a preliminary design and welcomes supplier input on materials, fabrication methods, and practical design refinements.
Scope
LBNL seeks information from potential suppliers with the capability to furnish one complete veto tank, including its lid, sealing interfaces, attachment provisions, and associated features. Drawings EOS-E0202 (Eos/SNS proposed arrangement) and EOS-E-0203 (veto tank envelope) provide the preliminary design and key interfaces. These drawings are a starting point. LBNL is open to working iteratively with a supplier to refine the design, provided the functional and interface requirements are preserved. Veto Tank — Technical Requirements and Design Intent
LBNL intends to acquire a tank that meets or exceeds the following specifications. These are preliminary and subject to change.
• Quantity: one (1) external veto tank assembly. The tank envelope, required internal diameter, and required inside height shall follow drawing EOS-E-0203. Dimensions shown for steel construction are reference dimensions.
• Capacity and contents: tank designed to contain approximately 6,250 gallons of pure water under a nitrogen cover gas; water temperature approximately 5–25 °C. • Interior optical finish: irrespective of material or construction method, the tank interior shall be white and have at least 95% reflectivity over the wavelength range 350–500 nm. A metal tank may require a bonded Tyvek liner or other suitable reflective treatment. LBNL’s preference is to have one vendor deliver the tank with the finished interior included, either manufactured entirely in-house or through a collaboration with a lower-tier vendor, but LBNL is willing to consider separate procurements if this is unfeasible.
• Light exclusion: the tank assembly shall be opaque and light-tight, including lid joints, seams, ports, and penetrations.
• Lid and gasket: provide a removable top lid and sealing interface as indicated on EOS-E-0203. Item 5 gasket may be segmented to permit cables to exit from inside the veto tank. Segmentation and gas sealing details remain to be determined. The Eos collaboration will determine the light-tightness