Eos Veto Water Tank (6250 gallons)

Lawrence Berkeley National Laboratory, a Department of Energy laboratory, is conducting market research to identify sources capable of fabricating and delivering one complete external veto tank for the Eos neutrino detector, with responses due by 2:00 PM Pacific on November 20, 2026. No set-aside is used. The RFI is for informational purposes only: no award will result, responses are not offers, and the Buy American Act applies to any resulting procurement, requiring domestic end products unless specific exceptions apply. Installation occurs at Oak Ridge National Laboratory.

The tank requires approximately 6,250-gallon capacity to contain pure water at 5-25 C under nitrogen cover gas. The interior must be white with at least 95% reflectivity across the 350-500 nm wavelength range, achievable through a bonded Tyvek liner or equivalent treatment for metal construction. The tank must be completely light-tight, including lid joints, seams, ports, and penetrations. It requires a removable top lid with a segmented gasket to permit cable exits. Construction is carbon steel meeting ANSI/AWWA D100-21 or equivalent applicable codes for alternative materials. Structural design must address seismic conditions at Oak Ridge per ASCE 7-10, with floor anchorage brackets.

LBNL's preliminary design, documented in drawings EOS-E-0202 and EOS-E-0203, serves as the starting point, and LBNL is open to iterative design refinement provided functional and interface requirements are preserved. The anticipated NAICS code is 332420 with a small business size standard of 750 or fewer employees, and the PSC is 5430. Interested vendors must submit company information, proposed materials and fabrication methods, past performance and quality procedures, and delivery timeframe estimates by email to Brian Zatkow at bzatkow@lbl.gov.