# SAM #BZ-2027-01

Market research for a 6,250-gallon Eos detector veto tank assembly

**Buyer:** LBNL
**Posted:** November 11, 2026
**Respond By:** November 20, 2026
**Identifier:** BZ-2027-01
**NAICS:** 332420

Lawrence Berkeley National Laboratory is seeking supplier input on a custom water tank assembly for the Eos neutrino detector at Oak Ridge National Laboratory.
- **Government buyer and project**
  - U.S. Department of Energy; University of California, Lawrence Berkeley National Laboratory (LBNL) Procurement is conducting the market research.
  - The tank is for the Eos project at Oak Ridge National Laboratory’s Spallation Neutron Source (SNS).
- **Product requested**
  - One external veto tank assembly, approximately 6,250 gallons, surrounding the existing EOS tank and detectors; fabrication and delivery are requested.
  - Drawing references: EOS-E-0202 and EOS-E-0203. The firm tank dimensions are specified in the drawings; the envelope drawing notes a 147.38-inch tank inside diameter. No product part number is provided.
- **Key requirements and design considerations**
  - The tank must support the water-filled EOS tank load of 51,858 lb through its bottom to the SNS Hall floor, and meet seismic requirements for Oak Ridge, Tennessee, with suitable floor anchorage and interfaces.
  - It must contain pure water under nitrogen cover gas, be gas-tight, opaque, and light-tight, and have a white interior with at least 95% reflectivity over 350–500 nm.
  - Carbon steel construction is to meet ANSI/AWWA D100-21; stainless steel 304 is shown on a drawing, while final material remains open. Suppliers are asked to assess FRP fiberglass or an equivalent lower-cost option and applicable material codes.
  - The lid needs gas and water connections and access ports. Gasket segmentation and cable-sealing details, photomultiplier-tube support features, and some other design details remain to be finalized. Lifting points must suit the selected material.
- **Companies and suppliers mentioned**
  - **No tank manufacturer or fabricator is identified.** Bartoszek Engineering is named on the envelope drawing; the procurement materials do not identify it as the tank manufacturer.
  - **OEMs:** None specified.

### Description

<p>Lawrence Berkeley National Laboratory is conducting market research to identify sources capable of fabricating and delivering an external veto tank for the Eos neutrino detector. LBNL has developed a preliminary design and welcomes supplier input on materials, fabrication methods, and practical design refinements.</p>

<p>Please see the attached RFI document and drawings for details and instructions.</p>
<br/><br/><br/><strong>Additional Links:</strong><br/><a href='https://nuclearscience.lbl.gov/research/research-programs/neutrinos/neutrinos-research/neutrino-detection-for-science-and-nonproliferation/neutrino-detection-for-science-and-nonproliferation-research/eos/' target='_blank'>Eos at LBNL</a>

[View original listing](https://sam.gov/opp/b174fb65f230494ca1ef1b402940e27e/view)