Design and performance of the Savannah River Site Billet Active Well coincidence counter (U)

Conference · Tue Jan 01 04:00:00 EST 1991 · Nuclear Materials Management. Annual Meeting Proceedings; (United States)

OSTI ID:5660761

Griffin, J C; Sadowski, E T ^[1]

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1. Westinghouse Savannah River Co., Aiken, SC (US)

The Savannah River Site (SRS) has acquired, installed, and tested a custom-build Billet Active Well (neutron) Coincidence Counter (BAWCC). The bAWCC is used to make accountability measurements of the {sup 235}U content of U-Al co-extrusion billets in the SRS fuel fabrication facility. The instrument design incorporates a unique center-source configuration, with two moderated americium lithium (AmLi) neutron sources located in a central spindle that inserts through the center hole of the U-Al billets. This configuration, a result of earlier experimental studies at SRS, yields improved response and precision for billet assay when compared to the standard AWCC source arrangement. Initial tests of the bAWCC at SRS have yielded one sigma uncertainties of 0.8-1.0% for a fifteen-minute assay. This paper describes the design, testing program, and performance characteristics of the BAWCC.

• OSTI ID: 5660761
• Report Number(s): CONF-910774--
• Conference Information: Journal Name: Nuclear Materials Management. Annual Meeting Proceedings; (United States) Journal Volume: 20
• Country of Publication: United States
• Language: English

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