Fabricating defensible reference standards for the NDA lab [electronic resource].

Published: Idaho Falls, Idaho : Lockheed Idaho Technologies Company, 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: pages 493-498 : digital, PDF file
Additional Creators: Lockheed Idaho Technologies Company and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

Nondestructive analysis (NDA) is performed at the Oak Ridge Y-12 Plant in support of the enriched uranium operations. Process materials are analyzed using gamma ray- and neutron-based instruments including segmented gamma scanners, solution assay systems, and an active well coincidence counter. Process wastes are also discarded based on results of these measurements. Good analytical practice, as well as applicable regulations, mandates that these analytical methods be calibrated using reference materials traceable to the national standards base. Reference standards for NDA instruments are not commercially available owing to the large quantities of special nuclear materials involved. Instead, representative materials are selected from each process stream, then thoroughly characterized by methods that are traceable to the national standards base. This paper discusses the process materials to be analyzed, reference materials selected for calibrating each NDA instrument, and details of their characterization and fabrication into working calibrations standards. Example calibration curves are also presented. 4 figs.

Report Numbers

E 1.99:conf-970126--
conf-970126--

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Note

Published through SciTech Connect.
11/01/1997.
"conf-970126--"
"DE97052960"
5. nondestructive assay/nondestructive examination waste characterization conference, Salt Lake City, UT (United States), 14-16 Jan 1997.
Ceo, R.N.; May, P.K.

Funding Information

AC05-84OR21400

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