Performance of NDA techniques on a vitrified waste form [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy, 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: 9 pages : digital, PDF file
Additional Creators: Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

Rocky Flats Environmental Technology Site (RFETS) is currently considering the use of vitrified transuranic (TRU)-waste forms for the final disposition of several waste materials. To date, however, little nondestructive assay (NDA) data have been acquired in the general NDA community to assist in this endeavor. This paper describes the efforts to determine constraints and operating parameters for using NDA instrumentation on vitrified waste. The present study was conducted on a sample composed of a plutonium-contaminated ash, similar to that found in the RFETS inventory, and a borosilicate-based glass. The vitrified waste item was fabricated at Los Alamos National Laboratory (LANL) using methods and equipment similar to those being proposed by RFETS to treat their ash material. The focus of this study centered on the segmented gamma scanner (SGS) with 1/2-inch collimation, a technique that is presently available at RFETS. The accuracy and precision of SGS technology was evaluated, with particular attention to bias issues involving matrix geometry, homogeneity, and attenuation. Tomographic gamma scanning was utilized in the determination of the waste form homogeneity. A thermal neutron technique was also investigated and comparisons made with the gamma results.

Report Numbers

E 1.99:la-ur--97-2741
E 1.99: conf-970744--
conf-970744--
la-ur--97-2741

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Note

Published through SciTech Connect.
11/01/1997.
"la-ur--97-2741"
" conf-970744--"
"DE98001014"
38. annual meeting of the Institute of Nuclear Materials management, Phoenix, AZ (US), 07/20/1997--07/24/1997.
Mercer, D.J.; Prettyman, T.H.; Hurd, J.R.; Ricketts, T.E.; Nakaoka, R.K.; Veazey, G.W.

Funding Information

W-7405-ENG-36

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