Uranium and plutonium solution assays by transmission-corrected x-ray fluorescence

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We have refined and tested a previously developed x-ray fluorescence analysis technique for uranium and plutonium solutions that compensates for variations in the absorption of the exciting gamma rays and fluorescent x-rays. We use {sup 57}Co to efficiently excite the K lines of the elements, and a mixed {sup 57}Co plus {sup 153}Gd transmission source to correct for variations in absorption. The absorption correction is a unique feature of our technique. It is possible to accurately calibrate the system with a single solution standard. There does not need to be a close match in composition (i.e., absorption) between the standard(s) ... continued below

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186 Kilobytes pages

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Ryon, R W; Ruhter, W D; Rudenko, V; Sirontinin, A & Petrov, A A September 8, 1999.

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We have refined and tested a previously developed x-ray fluorescence analysis technique for uranium and plutonium solutions that compensates for variations in the absorption of the exciting gamma rays and fluorescent x-rays. We use {sup 57}Co to efficiently excite the K lines of the elements, and a mixed {sup 57}Co plus {sup 153}Gd transmission source to correct for variations in absorption. The absorption correction is a unique feature of our technique. It is possible to accurately calibrate the system with a single solution standard. There does not need to be a close match in composition (i.e., absorption) between the standard(s) and solutions to be analyzed. Specially designed equipment incorporates a planar intrinsic germanium detector, excitation and transmission radioisotopes, and specimen holder. The apparatus can be inserted into a rubber glove of a glovebox, keeping the apparatus outside and the solutions inside the glovebox, thereby protecting the user and the equipment from possible contamination. An alternate design may be used in chemical reprocessing plants, providing continuous monitoring, by measuring the trans-actinides through stainless steel piping. This technique has been tested at the Bochvar Research Institute of Inorganic Materials in Moscow for possible use in the Russian complex of nuclear facilities. This is part of a cooperative program between laboratories in the United States and Russia to strengthen systems of nuclear materials protection, control, and accountability (MPC and A). A part of this program is to accurately measure and track inventories of materials, thus the need for good non-destructive analytical techniques such as the one described here.

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186 Kilobytes pages

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  • 6th International Conference on Facility Operations - Safeguards Interface, Jackson Hole, WY (US), 09/20/1999--09/24/1999

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  • Report No.: UCRL-JC-130094--Rev-1
  • Report No.: GJ0800000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14872
  • Archival Resource Key: ark:/67531/metadc619407

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  • September 8, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 2:09 p.m.

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Ryon, R W; Ruhter, W D; Rudenko, V; Sirontinin, A & Petrov, A A. Uranium and plutonium solution assays by transmission-corrected x-ray fluorescence, article, September 8, 1999; California. (digital.library.unt.edu/ark:/67531/metadc619407/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.