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Title: Gas-phase molybdenum-99 separation from uranium dioxide by fluoride volatility using nitrogen trifluoride

Abstract

Production of the important 99mTc medical isotope parent, molybdenum-99 ( 99Mo), via the fissioning of high- and low-enriched uranium (HEU/LEU) targets followed by target dissolution in acid and solution-phase purification of 99Mo is time-consuming, generates quantities of corrosive radioactive waste, and can result in the release of an array of radionuclides to the atmosphere. An alternative 99Mo purification method has been devised that has the potential to alleviate many of these issues. Herein, we demonstrate the feasibility of a rapid Mo/Tc gas-phase separation from UO 2. The results indicate that volatile [ 99Mo]Mo can be captured downstream of the reacted solid mixture on a column bed (trap) of alumina; the majority of the captured [ 99Mo]Mo can be subsequently eluted from the alumina trap with a few milliliters of water. >1.0 × 10 5 single pass decontamination of U and the collected [ 99Mo]Mo product is demonstrated. This simple thermo-fluorination technique has the potential to provide a rapid methodology for routine 99Mo production.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Flibe Energy, Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1599144
Report Number(s):
[PNNL-SA-148868]
[Journal ID: ISSN 2046-2069; RSCACL]
Grant/Contract Number:  
[AC05-76RL01830]
Resource Type:
Accepted Manuscript
Journal Name:
RSC Advances
Additional Journal Information:
[ Journal Volume: 10; Journal Issue: 6]; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

McNamara, Bruce K., O'Hara, Matthew J., Clark, Richard A., Morrison, Samuel S., Soderquist, Chuck Z., and Scheele, Randall D. Gas-phase molybdenum-99 separation from uranium dioxide by fluoride volatility using nitrogen trifluoride. United States: N. p., 2020. Web. doi:10.1039/C9RA10270A.
McNamara, Bruce K., O'Hara, Matthew J., Clark, Richard A., Morrison, Samuel S., Soderquist, Chuck Z., & Scheele, Randall D. Gas-phase molybdenum-99 separation from uranium dioxide by fluoride volatility using nitrogen trifluoride. United States. doi:10.1039/C9RA10270A.
McNamara, Bruce K., O'Hara, Matthew J., Clark, Richard A., Morrison, Samuel S., Soderquist, Chuck Z., and Scheele, Randall D. Tue . "Gas-phase molybdenum-99 separation from uranium dioxide by fluoride volatility using nitrogen trifluoride". United States. doi:10.1039/C9RA10270A. https://www.osti.gov/servlets/purl/1599144.
@article{osti_1599144,
title = {Gas-phase molybdenum-99 separation from uranium dioxide by fluoride volatility using nitrogen trifluoride},
author = {McNamara, Bruce K. and O'Hara, Matthew J. and Clark, Richard A. and Morrison, Samuel S. and Soderquist, Chuck Z. and Scheele, Randall D.},
abstractNote = {Production of the important 99mTc medical isotope parent, molybdenum-99 (99Mo), via the fissioning of high- and low-enriched uranium (HEU/LEU) targets followed by target dissolution in acid and solution-phase purification of 99Mo is time-consuming, generates quantities of corrosive radioactive waste, and can result in the release of an array of radionuclides to the atmosphere. An alternative 99Mo purification method has been devised that has the potential to alleviate many of these issues. Herein, we demonstrate the feasibility of a rapid Mo/Tc gas-phase separation from UO2. The results indicate that volatile [99Mo]Mo can be captured downstream of the reacted solid mixture on a column bed (trap) of alumina; the majority of the captured [99Mo]Mo can be subsequently eluted from the alumina trap with a few milliliters of water. >1.0 × 105 single pass decontamination of U and the collected [99Mo]Mo product is demonstrated. This simple thermo-fluorination technique has the potential to provide a rapid methodology for routine 99Mo production.},
doi = {10.1039/C9RA10270A},
journal = {RSC Advances},
number = [6],
volume = [10],
place = {United States},
year = {2020},
month = {1}
}

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