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Title: NEUTRON ACTIVATION ANLYSIS OF AEROSOLIZED SODIUM CHLORIDE TO SIMULATE SIZE FRACTIONATION OF PLUTONIUM IN A GLOVEBOX

Authors:
 [1];  [2];  [2]
  1. Los Alamos National Laboratory
  2. NON LANL
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1068205
Report Number(s):
LA-UR-06-2365
DOE Contract Number:
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
55

Citation Formats

OLSON, CHERYL L., LANDSBERGER, SHELDON, and BRAISTED, JON. NEUTRON ACTIVATION ANLYSIS OF AEROSOLIZED SODIUM CHLORIDE TO SIMULATE SIZE FRACTIONATION OF PLUTONIUM IN A GLOVEBOX. United States: N. p., 2006. Web. doi:10.2172/1068205.
OLSON, CHERYL L., LANDSBERGER, SHELDON, & BRAISTED, JON. NEUTRON ACTIVATION ANLYSIS OF AEROSOLIZED SODIUM CHLORIDE TO SIMULATE SIZE FRACTIONATION OF PLUTONIUM IN A GLOVEBOX. United States. doi:10.2172/1068205.
OLSON, CHERYL L., LANDSBERGER, SHELDON, and BRAISTED, JON. Thu . "NEUTRON ACTIVATION ANLYSIS OF AEROSOLIZED SODIUM CHLORIDE TO SIMULATE SIZE FRACTIONATION OF PLUTONIUM IN A GLOVEBOX". United States. doi:10.2172/1068205. https://www.osti.gov/servlets/purl/1068205.
@article{osti_1068205,
title = {NEUTRON ACTIVATION ANLYSIS OF AEROSOLIZED SODIUM CHLORIDE TO SIMULATE SIZE FRACTIONATION OF PLUTONIUM IN A GLOVEBOX},
author = {OLSON, CHERYL L. and LANDSBERGER, SHELDON and BRAISTED, JON},
abstractNote = {},
doi = {10.2172/1068205},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 30 00:00:00 EST 2006},
month = {Thu Mar 30 00:00:00 EST 2006}
}

Technical Report:

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  • Characterization of glovebox atmospheres and the black reaction product formed on plutonium surfaces shows that the abnormally rapid corrosion of components in the fabrication line is consistent with a complex salt-catalyzed reaction involving gaseous hydrogen chloride (HCl) and water. Analytical data verify that chlorocarbon and HCl vapors are presented in stagnant glovebox atmospheres. Hydrogen chloride concentrations approach 7 ppm at some locations in the glovebox line. The black corrosion product is identified as plutonium monoxide monohydride (PuOH), a product formed by hydrolysis of plutonium in liquid water and salt solutions at room temperature. Plutonium trichloride (PuCl{sub 3}) produced by reactionmore » of HCl at the metal surface is deliquescent and apparently forms a highly concentrated salt solution by absorbing moisture from the glovebox atmosphere. Rapid corrosion is attributed to the ensuing salt-catalyzed reaction between plutonium and water. Experimental results are discussed, possible involvement of hydrogen fluoride (HF) is examined, and methods of corrective action are presented in this report.« less
  • Internal combustion engines are a major source of airborne particulate matter (PM). The size of the engine PM is in the sub-micrometer range. The number of engine particles per unit volume is high, normally in the range of 10{sup 12} to 10{sup 14}. To measure the size distribution of the engine particles dilution of an aerosol sample is required. A diluter utilizing a venturi ejector mixing technique is commercially available and tested. The purpose of this investigation was to determine if turbulence created by the ejector in the mini-dilutor changes the size of particles passing through it.
  • Internal combustion engines are a major source of airborne particulate matter (PM). The size of the engine PM is in the sub-micrometer range. The number of engine particles per unit volume is high, normally in the range of 10{sup 12} to 10{sup 14}. To measure the size distribution of the engine particles dilution of an aerosol sample is required. A diluter utilizing a venturi ejector mixing technique is commercially available and tested. The purpose of this investigation was to determine if turbulence created by the ejector in the mini-dilutor changes the size of particles passing through it. The results ofmore » the NaCl aerosol experiments show no discernible difference in the geometric mean diameter and geometric standard deviation of particles passing through the ejector. Similar results were found for the DOP particles. The ratio of the total number concentrations before and after the ejector indicates that a dilution ratio of approximately 20 applies equally for DOP and NaCl particles. This indicates the dilution capability of the ejector is not affected by the particle composition. The statistical analysis results of the first and second moments of a distribution indicate that the ejector may not change the major parameters (e.g., the geometric mean diameter and geometric standard deviation) characterizing the size distributions of NaCl and DOP particles. However, when the skewness was examined, it indicates that the ejector modifies the particle size distribution significantly. The ejector could change the skewness of the distribution in an unpredictable and inconsistent manner. Furthermore, when the variability of particle counts in individual size ranges as a result of the ejector is examined, one finds that the variability is greater for DOP particles in the size range of 40-150 nm than for NaCl particles in the size range of 30 to 350 nm. The numbers or particle counts in this size region are high enough that the Poisson counting errors are small (<10%) compared with the tail regions. This result shows that the ejector device could have a higher bin-to-bin counting uncertainty for ''soft'' particles such as DOP than for a solid dry particle like NaCl. The results suggest that it may be difficult to precisely characterize the size distribution of particles ejected from the mini-dilution system if the particle is not solid.« less