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Title: Plutonium Attribute Estimation From Passive NMIS Measurements at VNIIEF

Abstract

Currently, the most relevant application of NMIS for plutonium attribute estimation stems from measurements performed jointly by Oak Ridge National Laboratory (ORNL) and Russian Federal Nuclear Center, All-Russia Scientific Research Institute of Experimental Physics (RFNC-VNIIEF) personnel at RFNC-VNIIEF facilities in Sarov, Russia in June and July 2000. During these measurements at VNIIEF, NMIS was applied in its passive mode to eight unclassified plutonium spherical shells. The shells' properties spanned the following ranges: Composition: {delta}-phase plutonium-metal, constant; Relative {sup 240}Pu-content (f{sub 240Pu}): f{sub 240Pu} = 1.77% (g {sup 240}Pu/g Pu), constant; Inner radius (r{sub 1}): 10.0 mm {le} r{sub 1} {le} 53.5 mm, mean r{sub 1} = 33.5 mm; Outer radius (r{sub 2}): 31.5 mm {le} r{sub 2} {le} 60.0 mm, mean r{sub 2} = 46.6 mm; Radial thickness ({Delta}r): 6.4 mm {le} {Delta}r {le} 30.2 mm, mean {Delta}r = 13.1 mm; and Plutonium mass (m{sub Pu}): 1829 g {le} m{sub Pu} {le} 4468 g, mean m{sub Pu} = 3265 g. The features of these measurements were analyzed to extract the attributes of each plutonium shell. Given that the samples measured were of constant composition, geometry, and relative {sup 240}Pu-content, each shell is completely described by any two of the followingmore » four properties: Inner radius r{sub 1}; Outer radius r{sub 2}; Mass m, one of {sup 239}Pu mass m{sub {sup 239}Pu}, {sup 240}Pu mass m{sub {sup 240}Pu}, or total Pu mass m{sub Pu}; and Radial thickness {Delta}r. Of these, generally only mass is acknowledged as an attribute of interest; the second property (whichever is chosen) can be considered to be a parameter of the attribute-estimation procedure, much as multiplication is a parameter necessary to accurately estimate fissile mass via most neutron measurements.« less

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
814039
Report Number(s):
ORNL/TM-2002/20
TRN: US0303979
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 17 Jan 2002
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; GEOMETRY; NEUTRONS; ORNL; PERSONNEL; PHYSICS; PLUTONIUM; THICKNESS

Citation Formats

Mattingly, J K. Plutonium Attribute Estimation From Passive NMIS Measurements at VNIIEF. United States: N. p., 2002. Web. doi:10.2172/814039.
Mattingly, J K. Plutonium Attribute Estimation From Passive NMIS Measurements at VNIIEF. United States. https://doi.org/10.2172/814039
Mattingly, J K. 2002. "Plutonium Attribute Estimation From Passive NMIS Measurements at VNIIEF". United States. https://doi.org/10.2172/814039. https://www.osti.gov/servlets/purl/814039.
@article{osti_814039,
title = {Plutonium Attribute Estimation From Passive NMIS Measurements at VNIIEF},
author = {Mattingly, J K},
abstractNote = {Currently, the most relevant application of NMIS for plutonium attribute estimation stems from measurements performed jointly by Oak Ridge National Laboratory (ORNL) and Russian Federal Nuclear Center, All-Russia Scientific Research Institute of Experimental Physics (RFNC-VNIIEF) personnel at RFNC-VNIIEF facilities in Sarov, Russia in June and July 2000. During these measurements at VNIIEF, NMIS was applied in its passive mode to eight unclassified plutonium spherical shells. The shells' properties spanned the following ranges: Composition: {delta}-phase plutonium-metal, constant; Relative {sup 240}Pu-content (f{sub 240Pu}): f{sub 240Pu} = 1.77% (g {sup 240}Pu/g Pu), constant; Inner radius (r{sub 1}): 10.0 mm {le} r{sub 1} {le} 53.5 mm, mean r{sub 1} = 33.5 mm; Outer radius (r{sub 2}): 31.5 mm {le} r{sub 2} {le} 60.0 mm, mean r{sub 2} = 46.6 mm; Radial thickness ({Delta}r): 6.4 mm {le} {Delta}r {le} 30.2 mm, mean {Delta}r = 13.1 mm; and Plutonium mass (m{sub Pu}): 1829 g {le} m{sub Pu} {le} 4468 g, mean m{sub Pu} = 3265 g. The features of these measurements were analyzed to extract the attributes of each plutonium shell. Given that the samples measured were of constant composition, geometry, and relative {sup 240}Pu-content, each shell is completely described by any two of the following four properties: Inner radius r{sub 1}; Outer radius r{sub 2}; Mass m, one of {sup 239}Pu mass m{sub {sup 239}Pu}, {sup 240}Pu mass m{sub {sup 240}Pu}, or total Pu mass m{sub Pu}; and Radial thickness {Delta}r. Of these, generally only mass is acknowledged as an attribute of interest; the second property (whichever is chosen) can be considered to be a parameter of the attribute-estimation procedure, much as multiplication is a parameter necessary to accurately estimate fissile mass via most neutron measurements.},
doi = {10.2172/814039},
url = {https://www.osti.gov/biblio/814039}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 17 00:00:00 EST 2002},
month = {Thu Jan 17 00:00:00 EST 2002}
}