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Title: A case study in plutonium radiochronometry using multiple isotope systems

Abstract

In this work, radiochronometry analyses of two Pu metals were performed using the 237Np– 241Am– 241Pu, 234U– 238Pu, 235U– 239Pu, and 236U–240Pu decay series. For one sample, all radiochronometers yield concordant model dates in 1959–1960, suggesting that the aqueous processing method used to purify Pu effectively removed U, Am and Np decay products from the bulk Pu. The second sample yields discordant model dates that are also older than the known production date in 1982. The excess U, Am and Np present in the sample imply that the sample was purified during at least two different episodes, using a combination of aqueous methods and molten salt extraction.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1530674
Report Number(s):
LLNL-JRNL-748960
Journal ID: ISSN 0236-5731; 933954
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Volume: 318; Journal Issue: 1; Journal ID: ISSN 0236-5731
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Plutonium; Radiochronometry; Mass spectrometry; Actinide decay series; Nuclear forensics

Citation Formats

Gaffney, Amy M., Wimpenny, Josh B. N., Parsons-Davis, Tashi, Williams, Ross W., Torres, Richard A., and Chung, Brandon W. A case study in plutonium radiochronometry using multiple isotope systems. United States: N. p., 2018. Web. doi:10.1007/s10967-018-6131-7.
Gaffney, Amy M., Wimpenny, Josh B. N., Parsons-Davis, Tashi, Williams, Ross W., Torres, Richard A., & Chung, Brandon W. A case study in plutonium radiochronometry using multiple isotope systems. United States. doi:10.1007/s10967-018-6131-7.
Gaffney, Amy M., Wimpenny, Josh B. N., Parsons-Davis, Tashi, Williams, Ross W., Torres, Richard A., and Chung, Brandon W. Sat . "A case study in plutonium radiochronometry using multiple isotope systems". United States. doi:10.1007/s10967-018-6131-7. https://www.osti.gov/servlets/purl/1530674.
@article{osti_1530674,
title = {A case study in plutonium radiochronometry using multiple isotope systems},
author = {Gaffney, Amy M. and Wimpenny, Josh B. N. and Parsons-Davis, Tashi and Williams, Ross W. and Torres, Richard A. and Chung, Brandon W.},
abstractNote = {In this work, radiochronometry analyses of two Pu metals were performed using the 237Np–241Am–241Pu, 234U–238Pu, 235U–239Pu, and 236U–240Pu decay series. For one sample, all radiochronometers yield concordant model dates in 1959–1960, suggesting that the aqueous processing method used to purify Pu effectively removed U, Am and Np decay products from the bulk Pu. The second sample yields discordant model dates that are also older than the known production date in 1982. The excess U, Am and Np present in the sample imply that the sample was purified during at least two different episodes, using a combination of aqueous methods and molten salt extraction.},
doi = {10.1007/s10967-018-6131-7},
journal = {Journal of Radioanalytical and Nuclear Chemistry},
number = 1,
volume = 318,
place = {United States},
year = {2018},
month = {8}
}

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