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Title: Addressing as low as reasonably achievable (ALARA) issues: investigation of worker collective external and extremity dose data

Plutonium emits both neutrons and photons and when it is stored or handled inside a glovebox, both photons and neutrons are significant external radiation hazards. Doses to the extremities are usually dominated by gamma radiation in typical plutonium glovebox operations. Excess external dose can generates stochastic effects consisting of cancer and benign tumors in some organs. Direct doses from radiation sources external to the body are measured by thermoluminescent dosimeters (TLDs) placed on the glovebox worker between the neck and waist. Wrist dosimeters are used to assess externally penetrating radiation including neutrons and provide an estimate of neutron radiation exposure to the extremities. Both TLDs and wrist dosimeters are processed monthly for most glovebox workers. Here, worker collective extremity and external dose data have been analyzed to prevent and mitigate external radiation events through the use of Lean Manufacturing and Six Sigma business practices (LSS). Employing LSS, statistically significant variations (trends) are identified in worker collective extremity and external dose data. Finally, the research results presented in this paper are pivotal to the ultimate focus of this program, which is to minimize external radiation events.
Authors:
 [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-21440
Journal ID: ISSN 1871-5532
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Health and Safety
Additional Journal Information:
Journal Volume: 24; Journal Issue: 5; Journal ID: ISSN 1871-5532
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; Plutonium; neutron; photon; dose; extremity; external; LSS; trends; output metric; control chart
OSTI Identifier:
1351236

Cournoyer, Michael Edward, Costigan, Stephen Andrew, and Schreiber, Stephen Bruce. Addressing as low as reasonably achievable (ALARA) issues: investigation of worker collective external and extremity dose data. United States: N. p., Web. doi:10.1016/j.jchas.2017.03.003.
Cournoyer, Michael Edward, Costigan, Stephen Andrew, & Schreiber, Stephen Bruce. Addressing as low as reasonably achievable (ALARA) issues: investigation of worker collective external and extremity dose data. United States. doi:10.1016/j.jchas.2017.03.003.
Cournoyer, Michael Edward, Costigan, Stephen Andrew, and Schreiber, Stephen Bruce. 2017. "Addressing as low as reasonably achievable (ALARA) issues: investigation of worker collective external and extremity dose data". United States. doi:10.1016/j.jchas.2017.03.003. https://www.osti.gov/servlets/purl/1351236.
@article{osti_1351236,
title = {Addressing as low as reasonably achievable (ALARA) issues: investigation of worker collective external and extremity dose data},
author = {Cournoyer, Michael Edward and Costigan, Stephen Andrew and Schreiber, Stephen Bruce},
abstractNote = {Plutonium emits both neutrons and photons and when it is stored or handled inside a glovebox, both photons and neutrons are significant external radiation hazards. Doses to the extremities are usually dominated by gamma radiation in typical plutonium glovebox operations. Excess external dose can generates stochastic effects consisting of cancer and benign tumors in some organs. Direct doses from radiation sources external to the body are measured by thermoluminescent dosimeters (TLDs) placed on the glovebox worker between the neck and waist. Wrist dosimeters are used to assess externally penetrating radiation including neutrons and provide an estimate of neutron radiation exposure to the extremities. Both TLDs and wrist dosimeters are processed monthly for most glovebox workers. Here, worker collective extremity and external dose data have been analyzed to prevent and mitigate external radiation events through the use of Lean Manufacturing and Six Sigma business practices (LSS). Employing LSS, statistically significant variations (trends) are identified in worker collective extremity and external dose data. Finally, the research results presented in this paper are pivotal to the ultimate focus of this program, which is to minimize external radiation events.},
doi = {10.1016/j.jchas.2017.03.003},
journal = {Journal of Chemical Health and Safety},
number = 5,
volume = 24,
place = {United States},
year = {2017},
month = {3}
}