WAM-E - Special Session: Aerosols and Nanotechnology Orange B 08:15 - 12:00
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| Chair(s): Jeff Whicker, Mark Hoover
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WAM-E.1
08:15 Aerosol Science Advances and Challenges in Radiation Protection: Thirty Years of Experience and Insights from the Air Monitoring Users Group MD Hoover*, Mark D Hoover LLC
; JJ Whicker, Los Alamos National Laboratory; RB Hayes, North Carolina State University; ML Maiello, New York City Department of Health; P Jenkins, Bowser-Morner, Inc.; M Cox, Consultant
Abstract: A major mission of the radiation protection community is to ensure the understanding, communication, and management of risks to workers, members of the public, and the environment from exposures to airborne radioactive materials. This is an ongoing challenge that requires awareness and response to changing technologies and regulatory requirements. Since its formation 30 years ago, the Air Monitoring Users Group has provided a robust forum for sharing aerosol science experience, expertise, and advances, including development of the textbook on Radioactive Air Sampling Methods. This presentation from AMUG members will highlight radioactive aerosol science topics including sampler placement strategies, filter performance, particle behavior, flow behavior and calibration, real-time monitoring, health and safety practices, exposure assessment, and dosimetry.
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WAM-E.2
09:15 Nanotechnology and Radiation Protection: HPS Nanotechnology Committee Activities and Opportunities MD Hoover*, Mark D Hoover LLC
; L Marceau-Day, LSU Scientist Emerita; LJ Cash, Los Alamos National Laboratory; J Davis, Oak Ridge Associated Universities; T Hay, Washington State Department of Health; S Holiday, Nuclear Regulatory Commission; JJ Whicker, Los Alamos National Laboratory
Abstract: This panel discussion in the special technical session on Radioactive Aerosols and Nanotechnology will provide HPS members with the opportunity to hear key updates and participate in open discussions with members of the HPS Nanotechnology Committee and the audience. The session supports the Committees mission to ensure our Societys role as the source of expertise in radiation safety for existing and emerging nanotechnologies. Opportunities where the HPS and its members can and are providing important local, national and global leadership on emerging technology-related issues include providing input and support to HPS sections, HPS committees, and local chapters; fostering education and training programs for members and partner organizations; and collaboration with key partners such as DOE, EPA, ICRP, IAEA, NCRP, NIOSH, NIST, NRC, OSHA, and the National Nanotechnology Coordination Office. This will be the 11th consecutive annual meeting nanotechnology special session.
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WAM-E.3
10:15 Measuring Air Sampler Filter Material For Pressure Drop, Aerosol Collection Efficiency, Alpha Spectrum Resolution And Radon Progeny Collection LAUR-19-21686 ME Moore*, Los Alamos National Laboratory
; Y Tao, Los Alamos National Laboratory; TD McLean, Los Alamos National Laboratory; JT Voss, Los Alamos National Laboratory; JA Stephens, Pacific Northwest National Laboratory; CT Simpson, Los Alamos National Laboratory
Abstract: The Los Alamos National Laboratory and Pacific Northwest National Laboratory use various filters in air sampling applications for airborne radioactive alpha-emitting materials. The different types include (1) Millipore FMLW 5.0 micrometer, (2) Millipore SMWP 5.0 micrometer, (3) Millipore RW19 0.5 micrometer, (4) Millipore FSLW 3.0 micrometer, (5) IW Tremont RB5211, (6) Hollingsworth and Vose HD2061, (7) Bladewerx 1.5, (8) Bladewerx 5.0 and (9) HI-Q FP5300XX filters.
This work generally follows a format from the Inhalation Toxicology Research Institute (Albuquerque NM) to measure (1) the filter pressure drop at representative flowrates, (2) the filter collection efficiency for 0.3 micrometer diameter particulates, and the FWHM (full width half maximum, keV) of the alpha energy spectrum of naturally occurring radon progeny. Measurements also determined the effect of operating composite filters on their support scrim side or on their membrane side.
This work is intended to supplement ANSI/HPS N13.1 Sampling and Monitoring Releases of Airborne Radioactive Substances from the Stacks and Ducts of Nuclear Facilities and ANSI/HPS 42.54 Instrumentation and Systems for Monitoring Airborne Radioactivity. To the knowledge of the investigators, the experimental methods in this work have not been described in a unified technical standard. The finished project will describe (1) the experimental process, (2) the items tested, and (3) recommendations for filter evaluations and development.
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WAM-E.4
10:35 Health Physics Society rules governing formation of a proposed new Aerosols/Emerging Technologies Section JJ Whicker*, Los Alamos National Laboratory
; MD Hoover, Mark Hoover, LLC
Abstract: The Health Physics Societys Nanotechnology Committee was formed to investigate and provide recommendations for radiological protection for radioactive nanoparticles. This committee produced numerous scientific presentations, manuscripts, and the work culminated in National Council on Radiation Protection and Measurements Report No. 176, Radiation Safety Aspects of Nanotechnology. The Board of Directors is encouraging the continuing work of this committee by proposing a transition from a task-driven, short-term technical committee to a section. Given common themes between radioactive nanoparticles and larger aerosols more commonly encountered in workplaces, a proposal to create a section combining radioactive aerosols and related aspects of emerging technologies, including nanoparticles was proposed. This presentation will discuss the rationale and rules regarding the creation of a new section contained in the Bylaws of the Health Physics Society, including how HPS members can become involved in supporting the formation of the proposed new section.
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