IAEAInternational Atomic Energy Agency
MODARIA II Preliminary Plans for
Working Group 1Assessment and Decision Making of Existing
Exposure Situations for NORM and Nuclear Legacy Sites
Ming Zhu, Ph.D., PE, PMPU.S. Department of Energy, Office of Environmental Management
MODARIA II 1st Technical MeetingVienna, Austria
4 November, 2016
IAEA
Participants• Talal Almahayni Belgium
• Amanda Anderson U.S.A.
• Rodolfo Avila Sweden
• Karine Beaugelin‐Seiller France• Werdi Putra Daeng Beta Indonesia
• Nick Beresford U.K.
• Geert Biermrns Belgium
• Weiya Cheng China
• David Copplestone U.K.
• Eduardo Figueira da Silva Brazil
• Stacey Fernandes Canada
• Dan Galeriu Romania
• Violeta Hansen Denmark
• Diederik Jacques Belgium
• Mathew Johansen Australia
• Daria Koliabina Ukraine
• Branko Kontic Slovenia
• Matthew Kozak U.S.A.
• Nana‐Owesua Kwamena Canada
• Yunxuan Liao China
• Anca Melintescu Romania
• Stephane Pepin Belgium
• Adrian Punt U.K.
• Borut Smodis Slovenia
• Valentin Terziev Bulgaria
• Leena Torpo Finland
• Russell Walke U.K.
• Jeff Whicker U.S.A.
• Mike Wood U.K.
• Tamara Yankovich IAEA
• Charley Yu U.S.A.
• Ming Zhu U.S.A.
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Proposed Objectives of this Working Group
• To further develop radionuclide transport and exposure models, as well as radiological impact assessment approaches, to support decision making for the remediation of NORM and legacy sites.
• To conduct model comparisons using monitoring data, where available.
• To further develop methodologies and toolsets for conducting decision analyses that aid in decision making.
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Problem Definition
• Existing exposure scenarios of NORM and legacy waste sites
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• Develop improved methodologies for radiological impact assessments
• Improve assessment models • Conduct model–model and model–data comparisons
• Apply methodologies to existing sites and facilities
• Train end users (regulators, operators, other stakeholders) on use of NORMALYSA, RESRAD, and other codes
Proposed Tasks – Risk Assessment
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• Develop improved methodologies for radiological impact assessments FEP screening (Expand the FEP List for NORM/legacy sites?)
• Improve assessment models Source terms NORMALYSA, RESRAD, others
• Conduct model–model and model–data comparisons NORMALYSA, RESRAD, PRG, ERICA, others Model‐data comparison for selected sites
• Apply methodologies to existing sites and facilities 4‐5 selected sites
• Visualization of spatial radionuclide distributions at the Andreeva Bay SNF temporary storage facility in Russia To be confirmed
• Train end users (regulators, operators, other stakeholders) on use of codes when they attend MODARIA meetings or through TC NORMALYSA, RESRAD, and others
Proposed Tasks – Risk Assessment
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Processing of phosphate ore for the production of dicalciumphosphate (contamination with Radium)
Tessenderlo Site, Belgium
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Legacy site with tailings and contaminated buildings
C
A
A
D
B
B
E
Pridneprovsky Uranium Legacy Site, Ukraine
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Material Disposal Area B ‐ Los Alamos National Laboratory, USA
• Operated from ~1943‐1948
• Unknown amount of Pu‐239 waste in shallow burial pits
• Goal‐ remediate and release property to public
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Pocos de Caldas U mining and processing facility, Brazil
Flooded Mine Pitat former U Mine
Waste rock pilesat former U Mine
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Proposed Tasks – Decision Analyses
• Develop lists of “prevailing circumstances” and site specific situations
• Develop methodologies and toolsets for formalized decision analysis
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Proposed Tasks – Decision Analyses
• Document decision making process for lessons learned MDA‐B land transfer after completion of cleanup at the LANL site, USA Closure of mine Zirovski vrh, Slovenia Beaverlodge, Canada Chernobyl site, Ukraine?
• Develop lists of “prevailing circumstances” and site specific situations Review non‐nuclear (mining, chemical, oil/gas, construction) best practices List contributing factors that cannot be modelled easily, but need to be considered
in decision making
• Develop methodologies and toolsets for formalized decision analysis Consider application of the DA methodologies to case studies Define end‐state and optimize monitoring program using high‐performance
computing codes Develop structured decision making framework with participation of interested
parties
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Collaborations/Leveraging
• Internal cooperation within the MODARIA II project➢WG 2: Collaboration on remedy selections; Attend each WG’s
IMs; joint meeting at next TM➢WG 5: Members to join the team in running the biota models➢WG 6: Near surface systems; FEPs list
• Internal within the IAEA➢ IAEA TC Chernobyl Remediation Group➢ ICRP Committee 5
• External➢ ASCM & CBP Projects➢ P&RA CoP
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Proposed Interim Meeting
26‐30 June, 2017FANC & SCK‐CENBrussels, Belgium
