IAEAInternational Atomic Energy Agency

Summary of MODARIA II WG1 Status

Ming Zhu, Ph.D., PE, PMP, F. ASCEU.S. Department of Energy

MODARIA II TM3

Vienna, Austria

25 October 2018

IAEA

WG1 Sessions Attendance @ TM3

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WG1 IAEA Scientific Secretary: Tamara YankovichWG1 Leader: Ming Zhu (USA)

16 (33*) Participants

9 (19*) Member states

* (including joint sessions)

IAEA

Work Scope

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WG 1: Assessment and Decision Making of Existing Exposure Situations for NORM and Nuclear Legacy Sites

– Methods and tools for radiological impact assessments and application to specific situations

– Methodologies for decision analyses for remediation and closure of NORM and legacy sites

– Communication and engagement with relevant interested parties

– Training for end users for the use of the relevant software

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Sites Selected for Case Studies

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Tessenderlo Phosphate Processing SiteBelgium

Zapadnoe Uranium Mill Tailings SiteUkraine

Former Tin Processing SiteBrazil

Grote Laak

Winterbeek

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Work Performed This Week

5

– Training session by Daria Koliabina on “NORMALYSA Tool for Safety Assessment and Uranium Residues Management”.

– Updates of model-model/data comparisons for the Case Studies for the Tenssenderlo Chemie Phosphase Processing Site, the Zapadnoe Uranium Tailing Site, and the Brazil Tin Processing Site.

– Presentation by Daria Koliabina on “Update on the ZapadnoeMill Tailings Site Case Study”.

– Joint Session with the LeTrench Project Team, to share program and discuss opportunities for leveraging/collaboration.

– Presentation by Danyl Pérez-Sánchez on “Spanish Huelva Site case study of long-lasting NORM exposure situation: Analysis of Social Impact and stakeholder involvement”.

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Work Performed This Week (ctd)

6

– Presentation by . Joël Rajaobelison on “Case Study of Legacy Vatovory Uranium Mining Site And Its Surroundings (Madagascar): Public Exposure Due to Natural Radioactivity using Direct and Indirect Methods”.

– Joint Session with the WG4 Kd Team on requirements for Kd

data in WG1 case studies and Alternative Models to the Kd

approach.

– Reviews and Updates of Chapters 2-8 and Appendices of the draft Interim Report

– Preliminary plan for WG1 Third Interim Meeting, for May/June 2019

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Collaboration with the LeTrench Project

• Both groups expressed interest in collaboration

• LeTrench shared draft report; final report in April 2019

• WG1 and LeTrench participants will jointly prepare a section in WG1 Chap. 2 to summarize lessons learned and explore opportunities for using risk-informed decision-making approach in management of legacy trenches.

Australia

UK

Canada7

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Leveraging the TERRITORIES Project

• The Spanish Huela Site Case Study final report to be completed in April 2019

• WG1 and TERRITORIES participants to jointly summarize the case study for in WG1 Interim Report

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Tinto River

North PondSouth Pond

Perimetral

Channel

Regulation Dam

Estero del Rincón

Industry-Ponds

Pipeline

Huelva City

Pump Station Perimetral

Wall

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Collaboration with the WG4 Kd Team

• The Kd Team to share their Kd database for fresh water environment

• Paul Black provided his compilation of the Kd data collected from the U.S. DOE sites

• WG1 to provide the draft Interim Report to the Kd Team for review of alternative treatments and Kd data selections for the Case Studies

• Joint team to explore the possibilities for developing a case study to demonstrate the application of alternative models post MODARIA II

9

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Making Progress on Draft Interim Report

• Chapter 3 (Risk-formed decision making approach): Expanded draft.

• Chapter 4 (Additional Considerations):

✓ Annotated outline for completing draft on Models for Intended Use and on the KdApproach and Alternative Methods.

✓ Completed draft section on Decision Processes for Legacy Trench Management

✓ Continued discussion of consistency between and integration of chemical vs. radiological risk assessments.

• Chapter 5 (Example Toolsets):

✓ Compiled list of codes used in Case Studies.

✓ Prepared summary sections on NORMALYSA and AMBER capabilities.

• Chapter 6 (Tessenderlo Phosphate Processing Site Case Study):

✓ Completed draft on PC-CREAM Model setup; checking results of initial runs.

• Chapter 7 (Zapadnoe Uranium Mill Tailings Site Case Study):

✓ GOLDSIM model set up; Checking results of initial runs.

• Chapter 8 (Brazil Tin Processing Case Study):

✓ Expanded Chap. 8 and added Appendix C with details for site description and model setup

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Plan for Next Meeting

WG1 3rd Interim

Meeting,Norway,

May/June 2019 (Tentative)

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Hope

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