Summary for WG2 Reference approaches to modelling for management - - PowerPoint PPT Presentation

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Summary for WG2 Reference approaches to modelling for management - - PowerPoint PPT Presentation

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Summary for WG2 Reference approaches to modelling for management and remediation of NORM and legacy sites Astrid Liland, NRPA, Norway, WG2 Leader EMRAS II meeting, Vienna HQ 24-28 January 2011 Work performed last year 1. Presentations

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Summary for WG2 – Reference approaches to modelling for management and remediation of NORM and legacy sites

Astrid Liland, NRPA, Norway, WG2 Leader EMRAS II meeting, Vienna HQ 24-28 January 2011

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Work performed last year

1. Presentations of NORM and legacy sites in various countries, e.g. NORM solid waste distribution in China 2. Discussions on modelling and regulatory challenges

phosphate 4.62% iron 44.47% coal 29.42% copper 6.48% lead/zinc 1.22% tin 2.03% coal gangue 2.17% aluminum 2.95% vanadium 1.23%

  • thers

4.48% zircon 0.04% niobium/ tantalum 0.05% rare-earth 0.86%

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  • 3. Gela - phospogypsum stack disposal

site

– Modelling with e.g. ReCLAIM and RESRAD, both for the present situation and for future scenarios – Comparing to criteria, both the 1000 Bq/kg clearance level for natural decay chains material and dose criteria of 0.3 – 1 mSv/y – Clear that Gela cannot be released for unrestricted use and the phosphogypsum cannot be reused (e.g. for building roads) due to both radiological and other pollutants present

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  • 4. General Assessment Methodology

Process (GAMP) development

  • Guidance document on how to use models

for assessing the radiological impact of NORM and legacy sites

  • Valuable input from many countries and

different disiplins (modellers, regulators, technical advisors)

  • Draft version tested for various types of

sites

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  • 4b. Testing the draft General Assessment

Methodology Process The draft GAMP was tested for real sites in:

  • Australia (nuclear weapons testing)
  • Belgium (phosphate industry, radium

extraction and production of sources)

  • Brazil (monazite ore processing)
  • Italy (phosphogypsum stack)
  • Norway (former rare earth metals mining

site)

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no yes yes Investigate and characterise the site Define objectives Screening assessment Decision maker Stakeholder Decision maker Establish screening criteria Stakeholder Decision maker Establish cleanup criteria Decision maker Stakeholder Stakeholder Remedial action Stakeholder Actions to be taken See expanded diagrams in subsequent figures Measurements Decisions (not necessarily radiological) Identify the problem yes no Communication General steps More realistic assessment no Detailed assessment Decision maker Screening criteria satisfied? Screening criteria satisfied? Screening criteria satisfied? Cleanup criteria ti fi d? yes

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Interim meeting in France 2010

  • Facilitated by IRSN and AREVA
  • Former uranium mining and milling sites in

the Limousin region

  • Presentation of the pre remediation

situation as well as the current status

  • All available monitoring data shared with

the group

  • 19 participants from 15 countries, all

continents represented

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AREVA

Industrial Site of Bessines in 1978

Brugeaud open pit mining waste Gartempe river extraction shaft mining waste tailings processing plant

  • re stockpile
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AREVA

Industrial Site of Bessines in 2010

mining waste covering the tailing storage: Brugeaud open pit Industrial Site mining waste covering the tailing storage: Lavaugrasse water treatment plant Gartempe river

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Bellezane Open-Pit Mine (in operation) 1992

AREVA

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Bellezane Open-Pit Mine (Reclaimed) 2001

AREVA

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Plans for this week

  • Discuss modelling experience with the Gela and

Bellezane sites

  • Added features of the RESRAD-OFFSITE code
  • Links between Regulatory Objectives, Assessment

Methods and Scientific Support and link to the IAEA’s International Working Forum for Regulatory Supervision

  • f Legacy Sites
  • Discuss the role of guideline levels
  • Final discussions on draft GAMP and plan for finalization
  • Interim meeting venue – suggestions from Argentina,

Belgium, Bulgaria, China, USA, possibly more

  • Contents and structure of final report to be decided
  • Action plan for 2011 to de decided
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”International Conference on Radioecology and Environmental Radioactivity” in June 2011 in Hamilton, Canada

  • Oral presentation of the group and its

work so far

  • www.ecorad2011.net

The IAEA Environmental Modelling for Radiation Safety programme (EMRAS II) – new working group on “Reference approaches to modelling for management and remediation at NORM and legacy sites”

  • A. Liland1, R. Avila2, J. Brown1, J.C.M Cañadas3, D. da Costa Lauria4, T. Doursout5, K.

Ivanova6, V. Koukoulio7, L. Magro8, B. Michalik9, C. Nuccetelli10, R. O’Brien11, S. Pepin12, C. Potiriadis13, G. Pröhl7, L. Setlow14, G. Smith15, B. Smodis16, M. Sneve1,

  • L. Sweeck17 , A. Tkaczyk18, B. Varga19, D. de Villiers20, S. Walker14, Q. Wu21, C.

Yu22