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Working Group 1

Working Group 1. Reference and Graded Approaches for Assessing the Impact of Radioactive Discharges. Aims. Methodologies for setup of reference models for assessing radiological impacts Planned releases Existing situations Discharges from HLW to the environment Find consensus on

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Working Group 1

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  1. Working Group 1 Reference and Graded Approaches for Assessing the Impact of Radioactive Discharges

  2. Aims • Methodologies for setup of reference models for assessing radiological impacts • Planned releases • Existing situations • Discharges from HLW to the environment • Find consensus on • Reference principles • Procedures • Data sets for defined situations • Standardization and harmonization of models for assessing radiological • Humans • Biota

  3. Relevant situations • Impact of planned discharges • Nuclear industry, NORM, uranium industry, hospitals, laboratories, small enterprises, shallow land burial • Compliance of discharges during operation • Monitoring strategies • Locations, frequency, environmental media • Use of monitoring data in impact assessment • Existing contaminations • Past contaminations • NORM, etc.

  4. Integrated assessment • Aim: Model validation • Test and compare assessment model predictions of the transfer of radionuclides in real environments • Analysis of radionuclide transfer subsequent to environmental contaminations • Releases to atmosphere • Releases to water (fresh)water bodies • Output • Activity in environmental media • Exposures via all relevant pathways • Internal/external exposure • Humans and biota • Sensitivity: pathways / processes / parameters

  5. 6 proposedissuesdiscussed • Prospective assessments of radioactive discharges • Prospective assessments of the long-term impact of radioactive waste repositories • Prospective assessment of the impact of NORM releases • Assessment of radiological impact of legacy sites • Integrated assessment • Regulatory approach for humans and biota (to be discussed today)

  6. Response • Interests for all topics • Some participants are interested in more than one topic • Preliminary ranking:Waste disposal > NORM/Existing situations > Reference models for releases

  7. Possible Groups • Reference methodologiesandmodelsforplannedreleases • Planning • Operation • Reference modelsforwastedisposal • Reference cases • Climate • Interface geosphere/biosphere • Environmental changes • Reference modelsforexistingsituations • NORM (U, coal, oil gas) • Legacy sites (Russia, Central Asia, USA, UK, etc)

  8. How to go on • Discussion of a regulatory approach on protection of humans and biota (with WG 2) • Agreement on subgroups • Continue to work in sub-groups

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