WG 5: Radionuclide Transfer to wildlife EMRAS II Jan 2011 TRS: - - PowerPoint PPT Presentation

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WG 5: Radionuclide Transfer to wildlife EMRAS II Jan 2011 TRS: - - PowerPoint PPT Presentation

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EMRAS II WG 5: Radionuclide Transfer to wildlife EMRAS II Jan 2011 TRS: RADIONUCLIDE TRANSFER TO WILDLIFE EMRAS II Jan 2011 Activities Key output TRS on transfer to wildlife Core drafting group On-line database all

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SLIDE 1

EMRAS II Jan 2011

EMRAS II

WG 5: Radionuclide Transfer to wildlife

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SLIDE 2

EMRAS II Jan 2011

TRS: RADIONUCLIDE TRANSFER TO WILDLIFE

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SLIDE 3

EMRAS II Jan 2011

Activities

  • Key output TRS on transfer to wildlife

– Core ‘drafting group’

  • On-line database – all contributions

acknowledged in TRS

  • Publication in Radiation Environ Biophys
  • First draft considered at TM in 2010
  • Second draft considered in mid term meeting in

Sept 2010

  • Final draft at this meeting
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SLIDE 4

Equilibrium whole organism concentration ratios (CRwo)

  • used to predict radionuclide activity

concentrations in wildlife from exposure to radionuclides in media.

  • The CRwo value is defined as the

radionuclide conc in whole organism (Bq/kg fw) divided by the radionuclide concentration in the media (Bq/kg dw soil, water or sediment) or Bq/m3 air)

EMRAS II Jan 2011

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SLIDE 5

EMRAS II Jan 2011

Database

  • Collate & summarise transfer data
  • Outputs

– IAEA handbook – ICRP transfer task group

  • Database will remain available
  • Regular updates
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SLIDE 6

EMRAS II Jan 2011

Objectives

Provide IAEA Member States with data for use in the radiological assessment of wildlife as a consequence of routine discharges of radionuclides to the environment and existing contamination

  • situations. Application to accidental

release is also considered.

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SLIDE 7

EMRAS II Jan 2011

CONTENTS

  • 1. INTRODUCTION
  • Background
  • Objectives
  • Scope
  • Structure
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SLIDE 8

EMRAS II Jan 2011

  • 2. CONCEPTS AND QUANTIFICATION

– Transfer processes and exposure pathways

  • Physical and chemical processes
  • Biological uptake
  • Exposure routes

– Current approaches used in assessment models

  • Equilibrium Concentration Ratios
  • Specific activity approaches
  • Approach used in this handbook
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SLIDE 9

EMRAS II Jan 2011

  • 3. DATA COLLATION, MANIPULATION AND

EVALUATION – Purpose of the wildlife transfer database – Structure of the wildlife transfer database

  • Data entry issues

– Data transformations – Calculation of the summary concentration ratios

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SLIDE 10

EMRAS II Jan 2011

  • 4. TRANSFER VALUES FOR WILDLIFE

CRWO tables for:

– Terrestrial environments – Freshwater environments – Marine environments – Estuarine environments

Guidance on how to use the values provided

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SLIDE 11

EMRAS II Jan 2011

  • 5. APPROACHES FOR FILLING DATA

GAPS

– Surrogate organisms – Phylogenetic relationships – Biogeochemical analogues and ionic potential – Allometry – Data from a different ecosystem – Use of published reviews

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SLIDE 12
  • 6. CURRENT LIMITATIONS OF THE

APPROACH AND DATA

  • Appendix I. Tissue conversion tables
  • Appendix II: References for CRwo tables
  • Appendix III: glossary
  • References
  • Contributors to drafting and review

EMRAS II Jan 2011

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SLIDE 13

EMRAS II Jan 2011

This week

  • Sessions

– Monday afternoon

  • Briefing on final data selection for TRS
  • Handbook comments

– Thursday

  • Handbook comments
  • Presentations on the CRwo values
  • Using the new TRS values for different sources

/ applications

  • Future actions