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  • Working Group 8 Environmental Sensitivities

    Progress Report

    3rd EMRAS II Technical Meeting Opening Plenary 24 January 2011

    Presented by: Bliss Tracy

    Health Canada

  • Participants

    • Belgium (Catrinel Turcanu) • Canada (Bliss Tracy, Sohan Chouhan) • Germany (Jochen Tschiersch) • Greece (Maria Psaltaki, Giorgos Eleftheriou) • Italy (Franca Carini, Luigi Monte) • Norway (John Brittain, Mikhail Iosjpe) • Uruguay (Andres Saizar) • IAEA Secretariat (Volodymyr Berkovskyy)

  • Environmental sensitivity WG

    Objective: Explore the concept of environmental sensitivity in rural

    and semi-natural environments in the framework of assessments after an emergency situation

    Main tasks: • Clarify the concept of environmental sensitivity • Compile a list of sensitivity factors • Design scenarios • Carry out modelling exercises

  • Non-urban Scenarios

    • Agricultural (Europe and Canada) • Alpine (Central Europe) • Temperate forest (Europe and Canada)

    – Terrestrial – Freshwater aquatic

    • Arctic (Europe and Canada) – Terrestrial – Freshwater aquatic

    • Shallow marine or coastal

  • Radionuclide inputs

    • Cs-137, Sr-90, I-131

    • A uniform deposition of 1000 Bq/m2 each

    • Both wet and dry deposition

  • Calculate radionuclide concentrations in:

    • Soil or water

    • Plants (important in human food chain)

    • Animals (important in human food chain)

  • Calculate radiation doses to:

    • Individual humans obtaining 100% of their food and drinking water from the local environment.

    • Adults, 10-year olds, infants • During first and second years after input • Dose coefficients from ICRP-72 • Initially, without any countermeasures • Doses to biota could be added later

  • Working Group 8 “Environmental

    Sensitivity”

    Interim Meeting Piacenza, Italy 1–2 July 2010

  • Piacenza meeting, 1–2 July 2010

  • Lake Bracciano, Italy

    Freshwater aquatic scenario – MOIRA PLUS

  • Lake Heimdalsvatn, Norway

  • 1

    10

    100

    1000

    10000

    0 10 20 30 40 50 60

    13 7 C s  co nc en

    tr at io n  in  w at er  (B

    q  m

    ‐3 )

    Months from January 1986

    Lake Øvre Heimdalsvatn

    model output

    Radionuclide concentration in water (empirical)

    Calibrate the model using Chernobyl data

  • 0.0E+00

    1.0E‐03

    2.0E‐03

    3.0E‐03

    4.0E‐03

    5.0E‐03

    6.0E‐03

    7.0E‐03

    8.0E‐03

    9.0E‐03

    0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5

    D os e 

    13 7 C s  (m

    S)

    Months from January 1986

    Dose to critical individuals (aquatic pathway)

    Heimdalsvatn‐Winter Heimdalsvatn‐Spring Heimdalsvatn‐Summer Heimdalsvatn‐Autumn Bracciano

    Evolution of Cs-137 dose with time

  • Coastal marine scenario – modelled sites

  • 0,00E+00

    2,00E-07

    4,00E-07

    6,00E-07

    8,00E-07

    1,00E-06

    1,20E-06

    1,40E-06

    Fish Crustaceans Molluscs Seaw eeds

    Cs-137

    0,00E+00

    2,00E-08

    4,00E-08

    6,00E-08

    8,00E-08

    1,00E-07

    1,20E-07

    Fish Crustaceans Molluscs Seaweeds

    Sr-90

    0,00E+00

    5,00E-07

    1,00E-06

    1,50E-06

    2,00E-06

    2,50E-06

    3,00E-06

    3,50E-06

    4,00E-06

    4,50E-06

    Fish Crustaceans Molluscs Seaw eeds

    I-131

    0

    0,000005

    0,00001

    0,000015

    0,00002

    0,000025

    0,00003

    Fish Crustaceans Molluscs Seaweeds

    Pu-239

    Cs-137 Sr-90

    I-131 Pu-239

    Fish Crust-aceans Mol- luscs

    Sea- weeds Fish

    Crust- aceans

    Mol- luscs

    Sea- weeds

    Sea- weeds

    Sea- weeds

    Mol- luscs

    Crust- aceansFishFish

    Crust- aceans

    Mol- luscs

    Coastal marine scenario – doses to humans

  • Doses from Cs-137 by pathway

    1.E-08

    1.E-07

    1.E-06

    1.E-05

    1.E-04

    1.E-03

    1.E-02

    1.E-01

    Gr ou

    nd sh

    ine So

    il i ng

    es tio

    n

    Be rri

    es

    Ca rib

    ou

    Mo os

    e Sm

    all m

    am ma

    ls Gr

    ou nd

    bi rds

    Wa ter

    fow l

    Fis h

    Wa ter

    D os

    es (m

    Sv /y

    ea r)

    1 year-old 10 year-old Adult

    Forest scenario – doses from Cs-137

  • Doses during first year

    1.E-05

    1.E-04

    1.E-03

    1.E-02

    1.E-01

    one-year old 10-year old Adult

    D os

    e (m

    Sv /y

    ea r)

    Cs-137 Sr-90 I-131

    Forest scenario – comparison of radionuclides

  • Task Deadline (X = completed) Review of the concept of environmental sensitivity

    Literature review June 2009 X Draft concept document January 2010 X

    List of environmental sensitivity factors Initial list February 2010 Final list 2011

    Scenario Development Design January 2010 X

    Modelling exercises Interim results June 2010 X Final results June 2011

    Final report Preparation of final report End 2011

  • Tentative WG8 agenda for this week Monday 24 January

    14:00 – 17:30 Introductions, update on progress, presentation on agricultural scenario

    Tuesday 25 January 09:30 – 17:30 Presentations and discussion of agriculture,

    marine, forest, and Arctic scenarios

    Wednesday 26 January 11:00 – 17:00 Presentations and discussion of sensitivity

    concept

    Thursday 27 January 10:00 – 17:00 General discussion and work plan for 2011

    We meet in Room F0707 today at 14:00

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