Working Group 8Environmental Sensitivities
Progress Report
3rd EMRAS II Technical MeetingOpening Plenary24 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, Italy1–2 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
137 Cs concen
tration in water (B
q m
‐3)
Months from January 1986
Lake Øvre Heimdalsvatn
model output
Radionuclide concentration inwater (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
Dose
137 Cs (m
S)
Months from January 1986
Dose to critical individuals (aquatic pathway)
Heimdalsvatn‐WinterHeimdalsvatn‐SpringHeimdalsvatn‐SummerHeimdalsvatn‐AutumnBracciano
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
Groundshine
Soil inges
tion
Berries
Caribou
MooseSmall
mam
malsGround bird
sWate
rfowl
Fish
Water
Dos
es (m
Sv/y
ear)
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
Dos
e (m
Sv/y
ear)
Cs-137Sr-90I-131
Forest scenario – comparison of radionuclides
Task Deadline (X = completed)Review of the concept of environmental sensitivity
Literature review June 2009 XDraft concept document January 2010 X
List of environmental sensitivity factorsInitial list February 2010Final list 2011
Scenario DevelopmentDesign January 2010 X
Modelling exercisesInterim results June 2010 X Final results June 2011
Final reportPreparation 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 January09:30 – 17:30 Presentations and discussion of agriculture,
marine, forest, and Arctic scenarios
Wednesday 26 January11:00 – 17:00 Presentations and discussion of sensitivity
concept
Thursday 27 January10:00 – 17:00 General discussion and work plan for 2011
We meet in Room F0707 today at 14:00
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