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