Working Group

Reference models for waste disposal

Its difficult to make prediction, especially about the future

Mark Twain

Gerhard Pröhl (Group leader) GermanyTobias Lindborg SwedenAlan Tkaczyk EstoniaShulan Xu SwedenYves Thiry FranceMarang Lama FranceGeert Olyslaegers BelgiumLaura Limer UKGerald Kirchner GermanyHaiyong Jung KoreaJozef Pritrsky SlovakiaKai Hamalainen FinlandPhilippe Calmon FranceAngelica Lorentzon SwedenVaclav Hanusik Slovakia

15 Participants

Aims• Develop reference modelling approaches and

reference cases for biosphere in the future on the basis of the BIOMASS approach

• Include environmental change in biosphere modelling– Climate, society, land use

• Set of models/cases that cover a wide range of environmental situations

Relevant combinationsEcosystem(Receptor)

Geosphere Biosphere Interface(Source)

Well Soil Surface water

Sediment Sea

Agricultural x x xForest x xGrassland x xWetland x xLake x xRiver x xSea x x

Processes involved in environmental transport and exposure to man • Drinking water (human, cattle)• Contamination of soils

– Uptake by plants– Accumulation / speciation / migration / sorption / desorption – Erosion / resuspension / bioturbation

• Foliar contamination– Interception, weathering, translocation

• Transfer to meat and milk• Processes in sediments

– Sorption / desorption /speciation / bioturbation / resuspension column

• Processes in water– Speciation, uptake by fish etc.

• Ingestion, Inhalation, ext. exposure

Work for the next meeting:Process analysis

• Identify impact of climatic factors on processes that may have a major influence on dose to man (all members)– Soils – Lakes– Landscape

• Are these processes/features of more universal nature or are they specific to a site?

• In how far have models to be modified – developed for temperate climate – to address the specific conditions of the changed climate

Work until the next meeting:Model calculation (3-5 group members)

• Assessment of exposures for GBI-Ecosystem combinations

– Apply present day temperate climate conditions• Assumptions, conceptual model, processes, parameters

• Modification and application of model for other climates

– To give modifications for Assumptions, conceptual model, processes, parameters

– Justify modification• Compare results

– Exposure, concentration in media– First conclusion

GBI-Ecosystem combinations to be considered

Ecosystem GBIAgriculture Well, soil, Grassland, Wetland soilAgriculture Well, soilSemi-natural SoilAgriculture River, sediment

Others to be specified

Radionuclides to be considered

Cl-36, Ni-59, Se-79, Tc-99, I-129, Ra-226, Np-237, Pu-239

Next meeting

• Madrid• 3 days in the week of 4-8 May• Common sessions with BIOPROTA