Preparatory discussion on Processes and Parameters of relevance for WG7

All participants

(WGL in the capacity of moderator of

the discussions)

Conclusions Journées Tritium SFRP 2009

Importance of tritium speciation Problems with definition and measurements units for low

doses Importance of measuement techniques in field work and

research Importance of appropiate vocabulary: e.g.

bioaccumulation Difficulties in épidémiologie: multiparamètres Problèms with disposal and treatment of 3H Difficulties of ICRP: REB, models, gestion of exposure

and risk Problems with OBT analitical techniques

Intreaction matrix-terrestrial (IUR)

Simplified for 14C

Macro processes• Wet deposition-HTO: concentration in rain(depends on..)Interception by plants (depends on…)Uptake by leaves (depends on..)Penetration in soil (depends on..)SNOW• Dry deposition HT and HTO:Uptake by bare soil (depends on..)Uptake by covered soil (depends on..)Conversion HT>HTO (depends on..)Uptake by plants (depends on…)Uptake in dew conditionsWINTER

Macro processes- continuation• Reemission from soil-HTO (depends on..)• Reemission from plants-HTO (depends on..)• Transfer from soil to plants-HTO(depends on..)• Secondary source due to reemission –

influences on final plant and soil dynamics)• Reemission from forest ??• Dynamics of the soil-plant complex (depends

on..)• Losses in storage- preparation of feed –HTO• Losses/concentration in food preparation-HTO• Contribution of OBT metabolism to plant HTO at

harvest?

Macro processes- continuation• OBT formation in daylight• OBT formation in night• OBT respiration• OBT partition to edible plant part• OBT speciation• OBT oxidation in feed preparation and storage• OBT oxidation in food preparation and storage• OBT in litter and soil ??