1. Septembre 2009SFRP Paris1 Contribution of CEA-Valduc centre on knowledge about atmospheric tritiated water transfers in the different compartments of the environment from survey data. Ph. GUETAT, A. TOGNELLI, L. VICHOT

2. Septembre 2009SFRP Paris2 Transferts Releases Atmospheric transfer Transfer Air / watertable /river –water –Tritium Food chain

3. Septembre 2009SFRP Paris3 Atmospheric Release : Tritium Constant annual Release for 10 y : about 1 gramme (358TBq) 100g/an 1g/an 100g/a 5g 1g

4. Septembre 2009SFRP Paris4 atmospheric Transfers Measures and assessments

5. Septembre 2009SFRP Paris5 Environment meteo Dry conditions Unstable Dry conditions stable rainy All stabilities

6. Septembre 2009SFRP Paris6 atmospheric Transfer measures and assessement NENWSE 7.10 -8 1.4 10 -7 9.10 -8 6.4 10 -8 2006 :

7. Septembre 2009SFRP Paris7 Hydrogeology

8. Septembre 2009SFRP Paris8 Bassin Versant de la Douix de Léry 0 500 m Valduc Léry

9. Septembre 2009SFRP Paris9 Evolution of surface waters

10. Septembre 2009SFRP Paris10 Concentrations in tritium of the uper water table 1987

11. Septembre 2009SFRP Paris11 Concentrations in tritium of the uper water table 1997

12. Septembre 2009SFRP Paris12 Concentrations in tritium of the uper water table 2008

13. Septembre 2009SFRP Paris13 Free waters Data of environmental survey

14. Septembre 2009SFRP Paris14 rains less tritiated than air water vapor

15. Septembre 2009SFRP Paris15 Surface waters small influence of rains

16. Septembre 2009SFRP Paris16 Grass between air vapor and rain water

17. Septembre 2009SFRP Paris17 milk « average » of grass

18. Septembre 2009SFRP Paris18 When rain deposition small, vapor deposition can be seen Station on siteSouthNorth-EastNord-West HTO air vapor w (Bq/l) 1 142243236 HTO rain (Bq/l) 1 36238100 HTO soil (Bq/l) 2 69231132 Average of monthly measurements in 1999-2000 1 : continuous 2: points

19. Septembre 2009SFRP Paris19 Tritium organically bound (Bq/L of combustion water)

20. Septembre 2009SFRP Paris20 Water concentrations in air, rain, and vegetables : free and combustion

21. Septembre 2009SFRP Paris21 Combustion water/ free water

22. Septembre 2009SFRP Paris22 Conclusions Wet deposition (rains) more important than supposed for water table Air vegetable transfer more important than free water OBT transfer Must we measure OBT for survey purpose ? Which parameters in case of accident ? Validation of codes.