Title: Contribution of CEA-Valduc centre on knowledge about atmospheric tritiated water transfers in the different compartments of the environment from survey data.
1Contribution 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
2Transferts
- Releases
- Atmospheric transfer
- Transfer Air / watertable /river
- water
- Tritium
- Food chain
3Atmospheric Release Tritium
100g/a
100g/an
5g
1g/an
1g
Constant annual Release for 10 y about 1 gramme
(358TBq)
4atmospheric Transfers
5Environment meteo
Dry conditions Unstable
Dry conditions stable
rainy All stabilities
6atmospheric Transfer measures and assessement
7Hydrogeology
8Bassin Versant de la Douix de Léry
Valduc
Léry
0
500 m
9Evolution of surface waters
10Concentrations in tritium of the uper water table
1987
11Concentrations in tritium of the uper water table
1997
12Concentrations in tritium of the uper water table
2008
13Free waters
- Data of environmental survey
14rains less tritiated than air water vapor
15Surface waters small influence of rains
16Grass between air vapor and rain water
17milk average of grass
18When rain deposition small, vapor deposition can
be seen
Station on site South North-East Nord-West
HTO air vapor w (Bq/l) 1 142 243 236
HTO rain (Bq/l) 1 36 238 100
HTO soil (Bq/l) 2 69 231 132
Average of monthly measurements in 1999-2000 1
continuous 2 points
19Tritium organically bound
- (Bq/L of combustion water)
20Water concentrations in air, rain, and
vegetables free and combustion
21Combustion water/ free water
22Conclusions
- 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.