Environmental Impact Benchmarking Applicable for Nuclear Energy Systems under Normal Operation. Impact Assessment of CEA CADARACHE routine releases

Transcription

1 Environmental Impact Benchmarking Applicable for Nuclear Energy Systems under Normal Operation Impact Assessment of CEA CADARACHE routine releases Franck JOURDAIN 1

2 CEA CADARACHE FACILITIES EXPERIMENTAL NPP RESEARCH LABORATORIES ETC. The CEA is active in three main fields : Energy (fusion and fission research) Information and health technologies, And defense and national security 20 INB (research reactors, storage, uranium treatment etc.) 30 ICPE (research laboratories) 2

3 REGULATORY LIMIT VALUES The CEA has regulatory limit values for each facilities. Combined limit values : Radionuclide 3 H 14 C Noble gases Iodine β, γ α Permissible values of radioactive releases in air (GBq/an) 1.76E E E E E E-03 Permissible values of radioactive releases in water (GBq/an) 1.00E E E E-01 3

4 SOURCE TERM Liquid releases Durance river Gas releases Facilities stacks 4

5 EXPOSURE PATHWAY Atmospheric transfer Deposition (wet and dry) Air inhalation and submersion Nuclear Facilities Liquid transfers Irrigation Consumption Soil Irradiation Transfer in Food chains Sanitary & environmental impact Water irrigation and/or animal drink Water drink 5

6 Humans consumptions : USAGE FACTOR Animals consumptions : 6

7 RANKING OF RADIONUCLIDES LIQUID IMPACT Impact at Saint-Paul-lez-Durance Village (4km from CEA center) Reference group 7

8 RANKING OF RADIONUCLIDES ATMOSPHERIC IMPACT Impact at Saint-Paul-lez-Durance Village (4km from CEA center) Reference group Boundary layer in Durance river 8

9 RANKING OF EXPOSURE PATHWAY LIQUID IMPACT Ingestion without fish Fish ingestion 9

10 RANKING OF EXPOSURE PATHWAY ATMOSPHERIC IMPACT Vegetables 33% Air Submersion 22% Soil irradiation 2% Inhalation 15% Animals 0% Eggs 2% Meat 9% Milk 16% Indirect Vegetable 1% 10

11 CEA PROPOSITION Optional Task Atmospheric dispersion modeling multi stacks, continuous releases, 1 year statistical meteorological data (possibility to use continuous meteorological data Source term CEA facilities radioactive releases, Radionuclides of interest selection, Data from CEA Cadarache centre Environmental pathway Air, soil, vegetables and animals, CEA provides pathways used and a selection of vegetables and animals, Human pathway Air inhalation, air submersion, soil irradiation and ingestion CEA provides usual food of Saint Paul lez Durance people, 11

12 CEA PROPOSITION Optional Task Chemical impact assessment radionuclides present both a radiotoxic and a chemiotoxic character specific chemical element, air inhalation and ingestion pathways, specific methodology for impact assessment 12

13 MEETING OBJECTIVES Define scenarii Activity 3 of Action Plan release under normal operations, radiotoxic and/or chemiotoxic element. For each scenario, define source term, release conditions, environmental and exposure conditions. Benchmarking objectives Further work radionuclide and pathway ranking, comparison of country specific effects (participants use common source term and release conditions with the environmental and exposure conditions relevant from their country s situation, 13