Assessment of CO2 Health Risk in Indoor Air Following a Leakage from a Geological Storage: Results from the First Representative Scale Experiment

Annick Loschetter (1) , Louis de Lary de Latour (1) , Fidel Grandia (2) , Emilie Powaga (3) , Bernard Colignan (3) , Manuel Marcoux (4) , Hossein Davarzani (1) , Olivier Bouc (1) , Thomas Le Guenan (1)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 Amphos 21
3 CSTB - Centre Scientifique et Technique du Bâtiment
4 IMFT - Institut de mécanique des fluides de Toulouse

If a leakage of CO2 out of a geological reservoir were to happen and to reach the vadose zone below a building, CO2 could migrate through the vadose and the building's slab and accumulate in the building, leading to possible acute risk for the inhabitants. A representative-scale experiment, including a prototype for a building, was developed to better understand and quantify this possible risk. It brought fruitful directions for further modeling work, since unexplained CO2 peaks were observed in the prototype. Numerical simulations were carried out to address the variability of CO2 concentrations considering the influence of soil and building properties as well as meteorological conditions, with promising results for risk analysis.

Mots clés: CO2 geological storage; Leakage; Intrusion; Indoor exposure; Risk for humans; Exposure; Experiment; Modeling; Risk analysis

Domaines: Risques; Géologie appliquée

Annick Loschetter, Louis de Lary de Latour, Fidel Grandia, Emilie Powaga, Bernard Colignan, et al.. Assessment of CO2 Health Risk in Indoor Air Following a Leakage from a Geological Storage: Results from the First Representative Scale Experiment. Energy Procedia, 2017, 114, pp.4287-4302. ⟨10.1016/j.egypro.2017.03.1573⟩. ⟨hal-01586740⟩