AP 4.2: Radionuclide distribution in drinking water and sewage systems

Assessment of radiological impacts of nuclear accidents on urban drinking water supply and sewage systems

Dr. Christian Staudt, Dr. Jan Christian Kaiser

Helmholtz Zentrum München, Institut für Strahlenschutz, AG Anthropogene Umweltstrahlung, Ingolstädter Landstraße 1, 85764 Neuherberg

After the Fukushima accident in March 2011 it became apparent that a radioactive contamination of large regions can pose a radiation risk for urban water supply. Increased radionuclide concentrations beyond maximum permissible concentrations for infants could be measured in the urban drinking water of Tokyo for a short period after the accident.

In this project, potential exposures to radiation from hypothetical nuclear accidents by 1) urban water supply and 2) the urban waste water systems need to be identified with appropriate simulations and models. In addition to this, regions with water supplies at risk from nuclear contamination have to be determined. For this purpose, drinking water sources need to be identified and transport pathways to urban populations modelled with appropriate software.

For the model development of water supply, the freeware software EPANET of the Environmental Protection Agency (EPA) will be used with an additional radiological component. The functionality of this component should be validated by a simulation for a real city with the ++SYSTEMS and Kanal++ software (Tandler). Potential radiation doses from urban water supply and disposal systems for drinking and waste water need to be assessed. The consequences of these potential doses from the urban water pathways need to be assessed for radiation protection.


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