RELEASE OF RADIOACTIVITY DUE TO AN ACCIDENT OCCURRING ON A FLYOVER IN THE URBAN ENVIRONMENT

In the event of an accident involving a vehicle carrying dispersible radioactive material, occurring on a fly-over the residents living nearby can receive some dose. The problem is significant in the urban environment since the population density and the probability of accidents in cities are high, although the probability of a severe enough accident to cause significant release of activity, in a city, is low. The dose received at a location following a release is determined by the concentration of activity there. In such an accident in a city, persons residing on the higher floors close to the height of release would experience increased concentration of activity. At these locations, concentration of activity in the nearby residences are calculated.