The use of an incomplete information data base for the assessments during the early phase of an accidental release of radioactive material

The information necessary to introduce countermeasures in the environment in the early phase following an accidental radioactive release will be vague. A method to rapidly reduce gross uncertainties of the radiological picture will be incorporated as a part of a European emergency response system. Basically, it involves the tuning of the main parameters of a general dispersion model by continuous comparison of the model output with early radiological survey data in a feed-back loop. (author)