Evaluation Of The Radiological Impact On The Italian Territory Of A Severe Nuclear Accident At Krsko Npp By Means Of A Statistical Methodology

This paper presents the results of a statistical analysis to get an indication of the radiological impact on the Italian territory of a severe nuclear accident at the Krsko Nuclear Power Plant (NPP). Preliminarily, the Source Term values adopted in the statistical analysis have been evaluated by means of the fast-running code RASCAL 4.3. Afterward, using codes specifically developed by IRSN, the statistical results in the form of Cs-137 total ground deposition threshold trespassing probability maps are given. A preliminary RASCAL 4.3 standard calculation of I-131 integrated air concetration was also performed. The obtained values were used to evaluate the thyroid equivalent dose and the effective inhalation dose, then compared to that obtained by the Italian Civil Protection in the context of the national plan of protective measures in case of radiological emergencies. An analysis of the time-distribution of I-131 air concentration on the Trieste district is also presented.