The main purpose of this paper is to address a number of topics of general interest, widely recognised as still open issues in nuclear fission safety, and to critically analyse them to identify uncertainties and weaknesses. Integral tests are important to have a global vision of an accident scenario. It is widely accepted that dominant phenomena, involving several parts of a plant, cannot be easily disconnected one another. A non-linear coupling between neutronics and thermal-hydraulics followed, for example, by another coupling between source term physics and chemical aspects of radioactive material released during an accident, may cause a relevant number of lacks, weaknesses and uncertainties. The main cause is that, in many cases, accidents involving multiple couplings cannot be considered as uniquely due to bundle, circuit or containment failures. On the other hand, a number of relevant phenomena can be investigated only applying to a separate phenomena approach.
|Titolo:||Innovative Approaches on Source Term Reduction and Aspects of Severe Accident Management in the Containment|
|Data di pubblicazione:||2-apr-2000|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|