The Latest Results from Source Term Research: Overview and Outlook

ABSTRACT Source term research has continued internationally for more than 30 years, with the overall aim of increasing confidence in the methods used in calculating the radioactive release to the environment after a severe reactor accident. Important data have been obtained EURATOM studies provide containment iodine chemistry, which codes like ASTEC 2.1, MELCOR 2.1 and MAAP such as ISTP interpreted with a view to further improvements in code capability This paper synthesis topics, and discusses ways to proceed, addressing those items considered high priority. The bases for this article come from the NUGENIA Two major issues generally affect experimental data from source term research: analytical exploitation and scale oxidising environmen 103/106, are considered of utmost interest. For transport, potential revolatilisation of fission products embedded in deposits needs further study. Containment iodine chemistry is extensively investigated evaluation. For mitigation, long term filter capabilities to remove Ru and the scrubbing capacity of pools undergoing satu further research. Aside from further knowledge need to assess the source term predictive ability of current system codes.