A numerical methodology for estimation of volatile fission products release from nuclear fuel

In this paper we have developed a numerical methodology which is capable of estimating volatile fission product release from nuclear fuel under changing irradiation conditions with incorporation of all physical phenomena's. The present study bridges the gap between previous analytical studies by providing estimation of unstable fission product release under accidental condition with and without incorporation of precursor's history effect. Based on the present methodology a computer model “FIPRAP-Fission Product Release Analysis Program” has been developed and validated with standard fission product release problems and benchmarked against internationally accepted CORSOR-BOOTH model as well as Accident Source Term Evaluation Code (ASTEC). The result of the proposed model lies within 15% of internationally accepted models.