Icone19-43851 Characteristics of Fission Products Behavior on a Severe Accident in Fast Breeder Reactor
Year: 2011
Type: conference-abstract
Abstract: Japan Nuclear Energy Safety Organization (JNES) has been developing the ACTOR code for the analysis of the fission products behavior under the severe accident condition to apply the probabilistic safety assessment to fast breeder reactor plants. Major analysis models of the ACTOR code were validated and adjusted by related experimental results. The fission products behavior on PLOHS (Protected Loss of Heat Sink) sequence which is one of the typical severe accidents in FBR plant was analyzed by using the ACTOR code. It was confirmed that the ACTOR had an enough capability to analyze the fission products behavior during severe accident. From the analysis results of PLOHS, it was confirmed that cesium is transferred to the cover gas region much more than iodine because iodine which is one of halogen connects to sodium easily and is retained in the coolant. Therefore, cesium is important and it is needed to examine the necessity to treat cesium as one of FPs considered in reactor establishment permission for FBR plant. Thus, cesium transfer behavior in sodium during the rare gas bubbles rise from fuel to the cover gas region was confirmed to be very important. And JNES started study including validation test about cesium transfer behavior with Hokkaido University.
Institutions: Japan Nuclear Energy Safety Organization, Hokkaido University
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2157129727