3:15 PM - 3:30 PM
[2F12] Evaluation of Fission Product Release during the NPP Severe Accident
(19)Improvement of Molybdenum Release Model in the SAMPSON Code
Keywords:SAMPSON, Cesium, Molybdenum, FP release
Molybdenum release model was re-evaluated because cesium molybdate transport characteristics have large impact on cesium distribution. Evaporation rate-limiting approach from the fuel surface was introduced instead of the diffusion rate-limiting approach in the previous version of the SAMPSON code. Consequently, the new model is possible to take into account of the atmospheric condition changes during the accident progression.