[1D05-06] Boiling and Drying of High-level Liquid Waste

[1D05] Enhancement of Analysis Method for Important Phenomena of Severe Accidents at Reprocessing Plant

(11) Development of model to calculate precipitation rate from highly active liquid waste

*Hisayuki Kyo¹, Daisuke Fujiwara¹, Hiroshi Shirai¹, Takashi Kodama², Yoshikazu Tamauchi², Naoya Satou², Mikio Kumagai³ (1. TEPCO SYSTEMS CORPORATION, 2. Japan Nuclear Fuel Limited, 3. Ui Science inc.)

Keywords:Boiling and drying accident, FATE code, Precipitation, Model development

In order to improve the FATE code, model to calculate precipitation rate from highly active liquid waste is developed. When the boiling and drying accidentt is occured, sludge precipitates from highly active liquid waste with chemical reactions such as NOx generation. The model is to calculate the precipitation rate. The model development enables to evaluate the effect of precipitation on the amount of non-volatile FP released to gas phase by entrainment.