10:35 AM - 10:50 AM
[1M03] Correction for pressure measurement data of Fukushima Daiichi NPP Unit 3 and hints for understanding on accident progression behavior based on the corrected data
Keywords:Fukushima Daiichi, Unit 3, pressure transducer, reference water chamber, correction
Some of pressure measuremet means for Fukushima Daiichi NPP Unit 3 was adopting reference water chamber with water column in pipe down onto pressure transducers. During the accident, decrease of water column was possible resulting in deviation of pressure reading from the intended cover-gas pressure. Correction for this deviation has been applied.
Based on such corrected data, understanding on precise difference of pressures among reactor pressure vessel, supression chamber and drywell was realized. This understanding provided hints for better understanding of accident progression behavior.
Based on such corrected data, understanding on precise difference of pressures among reactor pressure vessel, supression chamber and drywell was realized. This understanding provided hints for better understanding of accident progression behavior.