2017 Annual Meeting

Presentation information

Oral presentation

III. Fission Energy Engineering » 306-1 Nuclear Safety Engineering, Nuclear Installation Safety, PSA

[1M01-04] Fukushima Daiichi Nuclear Power Plant Accident

Mon. Mar 27, 2017 10:05 AM - 11:10 AM Room M (16-504 Building No.16)

Chair: Chiaki Kino (IAE)

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

*Ikken Sato1 (1. Japan Atomic Energy Agency)

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.