2020 Annual Meeting

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 503-1 Reactor Chemistry, Radiation Chemistry, Corrosion, Water Chemistry,Water Quality Control

[3D05-07] Corrosion Chemistry and FP Behavior 2

Wed. Mar 18, 2020 11:05 AM - 11:55 AM Room D (Lecture Bildg. L 1F L-1)

Chair:Ryuji Nagaishi(JAEA)

11:35 AM - 11:50 AM

[3D07] Evaluation of Short and Long-Term Behavior of Radioactive Nuclides Distributed in Fukushima Daiichi NPP

5. Evaluation of short and long-term radioactive nuclide behavior in the contaminated water

*Shunsuke Uchida1, Hidetoshi karasawa1, Chiaki Kino1, Masanori Naitoh1, Masahiko Ohsaka2 (1. Institute of Applied Energy, 2. Japan Atomic Energy Agency)

Keywords:Fukushima Daiichi NPP, contaminated water, fisshion products, severe accident

The radioactive FPs in the contaminated water stored in the basement of T/B were constant for 6 years after the 1F accident, while 137Cs and 3T radioactivity concentrations have increased as reducing inventory of the water due to reducing ground water leakage. By applying the short/long term FP behavior evaluation procedure, it was explained that the increase in leakage water from the R/B due to water level between R/B and T/B resulted in increase in radioactivity in the contaminated water.