[1J13-18] Corrosion, Electrochemistry, Radiolysis 3

[1J13] Challenge toward extensive corrosion prevention in PCV system under the Influence of α/β/γ radiation

(1)Aims and plan of the research

*Yutaka Watanabe¹, Chiaki Kato², Mitsumasa Taguchi³, Hideki Katayama⁴ (1. Tohoku Univ., 2. JAEA, 3. QST, 4. NIMS)

Keywords:Corrosion, Radiolysis, Fukushima Daiichi Nuclear Power Station, Nuclear decommissioning, Ultra-fine bubble

This study aims to elucidate corrosion phenomena in wet environments where α-/β-emitting radionuclides coexist with steel and to establish a technique to predict the corrosion rate in order to ensure the long-term reliability of steel structures that ensure important confinement functions in the debris removal process, such as existing PCVs and newly constructed negative pressure maintenance piping. Furthermore, by using inert gas ultra-fine bubbles, we aim to develop a new corrosion prevention technology that has excellent basic applicability to PCVs and has no secondary effects. In this talk, the aim and the overall plan of the research will be introduced.