Overview of Radioactive Material Analysis and Research Facility Laboratory-1

Sugaya, Yuki; Akutsu, Hideyuki; Shibata, Hiroshi; Ichitsubo, Koji

no journal, , 

Effects of beta-ray irradiation and gas-phase radiolysis on corrosion

Sato, Tomonori; Hata, Kuniki; Kato, Chiaki; Kimura, Atsushi*; Taguchi, Mitsumasa*; Watanabe, Yutaka*

no journal, , 

To understand the local corrosion environment around fuel debris, effects of beta-ray irradiation on the corrosion behaviors of carbon steel and stainless steel were investigated by electrochemical tests. The result indicated that the irradiation of beta-ray would enhance the localized corrosion of stainless steel. The polarization resistance of carbon steel was also measured by using the same system. Effects of gas-phase radiolysis on the corrosive environment in the liquid-phase were also investigated by gamma-radiolysis experiments. The current results show that the concentrations of nitrogen oxides tend to increase when the gas/liquid ratio of samples increased. Oxygen in the headspace also enhanced the nitrogen oxide production.

Remote control technology for monitoring inside RPV pedestal during retrieval of fuel debris

Matsuhira, Nobuto*; Komatsu, Ren*; Nakashima, Shinsuke*; Yamashita, Atsushi*; Fukui, Rui*; Takahashi, Hiroyuki*; Shimazoe, Kenji*; Woo, H.*; Tamura, Yusuke*; Takashi, Takayuki*; et al.

no journal, , 

Experimental research related to formation of debris using large-scaled test facility in CLADS

Nagae, Yuji

no journal, , 

Summary of JAEA's efforts for fuel debris retrieval

Koyama, Shinichi

no journal, , 

Japan Atomic Energy Agency (JAEA) will build a knowledge base that enables safety and risk assessment through basic research as a Sherpa for TEPCO HD and NDF for the retrieval of fuel debris from TEPCO's Fukushima Daiichi Nuclear Power Station (1F).