2019 Fall Meeting

Presentation information

Oral presentation

III. Fission Energy Engineering » 301-1 Reactor Physics, Utilization of Nuclear Data, Criticality Safety

[2J06-09] Criticality Safety

Thu. Sep 12, 2019 10:50 AM - 11:55 AM Room J (Common Education Bildg. 2F D22)

Chair:Satoshi Takeda(Osaka Univ.)

11:20 AM - 11:35 AM

[2J08] Development of the insoluble neutron absorbers using self-assembled surfactant aggregates

(3)Evaluation of radiolytic products

*Noriaki Ushio1, Hiroyuki Terazaki1, Kouji Koyanagi1, Norikazu Jin1, Toshio Hayashi1 (1. Kao Corporation)

Keywords:Insoluble neutron absorbers, Surfactant, Viscotop, Worm-like micelles

For the purpose of removing fuel debris from the Fukushima-Daiichi Nuclear Power Plants safely and smoothly, we are developing a re-criticality prevention technology using insoluble neutron absorbers. We have found out that high viscosity fluid insoluble in the water which can hold B4C particles stably by using the VISCOTOP (complex of alkyl aryl sulfonate and alkyl ammonium salt). VISCOTOP which forms self-assembly surfactant aggregates known as a worm-like micelle, is predicted to generated various degradation products by radiolysis. This time, we tried to evaluate the safety and the effect on the substrate material by performing qualitative and quantitative measurement of the radiolyzate.