[2J06-09] Criticality Safety

[2J09] Development of the insoluble neutron absorbers using self-assembled surfactant aggregates

(4)Evaluation of neutron shielding property and model debris adhesion

*Ryota Nambara¹, Takuji Kume¹, Noriaki Ushio¹ (1. Kao)

Keywords:Insoluble neutron absorbers, Surfactant, Worm-like micelles, Neutron transmission, Neutron imaging, VISCOTOP

We developed re-criticality prevention technology for the decommissioning of Fukushima-Daiichi Nuclear Power Plants. Our insoluble neutron absorbers are high viscosity fluid carrying boron carbide (B₄C) by using the surfactant-based rheology modifier (VISCOTOP). We evaluated its neutron shielding property and model debris adhesion.