[1I01-06] Fuel Debris Characterization

[1I03] Development of the insoluble neutron absorbers using self-assembled surfactant aggregates

(5)Evaluation of fluidity and model debris adhesive property

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

Keywords:Insoluble neutron absorbers, Surfactant, Worm-like micelles, Fluidity, Adhesive property

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 fluidity and model debris adhesive property. As a result, we found that the absorbers can be controlled to wide range of fluidity by changed surfactant concentration.