[3G01-05] Criticality Control Technique Development 3

[3G02] Criticality control technique development for Fukushima Daiichi fuel debris

(38)Viscosity and conveyance process performance of insoluble neutron absorber

*Shohei Kawano^1,2, Yuta Shindo^1,2, Satoshi Miyashiro^1,2 (1. IRID, 2. Toshiba)

Keywords:Fuel debris, Fukushima daiichi nuclear paower plant, neutron absorber, criticality safety

Criticality control technique for fuel debris extraction has been developed. In order to convey and adhere to underwater fuel debris in remote construction, the neutron absorption material which consists of water glass and gadolinium oxide mixture was developed, and viscousity and time dependence as fanction of temperature was evaluated. And it is conformed that the testing material which adjusted cure time could be conveyed a maximum of 50 m with a hose by using squeeze type pump.