Korea Atomic Energy Research Institute

Korea Hydro Nuclear Power Co., Ltd.

Dae-Yong Song

Ho-Dong Kim

Ki Hong Kim

Hee-Sung Shin

Sang-Ho Na

Hee Won Seo

Jong-Man Park

Sang-Oh Bae

Chul Goo Ji

Bo-Young Han

Hyong Jin Hwang

See-Hwan Park

Byung-Hee Won

Sang Ho Na

Disclosed herein is a method for manufacturing oxide fuel pellets. The method for manufacturing the oxide fuel pellets includes (step 1) preparing nuclear fuel powder containing uranium dioxide (UO2+x, x=0 to 0.20), (step 2) compacting the nuclear fuel powder prepared in step 1 to manufacture green pellets, sintering the green pellets manufactured in step 2 at a temperature of about 1,200&#xb0; C. to about 1,400&#xb0; C. by using an atmosphere gas, and reducing the green pellets sintered in step 3 at a temperature of about 800&#xb0; C. to about 1,000&#xb0; C. by using a reducing atmosphere gas. The method for manufacturing the oxide fuel pellets according to the present invention performs the sintering at a low temperature of about 1,200&#xb0; C. to 1,400&#xb0; C. to manufacture economical and safe oxide fuel pellets that are adequate for the nuclear fuel specification.

Method for fabrication of oxide fuel pellets and the oxide fuel pellets thereby

A method for fabricating porous UOsintered pellets to be fed into the electrolytic reduction process for the purpose of metallic nuclear fuel recovery is provided, which includes forming a powder containing UOby oxidizing spent nuclear fuel containing uranium dioxide (UO) (step), fabricating green pellets by compacting the powder formed in step(step), fabricating UOsintered pellets by sintering the porous UOgreen pellets fabricated in stepat 1200 to 1600&#xb0; C., in an atmospheric gas (step), and forming UOsintered pellets by cooling the UOsintered pellets to room temperature, and reduction the same at 1000 to 1400&#xb0; C., in a reducing atmosphere (step).

[object Object]

Porous UOsintered pellets to be fed into an electrolytic reduction process for the purpose of metallic nuclear fuel recovery, include one or more hollow spaces formed from the surfaces toward the interiors thereof. When the porous UOsintered pellets are used in the electrolytic reduction process, the efficiency increases.

Growing community of inventors

Chungcheongbuk-do, South Korea

Dae-Yong Song