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2 268 507

(13)

(51)

IPC

G21C3/62(2006-01-01)

G21C21/00(2006-01-01)

(21) (22)

Application

2004101198/06, 2004-01-13

(24)

Start date

2004-01-13

(22)

Actual filing date

2004-01-13

(45)

Published

2006-01-20

(72)

Inventor

Gagarin Aleksandr Evgen'EvichDobrinskij Vladimir StepanovichManych Anton VladimirovichRusin Jurij Grigor'Evich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Metallurgicheskij Zavod"

CERAMIC NUCLEAR FUEL PELLETS WITH ADJUSTABLE MICROSTRUCTURE Russian patent published in 2006 - IPC G21C3/62 G21C21/00

Abstract RU 2268507 C2

FIELD: nuclear power engineering.

SUBSTANCE: pellets with adjustable microstructure are composed of uranium dioxide or uranium dioxide with 2.0-8.0% of gadolinium oxide additive including alumina. In addition to alumina, alloying additive also contains at least one oxide selected from TiO₂, Nb₂O₅, SiO₂, CaO, MgO, BeO, Na₂O, and P₂O₅ in amount providing content of aluminum and oxide-forming element from indicated series within a range of 20 to 500 ppm for each element based on the weight of uranium at following proportion: 60-85% Al and the rest above-indicated oxide-forming element. Alloying additive is added, without preliminary caking thereof followed by disintegration, directly during preparation of press-powder.

EFFECT: improved quality of pellets.

3 cl, 3 dwg, 3 ex

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RU 2 268 507 C2

Authors

Gagarin Aleksandr Evgen'Evich

Dobrinskij Vladimir Stepanovich

Manych Anton Vladimirovich

Rusin Jurij Grigor'Evich

Dates

2006-01-20—Published

2004-01-13—Filed