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2 202 130

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IPC

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Application

2001113314/06, 2001-05-21

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Start date

2001-05-21

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Actual filing date

2001-05-21

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Published

2003-04-10

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Inventor

Mezhuev V.A.Potoskaev G.G.Kurskov V.S.Ivanov A.V.Sedel'Nikov O.L.Goloveshkin A.V.Balagurov N.A.Malovik V.V.Doronin A.S.Belyntsev A.M.Milovanov O.V.Kuznetsov V.F.Ponomarev-Stepnoj N.N.Morozov A.G.

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Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod"

METHOD FOR MANUFACTURING NUCLEAR FUEL PELLETS Russian patent published in 2003 - IPC

Abstract RU 2202130 C2

FIELD: nuclear power engineering; pelletized nuclear fuel manufacture. SUBSTANCE: method for manufacturing nuclear fuel pellets by mixing up source powders having different concentration of uranium- 235 and high concentration of uranium-234 and uranium-236, and also by using reconditioned powdered nuclear fuel includes mixing up powders with different content of uranium-235 to attain desired uniformity and desired uranium-235 content which are stored in their respective reservoirs and by compressing nuclear fuel pellets. Uranium-235 content in mixture is calculated in advance from expression , where Ri is uranium-235 content in reservoir i; mi is powder mass taken from reservoir i for mixture; M is mixture mass, kg; n is total number of reservoirs in first and second groups. Then compensating value ΔR depending on amount of thermal neutrons absorbed by uranium-234 and uranium-236 is found whereupon powder mass Δm, to be added to mixture from reservoir holding maximum uranium-235 content is calculated to ensure precise content of uranium-235 desired for the purpose. In this way desired content of uranium-235 is easy to control and adverse effect of uranium-234 and uranium-236 isotopes is compensated for. EFFECT: reduced deviation of mixture mass from desired value; enlarged range of source powders used. 5 cl, 9 tbl, 5 ex

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RU 2 202 130 C2

Authors

Mezhuev V.A.

Potoskaev G.G.

Kurskov V.S.

Ivanov A.V.

Sedel'Nikov O.L.

Goloveshkin A.V.

Balagurov N.A.

Malovik V.V.

Doronin A.S.

Belyntsev A.M.

Milovanov O.V.

Kuznetsov V.F.

Ponomarev-Stepnoj N.N.

Morozov A.G.

Dates

2003-04-10—Published

2001-05-21—Filed

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