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2 265 900

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Application

2002119965/06, 2002-07-22

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Start date

2002-07-22

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Actual filing date

2002-07-22

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Published

2005-12-10

(72)

Inventor

Chapaev I.G.Batuev V.I.Bychikhin N.A.Zarubin M.G.Chinnov A.V.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Khimkontsentratov"

METHOD FOR MANUFACTURING SPACER GRID OF NUCLEAR REACTOR FUEL ASSEMBLY Russian patent published in 2005 - IPC

Abstract RU 2265900 C2

FIELD: nuclear power engineering; manufacture of fuel assemblies for nuclear power reactors.

SUBSTANCE: proposed method includes manufacture of shaped subchannels from thin-walled zirconium tubes and their spot welding together to form field of shaped subchannels for passing through them fuel elements; manufacture of component parts of spacer grid hexahedral rim and their fixation by spot welding to peripheral shaped subchannels of assembled field; prior to using thin-walled zirconium alloy tubes for manufacturing shaped subchannels, thin-walled zirconium tubes of each definite lot are weighed, their total length and actual outer diameter are measured, and these data are used to evaluate mean design thickness of definite-lot thin-walled tube; then pressing-tool die key is chosen, and quantity of spacer grids manufactured from thin-walled tubes of definite lot is determined.

EFFECT: enhanced quality of spacer grid subchannel fabrication.

1 cl, 3 dwg

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RU 2 265 900 C2

Authors

Chapaev I.G.

Batuev V.I.

Bychikhin N.A.

Zarubin M.G.

Chinnov A.V.

Dates

2005-12-10—Published

2002-07-22—Filed

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