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

Abstract RU 2255383 C2

FIELD: nuclear power engineering; nuclear reactor fuel assembly manufacture.

SUBSTANCE: in order to improve shape and appearance of fuel assembly subchannels, to raise precision of their geometry, to minimize stresses during fuel assembly manufacture and introduction of fuel-element spacer grids in subchannels we propose to select press tools by actual wall thickness of tube and, consequently, that of subchannel billets using formula S die = K springiness (S of subchannel - 2S of billet wall); billets and subchannels are degreased, rinsed, and dried out, then placed in jig, subchannels are compressed, welded by means of robot, coordinates of welded subchannels are computed, spacer grid is oxidized and inspected by illuminating with laser beam and sorted out, and fuel assembly is produced without varnishing, and inserting expansion tip.

EFFECT: enhanced quality and operating reliability of fuel assemblies.

5 cl, 5 dwg

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RU 2 255 383 C2

Authors

Chapaev I.G.

Batuev V.I.

Bychikhin N.A.

Chinnov A.V.

Zarubin M.G.

Dates

2005-06-27—Published

2003-05-23—Filed