FUEL ASSEMBLY REPAIR PROCESS Russian patent published in 2005 - IPC

Abstract RU 2249866 C2

FIELD: nuclear power engineering; repairs of nuclear reactor fuel elements.

SUBSTANCE: repairs of fuel assemblies where defective subchannels are detected include following procedures to restore their initial mechanical design: fuel elements and defective subchannels are removed form spacer grid section having defective subchannels. New serviceable subchannels are installed instead of defective ones, joined together, and secured to peripheral subchannels and to rim by resistance-spot welding using welding gun for the purpose. Fuel elements removed earlier are inserted in spacer grid subchannels and fuel assembly is washed out in hot demineralized water using live steam bubbling and hot air drying.

EFFECT: extended service life of fuel assemblies.

3 cl, 4 dwg

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RU 2 249 866 C2

Authors

Zarubin M.G.

Tabrisov V.G.

Bychikhin A.N.

Batuev V.I.

Dates

2005-04-10—Published

2003-02-14—Filed