NUCLEAR REACTOR FUEL ASSEMBLY Russian patent published in 1999 - IPC

Abstract RU 2129738 C1

FIELD: assembling cores of pressurized-water reactors. SUBSTANCE: fuel assembly has fuel elements joined to bottom support grid by means of fastening unit. The latter is, essentially, cylinder flexible in cross-sectional area installed in seating hole of support grid. Fillet provided in cylinder bottom contacts surface of annular groove which is coaxial with seating hole below bottom end of support grid which holds fuel element in position within support grid. Cylinder flexibility in cross- sectional area is provided due to its sectional design. Diameters of cylinder and seating hole must meet definite relations including also distance from top end of support grid to surface of fillet contacting annular groove. EFFECT: reduced vulnerability of fuel elements to damage during their installation or refueling, reduced vibration of fuel elements, improved efficiency of fuel utilization. 9 cl, 5 dwg

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RU 2 129 738 C1

Authors

Panjushkin A.K.

Bek E.G.

Petrov V.I.

Aleshin Ju.A.

Nugaev E.Kh.

Dates

1999-04-27—Published

1997-12-29—Filed