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2 732 730

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IPC

G21C21/00(2006-01-01)

(21) (22)

Application

2020115992, 2020-05-15

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Start date

2020-05-15

(22)

Actual filing date

2020-05-15

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Published

2020-09-22

(72)

Inventor

Zarubin Mikhail GrigorevichStrukov Aleksandr VladimirovichMokshin Ilya VladimirovichLebedev Nikolaj MikhajlovichKrasilnikov Dmitrij AleksandrovichGrot Aleksandr Nikolaevich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennostyu

FUEL ASSEMBLY MANUFACTURING METHOD Russian patent published in 2020 - IPC G21C21/00

Abstract RU 2732730 C1

FIELD: physics.

SUBSTANCE: invention relates to a method of manufacturing a fuel assembly for nuclear reactors. Proposed method comprises arranging spacer grids with coaxially placed cells at certain distance from each other and nuclear reactor fuel elements (FE) into coaxial cells. When a rod fuel element is spaced in each of the distance grids, an individual frequency of ultrasonic oscillations is supplied to it by means of at least two ultrasonic emitters which enable to change the individual frequency of ultrasonic oscillations when the fuel element enters each of the spacer arrays. Selection of frequency for optimum press-in force as channel tubes enter spacer grids is performed by programmer entering control system in frequency range from 18 to 40 kHz. Filling feedback with a force sensor mounted on a pusher and a unit for responding to trends in growth of assembly force in real time provides for issuing a signal for change in oscillation frequency to ultrasonic emitters both by their value and direction.

EFFECT: technical result is reduced friction of fuel element on surface of cells of spacer grids and elimination of deformation of parts at passage of both first and next spacer grids, elimination of occurrence of surface scratches during passage of fuel element in cells of spacer grids.

1 cl, 4 dwg

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RU 2 732 730 C1

Authors

Zarubin Mikhail Grigorevich

Strukov Aleksandr Vladimirovich

Mokshin Ilya Vladimirovich

Lebedev Nikolaj Mikhajlovich

Krasilnikov Dmitrij Aleksandrovich

Grot Aleksandr Nikolaevich

Dates

2020-09-22—Published

2020-05-15—Filed