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2 726 936

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IPC

G21C3/34(2006-01-01)

(21) (22)

Application

2019104962, 2019-02-21

(24)

Start date

2019-02-21

(22)

Actual filing date

2019-02-21

(45)

Published

2020-07-17

(72)

Inventor

Gryaznov Nikolaj SerafimovichKlinevskij Mikhail GeorgievichKruglov Oleg AnatolevichSorokin Yurij VasilevichSmirnov Viktor PavlovichLeonteva-Smirnova Mariya VladimirovnaNaumenko Irina AleksandrovnaSkupov Mikhail Vladimirovich

(73)

Holder

Aktsionernoe Obshchestvo Nauchno-Issledovatelskij Institut Neorganicheskikh Materialov Imeni Akademika A.A. Bochvara"

METHOD OF MAKING SPACER GRIDS FOR A NUCLEAR REACTOR FUEL ASSEMBLY Russian patent published in 2020 - IPC G21C3/34

Abstract RU 2726936 C1

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular, to production of spacer grids for fast neutron reactors using welding, and can be used in production of fuel assemblies for power reactors. Method of making spacer grids for a nuclear reactor fuel assembly includes obtaining a thin-walled pipe, cutting it into measuring billets, production of shaped cells from them by stamping, assembly of cells into hexagon, contact spot welding between them and with rim plates; at that, thin-wall tube is made as bimetallic with external layer of ferrite steel and internal one – from ferritic-martensite steel. Ratio of thicknesses of layers makes 1:(1–4) accordingly, thus ferrite phase is formed at welding in zone of cast core.

EFFECT: invention makes it possible to manufacture spacer grids from ferritic-martensitic steels with preservation of high corrosion resistance in liquid metal coolant.

5 cl, 5 dwg

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RU 2 726 936 C1

Authors

Gryaznov Nikolaj Serafimovich

Klinevskij Mikhail Georgievich

Kruglov Oleg Anatolevich

Sorokin Yurij Vasilevich

Smirnov Viktor Pavlovich

Leonteva-Smirnova Mariya Vladimirovna

Naumenko Irina Aleksandrovna

Skupov Mikhail Vladimirovich

Dates

2020-07-17—Published

2019-02-21—Filed