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Joint-stock Company “tvel”

Korea Atomic Energy Research Institute

Federal State Unitary Enterprise, A.a. Bochvar All-russia Research Institute of Inorganic Materials

Vladimir Andreevich Markelov

Vladimir Andreevich Kotrekhov

Anatoly Frantsevich Lositsky

Antonina Vasilievna Nikulina

Jury Pavlovich Shevnin

Mikhail Mikhailovich Peregud

Mikhail Ivanovich Solonin

Nikolai Vasilevich Kuzmenko

Pavel Vasilievich Shebaldov

Vladimir Vladimirovich Novikov

Vadim Nikolaevich Solovev

Nadezhda Konstantinovna Filatova

Vladimir Vladimirovich Rozhdestvensky

Aleksandr Anatolevich Kabanov

Antonina Vasilevna Nikulina

Kirill Vladimirovich Ozhmegov

Mihail Nikolaevich Sablin

Sergei Vladimirovich Chineikin

Aleksandr Gusmanovich Ziganshin

Sergei Vasilevich Lozitckii

Petr Ivanovich Lavrenjuk

Nikolai Alexeevich Ganza

Lidiya Efimovna Ageenkova

Yury Konstantinovich Bibilashvili

Vyacheslav Nikolaevich Shishov

Sung Soo Kim

Yong Moo Cheong

Kyung Soo Im

Young Suk Kim

Vladimir Ivanovich Belov

Tatyana Nikolaevna Zheltkovskaya

Sergei Yurievich Zavodchikov

Method of manufacturing zirconium alloy tubular products containing (wt. %): niobium—0.9-1.7; iron—0.04-0.10; oxygen—0.03-0.10; silicon—less than 0.02, carbon—less than 0.02, and zirconium—as the base of the alloy. This includes an ingot melting by multiple vacuum arc remelting, mechanical processing of the ingot, heating, hot working of the ingot, subsequent mechanical processing for the production of tubular billets, heat treatment of the tubular billets, application of a protective coating and heating to a hot pressing temperature, hot pressing, removal of the protective coating, multi-stage cold radial forging, vacuum thermal treatment, multiple cold rolling runs with a total deformation degree of 50-80-% per run and a tubular coefficient of Q=1.0-2.7 with intermediate vacuum thermal treatment after each cold rolling operation, and final vacuum thermal treatment of the resulting tubular products carried out at the final size with subsequent final finishing operations.

Method of manufacturing zirconium alloy tubular products

A zirconium-based alloy for the components of the active core of nuclear reactors comprises (on a weight percent basis): niobium, 0.5-3.0; iron, 0.005-0.5; oxygen, 0.03-0.2; carbon, 0.001-0.04; silicon, 0.002-0.1; nickel, 0.003-0.02; zirconium being the balance; the alloy structure is characterized by an &agr;-solid solution and the &bgr; Nb-phase particles sized below 0.1 &mgr;m and having the niobium content of from 60 to 95%. The alloy may further comprise particles of intermetallics Zr&mdash;Fe&mdash;Nb with the Fe/Nb ratio of 0.05-0.2. The alloy structure may also be characterized by an oxygen-hardened &agr;-solid solution and by the &bgr; Nb-phase particles, and may further comprise particles of intermetallics Zr&mdash;Fe&mdash;Nb sized below 0.3 &mgr;m.

Zirconium-based alloy elements used in nuclear reactor cores

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Moscow, Russia

Vladimir Andreevich Markelov