Zirconium alloy composition having excellent corrosion resistance for nuclear applications and method of preparing the same

a technology of zirconium alloys and corrosion resistance, which is applied in the direction of nuclear elements, nuclear fuel reduction, and greenhouse gas reduction, etc., can solve the problems of increasing the number of severe corrosion of nuclear fuel, the development of zirconium alloys, and the need for zirconium alloys, etc., to achieve excellent corrosion resistance, excellent corrosion resistance, and excellent corrosion resistance
US20080131306A1Inactive Publication Date: 2008-06-05KOREA ATOMIC ENERGY RES INST +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KOREA ATOMIC ENERGY RES INST
Publication Date
2008-06-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a zirconium alloy composition having excellent corrosion resistance for nuclear applications and a method of preparing the same. The zirconium alloy composition having excellent corrosion resistance for nuclear applications includes 1.3˜2.0 wt % of niobium, 0.05˜0.18 wt % of iron, 0.008˜0.012 wt % of silicon, 0.008˜0.012 wt % of carbon, and 0.1˜0.16 wt % of oxygen, with the balance being zirconium, or includes 2.8˜3.5 wt % of niobium, 0.2˜0.7 wt % of at least one of iron and copper, 0.008˜0.012 wt % of silicon, 0.008˜-0.012 wt % of carbon, and 0.1˜0.16 wt % of oxygen, with the balance being zirconium. The zirconium alloy composition according to the present invention, in which the amount of niobium, acting as a first alloying element, and the amount of at least one of iron and copper, acting as a second alloying element, are appropriately controlled, and silicon, carbon and oxygen are added in appropriate amounts, can exhibit excellent corrosion resistance, and thus can be usefully used as materials for nuclear fuel cladding tubes, support ribs, and core components of light water reactors and heavy water reactors.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a zirconium alloy composition having excellent corrosion resistance for nuclear applications and to a method of preparing the same.

[0003] 2. Description of the Related Art

[0004] During the last several decades, zirconium alloys, which have a small neutron absorption cross section and excellent corrosion resistance and mechanical properties, have been widely used as materials for nuclear fuel cladding tubes, nuclear fuel assembly support grids, and structural components in pressurized water reactors (PWRs) and boiling water reactors (BWRs). Among zirconium alloys developed to date, particularly useful are Zircaloy-2 (1.20˜1.70 wt % of tin, 0.07˜0.20 wt % of iron, 0.05˜1.15 wt % of chromium, 0.03˜0.08 wt % of nickel, 900˜1500 ppm of oxygen, and the balance being zirconium) and Zircaloy-4 (1.20˜1.70 wt % of tin, 0.18˜0.24 wt % of iron, 0.07˜1.13 wt % of chromium, 900˜1500 ppm of oxygen, less ...

Claims

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