Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Zirconium based alloys having excellent creep resistance

a zirconium-based alloy and creep-resistant technology, applied in the field of zirconium-based alloy composites, can solve the problems of reaching the limit of use of conventional zircaloy-4 cladding tubes, zircaloy-4 cladding tubes are faced with difficulties in use, etc., and achieve excellent creep resistance, reducing creep deformation, and high stability and economic efficiency.

Inactive Publication Date: 2006-08-10
KOREA ATOMIC ENERGY RES INST +1
View PDF21 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030] An object of the present invention is to provide a zirconium alloy having an excellent creep resistance, which has higher stability and economical efficiency than a conventional material, by minimizing creep deformation of cladding tube or reactor core structures during the operation of light or heavy water reactor in the nuclear power plant.

Problems solved by technology

However, the conventional Zircaloy-4 cladding tube is faced with difficulties in use, because the nuclear power plant is being operated in the condition of high inflammation, long-term period, high temperature coolant and high pH, for the improvement of economical efficiency.
However, nuclear power plants are presently operated in a severe condition to increase the economical efficiency, and thereby a nuclear cladding tube manufactured with conventional alloy such as Zircaloy-4 reached the limit of use.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Zirconium based alloys having excellent creep resistance
  • Zirconium based alloys having excellent creep resistance
  • Zirconium based alloys having excellent creep resistance

Examples

Experimental program
Comparison scheme
Effect test

example [UNK]

EXAMPLE 1˜13

Manufacturing Method of Zirconium Alloy

[0053] Four examples of alloy with niobium content from 0.8% to 1.8%: [0054] (1) Zr—0.8% Nb—0.07% Cu—0.14% O—0.008% C—0.008% Si—0.002% S; [0055] (2) Zr—1.1% Nb—0.07% Cu—0.14% O—0.008% C—0.008% Si—0.002% S; [0056] (3) Zr—1.5% Nb—0.07% Cu—0.14% O—0.008% C—0.008% Si—0.002% S; and [0057] (4) Zr—1.8% Nb—0.07% Cu—0.14% O—0.008% C—0.008% Si—0.002% S

[0058] Alloy of Zr—1.5% Nb—0.4% Sn: [0059] (5) Zr—1.5% Nb—0.4% Sn—0.14% O—0.008% C—0.008% Si—0.002% S

[0060] Four examples of alloy manufactured by adding one or more elements from Cu, Fe, and Cr to the above alloy containing Zr—1.5% Nb—0.4% Sn: [0061] (6) Zr—1.5% Nb—0.4% Sn—0.1% Cu—0.14% O—0.008% C—0.008% Si —0.002% S; [0062] (7) Zr—1.5% Nb—0.4% Sn—0.1% Fe—0.14% O—0.008% C—0.008% Si —0.002% S; [0063] (8) Zr—1.5% Nb—0.4% Sn—0.1% Cu—0.1% Fe—0.14% O—0.008% C—0.008% Si—0.002% S; and [0064] (9) Zr—1.5% Nb—0.4% Sn—0.2% Fe—0.1% Cr—0.14% O—0.008% C—0.008% Si—0.002% S

[0065] Four examples of alloy wit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
pressureaaaaaaaaaa
creep resistanceaaaaaaaaaa
mechanical propertiesaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a zirconium based alloy composite having an excellent creep resistance and, more particularly, to a zirconium based alloy composite finally heat-treated to have the degree of recrystallization in the range of 40˜70% in order to improve the creep resistance. The zirconium based alloy comprises 0.8˜1.8 wt. % niobium (Nb); 0.38˜0.50 wt. % tin (Sn); one or more elements selected from 0.1˜0.2 wt. % iron (Fe), 0.05˜0.15 wt. % copper (Cu), and 0.12 wt. % chromium (Cr); 0.10˜0.15 wt. % oxygen (O); 0.006˜0.010 wt. % carbon (C); 0.006˜0.010 wt. % silicon (Si); 0.0005˜0.0020 wt. % sulfur (S); and the balance zirconium (Zr). The zirconium alloy manufactured with the composition in accordance with the present invention has an excellent creep resistance compared to a conventional Zircaloy-4, and may effectively be used as a nuclear cladding tube, supporting lattice and inner structures of reactor core in the nuclear power plant utilizing light or heavy water reactor.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a zirconium based alloy composite having an excellent creep resistance and, more particularly, to a zirconium based alloy composite finally heat-treated to have a degree of recrystallization in the range of 40˜70% in order to improve the creep resistance. The zirconium based alloy composite comprises 0.8˜1.8 wt. % niobium (Nb); 0.38˜0.50 wt. % tin (Sn); one or more elements selected from 0.1˜0.2 wt. % iron (Fe), 0.05˜0.15 wt. % copper (Cu), and 0.12 wt. % chromium (Cr); 0.10˜0.15 wt. % oxygen (O); 0.006˜0.010 wt. % carbon (C); 0.006˜0.010 wt. % silicon (Si); 0.0005˜0.0020 wt. % sulfur (S); and the balance zirconium (Zr). [0003] 2. Description of the Prior Art [0004] A nuclear fuel cladding tube for nuclear power plant is one of the important parts for nuclear reactor core. The cladding tube confines nuclear fuel and prevents nuclear fission products from flowing into cooling water. T...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): C22C16/00
CPCC22C16/00C22F1/186
Inventor JEONG, YONG HWANBAEK, JONG HYUKCHOI, BYOUNG KWONPARK, SANG YOONLEE, MYUNG HOBANG, JE GEONPARK, JEONG YONGKIM, JUN HWANKIM, HYUN GILJUNG, YOUN HO
Owner KOREA ATOMIC ENERGY RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com