Double-sided cooling annular fuel rod with wrapping wire

A technology of double-sided cooling and fuel rods, which is applied in the field of nuclear power to achieve the effects of improving DNBR, reducing flow resistance, and enhancing safety

Pending Publication Date: 2019-06-25
CHINA INSTITUTE OF ATOMIC ENERGY
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no literature report on the ring-shaped fuel rod with a wire-wrapped structure
At the same time, the structure and material of annular fuel rods are obvi

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
  • Double-sided cooling annular fuel rod with wrapping wire
  • Double-sided cooling annular fuel rod with wrapping wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 with figure 2 As shown, a double-sided cooling annular fuel rod with wire wrapping described in the present invention includes an upper end plug 1, a lower end plug 6, an inner cladding 2, an outer cladding 3, and an annular fuel pellet 5; wherein , the cavity formed by nesting the inner cladding 2 and the outer cladding 3 is used to accommodate the annular fuel pellet 5, the upper end of the inner cladding 2 and the outer cladding 3 are connected to the upper end plug 1, and the lower end is connected to the lower end plug 6;

[0033] A winding wire 9 is wound on the outer surface of the outer casing 3 , that is, the winding wire 9 is spirally wound on the outer surface of the outer casing 3 . One end of the winding wire 9 is fixed on the lower end plug 6 by welding; the other end is fixed on the upper end plug 1 by welding.

[0034] The upper or lower end plug 6 of the tubular fixing member 7 is provided with 2 to 6 side openings away from the weld...

Embodiment 2

[0040] Such as figure 1 with figure 2 As shown, a double-sided cooling annular fuel rod with wire wrapping described in the present invention includes an upper end plug 1, a lower end plug 6, an inner cladding 2, an outer cladding 3, and an annular fuel pellet 5; wherein , the cavity formed by nesting the inner cladding 2 and the outer cladding 3 is used to accommodate the annular fuel pellet 5, the upper end of the inner cladding 2 and the outer cladding 3 are connected to the upper end plug 1, and the lower end is connected to the lower end plug 6;

[0041] Three winding wires 9 are wound on the outer surface of the outer casing 3 , that is, the winding wires 9 are spirally wound on the outer surface of the outer casing 3 . One end of the winding wire 9 is fixed on the lower end plug 6 by welding; the other end is fixed on the upper end plug 1 by welding.

[0042] The lower end plug 6 of the annular fuel rod is fixed on the lower tube seat through a tubular fixing member 7 ...

Embodiment 3

[0050] Such as figure 1 with figure 2 As shown, a double-sided cooling annular fuel rod with wire wrapping described in the present invention includes an upper end plug 1, a lower end plug 6, an inner cladding 2, an outer cladding 3, and an annular fuel pellet 5; wherein , the cavity formed by nesting the inner cladding 2 and the outer cladding 3 is used to accommodate the annular fuel pellet 5, the upper end of the inner cladding 2 and the outer cladding 3 are connected to the upper end plug 1, and the lower end is connected to the lower end plug 6;

[0051] Three winding wires 9 are wound on the outer surface of the outer casing 3, that is, the winding wires 9 are spirally wound on the outer surface of the outer casing 3: one end of the winding wire 9 is fixed on the lower end plug 6 by welding; It is fixed on the upper end plug 1 by welding.

[0052] The ratio of the pitch of the winding wire to the length of the annular fuel rod is 1:8. The material of the winding wire...

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
Diameteraaaaaaaaaa
Login to view more

Abstract

The present invention provides a double-sided cooling annular fuel rod with a wrapping wire. The annular fuel rod comprises an upper end plug, a lower end plug, an inner cladding, an outer cladding and an annular fuel pellet, wherein a cavity formed by nesting the inner cladding and the outer cladding is used is for accommodating the annular fuel pellet, the upper parts of the inner cladding and the outer cladding are connected with the upper end plug, and the lower parts of the inner cladding and the outer cladding are connected with the lower end plug; the outer surface of the outer claddingis wound with one or more wrapping wires, that is the wrapping wire(s) is/are spirally wound around the outer surface of the outer cladding; and the two ends of the wrapping wire(s) are respectivelyfixed to the upper end plug and the lower end plug. The wrapping wire(s) wound around the annular fuel rod can significantly enhance the lateral flow of a coolant and enhance the heat transfer effectof the fuel rod to the coolant, and turbulent flow of the coolant takes away a large amount of channel heat, so the temperature of the fuel rod is reduced, the DNBR (departure from nucleate boiling ratio) is improved, and the safety of the fuel rod is enhanced.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a fuel rod, and further relates to a double-sided cooling annular fuel rod with wire wrapping. Background technique [0002] During the operation of a nuclear power plant reactor, the performance of nuclear fuel is an important factor affecting the safety and economy of the reactor. Therefore, the research of fuel elements has been placed in a very prominent position in the world. By optimizing the design of fuel elements, adopting advanced structural materials, and improving the manufacturing process of elements, the various performances of nuclear fuel elements are continuously improved, and nuclear power is promoted to be safer and more efficient. direction of economic development. [0003] Usually, nuclear fuel is designed as a solid cylinder, consisting of upper and lower end plugs, pellets, compression springs and cladding. Coolant flows through the cladding to cool ...

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
IPC IPC(8): G21C3/344G21C3/356G21C15/02
CPCY02E30/30
Inventor 张爱民何晓军史宝磊韩智杰刁均辉季松涛张培升邹远方
Owner CHINA INSTITUTE OF ATOMIC ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap