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

Accident resistant rod-shaped nuclear fuel element and preparation method thereof

A nuclear fuel element and rod-shaped technology, which is applied in the field of nuclear power, can solve problems such as hindering the export of fuel pellet heat, and achieve the effects of eliminating gaps, increasing uranium loading, and good thermal strength

Active Publication Date: 2019-10-25
上海核工程研究设计院股份有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since there is a certain gap between the fuel pellet and the cladding, this gap hinders the UO 2 Heat removal from fuel pellets

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
  • Accident resistant rod-shaped nuclear fuel element and preparation method thereof
  • Accident resistant rod-shaped nuclear fuel element and preparation method thereof
  • Accident resistant rod-shaped nuclear fuel element and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] refer to Figure 1-4 , an accident-resistant rod-shaped nuclear fuel element, including two end plugs 1, a stainless steel cladding 2 is installed between the two end plugs 1, and a U 3 Si 2 Core 3, and U 3 Si 2 The core 3 is located between the two end plugs 1, the U 3 Si 2 There is a middle hole 5 inside the core body 3, and the U 3 Si 2 Between the core body 3 and the stainless steel cladding 2 is a metallurgical bonding layer 4, and the thickness of the metallurgical bonding layer 4 is not greater than 0.2 mm.

[0033] refer to Figure 5 , a method for preparing an accident-resistant rod-shaped nuclear fuel element, comprising the following steps:

[0034] S1. Prepare U 3 Si 2 Base Ingot: Enrichment of U with Nuclear Grade 235 Metal powder and nuclear-grade pure Si powder are mixed evenly and pressed into blocks, melted in an electric arc furnace, and annealed at 800°C to prepare U 3 Si 2 Ingot;

[0035] S2, prepare U 3 Si 2 Core 3: use U 3 Si 2The...

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

No PUM Login to View More

Abstract

The invention discloses an accident resistant rod-shaped nuclear fuel element which comprises two end plugs, a stainless steel cladding shell is arranged between the two end plugs, a U3Si2 core body is arranged in the stainless steel cladding shell, and the U3Si2 core body is located between the two end plugs, and a middle hole is formed in the U3Si2 core body; the invention further discloses a preparation method of the accident resistant rod-shaped nuclear fuel element. The preparation method of the accident resistant rod-shaped nuclear fuel element includes the following steps that S1, U3Si2based cast ingots are prepared; S2, the U3Si2 core body is prepared; S3, stainless steel tube blank is prepared; S4, cleaning is conducted; S5, element tube blank is prepared; and S6, hot rolling isconducted. The preparation method cancels the gaps among an air storage cavity, a compression spring, a core block and the cladding shell of active elements, a middle hole reserved in the center of the U3Si2 core body can store fission gas and absorb part of the irradiation swelling, the internal part of the element is in the vacuum state rather than fills inert gas, the element cladding shell adopts stainless steel materials, is suitable for the active light water reactor nuclear power plants, compared with the active rod-shaped nuclear fuel element, the accident resistant rod-shaped nuclearfuel element has strong LOCA accident resistant ability and high safety.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to an accident-resistant rod-shaped nuclear fuel element and a preparation method thereof. Background technique [0002] Light water reactors are the main reactor type of nuclear power plants, using rod-shaped nuclear fuel elements. The active rod-shaped nuclear fuel elements are composed of short cylindrical UO 2 Composed of fuel pellets, zirconium alloy cladding, end plugs, compression springs in the gas storage chamber, etc. There is a certain gap between the fuel pellets and the zirconium alloy cladding, and the fuel element is filled with inert gas, such as figure 1 shown. [0003] UO 2 With the advantages of high melting point, high chemical and radiation stability, it has become the most widely used light water reactor nuclear fuel. However, UO 2 The thermal conductivity is low, only about 3.5W·m at 800°C -1 ·K -1 , Therefore, the core temperature of the pellet i...

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): G21C3/07G21C3/04G21C3/16G21C3/28G21C3/58G21C21/02G21C21/10C22C38/06C22C38/22
CPCG21C3/07G21C3/58G21C3/28G21C3/044G21C3/16G21C21/10G21C21/02C22C38/22C22C38/06Y02E30/30
Inventor 李聪丁阳尤丁捷卢俊强韦享雨曾奇锋朱丽兵苗富足周欣
Owner 上海核工程研究设计院股份有限公司
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