Molten salt corrosion resistant high-temperature composite material and reactor core structural part of molten salt reactor

A technology of molten salt corrosion and composite materials, applied in the field of metal-based reinforcing materials, can solve the problems of inability to meet the needs of long-term use, poor high temperature mechanical properties, difficult to replace, etc., to improve high temperature radiation resistance, good plasticity, Avoid swollen effects

Active Publication Date: 2017-08-11
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a large number of small alloy structural parts in the core, including instrument control tubes that can measure neutron energy spectrum, flux rate, temperature, etc. These structural parts play a key role in the safe operation of the reactor and normal power generation, and are not easy to replace
The weak mechanical properties of Hastelloy N cannot meet its long-term use requirements
Thirdly, in terms of design standards, only when the operating temperature of a commercial molten salt reactor reaches about 750°C can it pro

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
  • Molten salt corrosion resistant high-temperature composite material and reactor core structural part of molten salt reactor
  • Molten salt corrosion resistant high-temperature composite material and reactor core structural part of molten salt reactor
  • Molten salt corrosion resistant high-temperature composite material and reactor core structural part of molten salt reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Although nickel-based alloys have been explored for use in molten salt reactors as early as the 1960s, nickel easily undergoes a transmutation reaction with neutrons to generate helium, which in turn forms helium bubbles inside the nickel-based alloy. The massive accumulation of helium bubbles at the grain boundaries will reduce the bonding force between the alloy grain boundaries and cause direct embrittlement of the material; the helium bubbles formed inside the alloy grains will pin the free movement of the dislocation lines, resulting in hardening and hardening of the alloy. Embrittlement; the formation of helium bubbles will also cause swelling of the material, which will affect the service performance of the alloy. In addition, ORNL's report also clearly pointed out that the maximum allowable temperature of Hastelloy N alloy is only 704°C. Combined with its helium embrittlement problem, it clearly opposes the use of nickel-based alloys in the core. Per Peterson poi...

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
Granularityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a molten salt corrosion resistant high-temperature composite material, and belongs to the technical field of metal based reinforcing materials. The molten salt corrosion resistant high-temperature composite material takes 0.5-1.5wt% of nano silicon carbide particles as a reinforcing body, takes 10-20wt% of molybdenum as an additive and takes the balance of nickel as a metal matrix. The invention further discloses a reactor core structural part of a molten salt reactor. The composite material disclosed by the invention can form strengthening effects such as dispersion strengthening of nano silicon carbide particles, solid solution strengthening of molybdenum atoms as well as precipitation strengthening of trinickel silicon nano-sized precipitates (2-5 nm), so that mechanical strength of the matrix is greatly improved, and the obtained composite material has excellent high-temperature strength characteristic, high-temperature irradiation resistance and fluoride salt corrosion resistance, and is a structural material suitable for the reactor core of the molten salt reactor.

Description

Technical field [0001] The invention relates to a high-temperature composite material resistant to molten salt corrosion, belonging to the technical field of metal-based reinforced materials. Background technique [0002] The molten salt reactor has been selected as one of the fourth-generation nuclear reactor concepts for its high inherent safety, economy, non-stop refueling, and low vapor pressure in the primary circuit. However, the high temperature, strong neutron irradiation, and highly corrosive service environment in the molten salt reactor pose challenges to the alloy structural materials in the reactor. Existing reactor alloy structural materials, such as various iron-based alloys used in light water reactors and high-temperature gas-cooled reactors, cannot meet the requirements of molten salt reactors because iron is not resistant to fluoride molten salt corrosion. Since the early 1950s, the United States has spent a lot of manpower and financial resources to develop s...

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): C22C19/03C22C32/00C22C1/05
CPCC22C1/05C22C19/03C22C32/0063
Inventor 杨超黄鹤飞周兴泰
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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