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

Processing method of radioactive graphite

A treatment method and radioactive technology, applied in the field of radioactive graphite treatment, can solve the problems of harsh treatment conditions and complicated processes, and achieve the effects of large treatment capacity, simple process and good application prospects.

Inactive Publication Date: 2017-03-22
SOUTHWEAT UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a treatment method for radioactive graphite in view of the shortcomings of the existing radioactive graphite treatment process, such as complicated process and harsh treatment conditions.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) The block radioactive graphite used in the nuclear reaction is pulverized, and the particle size of the pulverized radioactive graphite is 30mm to 60mm;

[0023] (2) Put 2kg of pulverized radioactive graphite into a microwave sintering furnace, heat it from room temperature 28°C to 1800°C at a heating rate of 20°C / min under air atmosphere and normal pressure, and then keep it at 1800°C for 80min .

[0024] (3) Turn off the power and let it cool down to room temperature naturally. The gas and dust produced by the reaction are collected by adsorption and filtration according to their particle size.

[0025] The radioactive graphite in this embodiment is fully burned to generate gas, and the removal rate is over 98%.

Embodiment 2

[0027] (1) The block radioactive graphite used in the nuclear reaction is pulverized, and the particle size of the pulverized radioactive graphite is 0.5 mm to 5 mm;

[0028] (2) Put 1kg of pulverized radioactive graphite into a microwave sintering furnace, heat it from room temperature 28°C to 1200°C at a heating rate of 50°C / min under air atmosphere and normal pressure, and then keep it at 1200°C for 50min .

[0029] (3) Turn off the power and let it cool down to room temperature naturally. The gas and dust produced by the reaction are collected by adsorption and filtration according to their particle size.

[0030] The radioactive graphite in this embodiment is fully burned to generate gas, and the removal rate is over 98%.

Embodiment 3

[0032] (1) The block radioactive graphite used in the nuclear reaction is pulverized, and the particle size of the pulverized radioactive graphite is 0.5 mm to 60 mm;

[0033] (2) Put 3kg of pulverized radioactive graphite into a microwave sintering furnace, heat it from room temperature 28°C to 2000°C at a heating rate of 80°C / min under air atmosphere and normal pressure, and then keep it at 2000°C for 100min .

[0034] (3) Turn off the power and let it cool down to room temperature naturally. The gas and dust produced by the reaction are collected by adsorption and filtration according to their particle size.

[0035] The radioactive graphite in this embodiment is fully burned to generate gas, and the removal rate is over 98%.

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a processing method of radioactive graphite, and belongs to the field of radioactive waste processing. According to the method, a microwave sintering technology is adopted to process the radioactive graphite. The processing method is simple in operation, high in processing efficiency, good in repeatability, safe and reliable, energy conservation and environment protection are achieved, and the method can be widely used for massive processing of the radioactive graphite produced in a nuclear reactor and other related fields.

Description

technical field [0001] The invention relates to the field of radioactive waste treatment, in particular to a treatment method for radioactive graphite. Background technique [0002] Since the first reactor was built in the United States in 1942, there have been more than 100 graphite nuclear reactors around the world. In reactors, graphite is generally used as neutron moderator, reflector, fuel jacket or container for nuclear fuel. The volume comprised by the graphite is often the same size as the core itself, which may contain 2000t of graphite in a typical moderated reactor. Such as: the Magnox pile in the UK, the largest has 3000t of graphite. Russia's plutonium production reactor has 900t to 1340t graphite per core. The UK, which is a major owner of graphite, has 26 Magonx reactors and 14 AGR reactors, as well as 10 research reactors, with about 60,000 tons of graphite. With the long operation time, most of the graphite piles have begun to age, some of them have been...

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): G21F9/32
CPCG21F9/32
Inventor 卢喜瑞舒小艳丁艺段涛李怀良马登生
Owner SOUTHWEAT UNIV OF SCI & TECH
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