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

Tube-in-tube type MA transmutation rod for fast neutron reactor

A fast neutron reactor and sleeve-type technology, applied in the field of sleeve-type MA transmutation rods, can solve the problem of single structure design of transmutation rods

Active Publication Date: 2021-10-08
SOUTHWEAT UNIV OF SCI & TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after literature research, it is found that when the core is arranged non-uniformly, the structural design of the transmutation rods in the MA transmutation assembly is relatively simple, mainly because the MA nuclides are directly made into transmutation rods with the same size as the fuel assembly. 6 LiD is a material that can convert low-energy thermal neutrons into high-energy fast neutrons around 14MeV. The specific process is thermal neutrons and neutrons. 6 Li reacts to produce tritons (T) with sufficient energy, and then T is combined with deuterons (D) or 6 Li fusion reaction releases high-energy fast neutrons

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
  • Tube-in-tube type MA transmutation rod for fast neutron reactor
  • Tube-in-tube type MA transmutation rod for fast neutron reactor
  • Tube-in-tube type MA transmutation rod for fast neutron reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 1 A casing-type MA transmutation rod for a fast neutron reactor is shown, the center layer of which is the MA nuclide tube 1, the thickness of the MA nuclide tube 1 is 4 mm, and the outer layer is a single-layer structure 6 LiD nuclide tube 2, 6 The thickness of the LiD nuclide tube 2 is 1mm, and the density of each transmutation rod is 10.41g / cm 3 , the radius is 5mm, and the mass of MA nuclide tube 1 in each MA transmutation rod is 313.50g; the nuclide composition of MA nuclide tube 1 includes 237 Np, 241 Am, 243 Am, 244 Cm, where 237 The mass proportion of Np is 56.2%, 241 The mass proportion of Am is 26.4%, 243 The mass proportion of Am is 12%, 244 The mass proportion of Cm is 5.4%.

Embodiment 2

[0055] Such as figure 2 A sleeved MA transmutation rod for a fast neutron reactor is shown, the central layer of which is the MOX nuclide tube 3, the thickness of the MOX nuclide tube 3 is 1.5mm, and the outer layer includes the first outer layer and the surrounding setting In the second outer layer outside the first outer layer, the first outer layer is the MA nuclide tube 4, the thickness of the MA nuclide tube 4 is 3mm, and the second outer layer is 6 LiD nuclide tube 5, 6 The thickness of the LiD nuclide tube 5 is 0.5mm, and the density of each transmutation rod is 10.41g / cm 3 , the radius is 5mm, and the mass of the MA nuclide tube 4 in each transmutation rod is 352.68g; the nuclide composition of the MA nuclide tube 4 includes 237 Np, 241 Am, 243 Am, 244 Cm, where 237 The mass proportion of Np is 56.2%, 241 The mass ratio of Am is 26.4%, 243 The mass proportion of Am is 12%, 244 The mass proportion of Cm is 5.4%; the constituent nuclides of the MOX nuclide tube...

Embodiment 3

[0057] Such as image 3 A casing-type MA transmutation rod for a fast neutron reactor is shown, the central layer of which is the MOX nuclide tube 6, the thickness of the MOX nuclide tube 6 is 4mm, the outer layer is the MA nuclide tube 7, and the MA core The thickness of the plain tube 7 is 1mm, and the density of each transmutation rod is 10.41g / cm 3 , the radius is 5mm, and the mass of the MA nuclide tube 7 in each transmutation rod is 176.34g; the nuclide composition of the MA nuclide tube 7 includes 237 Np, 241 Am, 243 Am, 244 Cm, where 237 The mass proportion of Np is 56.2%, 241 The mass proportion of Am is 26.4%, 243 The mass proportion of Am is 12%, 244 The mass proportion of Cm is 5.4%; the constituent nuclides of the MOX nuclide tube include 238 U 235 U 238 Pu, 239 Pu, 240 Pu, 241 Pu and 242 Pu, of which, 238 U 235 The ratio of U is 0.003:1, 238 Pu, 239 Pu, 240 Pu, 241 Pu and 242 The ratio of Pu is 0.009:0.615:0.220:0.29750.119:0.041.

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 a tube-in-tube type MA transmutation rod for a fast neutron reactor. The tube-in-tube type MA transmutation rod comprises a central layer which is externally provided with at least one outer layer in a surrounding manner, wherein the central layer is an MA nuclide tube, and the outer layer is a 6LiD nuclide tube, or the central layer is an MOX nuclide tube, and the outer layer is the MA nuclide tube and / or the 6LiD nuclide tube. According to the tube-in-tube type MA transmutation rod for the fast neutron reactor, a thermal fast neutron conversion material 6LiD is creatively added into the structural design of the MA transmutation rod. The invention provides three schemes of the basic structure of the transmutation rod, namely (1) a 6LiD / MA tube-in-tube type transmutation rod; (2) a 6LID / MA / MOX tube-in-tube type transmutation rod; and (3) an MA / MOX tube-in-tube type transmutation rod. The thicknesses of the tube walls of 6LiD, MA and MOX fuel in each scheme are continuously optimized, so a novel transmutation rod structure for disposing MA nuclide is provided, and the transmutation rate of the transmutation rod containing MA nuclide is improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor components, and more specifically, the invention relates to a sleeved MA transmutation rod for fast neutron reactors. Background technique [0002] Minor Actinides (MA nuclides) produced during the utilization of nuclear energy have a half-life of several million years. They are the main source of high-level radioactive waste and have a great impact on the human living environment. How to properly dispose of MA nuclides Factors are the focus of research all over the world. At present, separation-transmutation is an internationally recognized method for dealing with long-lived high-level radioactive waste, and fast neutron reactors are the most ideal reactor type for transmutation of high-level radioactive waste. Putting out waste means a lot. [0003] Radioactive waste can be divided into low-, medium-, and high-level radioactive waste according to the level of radioactivity, and short-,...

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(China)
IPC IPC(8): G21C5/02G21C5/14G21F9/28
CPCG21C5/02G21C5/14G21F9/28Y02E30/30
Inventor 叶滨李杰唐逸
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