Unlock instant, AI-driven research and patent intelligence for your innovation.

Double-row hexagonal fuel assembly for supercritical water-cooled reactor

A fuel assembly and hexagonal technology, applied in the assembly of fuel elements, reactors, moderator/core structures, etc., can solve the problem of not forming a product and assembly layout scheme, small assembly size and fuel loading, and reducing assembly Neutron economics and other issues, to achieve the effect of improving sufficient moderation capacity, suppressing power density, and improving uniform moderation

Active Publication Date: 2013-01-02
NUCLEAR POWER INSTITUTE OF CHINA
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, zirconium hydride moderator materials and stainless steel neutron absorbers are used in the components, which increases the complexity of the structural design of the components and reduces the neutron economy of the components; secondly, the mentioned component scheme uses thin fuel rods, the components The size and fuel loading are small, which is not conducive to the arrangement of the control rod drive mechanism and the fuel loading arrangement of the core; in addition, the scheme in this paper does not consider the structural performance and thermal performance of the components, the thickness of the component box wall and the thickness of the moderator box wall in the component etc. do not have engineering feasibility
The article is only a simple comparison of various possible arrangements, and does not form an actual product and component arrangement plan

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-row hexagonal fuel assembly for supercritical water-cooled reactor
  • Double-row hexagonal fuel assembly for supercritical water-cooled reactor
  • Double-row hexagonal fuel assembly for supercritical water-cooled reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as Figure 5 As shown, a double-row hexagonal fuel assembly applied to a supercritical water-cooled reactor uses multiple hexagonal moderator channels 5 inside, and multiple trapezoidal moderator channels 4 on the edges. Two layers of fuel rods 3 are arranged between the trapezoidal moderator channels 5, and positioning parts 1 are arranged at the empty water gaps on both sides of the trapezoidal moderator channels 4; the structural materials, guide tubes, cladding and box wall materials in the assembly All use Inconel718 or stainless steel 310S; the wall thickness of the hexagonal moderator channel 5 box and the trapezoidal moderator channel 4 box can be 0.8-1.8 mm, and the component box wall thickness is 1-2 mm; more preferably, in this embodiment The wall thickness of the hexagonal moderator channel 5 box and the trapezoidal moderator channel 4 box are both 0.8mm, and the component box wall thickness is 1mm.

[0039] The diameter of the fuel rod 3 is D=10.2mm, ...

Embodiment 2

[0044] Such as Figure 6 As shown, a double-row hexagonal fuel assembly applied to a supercritical water-cooled reactor uses multiple hexagonal moderator channels 5 inside, and multiple trapezoidal moderator channels 4 on the edges. Two layers of fuel rods 3 are arranged between the trapezoidal moderator channels 5, and the positioning part 1 is arranged at the empty water gap near the trapezoidal moderator channel 4; the structural materials, guide tubes, cladding and box wall materials in the assembly are Adopt Inconel718 or stainless steel 310S; the wall thickness of the hexagonal moderator channel 5 and the trapezoidal moderator channel 4 can be 0.8-1.8 mm, and the component box wall thickness is 1-2 mm; more preferably, the six in this embodiment The wall thickness of the side-shaped moderator channel 5 box and the trapezoidal moderator channel 4 box are both 0.8mm, and the component box wall thickness is 1mm.

[0045] The diameter of the fuel rod 3 is D=8.0mm, the P / D (...

Embodiment 3

[0049] Such as Figure 7 As shown, a double-row hexagonal fuel assembly applied to a supercritical water-cooled reactor uses multiple hexagonal moderator channels 5 inside, and multiple trapezoidal moderator channels 4 on the edges. Two layers of fuel rods 3 are arranged between the trapezoidal moderator channels 5, and the positioning part 1 is arranged at the empty water gap near the trapezoidal moderator channel 4; the structural materials, guide tubes, cladding and box wall materials in the assembly are Adopt Inconel718 or stainless steel 310S; the wall thickness of the hexagonal moderator channel 5 and the trapezoidal moderator channel 4 can be 0.8-1.8 mm, and the component box wall thickness is 1-2 mm; more preferably, the six in this embodiment The wall thickness of the side-shaped moderator channel 5 box and the trapezoidal moderator channel 4 box are both 0.8mm, and the component box wall thickness is 1mm.

[0050] The diameter of described fuel rod 3 is D=8.0mm, and...

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 belongs to the technical field of nuclear reactor fuel assemblies, particularly relates to a double-row hexagonal fuel assembly for a supercritical water-cooled reactor, and aims at providing a fuel assembly with better uniform and full moderation capability and a local power peak value as low as possible. A plurality of hexagonal moderator channels are arranged inside a hexagonal assembly box of the fuel assembly; two layers of fuel rods are arranged between the adjacent hexagonal moderator channels; a central hexagonal moderator channel which has the same structure with the hexagonal assembly box and is scaled down is arranged in the center of the hexagonal assembly box; continuously and repeatedly arrayed hexagonal moderator channels are arranged on each side of the central hexagonal moderator channels; and a plurality of trapezoid moderator channels are arranged on the edges of the assembly. In the double-row hexagonal fuel assembly provided by the invention, the twolayers of fuel rods are arranged between the adjacent hexagonal moderator channels, thus the defect that the single row of fuel rods has weak moderation capability to the fuel rods close to the assembly box is overcome and the moderation effect of the fuel rods at angular points of the moderator channels is improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor fuel assemblies, and in particular relates to a double-row hexagonal fuel assembly applied to a supercritical water-cooled reactor. Background technique [0002] Due to the large enthalpy rise and low power density of supercritical water, the design of supercritical water-cooled reactor (SCWR) components involves strong physical-thermal coupling. The neutron economy and structural complexity of the components will directly affect the economy of the SCWR core, and the economic advantages of the SCWR core are mainly reflected in the high thermal efficiency of the system and the simplification of equipment. In order to obtain a higher coolant outlet temperature and improve the thermal efficiency of the system, it is necessary to flatten the power distribution in the module as much as possible and reduce the local power peak factor. In order to effectively reduce the local power peak factor, ...

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 Patents(China)
IPC IPC(8): G21C3/32G21C5/14
CPCY02E30/40Y02E30/30
Inventor 王连杰秦冬李庆于颖锐夏榜样
Owner NUCLEAR POWER INSTITUTE OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com