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Experiment simulation device, system and preparation method for fine-bundle type fuel assembly

A technology of fuel assembly, experimental simulation, applied in the field of nuclear installations

Active Publication Date: 2017-09-19
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The United States, France, Germany and other countries have carried out some researches on the thermal-hydraulic characteristics of rod bundle fuel assemblies, but most of them are researches on large-diameter rod bundles or single round tubes, and most of the public reports are analysis of the test results of rod bundle components. , numerical calculation, etc., there is no report on the experimental simulation device for high-temperature and high-pressure thin rod bundle fuel assemblies

Method used

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  • Experiment simulation device, system and preparation method for fine-bundle type fuel assembly
  • Experiment simulation device, system and preparation method for fine-bundle type fuel assembly
  • Experiment simulation device, system and preparation method for fine-bundle type fuel assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 As shown, a thin rod bundle fuel assembly integrated experimental simulation device includes a conductive head 1, a heating element 2, and a conductive assembly connected in sequence from top to bottom; the conductive head 1 is provided with a through hole for connecting the heating element 2 6. The upper surface of the through hole 6 is an inverted tapered surface, and the bottom of the conductive head 1 is provided with an annular tenon surface 8, and there are two annular tenon surfaces 8, which are arranged symmetrically with the through hole 6 as the center.

Embodiment 2

[0030] The heating element 2 is composed of a first cold section element 10, a hot section element 11, and a second cold section element 12 connected sequentially from top to bottom. Between the first cold section element 10 and the hot section element 11, the hot section element 11 and the second cold section element 12 are welded together.

[0031] The gap between the first cold segment element 10 and the hot segment element 11 is 0.5-0.8 mm, and the gap between the hot segment element 11 and the second cold segment element 12 is 0.5-0.8 mm.

[0032] The mechanical strength of the first cold section element 10 is stronger than that of the hot section element 2 , but the resistance of the first cold section element 10 is smaller than that of the hot section element 11 .

[0033] The first cold section element 10 is a Ni6 pipe, the hot section element 11 is a 0Cr18Ni10Ti pipe, and the second cold section element 12 is a T2 rod.

Embodiment 3

[0035] The conductive component includes a conductive copper braid 4 connected under the heating element 2 , and a conductive block 5 is also connected under the conductive copper braid 4 .

[0036] Both sides of the conductive head 1 are provided with hoisting holes 7, and the bottom of the conductive head 1 is provided with positioning holes 9. There are two positioning holes 9 and are arranged symmetrically with the through hole 6 as the center. The heating element 2 is provided with a positioning grid 3 .

[0037] The heating element 2 is set 8-12 mm out of the upper surface of the conductive head 1 .

[0038] Example 3

[0039] An integrated experimental simulation device system for thin bundle fuel assemblies, including the integrated experimental simulation device for thin bundle fuel assemblies as described above, a pressure bearing part for bearing pressure is also arranged under the conductive head 1, and the bearing The gap between the pressing piece and the annul...

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PUM

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Abstract

The present invention discloses an experiment simulation device for a fine-bundle type fuel assembly. The device comprises a conductive head, a heating element and a conductive assembly, wherein the conductive head, the heating element and the conductive assembly are sequentially connected from top to bottom. The conductive head is provided with a through hole for being connected with the heating element. The upper surface of the through hole is in the form of an inverted conical surface. Two annular tongue surfaces are arranged below the conductive head and are symmetrically arranged with the through hole as a center of symmetry. According to the technical scheme of the invention, the device can bear high-temperature and high-pressure conditions. By means of the device, the geometric construction and the nuclear heat release characteristics of a prototype fuel assembly can be simulated. Therefore, the experimental research on the flowing condition, the heat transfer condition and the thermohydraulics of the fine-bundle type fuel assembly can be conducted.

Description

technical field [0001] The invention relates to the field of nuclear devices, in particular to a thin rod bundle fuel assembly experimental simulation device and a preparation method thereof. Background technique [0002] The thermal-hydraulic characteristics of reactor fuel assemblies are an important research content of fuel assembly performance. The research on thermal-hydraulic characteristics of fuel assemblies is of great significance to the design demonstration of fuel assemblies and the improvement of the comprehensive performance of assemblies. In order to improve the performance of the core fuel assembly and optimize its design, thermal hydraulic analysis and experimental research have been carried out in various countries. Bundle fuel assemblies are commonly used in nuclear reactors, and the core structures of floating nuclear power plants and marine nuclear power reactors can also be modeled as bundle channels. play a vital role. [0003] Studies have shown tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/20
CPCG09B23/20
Inventor 谢峰徐建军黄彦平毕景良荚川
Owner NUCLEAR POWER INSTITUTE OF CHINA
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