An Arranged Rod Bundle Positioning Structure for Reactor Thermal-Hydraulic Experiments

A technology of thermal hydraulics and positioning structure, which is applied in the direction of reactors, reactor fuel elements, nuclear engineering, etc., can solve the problems of high cost and difficult positioning, and achieve the effect of low cost, reasonable overall structure and avoiding burning

Active Publication Date: 2018-03-30
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a positioning structure for arrayed rod bundles applied to a thermal hydraulic experiment of a reactor, to solve the problems of difficult positioning and high cost of the current rod bundle fuel assemblies in the test, and to simplify the structure while maintaining the experimental performance the goal of

Method used

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  • An Arranged Rod Bundle Positioning Structure for Reactor Thermal-Hydraulic Experiments
  • An Arranged Rod Bundle Positioning Structure for Reactor Thermal-Hydraulic Experiments

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Embodiment

[0021] like Figures 1 to 2 The schematic diagram shown is an arrangement rod bundle positioning structure for reactor thermal hydraulic experiments, including four jacket pieces 1, a total of 4 pieces, jacket piece 1 includes a pair of long pieces and a pair of short pieces, and the short pieces are vertically welded on a pair of Between the long pieces; a rectangular socket is set in the middle of the jacket piece 1, and its height H should take into account the support strength and the influence on the flow, and should not be too small or too large, preferably between 20~40mm; To reduce the obstruction to the flow field, the sheath piece 1 is welded to form a square cavity structure, an inner fixing ring 2 is arranged on the axis of the sheath piece 1, and four heating rod bundles 3 are arranged on the inner side of the sheath piece 1, and the heating rod bundle 3. The two adjacent sheath pieces 1 are fixed tangentially to the inner fixing ring 5; the outside of the sheath ...

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Abstract

The invention discloses a positioning structure for arrangement of rod bundles in thermal hydraulic experiments of reactors. Four heating rod bundles are arranged, and the heating rod bundle is fixed tangentially to the inner fixing ring through two adjacent jacket pieces; the outer side of the jacket piece is fixed on the side wall of the flow channel through an equidistant piece. The invention is capable of generating rotation, causing reasonable disturbance in heating, avoiding local burning, reasonable overall structure, suitable for hydraulic experiments of rod bundle fuel assemblies, strong replaceability, and low cost, compared with the standard As far as the frame itself is concerned, the cost is only about 20%, which ensures the reliability of positioning.

Description

technical field [0001] The invention relates to the field of thermal-hydraulic experiments of reactors, in particular to a positioning structure for arranging rod bundles in thermal-hydraulic experiments of reactors. Background technique [0002] In water-cooled nuclear power reactors, zirconium alloys are used as cladding materials for nuclear fuel elements. When the reactor is running, the fuel of the element core will release radioactive fission gas, and the action of the fission product iodine (I) and the stress will lead to stress corrosion cracking (SCC) of the zirconium alloy cladding material, which is called iodine-induced stress corrosion cracking ( I-SCC), in the case of I-SCC, the zirconium alloy cladding will produce cracks to reduce its plasticity, which will cause brittle fracture of the zirconium cladding, leading to the leakage of radioactive substances, which may cause major safety hazards. [0003] The rod bundle fuel assembly has been widely used in nucl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C3/336G21C3/08
CPCG21C3/08G21C3/336Y02E30/30
Inventor 周磊夹川昝元锋闫晓黄彦平陈炳德
Owner NUCLEAR POWER INSTITUTE OF CHINA
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