A PWR Fuel Assembly Simulation Device with Low Voltage and High Power

A fuel assembly and simulation device technology, which is applied in the simulation process of specific applications, reactors, nuclear power generation, etc., can solve the problems of large energy consumption and complex structure of the device, and achieve the effect of reducing loss and cost and facilitating replacement

Active Publication Date: 2018-11-02
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the device using stainless steel tubes to simulate fuel assemblies needs to be equipped with a corresponding high-voltage and high-power power supply, resulting in large energy consumption and complicated device structure. The purpose is to provide a low-voltage and high-power pressurized water reactor Fuel assembly simulation device, which meets the requirements of high-temperature and high-pressure experiments, and maintains thermal-hydraulic characteristics similarity with reactor fuel assemblies, can realize low-voltage, high-power PWR fuel assembly simulation process, consumes less energy, and simplifies the structure. It is used in the critical heat flux density and flow instability experiments of PWR fuel assemblies to verify the thermal safety performance of the reactor

Method used

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  • A PWR Fuel Assembly Simulation Device with Low Voltage and High Power
  • A PWR Fuel Assembly Simulation Device with Low Voltage and High Power
  • A PWR Fuel Assembly Simulation Device with Low Voltage and High Power

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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a low-voltage and high-power PWR fuel assembly simulation device includes a pressure-bearing component, an electric heating component 2 and a square flow channel, where the square flow channel is arranged in the pressure-bearing component and is sealed to the pressure-bearing component, The electric heating component 2 passes through the square flow channel and the pressure-bearing component at the same time, and is sealed and fixed with the pressure-bearing component. This embodiment solves the problems of electric heating, insulation and airtightness by passing the electric heating component 2 through the square flow channel and the pressure-bearing component at the same time, and is sealed and fixed with the pressure-bearing component, and achieves similar thermal and hydraulic characteristics as the reactor fuel assembly The low-voltage, high-power fuel assembly simulation process reduces the power consumption during simulation and simplifie...

Embodiment 2

[0032] Such as figure 1 As shown, on the basis of embodiment 1, the pressure-bearing component includes an upper flange cover 4, an upper groove face flange 6, a lower groove face flange 11 and a lower flange cover 17, and the upper flange cover 4 is arranged on the upper The groove flange 6 is above and fixed to each other, the lower groove flange 11 is arranged above the lower flange cover 17 and fixed to each other, the upper groove flange 6 is arranged above the lower groove flange 11, and the upper groove flange 6 and A pressure-bearing cylinder body 8 is arranged between the lower groove surface flanges 11, and the pressure-bearing cylinder body 8 is welded and fixed with the upper groove surface flange 6 and the lower groove surface flange 11 at the same time, and the square flow channel is arranged in the pressure-bearing cylinder body 8. The middle and both ends protrude and are respectively arranged in the upper groove surface flange 6 and the lower groove surface flan...

Embodiment 3

[0034] Such as figure 1 , figure 2 As shown, on the basis of the above embodiment, the electric heating assembly 2 includes an upper conductive copper head 19, an electric heating rod bundle, and a lower conductive plate 23. The top of the electric heating rod bundle passes through the upper conductive copper head 19, and the bottom of the electric heating rod bundle passes After passing through the square runner, it is fixed with the lower conductive plate 23, and the upper conductive copper head 19 is arranged between the upper flange cover 4 and the upper groove flange 6 and fixed with the upper groove flange 6. The upper conductive copper head 19 The top end is arranged in the upper flange cover 4, the bottom end of the upper conductive copper head 19 is arranged in the upper groove surface flange 6, and the lower conductive plate 23 is arranged in the lower groove surface flange 11. The bottom end of the upper conductive copper head 19 is recessed as an arc-shaped groove, ...

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PUM

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Abstract

The invention discloses a low-voltage and high-power pressurized water reactor fuel assembly simulation device, which comprises a pressure-bearing assembly, an electric heating assembly and a square flow channel. The square flow channel is arranged in the pressure-containing assembly and is sealed with the pressure-containing assembly. The electric heating component passes through the square flow channel and the pressure-bearing component at the same time, and is sealed and fixed with the pressure-bearing component. The device meets the requirements of high-temperature and high-pressure experiments, and maintains the thermal-hydraulic characteristics similarity with the reactor fuel assembly. It can realize the simulation process of the pressurized water reactor fuel assembly with low voltage and high power. It consumes less energy and simplifies the structure. It is used in pressurized water reactors. Fuel assembly critical heat flux and flow instability experiments to verify the thermal safety performance of the reactor.

Description

Technical field [0001] The invention relates to a PWR rod bundle fuel assembly simulation device, in particular to a PWR fuel assembly simulation device with low voltage and high power. Background technique [0002] A number of steady-state thermal design criteria are specified in the reactor design, including that the outer wall of the fuel element is not allowed to have boiling criticality; in the steady-state rated operating conditions and the predicted transient operating conditions, no flow instability will occur . Therefore, in reactor design, it is necessary to carry out critical heat flux and flow instability experiments to obtain critical heat flux values ​​and stable operating boundaries under different operating conditions to verify the thermal safety performance of the reactor. [0003] The PWR fuel assembly is generally composed of fuel rods with a diameter of 10mm in a square arrangement of 15×15 or 17×17. The heat source is the energy generated by the fission of U a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/00G06G7/54
CPCG06G7/54G21C17/001Y02E30/30
Inventor 昝元锋胡钰文黄彦平宫厚军
Owner NUCLEAR POWER INSTITUTE OF CHINA
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