A High Temperature Resistance Test System and Method for a Radiation Shielding Module

Abstract

The present invention discloses a high-temperature test system and method for a radiation shielding module, comprising: a lattice-shaped space chamber steel structure provided with side wall observation holes; a shielding module disposed on the inner wall of the lattice of the chamber steel structure, including a protective layer for shielding radiation; a thermocouple laid in the protective layer and performing data interaction with a data acquisition device; a heating device installed outside the lattice of the chamber steel structure and conducting heat through contact with the chamber steel structure; a fire simulation device disposed inside the lattice of the chamber steel structure and simulating different levels of fire environments by adjusting the distance from and the combustion degree of the inner wall of the chamber steel structure; and a control system for controlling the data acquisition device and the heating device. Adjust the power and temperature of the heating device to simulate different break accident conditions, start the fire simulation device, and control the flame size to simulate different chamber fire environments. It can be used to simulate high-temperature environments under different break accidents and analyze and evaluate the heat resistance safety of the shielding module.

Description

Technical Field

[0001] The invention belongs to the field of high-temperature tests for radiation shielding of nuclear power plants (including nuclear-powered icebreakers, floating power stations, etc.), and particularly relates to a high-temperature test system and method for a radiation shielding module. Background Art

[0002] After a high-energy pipeline break occurs in a compartment (such as a loss-of-coolant accident or a steam pipeline rupture accident), high-temperature and high-pressure fluid jets into the compartment, causing the temperature of the inner environment of the compartment to rise rapidly. In addition, when a fire breaks out in a compartment such as an electrical and mechanical compartment, the temperature of the outer environment of the compartment rises, and heat transfer causes the temperature of the shielding module in the steel structure of the compartment to rise. To enhance the heat resistance safety of the shielding module, a heat insulation layer is provided between the lead plate and the lead borated polyethylene plate of the module; a thermal insulation layer is laid on the outer side of the lead borated polyethylene layer.

[0003] To ensure that the shielding module of the compartment maintains structural integrity and functional integrity in a high-temperature environment, a test system needs to be designed to evaluate the heat resistance safety of the shielding module. Currently, there is little research on high-temperature tests of compartment shielding modules. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-temperature test system and method for a radiation shielding module according to the above-mentioned technical problems, which are used to simulate high-temperature environments under different break accidents and analyze and evaluate the heat resistance safety of the shielding module.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A high-temperature test system for a radiation shielding module, characterized by comprising:

[0007] A lattice-shaped space compartment steel structure provided with side wall observation holes;

[0008] A shielding module arranged on the inner wall of the lattice of the compartment steel structure, including a protective layer for shielding radiation arranged from the inside to the outside;

[0009] Thermocouples laid in the protective layer and interacting with a data acquisition device;

[0010] A heating device installed outside the lattice of the compartment steel structure and conducting heat through contact with the compartment steel structure;

[0011] A fire simulation device arranged inside the lattice of the compartment steel structure and simulating different levels of fire environments by adjusting the distance from the inner wall of the compartment steel structure and the combustion degree;

[0012] A control system for controlling the data acquisition device and the heating device.

[0013] Furthermore, an electric control cabinet is provided to control the heating device.

[0014] Furthermore, the cabin steel structure includes a side wall steel structure, a corner steel structure and a bottom steel structure that are interconnected.

[0015] Furthermore, the protective layer includes a lead plate, a heat insulation layer, and a lead-boron polyethylene plate from the outside to the inside.

[0016] Furthermore, thermocouples are laid in each layer of the protective layer.

[0017] Furthermore, the fire simulation device includes a nozzle, a gas supply device and a movable adjustment device; the adjustment device is provided with a distance adjustment mechanism between the nozzle and the inner wall of the cabin steel structure, and a gas flow adjustment mechanism.

[0018] A method for testing the high temperature resistance of a radiation shielding module, characterized by the above-mentioned high temperature resistance testing system for the radiation shielding module, comprising the following steps:

[0019] First, the shielding modules were installed within the grid of the cabin steel structure, and thermocouples were laid in slots within each protective layer.

[0020] Start the heating device for preheating, and at the same time adjust the data acquisition device to check whether the thermocouple measurement is normal;

[0021] Adjust the power and temperature of the heating device to simulate different breach accident conditions, use a data acquisition device to monitor the temperature in real time, and check the softening degree of the material through the observation hole on the side wall of the cabin steel structure.

[0022] In the above method, the fire simulation device is started with the heating device turned off, the flame size is controlled to simulate different cabin fire environments, the temperature is monitored in real time using a data acquisition device, and the softening degree of the material is checked through the observation hole on the side wall of the cabin steel structure.

[0023] In the above method, the collection temperature fluctuation of the data collection device is adjusted to not exceed 3°C.

[0024] The present invention combines the characteristics of the shielding module to simulate the cabin structure. The typical cabin side wall steel structure, corner steel structure, and bottom steel structure are consistent with the cabin prototype grid structure. It can simulate the installation process of the cabin shielding module, and can carry out heat resistance safety tests of shielding modules with different thickness combinations. It can study the influence of material thickness on the heat resistance safety of the shielding module, and provide support for the optimal design of the shielding module.

[0025] The electric heating device of the present invention is installed on the inner side of the steel structures of the side walls, corners, and bottoms of typical cabins, conducts heat transfer in contact with the steel structures, adjusts the temperature and heat power of the electric heating device, and can simulate high-temperature environments under different break accidents to study the heat resistance safety of the shielding module under different accident conditions.

[0026] The present invention further provides a fire simulation environment device composed of a nozzle and a gas supply device, which is a movable device. By adjusting the distance between the device and the steel structure of the cabin and the gas flow rate, different fire environments of cabin fires can be simulated to study the heat resistance safety of the shielding module under different fire environments.

[0027] The temperature measurement device of the present invention can measure the material temperatures at different positions, monitor the test environment temperature, and study the heat transfer characteristics of materials under different working conditions.

[0028] Observation holes are opened on the side walls of the steel structures of the side walls, corners, and bottoms of the cabins of the present invention, which can detect the softening degree of the materials inside the grid and check the structural integrity of the materials.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. Provide a high-temperature resistance test system for radiation shielding modules, which can simulate different break accident conditions in the cabin and different fire environments of cabin fires; 2. Can carry out high-temperature environment test research on the cabin shielding module to evaluate the heat resistance safety of the shielding module; 3. The system can realize the combination form of shielding modules with different material thicknesses, can adjust different working conditions, and study the influence of different working conditions and different material thickness combination forms on the heat resistance safety of the shielding module. Description of the Drawings

[0031] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0032] Figure 1 is a schematic structural diagram of the high-temperature resistance test system for the radiation shielding module of the present invention. Detailed Embodiments

[0033] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0034] As Figure 1As shown in the figure, the present invention provides a high-temperature resistance test system for a radiation shielding module. It is arranged on the shielding module, and is characterized in that the system includes an electric control cabinet 1, a typical cabin steel structure 2 (including side wall steel structure, corner steel structure and bottom steel structure), a data acquisition device 3, a control system 4, an electric heating device 5, a thermocouple 6, a fire environment simulation device 7, a temperature measurement device, a control system, and a heat preservation material 11

[0035] In the grid of the cabin steel structure 2, the installation of the shielding module is completed. The shielding module includes a lead plate 8, a heat insulation layer 9, and a lead borated polyethylene plate 10.

[0036] The side wall steel structure, corner steel structure, and bottom steel structure in the cabin steel structure 2 are consistent with the cabin prototype structure. It can simulate the installation process of the cabin shielding module, carry out heat-resistant safety tests on shielding modules with different thickness combinations, study the influence of material thickness on the heat-resistant safety of the shielding module, and provide support for the optimized design of the shielding module.

[0037] The electric heating device 5 is installed inside the cabin steel structure 2 and conducts heat through contact with the steel structure. By adjusting the temperature and heat power of the electric heating device 5, it can simulate the high-temperature environment under different break accidents and study the heat-resistant safety of the shielding module under different accident conditions.

[0038] The fire simulation environment device 7 consists of a nozzle and a gas supply device. It is a movable device. By adjusting the device to adjust the distance from the cabin steel structure and the gas flow rate, it can simulate the fire environment of different cabin fires and study the heat-resistant safety of the shielding module under different fire environments.

[0039] A thermocouple 6 is laid in a groove between the lead plate 8, the heat insulation layer 9, and the lead borated polyethylene plate 10 as a temperature measurement device. The temperature measurement device (thermocouple 6) is arranged in the shielding module, can measure the material temperature at different positions, monitor the test environment temperature, and study the heat transfer characteristics of the material under different working conditions.

[0040] In the cabin steel structure 2, observation holes are opened on the side walls of the cabin side wall steel structure, corner steel structure, and bottom steel structure, which can detect the softening degree of the materials inside the grid and check the structural integrity of the materials.

[0041] A high-temperature resistance test method for a radiation shielding module implemented according to the present invention is as follows:

[0042] During the test, first, in the grid of the cabin steel structure 2, the installation of the shielding module is completed, including the lead plate 8, the heat insulation layer 9, and the lead borated polyethylene plate 10. A thermocouple 6 is laid in a groove between the lead plate 8, the heat insulation layer 9, and the lead borated polyethylene plate 10.

[0043] Start the electric heating device 5 using the electric control cabinet 1 for preheating, and at the same time calibrate the data acquisition device 3 so that its temperature fluctuation does not exceed 3°C; adjust the acquisition device 3 of the control system 4 and check whether the thermocouple 6 measures normally.

[0044] Adjust the power and temperature of the electric heating device 5, simulate different break accident conditions, use the data acquisition device 3 for real-time temperature monitoring, and check the softening degree of the material at the observation hole on the side wall of the cabin steel structure 2.

[0045] Turn off the electric heating device 5, start the fire simulation device 7, adjust the flow rate of the gas supply device, control the flame size, simulate different cabin fire environments, use the data acquisition device 3 for real-time temperature monitoring, and check the softening degree of the material at the observation hole on the side wall of the cabin steel structure 2.

[0046] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A high-temperature resistance test system for a radiation shielding module, characterized in that Comprising: A lattice-shaped space cabin steel structure with side wall observation holes provided; A shielding module, arranged on the inner wall of the lattice of the cabin steel structure, including a protective layer for shielding radiation arranged from the inside to the outside; the protective layer includes a lead plate, a heat insulation layer, and a lead borated polyethylene plate from the outer layer to the inner layer; Thermocouples, laid in each layer of the protective layer, for data interaction with a data acquisition device; A heating device, installed on the outer side of the lattice of the cabin steel structure, for conducting heat in contact with the cabin steel structure; Set to simulate high-temperature environments under different break accidents by adjusting the temperature and heat power of the heating device; A fire simulation device, arranged on the inner side of the lattice of the cabin steel structure, for simulating fire environments of different levels by adjusting the distance from the inner wall of the cabin steel structure and the combustion degree; A control system, for controlling the data acquisition device and the heating device.

2. The high-temperature resistance test system for the radiation shielding module according to claim 1, characterized in that An electric control cabinet is provided for controlling the heating device.

3. The high-temperature resistance test system for the radiation shielding module according to claim 1, characterized in that The cabin steel structure includes side wall steel structures, corner steel structures, and bottom steel structures that are connected to each other.

4. The high-temperature resistance test system for the radiation shielding module according to claim 1, characterized in that The fire simulation device is a movable device, composed of a nozzle and a gas supply device, for simulating fire environments of different cabin fires by adjusting the distance from the cabin steel structure and the gas flow rate of the device.

5. The high-temperature resistance test system for the radiation shielding module according to claim 1, characterized in that A data acquisition device is used for real-time temperature monitoring.

6. The high-temperature resistance test system for the radiation shielding module according to claim 1, characterized in that Check the softening degree of the material at the side wall observation hole of the cabin steel structure.

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