Radiation performance detection tool for radioactive pipeline local shielding body component

Abstract

The utility model relates to a radiation performance detection tool for a radioactive pipeline local shield member. The radiation performance detection tool comprises a sample fixing base, a telescopic bracket and a neutron source support, the telescopic support comprises a fixed end and a telescopic end, the bottom of the telescopic end is adjustably and fixedly connected with the top of the fixed end, and the telescopic end can extend out of or retract into the fixed end; the telescopic support is arranged at the center position in the sample fixing base, a neutron source support is arranged at the top of the telescopic end of the telescopic support and used for containing and supporting a neutron source, and the telescopic support is used for adjusting the height of the neutron source so that the neutron source can be located at the center position of the cylindrical shielding body. The radiation performance detection tool has the beneficial effects that the radiation performance detection tool can be applied to a shielding performance test of a cylindrical shielding body and can be used for effectively simulating a local shielding effect of the cylindrical shielding body on a radioactive pipeline; the telescopic bracket can freely adjust the height of the test radioactive source to ensure that the neutron source is always located in the center of the cylinder structure, so that the shielding test result is more reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear-powered ships, and in particular relates to a radiation performance detection tool for a local shielding component of a radioactive pipeline. Background Art

[0002] Shielding radioactive pipelines is a critical and complex engineering problem. While traditional lead shielding is widely used, it suffers from shortcomings such as poor mechanical properties, poor corrosion resistance, and biotoxicity. These drawbacks make lead unsuitable for long-term use in harsh environments, particularly those found in high sea conditions like those encountered by nuclear-powered vessels.

[0003] The development of shielding materials has opened up a new avenue for shielding radioactive pipes, which are currently shielded by lead. Tungsten alloy, due to its high density, has become a promising shielding material, effectively blocking radiation such as gamma rays and X-rays. Furthermore, due to its excellent mechanical properties, tungsten alloy can be easily processed into cylindrical structures; these cylindrical structures are used for localized shielding of radioactive pipes.

[0004] Extensive testing of materials' radiation and shielding properties has been conducted in the prior art. Radiation shielding structures designed for these experiments typically consist of a radiation source, a lead collimator, a material test specimen, and a detector. However, testing the shielding properties of molded structures focused on practical applications is less mature and remains in the exploratory stage. Furthermore, while various radiation shielding structures have been designed for these experiments, specialized tooling for testing the shielding properties of these different structures is lacking.

[0005] In summary, it is particularly important to design special tooling for shielding performance testing that can meet the testing requirements of the shielding structure, ensure that the shielding structure can undergo rigorous performance verification before actual application, and ensure the effective operation of the shielding structure in various environments. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a radiation performance detection tool for a local shielding component of a radioactive pipeline.

[0007] This radiation performance testing tool for local shielding components of radioactive pipelines is used to place a cylindrical shielding body, including: a sample fixing base, a telescopic bracket and a neutron source support; the telescopic bracket includes a fixed end and a telescopic end, the bottom of the telescopic end is adjustably fixedly connected to the top of the fixed end, and the telescopic end can extend from the fixed end or be retracted into the fixed end; the bottom of the fixed end and the sample fixing base are fixed on the same horizontal plane; the telescopic bracket is placed in the center of the sample fixing base, and the top of the telescopic end of the telescopic bracket is provided with a neutron source support, which is used to place and support the neutron source, and the telescopic bracket is used to adjust the height of the neutron source so that the neutron source is located in the center of the cylindrical shielding body.

[0008] Preferably: the fixed end of the telescopic bracket is the outer rod, the telescopic end of the telescopic bracket is the inner rod, and a positioning screw is provided; the outer rod is a hollow tube structure with a hole in one side wall, and the inner rod is a cylindrical structure with multiple screw holes at different length positions; the outer rod and the inner rod are coaxially installed; one of the multiple screw holes opened at different length positions of the inner rod is aligned with the hole on the side wall of the outer rod, and the positioning screw is passed through the hole to fix the outer rod and the inner rod.

[0009] Preferably, the length of the telescopic bracket ranges from 60 to 100 cm.

[0010] Preferably, the cylindrical shielding body is in the shape of a ring, with an inner diameter greater than 45 cm and an outer diameter less than 55 cm.

[0011] The beneficial effects of the present invention are: (1) the radiation performance detection tooling can be applied to the shielding performance test of the cylindrical shielding body, and can be used to effectively simulate the local shielding effect of the cylindrical shielding body on the radioactive pipeline; (2) the telescopic bracket can freely adjust the height of the test radiation source to ensure that the neutron source is always located in the center of the cylindrical structure, making the shielding test results more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the radiation performance testing tool for local shielding components of radioactive pipelines;

[0013] Figure 2 Schematic diagram of a radiation shielding structure used for radiation performance testing;

[0014] Figure 3 This is a schematic diagram of the use of the radiation performance testing tool for local shielding components of radioactive pipelines.

[0015] Explanation of the reference numerals: sample fixing base 1, telescopic bracket 2, neutron source support 3, cylindrical shielding body 4, neutron source 5, detector 6, running rabbit system 7, neutron source tank 8. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the following embodiments. The following embodiments are provided solely to facilitate understanding of the present invention. It should be noted that, within the scope of the present invention, modifications may be made by a person skilled in the art without departing from the principles of the present invention. Such improvements and modifications are also within the scope of the claims of the present invention.

[0017] As an example, Figure 1As shown, a radiation performance testing tool for a local shielding member of a radioactive pipeline is used to place a cylindrical shielding body 4, comprising: a sample fixing base 1, a telescopic bracket 2 and a neutron source holder 3; the telescopic bracket 2 comprises a fixed end and a telescopic end, the fixed end of the telescopic bracket 2 is an outer rod, the telescopic end of the telescopic bracket 2 is an inner rod, and is also provided with a positioning screw; the outer rod is a hollow tube structure with a hole in one side wall, and the inner rod is a cylindrical structure with multiple screw holes at different length positions; the outer rod and the inner rod are coaxially mounted; one of the multiple screw holes opened at different length positions of the inner rod is aligned with the side of the outer rod. The openings on the wall are aligned, and the outer rod and the inner rod are fixed by positioning screws passing through the openings, so that the length range of the telescopic bracket 2 is 60-100 cm; the bottom of the fixed end is fixed together with the sample fixing base 1 on the same horizontal plane; the telescopic bracket 2 is placed in the center position inside the sample fixing base 1, and a neutron source holder 3 is provided on the top of the telescopic end of the telescopic bracket 2. The neutron source holder 3 is used to place and support the neutron source 5. The telescopic bracket 2 is used to adjust the height of the neutron source 5 so that the neutron source is located in the center position of the cylindrical shielding body 4 (the cylindrical shielding body 4 is a circular ring with an inner diameter greater than 45 cm and an outer diameter less than 55 cm).

[0018] The radiation performance testing tool for the local shielding member of a radioactive pipeline described in this embodiment is used to perform a radiation performance test on a cylindrical shielding body 4:

[0019] A section of a pipeline in the shipbuilding field is selected as the shielding object. A cylindrical shielding body 4 is designed and processed according to the size of the pipeline section. A radiation performance testing tool for local shielding components of radioactive pipelines is installed in a laboratory environment. The sample fixing base 1 and the neutron source holder 3 are aligned. The height of the telescopic bracket 2 is adjusted according to the height of the cylindrical shielding body 4. The cylindrical shielding body 4 is placed on top of the sample fixing base 1 of the tooling of this embodiment, and the cylindrical shielding body 4 and the sample fixing base 1 are aligned. The neutron source 5 is placed on the neutron source holder 3, and the height of the telescopic bracket 2 is adjusted according to the height of the cylindrical shielding body 4 to ensure that the neutron source 5 is located at the center of the cylindrical shielding body 4.

[0020] Arrange detectors 6 on the outer surface of the cylindrical shield 4, 10 cm away from the outer surface of the cylindrical shield 4, and 20 cm away from the outer surface of the cylindrical shield 4, respectively, turn on the power supply system, and record the background status of the detectors 6;

[0021] The power supply system supplies power to the rabbit running system 7, and the rabbit system 7 injects the neutron source 5 of the neutron source tank 8 into the neutron source holder 3 and counts after the displayed number stabilizes;

[0022] Take multiple measurements to get the average count value on site;

[0023] The average count value is processed to obtain the shielding performance parameters of the cylindrical shielding body test model.

Claims

1. A radiation performance testing tool for a local shielding member of a radioactive pipeline, used for placing a cylindrical shielding member (4), characterized in that: include: A sample fixing base (1), a telescopic bracket (2) and a neutron source holder (3); the telescopic bracket (2) includes a fixed end and a telescopic end, the bottom of the telescopic end is adjustably fixedly connected to the top of the fixed end, and the telescopic end can be extended from the fixed end or retracted into the fixed end; the bottom of the fixed end and the sample fixing base (1) are fixed on the same horizontal plane; the telescopic bracket (2) is placed in the middle of the sample fixing base (1), and the top of the telescopic end of the telescopic bracket (2) is provided with a neutron source holder (3), the neutron source holder (3) is used to place and support the neutron source (5), and the telescopic bracket (2) is used to adjust the height of the neutron source (5) so that the neutron source is located at the center of the cylindrical shielding body (4).

2. The radiation performance testing tool for a radioactive pipeline local shielding member according to claim 1 is characterized by: The fixed end of the telescopic bracket (2) is the outer rod, and the telescopic end of the telescopic bracket (2) is the inner rod, which is also provided with a positioning screw; the outer rod is a hollow tube structure with a hole in one side wall, and the inner rod is a cylindrical structure with a plurality of screw holes at different length positions; the outer rod and the inner rod are coaxially installed; one of the plurality of screw holes at different length positions of the inner rod is aligned with the hole on the side wall of the outer rod, and the positioning screw is passed through the hole to fix the outer rod and the inner rod.

3. The radiation performance testing tool for a radioactive pipeline local shielding member according to claim 1 or 2, characterized in that: The length of the telescopic bracket (2) ranges from 60 to 100 cm.

4. The radiation performance testing tool for a radioactive pipeline local shielding member according to claim 3 is characterized by: The cylindrical shielding body (4) is in the shape of a ring, with an inner diameter greater than 45 cm and an outer diameter less than 55 cm.

Images