Sampling tube component of boric acid concentration detection device

Abstract

The invention provides a sampling pipe component of a boric acid concentration detection device. The sampling pipe component of the boric acid concentration detection device comprises a sampling pipe component window body, an upper flange, an upper flange connecting pipe, an inner hexagonal window compression bolt, a window body flange, a Raman optical component interface component, a lower flange connecting pipe, a lower flange, a window sapphire and an O-shaped sealing ring. The O-shaped sealing ring is placed in a sealing groove machined in the outer side of the window opening, the window sapphire is pressed on the O-shaped sealing ring, the window body flange and the Raman optical component interface component are pressed on the window glass, and the window body flange and the Raman optical component interface component are fixed to the sampling tube component window body. And the Raman optical component is arranged in a groove of the window body flange and the Raman optical component interface component. By designing the sampling tube component with the optical window and designing the groove for accommodating the Raman optical component, the problems that an existing boric acid concentration measuring instrument is prone to interference, neutron source intensity decay, large measurement deviation and the like are solved.

Description

Technical Field

[0001] The present application belongs to the technical field of boric acid concentration detection in the primary circuit of a pressurized water reactor, and in particular relates to a sampling tube component of a boric acid concentration detection device. Background Art

[0002] In a pressurized water reactor nuclear power plant, in addition to using control rods to control the reactivity of the primary loop, boric acid is added to the primary cooling water to compensate for the excess reactivity of the core, flatten the core power distribution, increase the burnup depth, and improve the economy and safety of nuclear power plant operation. In order to prevent the accidental reduction of the boron concentration in the coolant of the reactor primary loop system, that is, the boric acid concentration of the reactor primary loop system coolant is accidentally diluted and causes reactor power abnormality, pressurized water reactor nuclear power plants are equipped with primary loop boric acid concentration online measurement equipment. At present, the online boron concentration measurement equipment for primary loop boron concentration generally adopts a boric acid concentration measuring instrument with a neutron source. The boric acid concentration measuring instrument with a neutron source has the disadvantages that the neutron radiation source components have a strong neutron radiation source, the instrument system is easily interfered, the neutron source intensity decays, the calibration work is cumbersome, the price is expensive, and the measurement deviation is large. Summary of the invention

[0003] In view of this, the embodiment of the present application is dedicated to providing a sampling tube component of a boric acid concentration detection device. By designing a sampling tube component with an optical window and designing a groove for accommodating a Raman optical component in the sampling tube component, the problems of existing boric acid concentration measuring instruments with neutron sources, such as susceptibility to interference, neutron source intensity decay, cumbersome calibration work, high price, and large measurement deviation, can be solved.

[0004] The present application provides a sampling tube component of a boric acid concentration detection device, which comprises a sampling tube component window body 1, an upper flange 2, an upper flange pipe 3, a hexagonal window clamping bolt 4, a window body flange and a Raman optical component interface component 5, a lower flange pipe 6, a lower flange 7, a window sapphire 8 and an O-ring 9. The sampling tube component window body 1, the upper flange 2, the upper flange pipe 3, the lower flange pipe 6 and the lower flange 7 are welded to form a combination for the circulation of a sampling liquid for detection in a reactor primary circuit. On the outside of the window channel opening of the assembly, an O-ring 9 is placed in a sealing groove processed on the outside of the window, a window sapphire 8 is pressed on the O-ring 9, a window body flange and a Raman optical component interface component 5 are pressed on the window sapphire 8, a plurality of bolt holes on the window body flange and the Raman optical component interface component 5 are aligned with a plurality of prefabricated bolt holes on the sampling tube component window body 1, and a plurality of hexagonal window clamping bolts 4 are used to fix the window body flange and the Raman optical component interface component 5 on the sampling tube component window body 1, and the connection and tightening make the O-ring 9 meet the sealing compression pre-tightening requirements specified in the standard. The Raman optical component is installed in the groove of the window body flange and the Raman optical component interface component 5. The sampling tube component of the boric acid concentration detection device is connected to the reactor primary loop detection sampling system through the upper flange 2 and the lower flange 7.

[0005] In a specific embodiment of the present application, the upper flange 2, the upper flange pipe 3, the hexagonal window clamping bolt 4, the window body flange and the Raman optical component interface component 5, the lower flange pipe 6 and the lower flange 7 are made of nuclear grade 3 stainless steel.

[0006] In a specific embodiment of the present application, the window sapphire 8 is made of a transparent material with good light transmittance and a pressure resistance of more than 10 MPa.

[0007] In a specific embodiment of the present application, the number of the multiple bolt holes on the window flange and the Raman optical component interface component 5, the multiple prefabricated bolt holes on the sampling tube component window body 1, and the multiple hexagonal window clamping bolts 4 are all four.

[0008] In a specific embodiment of the present application, the Raman optical component is fixed to the groove of the window flange and the Raman optical component interface component 5 by three evenly distributed screws.

[0009] The beneficial effect of the technical solution of the present application is that the reactor coolant test sampling fluid (such as boron-containing sample water) in the reactor primary loop detection sampling system can enter the sampling tube component of the boric acid concentration detection device from the lower flange 7, flow through the visual window from bottom to top, and then flow out of the sampling tube component of the boric acid concentration detection device from the upper flange 2 and return to the reactor primary loop detection sampling system. By setting the Raman optical component to be installed in the groove of the window body flange and the Raman optical component interface component 5, the laser beam emitted by the optical component is focused on the flowing reactor coolant test sampling fluid through the visual window of the window sapphire 8, and the laser focusing beam generates Raman scattered light wave signals in the sampling fluid. The Raman scattered light wave signals are collected by the optical component through the visual window of the window sapphire 8 and enter the optical system for subsequent optical signal processing. After data processing, the real-time boron concentration of the sampling fluid is measured, and the sampling tube component of the boric acid concentration detection device achieves the pressure sealing and optical signal collection functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Shown is a schematic diagram of the side cross-sectional structure of a sampling tube component of a boric acid concentration detection device provided in one embodiment of the present application.

[0011] Figure 2 Shown Figure 1 A schematic diagram of the front structure of a sampling tube component of a boric acid concentration detection device according to the illustrated embodiment. DETAILED DESCRIPTION

[0012] After careful study, it was found that the design and development of a boron concentration measuring instrument using the Raman spectroscopy measurement principle can solve the drawbacks of the above background technology. The measuring instrument can use optical equipment to perform Raman spectroscopy boric acid concentration measurement.

[0013] In order to construct a complete optical system of the Raman optical measuring instrument, the embodiment of the present application designs a sampling tube component with an optical window in the primary loop sampling system of the nuclear power plant. The sampling tube component is designed with an optically transparent window and can meet the pressure-bearing requirements of the primary loop system, thereby meeting both the optical path channel requirements of the optical measuring instrument and the nuclear safety technical requirements of the primary loop system of the nuclear power plant. Through the sampling tube component, the optical measuring instrument forms a complete optical measurement system, namely: incident optical system + solution system + Raman spectrum acquisition system.

[0014] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0015] At least one embodiment of the present application provides a sampling tube component of a boric acid concentration detection device, referring to Figure 1 and Figure 2 The sampling tube component of the boric acid concentration detection device includes a sampling tube component window body 1, an upper flange 2, an upper flange pipe 3, a hexagonal window clamping bolt 4, a window body flange and a Raman optical component interface component 5, a lower flange pipe 6, a lower flange 7, a window sapphire 8 and an O-ring 9. The sampling tube component window body 1, the upper flange 2, the upper flange pipe 3, the lower flange pipe 6, and the lower flange 7 are welded to form a combination for the circulation of the sampling liquid for the first circuit detection of the reactor. On the outside of the window channel opening of the assembly, an O-ring 9 is placed in a sealing groove processed on the outside of the window, a window sapphire 8 is pressed on the O-ring 9, a window body flange and a Raman optical component interface component 5 are pressed on the window sapphire 8, a plurality of bolt holes on the window body flange and the Raman optical component interface component 5 are aligned with a plurality of prefabricated bolt holes on the sampling tube component window body 1, and a plurality of hexagonal window clamping bolts 4 are used to fix the window body flange and the Raman optical component interface component 5 on the sampling tube component window body 1, and the connection and tightening make the O-ring 9 meet the sealing compression pre-tightening requirements specified in the standard. The Raman optical component is installed in the groove of the window body flange and the Raman optical component interface component 5. The sampling tube component of the boric acid concentration detection device is connected to the reactor primary loop detection sampling system through the upper flange 2 and the lower flange 7.

[0016] It should be noted that the sampling tube component of the boric acid concentration detection device is connected to the reactor primary loop detection sampling system through the upper flange 2 and the lower flange 7, and the connection seal is designed and installed according to the nuclear level 3 standard. The sampling tube component of the boric acid concentration detection device is connected to the upstream and downstream sampling pipelines using flanges, and the connection can be sealed with a graphite gasket. The sampling tube component is selected for bracket fixation according to the front and rear pipeline conditions of the sampling loop.

[0017] According to the technical solution provided in the embodiment of the present application, the reactor coolant test sampling fluid (such as boron-containing sample water) in the reactor primary loop detection sampling system can enter the sampling tube component of the boric acid concentration detection device from the lower flange 7, flow through the visual window from bottom to top, and then flow out of the sampling tube component of the boric acid concentration detection device from the upper flange 2 and return to the reactor primary loop detection sampling system. By setting the Raman optical component to be installed in the groove of the window body flange and the Raman optical component interface component 5, the laser beam emitted by the optical component is focused on the flowing reactor coolant test sampling fluid through the visual window of the window sapphire 8, and the laser focusing beam generates a Raman scattered light wave signal in the sampling fluid. The Raman scattered light wave signal is collected by the optical component through the visual window of the window sapphire 8 and enters the optical system for subsequent optical signal processing. After data processing, the real-time boron concentration of the sampling fluid is measured, and the sampling tube component of the boric acid concentration detection device achieves the pressure sealing and optical signal collection functions.

[0018] In at least one embodiment of the present application, the upper flange 2, the upper flange pipe 3, the hexagonal window clamping bolt 4, the window body flange and the Raman optical component interface component 5, the lower flange pipe 6 and the lower flange 7 are all made of nuclear grade 3 stainless steel. In this way, the sampling tube component of the boric acid concentration detection device meets the nuclear grade pipeline component standard.

[0019] In at least one embodiment of the present application, the window sapphire 8 is made of a transparent material with good light transmittance and a pressure resistance of more than 10 MPa.

[0020] In at least one embodiment of the present application, the number of the multiple bolt holes on the window body flange and the Raman optical component interface component 5, the multiple prefabricated bolt holes on the sampling tube component window body 1, and the multiple hexagonal window clamping bolts 4 are all 4. In this way, the window sapphire 8 cooperates with the O-ring 9, and the window body flange and the Raman optical component interface component 5 are tightened and compressed by the four hexagonal window clamping bolts, so that the window body flange and the Raman optical component interface component are connected and tightened by the four hexagonal window clamping bolts to achieve the sealing effect, and the pressure holding test can meet the sampling tube component to withstand an operating pressure of less than 3.5MPa, the design pressure can meet 4.65MPa, and the test pressure meets 6.98MPa.

[0021] In at least one embodiment of the present application, the Raman optical component is fastened and installed into the grooves of the window flange and the Raman optical component interface component 5 by three evenly distributed screws.

[0022] It should be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0023] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0024] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A sampling tube component of a boric acid concentration detection device, characterized in that: It includes the sampling tube component window, upper flange, upper flange pipe, hexagonal window clamping bolt, window flange and Raman optical component interface components, lower flange pipe, lower flange, window sapphire and O-ring, Among them, the sampling tube component window body, upper flange, upper flange pipe, lower flange pipe and lower flange are welded to form an assembly for the circulation of sampling liquid for reactor primary circuit detection. On the outside of the window channel opening of the assembly, an O-ring is placed in a sealing groove processed on the outside of the window, the window sapphire is pressed on the O-ring, the window body flange and the Raman optical component interface component are pressed on the window sapphire, and multiple bolt holes on the window body flange and the Raman optical component interface component are aligned with multiple prefabricated bolt holes on the sampling tube component window body. Multiple hexagonal window clamping bolts are used to fix the window body flange and the Raman optical component interface component to the sampling tube component window body. The connection and tightening make the O-ring meet the sealing compression pre-tightening requirements specified in the standard. The Raman optical component is installed in the groove of the window body flange and the Raman optical component interface component. The sampling tube component of the boric acid concentration detection device is connected to the reactor primary circuit detection sampling system through the upper flange and the lower flange.

2. The sampling tube component of the boric acid concentration detection device according to claim 1, characterized in that: The upper flange, upper flange pipe, hexagonal window clamping bolts, window body flange and Raman optical component interface components, lower flange pipe and lower flange are all made of nuclear grade 3 stainless steel.

3. The sampling tube component of the boric acid concentration detection device according to claim 1, characterized in that: The window glass is made of transparent material with good light transmittance and pressure resistance of more than 10MPa.

4. The sampling tube component of the boric acid concentration detection device according to claim 1, characterized in that: The number of the multiple bolt holes on the window body flange and the Raman optical component interface component, the multiple prefabricated bolt holes on the sampling tube component window body, and the multiple hexagonal window clamping bolts are all four.

5. The sampling tube component of the boric acid concentration detection device according to any one of claims 1 to 4, characterized in that: The Raman optical component is fixed to the groove of the window flange and the Raman optical component interface component by three evenly distributed screws.

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