A sampling tube component for a boron concentration detection device

Abstract

The application provides a sampling tube component of a borate concentration detection device, which comprises a sampling tube component window body, an upper flange, an upper flange connector, an internal hexagonal window compression bolt, a window body flange and a Raman optical component interface component, a lower flange connector, a lower flange, a window sapphire and an O-shaped sealing ring. The O-shaped sealing ring is placed in a sealing groove processed outside the window, 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 on the sampling tube component window body. The Raman optical component is installed in the groove of the window body flange and the Raman optical component interface component. The application solves the problems of the existing borate concentration measuring instrument, such as being easy to be interfered, neutron source intensity decay and large measurement deviation, by designing the sampling tube component with an optical window and designing the groove for accommodating the Raman optical component.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of boron acid concentration detection of pressurized water reactor primary loop, and particularly relates to a sampling tube component of a boron acid concentration detection device. BACKGROUND

[0002] In a pressurized water reactor nuclear power plant, the reactivity of the primary loop is controlled by using control rods, and the compensation of the excess reactivity of the reactor core and the flattening of the reactor core power distribution are achieved by adding boron acid in the primary cooling water, so as to increase the fuel burnup depth and improve the economy and safety of the nuclear power plant operation. In order to prevent the boron concentration in the reactor primary loop system coolant from being accidentally reduced, that is, the boron acid concentration in the reactor primary loop system coolant is accidentally diluted to cause abnormal reactor power, the pressurized water reactor nuclear power plant is equipped with an online boron acid concentration measuring device. The current online boron acid concentration measuring device of the primary loop generally adopts a boron acid concentration measuring instrument with a neutron source. The boron acid concentration measuring instrument with a neutron source has a strong neutron radiation source in the neutron source component, the instrument system is easy to be disturbed, the neutron source intensity decays, the calibration work is tedious, the price is expensive, and the measurement deviation is large. SUMMARY

[0003] Therefore, the embodiments of the application are dedicated to providing a sampling tube component of a boron acid concentration detection device, which solves the problems of the existing boron acid concentration measuring instrument with a neutron source, such as being easy to be disturbed, neutron source intensity decay, tedious calibration work, expensive price, and large measurement deviation, by designing a sampling tube component with an optical window and a groove for accommodating a Raman optical component.

[0004] The application provides a sampling tube component of a boron acid concentration detection device, which comprises a sampling tube component window body 1, an upper flange 2, an upper flange connecting pipe 3, a hexagonal window compression bolt 4, a window body flange and Raman optical component interface component 5, a lower flange connecting pipe 6, a lower flange 7, a window sapphire 8 and an O-shaped sealing ring 9. The sampling tube component window body 1, the upper flange 2, the upper flange connecting pipe 3, the lower flange connecting pipe 6, and the lower flange 7 are combined into a combined body for detecting the flow of a reactor primary loop sampling liquid by welding. On the outside of the window channel opening of the combined body, the O-shaped sealing ring 9 is placed in the sealing groove processed on the outside of the window opening, the window sapphire 8 is pressed on the O-shaped sealing ring 9, the window body flange and Raman optical component interface component 5 are pressed on the window sapphire 8, a plurality of bolt holes on the window body flange and Raman optical component interface component 5 are aligned with a plurality of pre-bolt holes on the sampling tube component window body 1, a plurality of hexagonal window compression bolts 4 are used to fix the window body flange and Raman optical component interface component 5 on the sampling tube component window body 1, and connection fastening is performed so that the O-shaped sealing ring 9 meets the standard sealing compression pre-tightening requirements. The Raman optical component is installed in the groove of the window body flange and Raman optical component interface component 5. The sampling tube component of the boron 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 an embodiment of the application, the upper flange 2, the upper flange connecting pipe 3, the hexagonal window compression bolt 4, the window body flange and Raman optical component interface component 5, the lower flange connecting pipe 6 and the lower flange 7 are made of nuclear grade stainless steel.

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

[0007] In an embodiment of the application, the number of the plurality of bolt holes on the window body flange and Raman optical component interface component 5, the number of the plurality of pre-bolt holes on the sampling tube component window body 1, and the number of the plurality of hexagonal window compression bolts 4 are all four.

[0008] In an embodiment of the application, the Raman optical component is tightly installed in the groove of the window body flange and Raman optical component interface component 5 through three uniformly distributed screws.

[0009] The beneficial effects of the technical scheme of the present application are 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 part of the boric acid concentration detection device from the lower flange 7, flow through the visible window from bottom to top, and then flow out of the sampling tube part of the boric acid concentration detection device from the upper flange 2 and return to the reactor primary loop detection sampling system. By arranging the Raman optical component to be installed in the slot of the window body flange and the Raman optical component interface part 5, the laser beam emitted by the optical component is focused on the flowing reactor coolant test sampling fluid through the visible window of the window sapphire 8, the laser focused 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 visible window of the window sapphire 8 into the optical system and subsequent optical signal processing, and the real-time boron concentration of the sampling fluid is measured after data processing. The sampling tube part of the boric acid concentration detection device achieves the functions of pressure sealing and optical signal collection. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 Fig. 1 shows a side cross-sectional structure schematic diagram of a sampling tube part of a boric acid concentration detection device provided by an embodiment of the present application.

[0011] Figure 2 Fig. 2 shows a front structure schematic diagram of a sampling tube part of a boric acid concentration detection device of the embodiment. Figure 1 Fig. 2 shows a front structure schematic diagram of a sampling tube part of a boric acid concentration detection device of the embodiment. DETAILED DESCRIPTION

[0012] After careful research, it is found that designing and using Raman spectrum measurement principle to redevelop a boron concentration measuring instrument can solve the drawbacks in the above background technology. The measuring instrument can use optical equipment to measure the boric acid concentration by Raman spectrum.

[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 part with an optical window in the primary loop sampling system of the nuclear power plant. The sampling tube part is designed with an optically transparent window and can meet the pressure requirement of the primary loop system, and can meet both the optical measurement instrument light path channel requirement and the nuclear safety technology requirement of the primary loop system of the nuclear power plant. Through the sampling tube part, the optical measurement instrument forms a complete optical measurement system, that is: incident optical system + solution system + Raman spectrum acquisition system.

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0015] The sampling tube component of the boron acid concentration detection device provided in at least one embodiment of the present application comprises a sampling tube component window body 1, an upper flange 2, an upper flange connecting pipe 3, an internal hexagonal window compression bolt 4, a window body flange and Raman optical component interface component 5, a lower flange connecting 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 connecting pipe 3, the lower flange connecting pipe 6, and the lower flange 7 are combined into a combined body for the flow of the sampling liquid in the reactor primary loop by welding. On the outside of the window channel opening of the combined body, the O-ring 9 is placed in the sealing groove processed on the outside of the window opening, the window sapphire 8 is pressed on the O-ring 9, the window body flange and Raman optical component interface component 5 is pressed on the window sapphire 8, the multiple bolt holes on the window body flange and Raman optical component interface component 5 are aligned with the multiple pre-bolt holes on the sampling tube component window body 1, the internal hexagonal window compression bolt 4 is used to fix the window body flange and Raman optical component interface component 5 on the sampling tube component window body 1, and the connection and fastening make the O-ring 9 meet the standard sealing compression pre-tightening requirements. The Raman optical component is installed in the groove of the window body flange and Raman optical component interface component 5. The sampling tube component of the boron acid concentration detection device is connected to the reactor primary loop detection sampling system through the upper flange 2 and the lower flange 7. Figure 1 and Figure 2 The sampling tube component of the boron acid concentration detection device provided in at least one embodiment of the present application comprises a sampling tube component window body 1, an upper flange 2, an upper flange connecting pipe 3, an internal hexagonal window compression bolt 4, a window body flange and Raman optical component interface component 5, a lower flange connecting 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 connecting pipe 3, the lower flange connecting pipe 6, and the lower flange 7 are combined into a combined body for the flow of the sampling liquid in the reactor primary loop by welding. On the outside of the window channel opening of the combined body, the O-ring 9 is placed in the sealing groove processed on the outside of the window opening, the window sapphire 8 is pressed on the O-ring 9, the window body flange and Raman optical component interface component 5 is pressed on the window sapphire 8, the multiple bolt holes on the window body flange and Raman optical component interface component 5 are aligned with the multiple pre-bolt holes on the sampling tube component window body 1, the internal hexagonal window compression bolt 4 is used to fix the window body flange and Raman optical component interface component 5 on the sampling tube component window body 1, and the connection and fastening make the O-ring 9 meet the standard sealing compression pre-tightening requirements. The Raman optical component is installed in the groove of the window body flange and Raman optical component interface component 5. The sampling tube component of the boron 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 boron 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 is sealed according to the design and installation of the nuclear three-level standard. The sampling tube component of the boron acid concentration detection device is connected to the upstream and downstream sampling pipes using flanges, and the connection can be sealed using a graphite gasket. The sampling tube component is fixed by a support according to the pipeline conditions before and after the sampling loop.

[0017] According to the technical scheme provided in the embodiments 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 boron acid concentration detection device from the lower flange 7, flow through the visible window from bottom to top, and then flow out of the sampling tube component of the boron 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 installed in the groove of the window body flange and 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 visible window of the window sapphire 8, the laser focused 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 visible window of the window sapphire 8 into the optical system and subjected to subsequent optical signal processing, and the real-time boron concentration of the sampling fluid is measured after data processing. The sampling tube component of the boron acid concentration detection device achieves the functions of pressure sealing and optical signal collection.

[0018] In at least one embodiment of the present application, the upper flange 2, the upper flange adapter 3, the hexagonal window compression bolt 4, the window body flange and Raman optical component interface component 5, the lower flange adapter 6 and the lower flange 7 are all selected from nuclear grade stainless steel materials. 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 selected from a transparent material with good light transmission performance and a pressure resistance of more than 10 MPa.

[0020] In at least one embodiment of the present application, the number of bolt holes on the window body flange and Raman optical component interface component 5, the number of pre-bolt holes on the sampling tube component window body 1, and the number of hexagonal window compression bolts 4 are all 4. In this way, the window sapphire 8 cooperates with the O-ring 9, and the window body flange and Raman optical component interface component 5 is fastened and compressed by 4 hexagonal window compression bolts, realizing the connection and fastening of the window body flange and Raman optical component interface component by 4 hexagonal window compression bolts to achieve a sealing effect. The pressure test can satisfy that the sampling tube component can withstand an operating pressure of 3.5 MPa or less, the design pressure can satisfy 4.65 MPa, and the test pressure can satisfy 6.98 MPa.

[0021] In at least one embodiment of the present application, the Raman optical component is fastened and installed into the groove of the window body flange and Raman optical component interface component 5 by 3 evenly distributed screws.

[0022] It should be noted that the combination of 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. All technical features described in the present application can be freely combined or combined in any way, unless contradictory.

[0023] As shown in the present application and claims, unless the context clearly indicates otherwise, "one", "a", and / or "the" do not refer to the singular, but can also include the plural. Generally, the term "comprising" only indicates the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0024] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, 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, This includes the sampling tube component window, upper flange, upper flange connector, hexagonal socket window clamping bolts, window flange and Raman optics component interface components, lower flange connector, lower flange, sapphire crystal for the window, and O-ring seals. The sampling tube assembly, consisting of a viewing window, upper flange, upper flange connector, lower flange connector, and lower flange, is welded together to form a unit for the flow of sampling liquid in the reactor primary loop. An O-ring is placed in a sealing groove machined on the outside of the viewing window, with a sapphire crystal pressing against it. The viewing window flange and Raman optics interface are also pressed against the sapphire crystal. Multiple bolt holes on the viewing window flange and Raman optics interface are aligned with multiple pre-drilled bolt holes on the sampling tube assembly viewing window. Multiple hexagonal socket head cap screws are used to secure the viewing window flange and Raman optics interface to the sampling tube assembly viewing window. This tight connection ensures the O-ring meets the standard sealing compression pre-tightening requirements. The Raman optics are installed in the groove of the viewing window flange and Raman optics interface. The boric acid concentration detection device's sampling tube assembly is connected to the reactor primary loop detection and sampling system via the upper and lower flanges.

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

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

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

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 optics component is fastened to the slot of the window flange and the Raman optics component interface component by three evenly distributed screws.

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