Thermal test device for nuclear reactor

Abstract

The utility model discloses a thermal test device for a nuclear reactor. The thermal test device for the nuclear reactor comprises a reactor core simulator, a plurality of heating elements, a cooling air bellow and at least one cooling fan, the cooling air box is installed on the reactor core simulation body and is provided with a plurality of second embedding holes, the plurality of heating elements are inserted into the cooling air box through the plurality of second embedding holes, and the positive and negative ends of the plurality of heating elements extend to the outer side of the cooling air box through the plurality of second embedding holes. Gaps are formed between the hole walls of the plurality of second embedding holes and the plurality of heating elements respectively; the at least one cooling fan is in air guide communication with the interior of the cooling air bellow; according to the utility model, the electrode insulating layer of the heating element can be cooled through the cooling fan and the cooling air bellow; meanwhile, the cooling gas cools the anode cable, the cooling gas is fully utilized, resources are saved, system arrangement is flexible, the space requirement is low, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power, and in particular to a nuclear reactor thermal test device. Background Technology

[0002] Nuclear heat release simulation electric heating rods are currently the core equipment used in reactor thermal-hydraulic experiments to simulate nuclear fuel rods in the reactor core. To ensure the safe and stable conduct of thermal experiments, it is particularly important to meet the insulation requirements of the electric heating rods under the high-temperature environment of the thermal experiments.

[0003] In related technologies, the internal insulation layer of the heating rod can be made of materials such as magnesium oxide or boron nitride, protected by a metal shell, and its insulation requirements can be guaranteed. However, in the high-temperature and high-pressure experimental operating environment of a reactor, the heating rod is loaded with a large power, resulting in a large amount of heat generation at the positive and negative electrodes. Under high temperatures, this may cause the external insulation layer to fail, leading to an electrical accident in the experiment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a nuclear reactor thermal test device.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A nuclear reactor thermal test apparatus, comprising:

[0007] Core simulator and multiple heating elements;

[0008] A cooling air box is installed on the reactor core simulator and has multiple second recesses. Multiple heating elements are inserted into the cooling air box through the multiple second recesses. The positive and negative ends of the multiple heating elements extend out of the cooling air box from the multiple second recesses. There are gaps between the hole walls of the multiple second recesses and the multiple heating elements.

[0009] At least one cooling fan is provided, the at least one cooling fan being in communication with the internal air duct of the cooling air box to cool the heating element and the gas in the cooling air box passing through the gap to cool the first cable electrically connected to the positive terminal of the heating element.

[0010] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, preferably, a plurality of first recessed holes are provided below the cooling box, and the plurality of first recessed holes correspond to the plurality of second recessed holes in the longitudinal direction, so that the plurality of heating elements are respectively inserted longitudinally into the plurality of first recessed holes and the plurality of second recessed holes.

[0011] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, preferably the inner diameter of the first embedded hole is equivalent to the outer diameter of the heating element, and the inner diameter of the second embedded hole is larger than the outer diameter of the heating element.

[0012] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, preferably, the nuclear reactor thermal test apparatus further includes a cooling air duct, and the cooling air box and the cooling fan are connected through the cooling air duct.

[0013] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, preferably, the two ends of the cooling duct are fixed to the cooling box and the cooling fan respectively by clamps.

[0014] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, the cooling air box preferably includes a bottom plate, a surrounding plate, and a top plate;

[0015] The enclosure is disposed on the edge of the base plate, and the top plate covers the enclosure.

[0016] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, preferably the plurality of first recesses are formed on the bottom plate, and the plurality of second recesses are formed on the top plate.

[0017] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, preferably the nuclear reactor thermal test apparatus further includes a fixing component to fix the cooling box to the reactor core simulator.

[0018] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, the fixing assembly preferably includes a support ring and multiple fixing components;

[0019] The support ring includes a circular ring and a plurality of support blocks arranged circumferentially above the circular ring; the circular ring is installed on the core simulation body by the fixing member, and the cooling air box is installed on the support block by the fixing member.

[0020] Furthermore, in the aforementioned nuclear reactor thermal test apparatus, the nuclear reactor thermal test apparatus preferably further includes an electrical connection component, which includes a power supply, a first cable, and a second cable; the power supply is electrically connected to the positive terminal of the heating element through the first cable, and the negative terminal of the heating element is fixed to the reactor core simulator and grounded through a flexible connection via the second cable.

[0021] The present invention has the following advantages: the electrode insulation layer of the heating element can be cooled by the cooling fan and cooling box; at the same time, the cooling gas also cools the positive cable, making full use of the cooling gas, saving resources, and the system layout is flexible, with low space requirements and wide applicability. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a nuclear reactor thermal test device in some embodiments of this utility model;

[0024] Figure 2 yes Figure 1 A three-dimensional structural diagram of the cooling air box and cooling air duct assembly shown;

[0025] Figure 3 yes Figure 2 Another perspective three-dimensional structural diagram of the cooling air box and cooling air duct assembly shown;

[0026] Figure 4 yes Figure 1 The diagram shows a three-dimensional structure of the support ring. Detailed Implementation

[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0028] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0030] The technical solution adopted by this utility model to solve its technical problem is:

[0031] like Figures 1 to 2 As shown, some embodiments of this utility model disclose a nuclear reactor thermal test apparatus. In some embodiments, this apparatus may include: a reactor core simulator 10, multiple heating elements 20, a cooling box 30, at least one cooling fan 40, and a cooling duct 50. The cooling box 30 is mounted on the reactor core simulator 10 and has multiple second recesses 331. Multiple heating elements 20 are vertically inserted into the cooling box 30 through the second recesses 331, with the positive and negative ends of the heating elements 20 extending from the second recesses 331 to the outside of the cooling box 30. Gaps exist between the walls of the multiple second recesses 331 and the outer walls of the multiple heating elements 20. At least one cooling fan 40 is connected to the internal airflow of the cooling box 30 through the cooling duct 50. On one hand, the cooling gas generated by the cooling fan 40 enters the cooling box 30 through the cooling duct 50 to cool the electrode insulation layer of the heating elements 20 located within the cooling box 30. On the other hand, the cooling airflow of the cooling box 30 flows out through the aforementioned gap to cool the first cable 72 electrically connected to the positive terminal of the heating element 20.

[0032] The cooling gas blown into the cooling box 30 by the cooling fan 40 then flows out through the gap between the second recess 331 and the heating element 20 to form a connected airflow path, which quickly removes the heat generated by the electrode insulation layer of the heating element 20 and the first cable 72 at the positive end, preventing heat from accumulating around the heating element 20, thereby effectively reducing the operating temperature of the heating element 20 and increasing its service life.

[0033] like Figure 2 and Figure 3 As shown, in some embodiments, the cooling air box 30 may include a base plate 31, a surrounding plate 32, and a top plate 33. The surrounding plate 32 is disposed on the edge of the base plate 31, and the top plate 33 covers the surrounding plate 32. Understandably, the cooling air box 30 is cuboid in shape. Of course, in other embodiments, the cooling air box 30 may be cylindrical, spherical, irregular in shape, etc.

[0034] In some embodiments, the bottom plate 31 of the cooling air box 30 is provided with a plurality of first recessed holes 311, and the top plate 33 of the cooling air box 30 is provided with a plurality of second recessed holes 331, the plurality of first recessed holes 311 being respectively axially corresponding to the plurality of second recessed holes 331; the plurality of heating elements 20 are respectively longitudinally inserted into the plurality of first recessed holes 311 and the plurality of second recessed holes 331, so as to facilitate the insertion of the heating elements 20 on the cooling air box 30, so that their electrode insulation layer is in contact with the cooling gas inside the cooling air box 30.

[0035] In some embodiments, the inner diameter of the first recess 311 is approximately equal to the outer diameter of the heating element 20. The first recess 311 is used to fix the heating element 20 and prevent it from shaking. Alternatively, the first recess 311 can be fixed to the heating element 20 using an interference fit or similar method. The inner diameter of the second recess 331 is larger than the outer diameter of the heating element 20. A gap is left between the wall of the second recess 331 and the outer wall of the heating element 20, allowing gas from the cooling fan box 30 to flow out through this gap to the first cable 72 (see reference) electrically connected to the positive terminal of the heating element 20. Figure 1 Cooling is achieved through the gap between the second recess 331 and the heating element 20. Specifically, the gap between the cooling air box 30 and the outside is the outlet for communication between the cooling air box 30 and the outside. Therefore, the cooling gas inside the cooling air box 30 will be blown out through the gap between the second recess 331 and the heating element 20. Understandably, the temperature of the gas flowing out of the gap from the cooling air box 30 is lower than the surface temperature of the first cable 72, thereby cooling the first cable 72, making full use of the cooling gas, and saving resources.

[0036] The two ends of the cooling duct 50 are fixed to the cooling air box 30 and the cooling fan 40 respectively by clamps. Understandably, the cooling duct 50 is a circular pipe. Of course, the cooling duct 50 can also be a square pipe, an irregularly shaped pipe, etc. The cooling duct 50 can be made of stainless steel or PVC, depending on the experimental setup. Furthermore, the specific routing of the cooling duct 50 is determined by the space available in the experimental setup.

[0037] like Figure 1 and Figure 4 As shown, in some embodiments, the nuclear reactor thermal test apparatus may also include a fixing component 60 to fix the cooling box 30 to the reactor core simulator 10.

[0038] In some embodiments, the fixing component 60 may include a support ring 61 and a plurality of fasteners 62. In some embodiments, the support ring 61 includes a circular ring 611 and a plurality of support blocks 612 circumferentially disposed above the circular ring 611. The circular ring 611 is mounted to the flange of the top cover of the core simulator 10 via the fasteners 62, and the cooling air box 30 is mounted to the support blocks 612 via the fasteners 62. Understandably, the shape of the circular ring 611 corresponds to the shape of the flange, and the fasteners 62 are bolts. The circular ring 611 is fixed to the flange by bolts, and its horizontal state can be adjusted by nuts matching the bolts. The support blocks 612 have an inverted L-shaped structure. Mounting blocks corresponding to the support blocks 612 are provided on the cooling air box 30. The mounting blocks (cooling air box 30) are connected to the support blocks 612 by bolts to fix the cooling air box 30 and prevent it from shaking.

[0039] Refer again Figure 1 In some embodiments, the nuclear reactor thermal test apparatus also includes a power supply assembly 70, which includes a power supply 71, the aforementioned first cable 72, and a second cable 73. The power supply 71 is electrically connected to the positive terminal of the heating element 20 via the first cable 72, and the negative terminal of the heating element 20 is fixed to the reactor core simulator 10 and grounded via the second cable 73. On one hand, the power supply provides power to the heating element 20 through the first cable 72, causing it to generate heat and release heat. On the other hand, grounding the negative terminal can effectively reduce the risk of electric shock to the equipment. When the equipment malfunctions, grounding can guide the fault current to the negative ground terminal of the DC power supply, preventing the equipment casing from becoming energized.

[0040] The following section will further explain the thermal test device for the nuclear reactor in conjunction with its usage.

[0041] When the nuclear reactor thermal test device is in use: the cooling air box 30 is installed on the top cover flange of the core simulator 10 through the fixing component 60, the cooling fan 40 is connected to the cooling air box 30 through the cooling air duct 50, and multiple heating elements 20 are vertically inserted into the cooling air box 30 through the second recess 331, and the positive and negative ends of the heating elements 20 extend from the second recess 331 to the outside of the cooling air box 30.

[0042] The cooling fan 40 blows cooling gas into the cooling box 30 through the cooling air duct 50. The cooling gas cools the electrode insulation layer located in the cooling box 30. The cooled gas flows out through the gap between the second recess 331 of the cooling box 30 and the heating element 20, and cools the first cable 72 electrically connected to the positive terminal of the heating element 20.

[0043] It should be noted that, for those skilled in the art, without departing from the concept of this utility model, the above-mentioned technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this utility model.

Claims

1. A nuclear reactor thermal test apparatus, characterized in that, include: The reactor core simulator (10) and multiple heating elements (20); A cooling box (30) is installed on the core simulator (10) and has multiple second insertion holes (331). Multiple heating elements (20) are inserted into the cooling box (30) through the multiple second insertion holes (331). The positive and negative ends of the multiple heating elements (20) extend from the multiple second insertion holes (331) to the outside of the cooling box (30). The hole walls of the multiple second insertion holes (331) have gaps with the multiple heating elements (20). At least one cooling fan (40) is connected to the internal air duct of the cooling box (30) to cool the heating element (20) and the gas in the cooling box (30) cools the first cable (72) electrically connected to the positive terminal of the heating element (20) through the gap.

2. The nuclear reactor thermal test apparatus according to claim 1, characterized in that, The cooling box (30) has a plurality of first recesses (311) below it. The plurality of first recesses (311) correspond to the plurality of second recesses (331) in the longitudinal direction, so that the plurality of heating elements (20) are inserted longitudinally into the plurality of first recesses (311) and the plurality of second recesses (331).

3. The nuclear reactor thermal test apparatus according to claim 2, characterized in that, The inner diameter of the first recess (311) is equivalent to the outer diameter of the heating element (20), and the inner diameter of the second recess (331) is greater than the outer diameter of the heating element (20).

4. The nuclear reactor thermal test apparatus according to claim 1, characterized in that, The nuclear reactor thermal test device also includes a cooling duct (50), and the cooling air box (30) and the cooling fan (40) are connected through the cooling duct (50).

5. The nuclear reactor thermal test apparatus according to claim 4, characterized in that, The two ends of the cooling duct (50) are fixed to the cooling box (30) and the cooling fan (40) respectively by clamps.

6. The nuclear reactor thermal test apparatus according to claim 3, characterized in that, The cooling box (30) includes a bottom plate (31), a surrounding plate (32), and a top plate (33); The enclosure (32) is disposed on the edge of the bottom plate (31), and the top plate (33) covers the enclosure (32).

7. The nuclear reactor thermal test apparatus according to claim 6, characterized in that, The plurality of first recessed holes (311) are formed on the bottom plate (31), and the plurality of second recessed holes (331) are formed on the top plate (33).

8. The nuclear reactor thermal test apparatus according to claim 1, characterized in that, The nuclear reactor thermal test apparatus also includes a fixing component (60) to fix the cooling box (30) to the core simulator (10).

9. The nuclear reactor thermal test apparatus according to claim 8, characterized in that, The fixing component (60) includes a support ring (61) and a plurality of fasteners (62); The support ring (61) includes a circular ring (611) and a plurality of support blocks (612) arranged circumferentially above the circular ring (611); the circular ring (611) is installed on the core simulation body (10) by the fastener (62), and the cooling box (30) is installed on the support block (612) by the fastener (62).

10. The nuclear reactor thermal test apparatus according to claim 3, characterized in that, The nuclear reactor thermal test device also includes a power supply component (70), which includes a power supply (71), a first cable (72), and a second cable (73). The power supply (71) is electrically connected to the positive terminal of the heating element (20) through the first cable (72), and the negative terminal of the heating element (20) is fixed to the core simulation body (10) and is grounded through the second cable (73).

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