Static test device for high-temperature lead-bismuth environment

Abstract

The invention discloses a static test device for a high-temperature lead-bismuth environment. The static test device comprises a simulation lower locking structure, an experimental kettle, a mechanical loading mechanism, a load displacement monitoring mechanism, a lead-bismuth melting and transferring mechanism, a temperature control mechanism and a dissolved oxygen control mechanism. According to the static test device for the high-temperature lead-bismuth environment, a reactor core lower plate simulation piece and a tail connection simulation piece are accommodated in an experiment kettle, a high-temperature lead-bismuth test environment is created through a lead-bismuth melting transfer mechanism, a temperature control mechanism and a dissolved oxygen control mechanism, and a load is applied to the tail connection simulation piece through a mechanical loading mechanism; therefore, the assembled tail connection simulation piece and the reactor core lower plate simulation piece can do static insertion and pull-out motion, and insertion / pull-out / periodic static load / temperature cycle / other mechanical property test research about a lower locking structure can be carried out in an oxygen-controlled high-temperature lead-bismuth metal environment. Therefore, whether the mechanical property of the whole lower locking structure meets the mechanical design requirements of the lead-bismuth fast reactor assembly or not can be verified and simulated.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power engineering tests, and in particular to a high-temperature lead-bismuth environmental static test device. Background Art

[0002] In the primary circuit of the lead-bismuth fast reactor, the density of the lead-bismuth coolant is larger than that of the fuel assembly, resulting in the coolant buoyancy of the assembly being greater than the assembly gravity. The combined hydraulic load generated by the coolant flow causes the fuel assembly to be subjected to an upward force in the reactor. In order to fix the fuel assembly, a lower tail connector is designed at the bottom of the assembly, which cooperates with the lower core plate to form a lower locking structure. The design of the lower locking structure of the fuel assembly is a key content of the fuel assembly structural design, and the mechanical properties of the lower locking structure are an important content for evaluating the mechanical design verification of the assembly. Therefore, it is necessary to study the insertion and extraction tests and temperature cycle loading tests of the lower locking structure of the fuel assembly to obtain the mechanical properties of the lower locking structure of the fuel assembly and provide a basis for structural optimization. However, there is a lack of research on the mechanical properties of the above-mentioned lower locking friction pair structure at home and abroad, and no research on the insertion / extraction / periodic static load / temperature cycle / other mechanical properties testing of the lower locking structure has been carried out in an oxygen-controlled high-temperature lead-bismuth metal environment. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a high-temperature lead-bismuth environmental static test device.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a high-temperature lead-bismuth environmental static test device, which includes a simulated lower locking structure, an experimental kettle, a mechanical loading mechanism, a load displacement monitoring mechanism, a lead-bismuth melting transfer mechanism, a temperature control mechanism and a dissolved oxygen control mechanism;

[0005] The simulated lower locking structure includes a core lower plate simulation component and a tail connection simulation component, and the core lower plate simulation component and the tail connection simulation component are both accommodated in the experimental kettle;

[0006] The mechanical loading mechanism is connected to the experimental kettle and is used to apply a load to the tail connection simulation member;

[0007] The load displacement monitoring mechanism is used to monitor the applied load value and the loading displacement value of the mechanical loading mechanism during the test;

[0008] The lead-bismuth melting and transfer mechanism is used to melt and transfer lead-bismuth;

[0009] The temperature control mechanism is used to control the test temperature in the test kettle;

[0010] The dissolved oxygen control mechanism is used to control the oxygen content in the experimental kettle and the lead-bismuth melting transfer mechanism.

[0011] In some embodiments, the lead-bismuth melting transfer mechanism includes a melting kettle, which is connected to the experimental kettle via a melting connecting pipeline, and a first filtering device is provided on the melting connecting pipeline.

[0012] In some embodiments, the dissolved oxygen control mechanism includes a dissolved oxygen control processing device, which is connected to the experimental kettle via a first oxygen control connecting pipeline, and the first oxygen control connecting pipeline is connected to the melting kettle via a second oxygen control connecting pipeline.

[0013] In some embodiments, the dissolved oxygen control processing device includes an argon-hydrogen mixed gas output controller, an argon-oxygen mixed gas output controller, and an argon gas output controller.

[0014] In some embodiments, the high-temperature lead-bismuth environmental static test device also includes a cooling circulation mechanism, the cooling circulation mechanism includes a cooling device, the cooling device is connected to the experimental kettle through a first cooling connecting pipeline, and the first cooling connecting pipeline is connected to the melting kettle through a second cooling connecting pipeline.

[0015] In some embodiments, the high-temperature lead-bismuth environmental static testing device further includes a pressure monitoring mechanism, and the pressure monitoring mechanism is used to monitor the pressure value in the experimental kettle.

[0016] In some embodiments, the high-temperature lead-bismuth environmental static testing device further includes a liquid level monitoring mechanism, which is used to monitor the lead-bismuth liquid level in the experimental kettle.

[0017] In some embodiments, the high-temperature lead-bismuth environmental static test device further includes a transition piece, and the mechanical loading mechanism is connected to the tail connection simulation piece via the transition piece.

[0018] In some embodiments, the tail connection simulation piece is connected to the transition piece via threads, and the core lower plate simulation piece is connected to the experimental kettle via a flange.

[0019] In some embodiments, a second filtering device is provided in the experimental kettle, and a third filtering device is provided in the melting kettle.

[0020] The implementation of the present invention has the following beneficial effects: the high-temperature lead-bismuth environment static test device creates a high-temperature lead-bismuth test environment by placing a core lower plate simulation member and a tail connection simulation member in an experimental kettle, and by a lead-bismuth melting transfer mechanism, a temperature control mechanism, and a dissolved oxygen control mechanism, and applies a load to the tail connection simulation member through a mechanical loading mechanism, so that the assembled tail connection simulation member and the core lower plate simulation member can perform static insertion and extraction movements, and can realize multiple insertions and extractions between the tail connection simulation member and the core lower plate simulation member in a high-temperature lead-bismuth environment, and can also apply periodic static load cycles when the lower tail connection simulation member and the core lower plate simulation member are in a fully inserted state, and can also apply temperature cycle loads and corresponding linearly changing extraction force loads when the lower tail connection simulation member and the core lower plate simulation member are in a fully inserted state, and can realize insertion / extraction / periodic static load / temperature cycle / other mechanical property test research on the lower locking structure in an oxygen-controlled high-temperature lead-bismuth metal environment to verify whether the overall mechanical properties of the simulated lower locking structure meet the mechanical design requirements of the lead-bismuth fast reactor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 1 is a schematic diagram of the overall structure of a high-temperature lead-bismuth environmental static test device in some embodiments of the present invention;

[0023] Figure 2 yes Figure 1 Schematic diagram of the specific structure at A in the middle. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0025] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] See also Figure 1 and Figure 2 , is a high-temperature lead-bismuth environmental static test device in some embodiments of the present invention, which includes a simulated lower locking structure 1, an experimental kettle 2, a mechanical loading mechanism 3, a load displacement monitoring mechanism 4, a lead-bismuth melting transfer mechanism 5, a temperature control mechanism 6, and a dissolved oxygen control mechanism 7. The simulated lower locking structure 1 includes a core lower plate simulation part 11 and a tail connection simulation part 12, and the core lower plate simulation part 11 and the tail connection simulation part 12 are both accommodated in the experimental kettle 2; the mechanical loading mechanism 3 is connected to the experimental kettle 2 and is used to apply a load to the tail connection simulation part 12; the load displacement monitoring mechanism 4 is used to monitor the applied load value and the load displacement value of the mechanical loading mechanism 3 during the test; the lead-bismuth melting transfer mechanism 5 is used to melt and transfer lead-bismuth; the temperature control mechanism 6 is used to control the test temperature in the experimental kettle 2; the dissolved oxygen control mechanism 7 is used to control the oxygen content in the experimental kettle 2 and the lead-bismuth melting transfer mechanism 5.

[0027] Specifically, lead-bismuth is mainly used as a coolant in the field of nuclear power. Lead-bismuth alloy is an ideal coolant material due to its high density, high thermal conductivity and good chemical stability. In a fast neutron reactor, lead-bismuth alloy can effectively absorb and dissipate heat to ensure the safe operation of the reactor. The present invention simulates the high-temperature lead-bismuth environment of 180-320°C in the primary circuit of a lead-bismuth fast reactor, and the friction pair is formed by pairing the lower core plate simulation part 11 and the tail connection simulation part 12. It has important practical significance in the practical nuclear power development industry. The purpose of the present invention is to study the mechanical properties of the lower locking structure of the independently innovated new lead-bismuth fast reactor fuel assembly and make a quantitative analysis.

[0028] The lead-bismuth melting and transfer mechanism 5 includes a melting kettle 51, which is connected to the experimental kettle 2 via a melting connection pipeline 52. It can be understood that the melting connection pipeline 52 is a circulation pipeline. Before the test begins, the lead-bismuth is transferred by hot melting of the lead-bismuth and using the melting connection pipeline 52, and the lead-bismuth is melted and transferred by combining vacuum pumping and argon injection. Through the function of the lead-bismuth melting and transfer mechanism 5, functions such as melting lead, injecting lead and discharging lead can be realized, and at the same time, combined with the temperature control mechanism 6, a high-temperature lead-bismuth test environment that meets the conditions is created.

[0029] In addition, the high-temperature lead-bismuth environmental static test device further includes a transition piece 93, through which the mechanical loading mechanism 3 is connected to the tail connection simulation member 12. The transition piece 93 is an intermediate structure connecting the mechanical loading mechanism 3 and the tail connection simulation member 12, and the connection and fixation of different types of tail connection simulation members 12 to the mechanical loading mechanism 3 can be achieved by switching the transition piece 93.

[0030] Among them, the experimental kettle 2 is a high-temperature lead-bismuth test environment for simulating the primary circuit of the lead-bismuth fast reactor. The lower core plate simulation part 11 is a test piece, and the lower core plate simulation part 11 can be connected to the experimental kettle 2 through a flange. For this test, the bottom of the lower core plate simulation part 11 is transformed into a flange shape, and is flange-connected to the experimental kettle 2. The connection method can also be designed and changed according to actual needs to achieve the connection and fixation of different types of inserts to be inserted with the experimental kettle 2. During the test, the lower core plate simulation part 11 is the insert, and is always connected and fixed to the bottom of the experimental kettle 2. The tail connection simulation part 12 is also a test piece. The tail connection simulation part 12 is connected to the transition part 93 by threads. The tail connection simulation part 12 can be machined with a threaded hole at its upper end and is threadedly connected to the transition part 93. The connection method can also be designed and changed according to actual needs to achieve the connection and fixation of different types of inserts with the mechanical loading mechanism 3. During the test, the mechanical loading mechanism 3 can apply a load to the tail connection simulation part 12 to achieve plug-in test and periodic static loading test. During the installation of the simulated lower locking structure 1, the lower core plate simulation part 11 can be loosened first and the tail connection simulation part 12 can be locked. When the lower core plate simulation part 11 is inserted into the tail connection simulation part 12 for the first time, the lower core plate simulation part 11 can be locked to ensure the centering of the mechanical loading process. During the test, the lower core plate simulation part 11 is connected and fixed to the experimental kettle 2.

[0031] The mechanical loading mechanism 3 may include a servo drive system and a transmission structure, and the servo drive system may drive the entire transmission structure and the tail connection simulation member 12 to perform an up and down plug-in test to achieve a plug-in test. The mechanical loading mechanism 3 may also apply a periodic static load cycle to the tail connection simulation member 12 when the tail connection simulation member 12 and the lower core plate simulation member 11 are in a fully inserted state to complete the periodic static loading test.

[0032] Furthermore, the high-temperature lead-bismuth environmental static test device performs plug-in and pull-out tests by fixing the lower core plate simulation part 11 and applying a displacement load to the tail connection simulation part 12 through the mechanical loading mechanism 3. During the test, the load displacement monitoring mechanism 4 monitors the applied load value and the loading displacement value of the mechanical loading mechanism 3, that is, the load displacement monitoring mechanism 4 always monitors the pull-out force value and the loading displacement change during the test, and can synchronously output the load-displacement curve to ensure that the test process is always true and effective. The temperature control mechanism 6 can control the test temperature in the experimental kettle 2. A linear change correspondence can be set between the force value loading system of the mechanical loading mechanism 3 and the temperature control mechanism 6 to achieve temperature and load corresponding loading of 180°C→akN and 320°C→bkN.

[0033] The high-temperature lead-bismuth environmental static test device also includes a pressure monitoring mechanism 91, which is used to monitor the pressure value in the experimental kettle 2. The pressure monitoring mechanism 91 can monitor the pressure change in the experimental kettle 2 and verify the airtightness of the experimental kettle 2, thereby ensuring that the oxygen-controlled environment is always effective.

[0034] In addition, the dissolved oxygen control mechanism 7 includes a dissolved oxygen control treatment device 71, which is connected to the experimental kettle 2 through a first oxygen control connecting pipeline 72, and the first oxygen control connecting pipeline 72 is connected to the melting kettle 51 through a second oxygen control connecting pipeline 73. The dissolved oxygen control treatment device 71 includes an argon-hydrogen mixed gas output controller 711, an argon-oxygen mixed gas output controller 712, and an argon gas output controller 713. The dissolved oxygen control mechanism 7 can achieve the function of deoxygenation by injecting argon-hydrogen mixed gas into the first oxygen control connecting pipeline 72 or the second oxygen control connecting pipeline 73 through a reduction reaction, and can also achieve the function of oxygen control by injecting argon-oxygen mixed gas into the first oxygen control connecting pipeline 72 or the second oxygen control connecting pipeline 73 through an oxidation reaction. The combination of these two gases ensures that the test environment is always in an effective oxygen control environment. Argon is introduced into the experimental kettle 2 or the melting kettle 51 as a double layer of heat exchange medium to ensure the cooling rate.

[0035] The high-temperature lead-bismuth environmental static test device also includes a liquid level monitoring mechanism 92, which is used to monitor the lead-bismuth liquid level in the experimental kettle 2. Specifically, the liquid level monitoring mechanism 92 may include a plurality of liquid level gauges, and the liquid level is monitored in real time by installing liquid level gauges at three positions of high, medium and low in the experimental kettle 2, so as to ensure that the lead injection and lead discharge processes are always under quantitative and effective control.

[0036] The high-temperature lead-bismuth environmental static test device also includes a cooling circulation mechanism, which includes a cooling device 81, and the cooling device 81 is connected to the test kettle 2 through a first cooling connection pipeline 82, and the first cooling connection pipeline 82 is connected to the melting kettle 51 through a second cooling connection pipeline 83. The cooling circulation mechanism can cool down the components in the test kettle 2 or the melting kettle 51 by injecting cooling water, so as to realize the transition between the test high temperature environment and the external normal temperature environment.

[0037] A first filtering device 53 is provided on the melting connecting pipeline 52, a second filtering device is provided in the experimental kettle 2, and a third filtering device is provided in the melting kettle 51. Through multi-layer filtering guarantees, it can be ensured that the lead-bismuth environment for plug-in and pull-out tests in the experimental kettle 2 is always in an environment with few impurities and effective oxygen control.

[0038] It can be understood that the high-temperature lead-bismuth environment static test device is to place the core lower plate simulation member 11 and the tail connection simulation member 12 in the experimental kettle 2, create a high-temperature lead-bismuth test environment through the lead-bismuth melting transfer mechanism 5, the temperature control mechanism 6 and the dissolved oxygen control mechanism 7, and apply a load to the tail connection simulation member 12 through the mechanical loading mechanism 3, so that the assembled tail connection simulation member 12 and the core lower plate simulation member 11 can perform static insertion and extraction movements, and can realize multiple insertion and extraction between the tail connection simulation member 12 and the core lower plate simulation member 11 in the high-temperature lead-bismuth environment, and can also A periodic static load cycle is applied between the lower tail connection simulation part 12 and the lower core plate simulation part 11 when they are in a fully inserted state. A temperature cycle load and a corresponding linearly changing pull-out force load can also be applied between the lower tail connection simulation part 12 and the lower core plate simulation part 11 when they are in a fully inserted state. This enables insertion / pulling / periodic static load / temperature cycle / other mechanical properties test research on the lower locking structure to be carried out in an oxygen-controlled high-temperature lead-bismuth metal environment to verify whether the overall mechanical properties of the simulated lower locking structure 1 meet the mechanical design requirements of the lead-bismuth fast reactor assembly.

[0039] The beneficial effects of the high temperature lead-bismuth environmental static test device are:

[0040] 1. The high-temperature lead-bismuth environment static test device can simulate the high-temperature lead-bismuth environment of 180-320°C in the primary circuit of the lead-bismuth fast reactor. The friction pair is formed by pairing the tail connection simulation part 12 with the core lower plate simulation part 11, which has important practical significance in the practical nuclear power development industry.

[0041] 2. By providing a first filtering device 53 on the melting connection pipeline 52, a second filtering device in the experimental kettle 2, and a third filtering device in the melting kettle 51, multi-layer filtering protection is achieved, which can ensure that the lead-bismuth environment in the experimental kettle 2 for plug-in test is always in a low-impurity and effective oxygen-controlled environment;

[0042] 3. The height of the liquid level gauge of the liquid level monitoring mechanism 92 can be adjusted to quantitatively adjust the liquid level of the lead-bismuth solution in the experimental kettle 2. At the same time, the lead filling and discharge in the experimental kettle 2 can be judged according to whether the indicator lights of different liquid level gauges are displayed, so as to ensure that the lead-bismuth transfer process and the liquid level adjustment in the experimental kettle 2 are quantitatively operated, which effectively improves the accuracy of the test;

[0043] 4. A multi-level oxygen control system is realized through the dissolved oxygen control mechanism 7, so that the experimental kettle 2 and the melting kettle 51 are always in an effective oxygen control environment. Before the lead and bismuth are transferred, the experimental kettle 2 may be vacuumed for multiple times, and the temperature is raised in time to control oxygen after the lead and bismuth are transferred, and the test is carried out after the oxygen content reaches the standard;

[0044] 5. The temperature control mechanism 6 can realize multiple cycles of 180 → 320 → 180°C, which improves the stability and accuracy of the test;

[0045] 6. Through the common interface connection methods such as transition piece 93 and flange, it can be used to carry out static performance test and quantitative analysis of friction pairs formed by any structural parts in high temperature lead-bismuth environment;

[0046] 7. The high-temperature lead-bismuth environmental static test device can realize automatic switching of gas and cooling water, saving labor costs;

[0047] 8. Except for the manual operation of simulating the installation and centering of the lower locking structure 1, all other operations of the high-temperature lead-bismuth environmental static test device can be controlled by software and control cabinet system, which effectively improves the intelligence of device operation and greatly saves labor costs;

[0048] 9. The high-temperature lead-bismuth environment static test device can realize the mechanical property test of the lower locking friction pair structure of the lead-bismuth fast reactor primary circuit. It can also be used for other similar fuel assemblies to simulate the lower core plate and the lower tail connector to pair the lower locking friction pair to carry out plug-in performance testing and quantitative analysis in a high-temperature lead-bismuth environment; it can carry out mechanical property tests of other structures in other high-temperature liquid metal environments; and it can also carry out high-temperature environment verification tests of instruments for liquid metal environments.

[0049] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A high temperature lead-bismuth environmental static test device, characterized in that: It includes a simulated lower locking structure (1), an experimental kettle (2), a mechanical loading mechanism (3), a load displacement monitoring mechanism (4), a lead-bismuth melting transfer mechanism (5), a temperature control mechanism (6) and a dissolved oxygen control mechanism (7); The simulated lower locking structure (1) comprises a core lower plate simulation component (11) and a tail connection simulation component (12), and the core lower plate simulation component (11) and the tail connection simulation component (12) are both accommodated in the experimental kettle (2); The mechanical loading mechanism (3) is connected to the experimental kettle (2) and is used to apply a load to the tail connection simulation member (12); The load displacement monitoring mechanism (4) is used to monitor the applied load value and the loading displacement value of the mechanical loading mechanism (3) during the test; The lead-bismuth melting and transfer mechanism (5) is used to melt and transfer lead-bismuth; The temperature control mechanism (6) is used to control the test temperature in the test kettle (2); The dissolved oxygen control mechanism (7) is used to control the oxygen content in the experimental kettle (2) and the lead-bismuth melting transfer mechanism (5).

2. The high temperature lead-bismuth environmental static test device according to claim 1 is characterized in that: The lead-bismuth melting transfer mechanism (5) comprises a melting kettle (51), wherein the melting kettle (51) is connected to the experimental kettle (2) via a melting connection pipeline (52), and a first filtering device (53) is provided on the melting connection pipeline (52).

3. The high temperature lead-bismuth environmental static test device according to claim 1, characterized in that: The dissolved oxygen control mechanism (7) comprises a dissolved oxygen control treatment device (71), wherein the dissolved oxygen control treatment device (71) is connected to the experimental kettle (2) via a first oxygen control connecting pipeline (72), and the first oxygen control connecting pipeline (72) is connected to the melting kettle (51) via a second oxygen control connecting pipeline (73).

4. The high temperature lead-bismuth environmental static test device according to claim 3, characterized in that: The dissolved oxygen control treatment device (71) comprises an argon-hydrogen mixed gas output controller (711), an argon-oxygen mixed gas output controller (712) and an argon gas output controller (713).

5. The high temperature lead-bismuth environmental static test device according to claim 3, characterized in that: The high-temperature lead-bismuth environmental static test device also includes a cooling circulation mechanism, the cooling circulation mechanism includes a cooling device (81), the cooling device (81) is connected to the experimental kettle (2) via a first cooling connecting pipeline (82), and the first cooling connecting pipeline (82) is connected to the melting kettle (51) via a second cooling connecting pipeline (83).

6. The high temperature lead-bismuth environmental static test device according to claim 1, characterized in that: The high-temperature lead-bismuth environmental static test device further comprises a pressure monitoring mechanism (91), wherein the pressure monitoring mechanism (91) is used to monitor the pressure value in the experimental kettle (2).

7. The high temperature lead-bismuth environmental static test device according to claim 1, characterized in that: The high-temperature lead-bismuth environmental static test device further comprises a liquid level monitoring mechanism (92), wherein the liquid level monitoring mechanism (92) is used to monitor the lead-bismuth liquid level in the experimental kettle (2).

8. The high temperature lead-bismuth environmental static test device according to claim 1, characterized in that: The high-temperature lead-bismuth environmental static test device also includes a transition piece (93), and the mechanical loading mechanism (3) is connected to the tail connection simulation piece (12) via the transition piece (93).

9. The high temperature lead-bismuth environmental static test device according to claim 8, characterized in that: The tail connection simulation piece (12) and the transition piece (93) are connected via threads, and the core lower plate simulation piece (11) and the experimental kettle (2) are connected via flanges.

10. The high temperature lead-bismuth environmental static test device according to claim 2, characterized in that: The experimental kettle (2) is provided with a second filtering device, and the melting kettle (51) is provided with a third filtering device.

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