Helium system pipe break protection device and testing method

Abstract

The application discloses a helium system pipe break protection device and a testing method, which comprises a reactor, a hot gas guide pipe, a first electromagnetic valve rear isolation valve, a high-efficiency filter, a gas-water separator, a second electromagnetic valve rear isolation valve, a second bypass regulating valve, a helium compressor, a third electromagnetic valve rear isolation valve and a third bypass regulating valve. The system and the testing method can verify the actual function of the pipe break protection device, ensure that the helium system is controllable in terms of the primary loop helium area pressure under normal operation and pipe break accident conditions, and greatly improve the reliability of safe operation of the helium system.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of nuclear power, and relates to a helium system pipe break protection device and a testing method. BACKGROUND

[0002] A high temperature gas cooled reactor adopts a ceramic coated particle fuel element, graphite as a moderator, and helium as a coolant. A high temperature gas cooled reactor primary loop helium region is composed of a reactor, a steam generator and a hot gas duct. A helium supply and purification system is connected to the primary loop helium region, supplies, stores and purifies the primary loop helium during the startup, normal operation and shutdown of the high temperature gas cooled reactor, and completes real-time control of the primary loop pressure. However, due to corrosion, stress and other factors, the pipe of the helium system may be axially cracked, and the pipe break will endanger the integrity of the primary loop system pressure boundary, and will release high radioactive gas to the external environment. At this time, the high-speed gas flow needs to be cut off, and the external atmosphere and the primary loop atmosphere need to be isolated. The existing design system judges whether the helium system is broken by the change of the primary loop pressure. At least the following disadvantages exist: due to the large volume of the high temperature gas cooled reactor primary loop region, the change of the primary loop pressure cannot quickly judge the slight leakage of the helium pipe. When the primary loop pressure changes significantly, the helium system pipe has a large area of rupture, which is easy to cause an unplanned shutdown accident. At the same time, once the original design system has a helium system leakage, the primary loop helium region needs to be isolated and treated, and the reactor needs to be shut down urgently, which is not conducive to the long-term safe and stable operation of the reactor. SUMMARY

[0003] The purpose of the present application is to overcome the above-mentioned shortcomings of the prior art, and to provide a helium system pipe break protection device and a testing method. The system and the testing method can verify the actual function of the pipe break protection device, and ensure the safe and stable operation of the high temperature gas cooled reactor after the nitrogen system leaks.

[0004] To achieve the above-mentioned purpose, the helium system pipe break protection device comprises a reactor, a hot gas duct, a first electromagnetic valve rear isolation valve, a high-efficiency filter, a gas-water separator, a second electromagnetic valve rear isolation valve, a second bypass regulating valve, a helium compressor, a third electromagnetic valve rear isolation valve and a third bypass regulating valve.

[0005] The reactor is connected with the steam generator through a hot gas conduit, the outlet of the steam generator is divided into two routes, one of which is connected with the inlet of the first bypass regulating valve through the first electromagnetic valve front isolation valve and the first electromagnetic valve in turn and the inlet of the first electromagnetic valve rear isolation valve, the other of which is connected with the inlet of the first bypass regulating valve, the outlet of the first electromagnetic valve rear isolation valve is connected with the outlet of the first bypass regulating valve through a pipeline, and then is divided into two routes, one of which is connected with the inlet of the high-efficiency filter through the helium storage tank inlet regulating valve, the helium storage tank and the helium storage tank outlet regulating valve, the other of which is connected with the inlet of the high-efficiency filter, the outlet of the high-efficiency filter is connected with the inlet of the gas-water separator, the outlet of the gas-water separator is divided into two routes, one of which is connected with the inlet of the second electromagnetic valve rear isolation valve through the second electromagnetic valve front isolation valve and the second electromagnetic valve in turn, the other of which is connected with the inlet of the second bypass regulating valve, the outlet of the second electromagnetic valve rear isolation valve is connected with the outlet of the second bypass regulating valve through a pipeline, and then is connected with the inlet of the helium compressor, the outlet of the helium compressor is divided into two routes, one of which is connected with the inlet of the third electromagnetic valve rear isolation valve through the third electromagnetic valve front isolation valve and the third electromagnetic valve in turn, the other of which is connected with the inlet of the third bypass regulating valve, the outlet of the third electromagnetic valve rear isolation valve is connected with the outlet of the third bypass regulating valve through a pipeline, and then is connected with the inlet of the steam generator.

[0006] A loop pressure monitoring device is arranged in the steam generator, first differential pressure monitoring devices are connected to the two ends of the first electromagnetic valve, second differential pressure monitoring devices are connected to the two ends of the second electromagnetic valve, and third differential pressure monitoring devices are connected to the two ends of the third electromagnetic valve.

[0007] The signal generator and a helium system control module are further included, the helium system control module includes a helium system control module body and a loop pressure measurement card, a first differential pressure measurement card, a second differential pressure measurement card and a third differential pressure measurement card arranged in the helium system control module body; the loop pressure measurement card is connected with the loop pressure monitoring device 4, the first differential pressure measurement card is connected with the first differential pressure monitoring device, the second differential pressure measurement card is connected with the second differential pressure monitoring device, and the third differential pressure measurement card is connected with the third differential pressure monitoring device.

[0008] The loop pressure measurement card, the first differential pressure measurement card, the second differential pressure measurement card and the third differential pressure measurement card are connected with the signal generator.

[0009] The loop pressure measurement card, the first differential pressure measurement card, the second differential pressure measurement card and the third differential pressure measurement card are connected with the signal generator through a bus.

[0010] The reactor, the hot gas conduit, the steam generator and the loop pressure monitoring device constitute a loop helium area.

[0011] The first electromagnetic valve, the first electromagnetic valve front isolation valve, the first bypass regulating valve, the first electromagnetic valve rear isolation valve and the first differential pressure monitoring device constitute a steam generator outlet area.

[0012] The second electromagnetic valve, the second electromagnetic valve front isolation valve, the second bypass regulating valve, the second electromagnetic valve rear isolation valve and the second differential pressure monitoring device constitute a helium compressor inlet area.

[0013] The third electromagnetic valve, the third electromagnetic valve front isolation valve, the third bypass regulating valve, the third electromagnetic valve rear isolation valve and the third differential pressure monitoring device constitute a steam generator inlet area.

[0014] The test method of the high-temperature gas cooled reactor containment negative pressure exhaust system comprises pressure charging and reducing function test, pressure regulating operation function test and pipe breakage protection function test.

[0015] The pressure charging and reducing function test comprises pressure charging function verification and pressure reducing function verification.

[0016] The present application has the following beneficial effects:

[0017] The helium system pipe breakage protection device and the test method can quickly judge and locate the leakage area through differential pressure change, quickly isolate the leakage area and switch to a bypass operation condition, so that the pressure of the primary loop helium area is controllable under normal operation and pipe breakage accident conditions, potential safety accidents caused by primary loop pressure loss are effectively avoided, the signal generator is interacted with the helium system control module, the actual function of the helium system pipe breakage protection device is semi-physical verified, and the reliability of the safe operation of the helium system is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a structural schematic diagram of the present application.

[0019] Wherein 1 is a reactor, 2 is a hot gas conduit, 3 is a steam generator, 4 is a primary loop pressure monitoring device, 5 is a first electromagnetic valve front isolation valve, 6 is a first electromagnetic valve, 7 is a first electromagnetic valve rear isolation valve, 8 is a first bypass regulating valve, 9 is a helium tank inlet regulating valve, 10 is a helium tank outlet regulating valve, 11 is a helium tank, 12 is a high efficiency filter, 13 is a gas-water separator, 14 is a second electromagnetic valve front isolation valve, 15 is a second electromagnetic valve, 16 is a second electromagnetic valve rear isolation valve, 17 is a second bypass regulating valve, 18 is a helium compressor, 19 is a third electromagnetic valve front isolation valve, 20 is a third electromagnetic valve, 21 is a third electromagnetic valve rear isolation valve, 22 is a third bypass regulating valve, 23 is a first differential pressure monitoring device, 24 is a second differential pressure monitoring device, 25 is a third differential pressure monitoring device, 26 is a helium system control module, 26-1 is a primary loop pressure measurement card, 26-2 is a first differential pressure measurement card, 26-3 is a second differential pressure measurement card, 26-4 is a third differential pressure measurement card, 27 is a signal generator, 28 is a primary loop helium area, 29 is a steam generator outlet area, 30 is a helium compressor inlet area, 31 is a steam generator inlet area. DETAILED DESCRIPTION

[0020] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments, and are not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present application. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0021] The structural schematic diagrams according to the disclosed embodiments of the present application are shown in the drawings. These drawings are not drawn to scale, in which some details are exaggerated for the purpose of clear expression, and some details can be omitted. The shapes of various regions, layers and their relative size and positional relationship shown in the drawings are only exemplary, and in actuality, there can be deviations due to manufacturing tolerances or technical limitations, and the regions / layers with different shapes, sizes and relative positions can be additionally designed by the person skilled in the art according to actual needs.

[0022] Reference Figure 1The helium system pipe break protection device comprises a reactor 1, a hot gas conduit 2, a steam generator 3, a primary loop pressure monitoring device 4, a first electromagnetic valve front isolation valve 5, a first electromagnetic valve 6, a first electromagnetic valve rear isolation valve 7, a first bypass regulating valve 8, a helium storage tank inlet regulating valve 9, a helium storage tank outlet regulating valve 10, a helium storage tank 11, a high-efficiency filter 12, a gas-water separator 13, a second electromagnetic valve front isolation valve 14, a second electromagnetic valve 15, a second electromagnetic valve rear isolation valve 16, a second bypass regulating valve 17, a helium compressor 18, a third electromagnetic valve front isolation valve 19, a third electromagnetic valve 20, a third electromagnetic valve rear isolation valve 21, a third bypass regulating valve 22, a first differential pressure monitoring device 23, a second differential pressure monitoring device 24, a third differential pressure monitoring device 25, a helium system control module 26, a primary loop pressure measurement card 26-1, a first differential pressure measurement card 26-2, a second differential pressure measurement card 26-3, a third differential pressure measurement card 26-4, a signal generator 27, a primary loop helium area 28, a steam generator outlet area 29, a helium compressor inlet area 30, and a steam generator inlet area 31.

[0023] The reactor 1 and the steam generator 3 are connected through the hot gas conduit 2 to form a primary loop helium area 28; the outlet of the steam generator 3 is divided into two routes, one of which is connected in sequence with the inlet of the first electromagnetic valve rear isolation valve 7 through the first electromagnetic valve front isolation valve 5 and the first electromagnetic valve 6, and the other of which is connected with the inlet of the first bypass regulating valve 8, the outlet of the first electromagnetic valve rear isolation valve 7 and the outlet of the first bypass regulating valve 8 are connected through a pipe and then divided into two routes, one of which is connected in sequence with the inlet of the high-efficiency filter 12 through the helium storage tank inlet regulating valve 9, the helium storage tank 11 and the helium storage tank outlet regulating valve 10, and the other of which is directly connected with the inlet of the high-efficiency filter 12, the outlet of the high-efficiency filter 12 is connected with the inlet of the gas-water separator 13, the outlet of the gas-water separator 13 is divided into two routes, one of which is connected in sequence with the inlet of the second electromagnetic valve rear isolation valve 16 through the second electromagnetic valve front isolation valve 14 and the second electromagnetic valve 15, and the other of which is connected with the inlet of the second bypass regulating valve 17, the outlet of the second electromagnetic valve rear isolation valve 16 and the outlet of the second bypass regulating valve 17 are connected through a pipe and then connected with the inlet of the helium compressor 18, the outlet of the helium compressor 18 is divided into two routes, one of which is connected in sequence with the inlet of the third electromagnetic valve rear isolation valve 21 through the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve 20, and the other of which is connected with the inlet of the third bypass regulating valve 22, the outlet of the third electromagnetic valve rear isolation valve 21 and the outlet of the third bypass regulating valve 22 are connected through a pipe and then connected with the inlet of the steam generator 3.

[0024] The steam generator 3 is internally provided with a loop pressure monitoring device 4, the first electromagnetic valve 6 is connected with a first differential pressure monitoring device 23 at both ends, the second electromagnetic valve 15 is connected with a second differential pressure monitoring device 24 at both ends, and the third electromagnetic valve 20 is connected with a third differential pressure monitoring device 25 at both ends.

[0025] The helium system control module 26 comprises a helium system control module body and a loop pressure measurement card 26-1, a first differential pressure measurement card 26-2, a second differential pressure measurement card 26-3 and a third differential pressure measurement card 26-4 arranged in the helium system control module body; the loop pressure measurement card 26-1 is connected with the loop pressure monitoring device 4, the first differential pressure measurement card 26-2 is connected with the first differential pressure monitoring device 23, the second differential pressure measurement card 26-3 is connected with the second differential pressure monitoring device 24, and the third differential pressure measurement card 26-4 is connected with the third differential pressure monitoring device 25.

[0026] The loop pressure measurement card 26-1, the first differential pressure measurement card 26-2, the second differential pressure measurement card 26-3 and the third differential pressure measurement card 26-4 are connected with a signal generator 27 through a bus.

[0027] The regions prone to leakage of the helium system are divided into three regions, including a loop helium region 28 composed of the reactor 1, the hot gas conduit 2, the steam generator 3 and the loop pressure monitoring device 4; a steam generator outlet region 29 composed of the first electromagnetic valve 6, the first electromagnetic valve front isolation valve 5, the first bypass regulating valve 8, the first electromagnetic valve rear isolation valve 7 and the first differential pressure monitoring device 23; a helium compressor inlet region 30 composed of the second electromagnetic valve 15, the second electromagnetic valve front isolation valve 14, the second bypass regulating valve 17, the second electromagnetic valve rear isolation valve 16 and the second differential pressure monitoring device 24; and a steam generator inlet region 31 composed of the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19, the third bypass regulating valve 22, the third electromagnetic valve rear isolation valve 21 and the third differential pressure monitoring device 25.

[0028] The first electromagnetic valve 6, the second electromagnetic valve 15 and the third electromagnetic valve 20 have a quick closing function, and the first bypass regulating valve 8, the helium storage tank inlet regulating valve 9, the helium storage tank outlet regulating valve 10, the second bypass regulating valve 17 and the third bypass regulating valve 22 have a quick opening and automatic regulating function.

[0029] Embodiment one

[0030] Taking a 200MW high-temperature gas cooled reactor unit as an example, the loop helium pressure is 7.0MPa during normal operation,

[0031] 1, pressure charging and reducing conditions

[0032] 1) Pressure charging function verification

[0033] Confirming that the helium region 28 of the primary loop is filled with helium, opening the helium tank outlet regulating valve 10, the second electromagnetic valve 15, the second electromagnetic valve front isolation valve 14, the second electromagnetic valve rear isolation valve 16, the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve rear isolation valve 21, starting the helium compressor 18, the helium in the helium tank 11 is purified through the high efficiency filter 12 and the gas-water separator 13, and then filled into the helium region 28 of the primary loop, adjusting the frequency of the helium compressor 18, the frequency adjustment range is 30%-100%, controlling the pressure increasing rate ≤0.01 MPa / min, until the primary loop pressure monitoring device 4 shows that the primary loop pressure reaches 7.0 MPa. During this period, the first electromagnetic valve 6, the first electromagnetic valve front isolation valve 5, the first electromagnetic valve rear isolation valve 7, the first bypass regulating valve 8, the helium tank inlet regulating valve 9, the second bypass regulating valve 17 and the third bypass regulating valve 22 are in closed state; the first differential pressure monitoring device 23, the second differential pressure monitoring device 24 and the third differential pressure monitoring device 25 are not put into operation.

[0034] After the pressure charging is completed, the helium compressor 18 is stopped, and the helium tank outlet regulating valve 10, the second electromagnetic valve 15, the second electromagnetic valve front isolation valve 14, the second electromagnetic valve rear isolation valve 16, the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve rear isolation valve 21 are closed.

[0035] 2) Pressure reduction function verification

[0036] Opening the first electromagnetic valve 6, the first electromagnetic valve front isolation valve 5, the first electromagnetic valve rear isolation valve 7 and the helium tank inlet regulating valve 9, stopping the helium compressor 18, the second electromagnetic valve 15, the second electromagnetic valve front isolation valve 14, the second electromagnetic valve rear isolation valve 16, the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve rear isolation valve 21 are interlocked closed, the helium in the primary loop is discharged to the helium tank 11, the helium tank inlet regulating valve 9 automatically adjusts and controls the pressure reduction rate ≤0.05 MPa / min, until the primary loop pressure monitoring device 4 shows that the primary loop pressure is 0.01 MPa normal pressure state, during this period, the first bypass regulating valve 8, the helium tank outlet regulating valve 10, the second bypass regulating valve 17 and the third bypass regulating valve 22 are in closed state; the first differential pressure monitoring device 23, the second differential pressure monitoring device 24 and the third differential pressure monitoring device 25 are not put into operation.

[0037] 2, pressure regulating operation condition function test

[0038] 1) Confirm the primary loop pressure monitoring device 4 shows the primary loop pressure is stable at 7.0 MPa, the first solenoid valve 6, the first solenoid valve front isolation valve 5, the first solenoid valve rear isolation valve 7, the second solenoid valve 15, the second solenoid valve front isolation valve 14, the second solenoid valve rear isolation valve 16, the third solenoid valve 20, the third solenoid valve front isolation valve 19 and the third solenoid valve rear isolation valve 21 are in the open state, the helium compressor 18 is running at variable frequency, the helium gas output by the steam generator 3 is purified by the high efficiency filter 12 and the gas-water separator 13, and then sent to the steam generator 3 by the helium compressor 18. The first bypass regulating valve 8, the helium storage tank inlet regulating valve 9, the helium storage tank outlet regulating valve 10, the second bypass regulating valve 17 and the third bypass regulating valve 22 remain closed;

[0039] 2) When the pressure of the primary loop fluctuates to ≤6.65 MPa, the helium storage tank outlet regulating valve 10 is opened and automatically adjusted, the helium gas in the helium system pipeline is supplemented to the helium gas area 28 of the primary loop through the helium compressor 18 until the pressure of the primary loop rises to 7.0 MPa again, and the helium storage tank outlet regulating valve 10 is automatically closed;

[0040] 3) When the pressure of the primary loop fluctuates to ≥7.15 MPa, the helium storage tank inlet regulating valve 9 is opened and automatically adjusted, the helium gas in the helium system pipeline is recovered to the helium storage tank 11 until the pressure of the primary loop decreases to the normal operating pressure, and the helium storage tank inlet regulating valve 9 is automatically closed.

[0041] 3, pipe breakage protection working condition function test

[0042] 1) Initial state: The primary loop pressure monitoring device 4, the first differential pressure monitoring device 23, the second differential pressure monitoring device 24 and the third differential pressure monitoring device 25 all show normal pressure, the first solenoid valve 6, the first solenoid valve front isolation valve 5, the first solenoid valve rear isolation valve 7, the second solenoid valve 15, the second solenoid valve front isolation valve 14, the second solenoid valve rear isolation valve 16, the third solenoid valve 20, the third solenoid valve front isolation valve 19 and the third solenoid valve rear isolation valve 21 are in the open state, the helium compressor 18 is running at variable frequency, the helium gas output by the steam generator 3 is purified by the high efficiency filter 12 and the gas-water separator 13, and then sent to the steam generator 3 by the helium compressor 18.

[0043] 2) Simulate primary helium region 28 leak: through the signal generator 27 set primary pressure measurement card 26-1 pressure value in 1 min from 7.0 MPa to 6.0 MPa, and thus generate the first control signal, the first control signal through the primary pressure measurement card 26-1 to the primary pressure monitoring device 4, to trigger the break pipe protection action, that is, the first electromagnetic valve 6, the first electromagnetic valve front isolation valve 5 and the first electromagnetic valve rear isolation valve 7 are quickly closed; the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve rear isolation valve 21 are quickly closed; test whether the closing time of the first electromagnetic valve 6, the first electromagnetic valve front isolation valve 5 and the first electromagnetic valve rear isolation valve 7, the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve rear isolation valve 21 is less than or equal to 5s. The helium compressor 18 is stopped, the primary helium region 28 is isolated, and the test is completed to restore to the initial state.

[0044] 3) Simulate steam generator outlet region 29 leak: keep the primary pressure monitoring device 4 display normal (about 7 MPa), the second differential pressure monitoring device 24 and the third differential pressure monitoring device 25 display differential pressure normal (≤0.05 MPa), through the signal generator 27 set the first differential pressure measurement card 26-2 differential pressure ≥0.07 MPa and thus generate the second control signal, the second control signal through the first differential pressure measurement card 26-2 to the first differential pressure monitoring device 23, to trigger the break pipe protection action, that is, the first electromagnetic valve 6, the first electromagnetic valve front isolation valve 5 and the first electromagnetic valve rear isolation valve 7 are closed, test whether the closing time of the first electromagnetic valve 6, the first electromagnetic valve front isolation valve 5 and the first electromagnetic valve rear isolation valve 7 is less than or equal to 5s. The first bypass regulating valve 8 is opened and automatically adjusted, test the fast opening time ≤10s, maintain the pressure of the primary helium region 28 stable at about 7 MPa, test the automatic adjustment function of the first bypass regulating valve 8, the test is completed to restore to the initial state.

[0045] 4) Simulate helium compressor inlet area 30 leak: Keep the primary loop pressure monitoring device 4 display normal (7 MPa or so), the first differential pressure monitoring device 23 and the third differential pressure monitoring device 25 are all normal differential pressure display (≤0.05 MPa), through the signal generator 27 set the second differential pressure measuring card 26-3 differential pressure ≥0.07 MPa, and generate a third control signal, the third control signal is transmitted to the second differential pressure monitoring device 24 through the second differential pressure measuring card 26-3, to trigger the pipe break protection action, that is, the second electromagnetic valve 15, the second electromagnetic valve front isolation valve 14 and the second electromagnetic valve rear isolation valve 16 are closed, test the closing time of the second electromagnetic valve 15, the second electromagnetic valve front isolation valve 14 and the second electromagnetic valve rear isolation valve 16 is less than or equal to 5s. The second bypass regulating valve 17 is opened and automatically adjusted, and the quick opening time of the second bypass regulating valve 17 is tested whether it is less than or equal to 10s, the pressure of the primary loop helium area 28 is maintained at about 7 MPa, and the automatic adjustment function of the second bypass regulating valve 17 is tested. After the test is completed, it is restored to the initial state.

[0046] 5) Simulate steam generator inlet area 31 leak: Keep the primary loop pressure monitoring device 4 display normal (7 MPa or so), the first differential pressure monitoring device 23 and the second differential pressure monitoring device 24 are all normal differential pressure display (≤0.05 MPa), through the signal generator 27 set the second differential pressure measuring card 26-3 differential pressure ≥0.07 MPa, and generate a fourth control signal, the fourth control signal is transmitted to the third differential pressure monitoring device 25 through the second differential pressure measuring card 26-3, to trigger the pipe break protection action, that is, the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve rear isolation valve 21 are closed, test the closing time of the third electromagnetic valve 20, the third electromagnetic valve front isolation valve 19 and the third electromagnetic valve rear isolation valve 21 is less than or equal to 5s, the third bypass regulating valve 22 is opened and automatically adjusted, and the quick opening time of the third bypass regulating valve 22 is tested whether it is less than or equal to 10s, the pressure of the primary loop helium area 28 is maintained at normal operating pressure, and the automatic adjustment function of the third bypass regulating valve 22 is tested. After the test is completed, it is restored to the initial state.

Claims

1. A helium system break protection device, comprising: The reactor (1), the hot gas conduit (2), the high-efficiency filter (12), the gas-water separator (13), the second electromagnetic valve rear isolation valve (16), the second bypass regulating valve (17), the helium compressor (18), the third electromagnetic valve rear isolation valve (21) and the third bypass regulating valve (22) are included. The reactor (1) is communicated with the steam generator (3) through the hot gas conduit (2), the outlet of the steam generator (3) is divided into two routes, one of which is communicated with the inlet of the first electromagnetic valve rear isolation valve (7) in sequence through the first electromagnetic valve front isolation valve (5) and the first electromagnetic valve (6), the other of which is communicated with the inlet of the first bypass regulating valve (8), the outlet of the first electromagnetic valve rear isolation valve (7) is communicated with the outlet of the first bypass regulating valve (8) through a pipeline, and the pipeline is divided into two routes, one of which is communicated with the inlet of the high-efficiency filter (12) through the helium storage tank inlet regulating valve (9), the helium storage tank (11) and the helium storage tank outlet regulating valve (10), the other of which is communicated with the inlet of the high-efficiency filter (12), the outlet of the high-efficiency filter (12) is communicated with the inlet of the gas-water separator (13), the outlet of the gas-water separator (13) is divided into two routes, one of which is communicated with the inlet of the second electromagnetic valve rear isolation valve (16) in sequence through the second electromagnetic valve front isolation valve (14) and the second electromagnetic valve (15), the other of which is communicated with the inlet of the second bypass regulating valve (17), the outlet of the second electromagnetic valve rear isolation valve (16) is communicated with the inlet of the helium compressor (18) through a pipeline, the outlet of the helium compressor (18) is divided into two routes, one of which is communicated with the inlet of the third electromagnetic valve rear isolation valve (21) in sequence through the third electromagnetic valve front isolation valve (19) and the third electromagnetic valve (20), the other of which is communicated with the inlet of the third bypass regulating valve (22), the outlet of the third electromagnetic valve rear isolation valve (21) is communicated with the inlet of the steam generator (3) through a pipeline; The steam generator (3) is internally provided with a loop pressure monitoring device (4), the first electromagnetic valve (6) is connected with the first differential pressure monitoring device (23) at both ends, the second electromagnetic valve (15) is connected with the second differential pressure monitoring device (24) at both ends, and the third electromagnetic valve (20) is connected with the third differential pressure monitoring device (25) at both ends. The signal generator (27) and the helium system control module (26) are further included, the helium system control module (26) includes a helium system control module body and a return circuit pressure measurement card (26-1), a first differential pressure measurement card (26-2), a second differential pressure measurement card (26-3) and a third differential pressure measurement card (26-4) arranged in the helium system control module body; the return circuit pressure measurement card (26-1) is connected with the return circuit pressure monitoring device (4), the first differential pressure measurement card (26-2) is connected with the first differential pressure monitoring device (23), the second differential pressure measurement card (26-3) is connected with the second differential pressure monitoring device (24), and the third differential pressure measurement card (26-4) is connected with the third differential pressure monitoring device (25); The return circuit pressure measurement card (26-1), the first differential pressure measurement card (26-2), the second differential pressure measurement card (26-3) and the third differential pressure measurement card (26-4) are connected with the signal generator (27); The return circuit pressure measurement card (26-1), the first differential pressure measurement card (26-2), the second differential pressure measurement card (26-3) and the third differential pressure measurement card (26-4) are connected with the signal generator (27) through a bus; The reactor (1), the hot gas conduit (2), the steam generator (3) and the return circuit pressure monitoring device (4) constitute a return circuit helium area (28); The first electromagnetic valve (6), the first electromagnetic valve front isolation valve (5), the first bypass regulating valve (8), the first electromagnetic valve rear isolation valve (7) and the first differential pressure monitoring device (23) constitute a steam generator outlet area (29); The second electromagnetic valve (15), the second electromagnetic valve front isolation valve (14), the second bypass regulating valve (17), the second electromagnetic valve rear isolation valve (16) and the second differential pressure monitoring device (24) constitute a helium compressor inlet area (30); The third electromagnetic valve (20), the third electromagnetic valve front isolation valve (19), the third bypass regulating valve (22), the third electromagnetic valve rear isolation valve (21) and the third differential pressure monitoring device (25) constitute a steam generator inlet area (31).

2. A test method for a helium system pipe breakage protection device, characterized in that, The helium system pipe break protection device based on claim 1 comprises a charging and pressure reducing condition function test, a pressure regulating operation condition function test and a pipe break protection condition function test.

3. The method of claim 2, wherein the helium system pipe break protection device is a helium system pipe break protection device according to any one of claims 1 to 2. The charging and pressure reducing condition function test comprises a charging function verification and a pressure reducing function verification.

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