A boron injection system

Abstract

The present invention provides a boron injection system for injecting a boric acid solution into a reactor coolant system, wherein the reactor coolant system includes a cold pipe section for transmitting coolant, and the boron injection system includes: a boric acid storage tank, wherein the boric acid storage tank is provided with a first interface and a second interface, wherein the position of the first interface is higher than the second interface; a pressure balance pipeline, wherein the pressure balance pipeline is respectively connected to the cold pipe section and the first interface of the boric acid storage tank, and a pressure balance isolation valve is provided on the pressure balance pipeline; and a boric acid injection pipeline, wherein the boric acid injection pipeline is connected to the second interface of the boric acid storage tank, and the second end of the boric acid injection pipeline is used to be connected to the inlet of the reactor coolant system; wherein the second end of the pressure balance pipeline is higher than the first end of the pressure balance pipeline, and the second interface of the boric acid storage tank is higher than the inlet of the reactor coolant system, and the density of the coolant is less than the density of the boric acid solution. In this way, the probability of failure of the boron injection system is effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of nuclear power plant safety system design, and in particular to a boron injection system. Background Art

[0002] With the continuous development of science and technology and the increasing importance of environmental protection issues, nuclear power technology is an important clean energy technology that is increasingly widely used; and the safety of nuclear power plants has long been an important research topic. For example, under the conditions of the Design Basis Accident (DBA) of a nuclear power plant, the reactor coolant system (RCS) needs to be continuously cooled and depressurized. During the cooling and depressurization process, due to the reduction of primary cooling and xenon toxicity, the reactor will introduce positive reactivity, which has the risk of returning to a critical state, thus posing a major threat to the safety of the nuclear power plant. To solve the above problems, it is necessary to inject a high-concentration boron solution into the RCS through a boron injection system to compensate for the positive reactivity, ensure that the core is in a subcritical state, and thus ensure the safety of the reactor. However, the existing boron injection system usually uses a pump to drive boric acid injection, and the operation of the pump requires AC power support. In the event of failure of the AC power supply outside the plant, it is necessary to switch to an emergency diesel generator for power supply. In this way, the boron injection system drives the power supply switching and its support system is complex, and the probability of system failure is high. Therefore, the existing boron implantation system requires the support of an alternating current power supply. When the alternating current power supply fails, the boron implantation system will fail, making the boron implantation system prone to failure. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a boron implantation system, which solves the problem that the existing boron implantation system is prone to failure.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides a boron injection system for injecting a boric acid solution into a reactor coolant system, wherein the reactor coolant system includes a cold pipe section for transmitting coolant, and the boron injection system includes:

[0005] A boric acid storage box storing the boric acid solution, wherein the boric acid storage box is provided with a first interface and a second interface, and the first interface is located higher than the second interface;

[0006] a pressure balancing pipeline, wherein a first end of the pressure balancing pipeline is connected to the cold pipe section, a second end of the pressure balancing pipeline is connected to a first interface of the boric acid storage tank, and a pressure balancing isolation valve is provided on the pressure balancing pipeline; and

[0007] a boric acid injection pipeline, wherein a first end of the boric acid injection pipeline is connected to a second interface of the boric acid storage tank, and a second end of the boric acid injection pipeline is used to be connected to an inlet of a reactor coolant system;

[0008] Wherein, the second end of the pressure balance pipeline is higher than the first end of the pressure balance pipeline, and the second interface of the boric acid storage tank is higher than the inlet of the reactor coolant system, and the density of the coolant is less than the density of the boric acid solution;

[0009] When the pressure-balancing isolation valve is opened, the pressure at the first interface of the boric acid storage tank is balanced with the pressure of the reactor coolant system, and the boric acid solution is injected into the reactor coolant system under the action of density difference and potential difference.

[0010] Optionally, the boron injection system further comprises:

[0011] A boric acid injection isolation valve is arranged on the boric acid injection pipeline.

[0012] Optionally, the boric acid injection isolation valve comprises:

[0013] an upstream isolation valve that is kept normally open, wherein the upstream isolation valve is disposed on the boric acid injection pipeline; and

[0014] A downstream isolation valve is maintained normally closed and is disposed between the upstream isolation valve and the reactor coolant system on the boric acid injection line.

[0015] Optionally, the boric acid storage tank comprises:

[0016] a first boric acid storage tank, wherein a first interface of the first boric acid storage tank is connected to a second end of the pressure balance pipeline, and a second interface of the first boric acid storage tank is connected to a first end of the boric acid injection pipeline;

[0017] a second boric acid storage tank, wherein the first interface of the second boric acid storage tank is connected to the second interface of the first boric acid storage tank, the second interface of the second boric acid storage tank is connected to the first end of the boric acid injection pipeline, the second interface of the first boric acid storage tank is higher than the first interface of the second boric acid storage tank, and the solubility of the boric acid solution in the second boric acid storage tank is greater than the concentration of the boric acid solution in the first boric acid storage tank;

[0018] a first boric acid source switching valve, the first boric acid source switching valve being disposed on a pipeline connecting the first boric acid storage tank to the boric acid injection pipeline; and

[0019] A second boric acid source switching valve is provided on a pipeline connecting the second boric acid storage tank to the boric acid injection pipeline.

[0020] Optionally, the concentration of the boric acid solution in the first boric acid storage tank is greater than or equal to 6000 ppm, and the concentration of the boric acid solution in the second boric acid storage tank is greater than or equal to 10000 ppm.

[0021] Optionally, the boron injection system further comprises:

[0022] a first temperature measuring instrument, the first temperature measuring instrument being arranged at a position between the pressure balancing isolation valve and the cold pipe section on the pressure balancing pipeline; and

[0023] A first pressure measuring instrument is provided on the pressure balancing pipeline between the pressure balancing isolation valve and the cold pipe section.

[0024] Optionally, the boron injection system further comprises:

[0025] a second temperature measuring instrument, the second temperature measuring instrument being disposed between the boric acid storage tank and the boric acid injection isolation valve on the boric acid injection pipeline; and

[0026] A second pressure measuring instrument is provided at a position between the boric acid storage tank and the boric acid injection isolation valve on the boric acid injection pipeline.

[0027] Optionally, the boron injection system further comprises:

[0028] A flow meter is provided at a position between the boric acid injection isolation valve and the reactor coolant system on the boric acid injection pipeline.

[0029] Optionally, the boron injection system further comprises:

[0030] A supply pipeline is connected to a supply interface of the boric acid storage tank, and the supply pipeline is used to replenish boron and / or water to the boric acid storage tank.

[0031] Optionally, the pressure balance isolation valve and the boric acid injection isolation valve are both driven by batteries.

[0032] In an embodiment of the present invention, when the pressure-balanced isolation valve is opened, the boric acid solution in the boric acid storage tank can be injected into the reactor coolant system through the boric acid injection pipeline under the action of the pressure difference caused by the fluid density difference and the potential difference; in this way, the boron injection system can be operated in a passive manner, thereby effectively reducing the probability of failure of the boron injection system and having higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of a boron implantation system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 As shown, an embodiment of the present invention provides a boron injection system 1 for injecting a boric acid solution into a reactor coolant system 2, wherein the reactor coolant system 2 includes a cold pipe section 21 for transmitting a coolant, and the boron injection system 1 includes:

[0036] A boric acid storage box 11 storing the boric acid solution, wherein the boric acid storage box is provided with a first interface and a second interface, wherein the first interface is located higher than the second interface;

[0037] a pressure balancing pipeline 12, wherein a first end of the pressure balancing pipeline is connected to the cold pipe section 21, a second end of the pressure balancing pipeline 12 is connected to a first interface of the boric acid storage tank 11, and a pressure balancing isolation valve 121 is provided on the pressure balancing pipeline 12; and

[0038] A boric acid injection pipeline 13, wherein a first end of the boric acid injection pipeline 13 is connected to a second interface of the boric acid storage tank 11, and a second end of the boric acid injection pipeline 13 is used to be connected to an inlet 22 of a reactor coolant system 2;

[0039] The second end of the pressure balance pipeline 12 is higher than the first end of the pressure balance pipeline 12, and the second interface of the boric acid storage tank 11 is higher than the inlet 22 of the reactor coolant system, and the density of the coolant is less than the density of the boric acid solution;

[0040] When the pressure balancing isolation valve 121 is opened, the pressure at the first interface of the boric acid storage tank 11 is balanced with the pressure of the reactor coolant system 2, and the density of the fluid in the boric acid storage tank 11 and the boric acid injection pipeline 13 is greater than the density of the fluid in the pressure balancing pipeline 12 and the reactor coolant system 2. Since the arrangement position of the boric acid storage tank 11 is higher than the second end of the boric acid injection pipeline 13, the boric acid solution in the boric acid storage tank 11 is injected into the reactor coolant system 2 under the action of the pressure difference caused by the density difference and the potential difference.

[0041] In an embodiment of the present invention, the pressure of the cold pipe section is the pipe section with the highest pressure in the RCS. If other pipe sections are selected as the connecting pipe sections with the pressure balance pipeline, it may result in failure to balance the pressure in the inlet 22. Even if there is a pressure difference between the reactor coolant and the boric acid solution due to the density difference and potential difference, it is difficult to generate a driving force for the boric acid solution to be injected into the reactor coolant system 2. The above-mentioned boric acid storage tank 11 can be a vertical cylindrical stainless steel container with an ellipsoidal upper head and an ellipsoidal lower head; then the first interface can refer to the upper head, and the second interface can refer to the lower head. Of course, the above-mentioned boric acid storage tank 11 can also be a storage container of other structures, and there is no limitation on this. In addition, the above-mentioned boric acid storage tank 11 should include a plurality of boric acid storage tanks for storing boric acid solutions of different concentrations, so that boric acid solutions of different concentrations can be selected according to the accident response requirements, thereby reducing the overall insulation requirements for the system and saving boric acid solutes. The pressure balance pipeline 12 is mainly used to maintain pressure balance with the inlet 22 of the reactor coolant system, thereby ensuring that the boric acid solution can enter the reactor coolant system 2. It should be understood that when the boron injection system 1 is in a standby state, the pressure balance isolation valve 121 is in a closed state. This is because the coolant in the cold pipe section 21 is a high-temperature fluid that can reach more than 300 degrees Celsius. If the pressure balance isolation valve 121 is not closed in the standby state, or the boron injection system 1 is not provided with the pressure balance isolation valve, the coolant will transfer heat to the boric acid solution. Long-term standby makes the temperatures of the two tend to be the same, resulting in the disappearance of the temperature difference and density difference between the two. When the boric acid solution needs to be injected into the reactor coolant system, the driving force will not be generated, resulting in the failure of the boron injection system 1. The inlet of the reactor coolant system 2 can be an interface arranged on the direct injection pipeline or the injection pipeline of the reactor coolant system 2. Of course, it can also be an interface on other pipelines connected to the reactor coolant system 2, and there is no limitation on this.

[0042] In addition, the working principle of the boron injection system 1 is: when the nuclear power plant is operating normally, the pressure balance isolation valve 12 is in a closed state, and the boric acid solution will not be injected into the RCS, so that the boron injection system 1 is in a standby state. In the event of an accident condition requiring injection of boric acid solution into the RCS, such as during the cooling and depressurization of the reactor coolant system 2 under the design basis accident condition, and in the expected transient state where the emergency shutdown fails, the pressure balance isolation valve 121 can be opened to connect the cold pipe section 21 with the boric acid storage tank 11. At this time, the pressure at the first end of the pressure balance pipeline 12 is balanced with the pressure at the injection port 22. Since the fluid in the cold pipe section 21 is a coolant with a high temperature and a low density, and the fluid in the boric acid storage tank 11 is a boric acid solution with a low temperature and a high density, a pressure difference can be generated by the density difference and potential difference between the coolant and the boric acid solution, so that the boric acid solution is injected into the reactor coolant system 2 through the boric acid injection pipeline 13 under the action of the pressure difference. This achieves the purpose of compensating for positive reactivity, ensuring that the core is in a subcritical state, and ensuring the safety of the reactor.

[0043] In the embodiment of the present invention, when the pressure-balanced isolation valve 121 is opened, the boric acid solution in the boric acid storage tank 11 can be injected into the reactor coolant system 2 in a passive manner through the boric acid injection pipeline 13 under the action of the pressure difference caused by the density difference and the potential difference; in this way, the boron injection system 1 can be operated in a passive manner without the need for supporting systems such as an AC power supply, thereby effectively reducing the probability of failure of the boron injection system 1 and having higher reliability.

[0044] In addition, the structure of the boron injection system 1 is relatively simple, with fewer valves and pipelines used, and the pressure-bearing boundary is only the boric acid storage tank and pipeline, and no driving pump is required, so it also has the advantages of low cost and low operation requirements. At the same time, all components of the boron injection system 1 are located in the reactor building, and there is no containment penetration, so when the system pipeline is broken, reflective materials will not leak to the external environment.

[0045] Optionally, the boron implantation system 1 further comprises:

[0046] A boric acid injection isolation valve 131 is provided on the boric acid injection pipeline 13 .

[0047] In this embodiment, the boric acid injection isolation valve 131 can be used to cooperate with the pressure balance isolation valve 121 to determine whether the boron injection system 1 injects boric acid solution into the RCS, that is, boric acid solution will be injected into the reactor coolant system 2 only when the pressure balance isolation valve 121 and the boric acid injection isolation valve 131 are opened together; in this way, the boron injection system 1 can be effectively prevented from being started up accidentally, thereby avoiding affecting the normal operation of the nuclear power plant.

[0048] Optionally, the boric acid injection isolation valve 131 includes:

[0049] Maintaining a normally open upstream isolation valve 1311, the upstream isolation valve 1311 is disposed on the boric acid injection pipeline 13; and

[0050] A normally closed downstream isolation valve 1312 is maintained, wherein the downstream isolation valve 1312 is disposed between the upstream isolation valve 1311 and the reactor coolant system 2 on the boric acid injection pipeline.

[0051] In this embodiment, through the cooperation of the pressure-balanced isolation valve 121, the upstream isolation valve 311 that is kept normally open, and the downstream isolation valve 1312 that is kept normally closed, it can be determined whether the boron injection system 1 injects boric acid solution into the RCS; that is, only when the pressure-balanced isolation valve 121, the upstream isolation valve 1311 that is kept normally open, and the downstream isolation valve 1312 that is kept normally closed are all opened, the boron injection system 1 will inject boric acid solution into the reactor coolant system 2. The downstream isolation valve 1312 is designed to remain open in case of failure. In this way, in the event of failure of the downstream isolation valve 1312, the upstream isolation valve 1311 can also be controlled to ensure that the boron injection system 1 can operate normally and prevent the system from starting up by mistake; thereby further improving the stability and reliability of the operation of the boron injection system.

[0052] Optionally, the boric acid storage tank 11 comprises:

[0053] A first boric acid storage tank 111, wherein a first interface of the first boric acid storage tank 111 is connected to a second end of the pressure balance pipeline 12, and a second interface of the first boric acid storage tank 111 is connected to a first end of the boric acid injection pipeline 13;

[0054] A second boric acid storage tank 112, wherein a first interface of the second boric acid storage tank 112 is connected to a second interface of the first boric acid storage tank 111, and the second interface of the second boric acid storage tank 112 is connected to a first end of the boric acid injection pipeline 13, the second interface of the first boric acid storage tank 11 is higher than the first interface of the second boric acid storage tank 112, and the solubility of the boric acid solution in the second boric acid storage tank 112 is greater than the concentration of the boric acid solution in the first boric acid storage tank 11;

[0055] A first boric acid source switching valve 113, which is disposed on a pipeline connecting the first boric acid storage tank 111 to the boric acid injection pipeline 13; and

[0056] The second boric acid source switching valve 114 is disposed on a pipeline connecting the second boric acid storage tank 112 to the boric acid injection pipeline 13 .

[0057] The following is the principle of this embodiment: when it is necessary to inject a boric acid solution with a lower concentration, the first boric acid source switching valve 113 can be opened and the second boric acid source switching valve 114 can be closed; at this time, if the boron injection system 1 is in operation, the boron injection system 1 will inject the lower concentration solution in the first boric acid storage tank 111 into the reactor coolant system 2; and when it is necessary to inject a boric acid solution with a higher concentration, the first boric acid source switching valve 113 can be closed and the second boric acid source switching valve 114 can be opened. At this time, if the boron injection system 1 is in operation, the boron injection system 1 will inject the higher concentration solution in the second boric acid storage tank 114 into the reactor coolant system 1; or the first boric acid source switching valve 113 and the second boric acid source switching valve 114 can be opened at the same time to inject the solutions in the first boric acid storage tank 111 and the second boric acid storage tank 112 into the reactor coolant system 1 more quickly.

[0058] In this way, the concentration of the boric acid solution injected into the reactor coolant system 1 can be flexibly adjusted, the boric acid source can be flexibly switched, a large amount of enriched boron can be saved, and the overall insulation requirements of the system can be reduced, thereby improving the economy of the boron injection system.

[0059] Optionally, the concentration of the boric acid solution in the first boric acid storage tank 111 is greater than or equal to 6000 ppm, and the concentration of the boric acid solution in the second boric acid storage tank 112 is greater than or equal to 10000 ppm.

[0060] In this embodiment, by making the concentration of the boric acid solution in the first boric acid storage tank 111 greater than or equal to 6000ppm, and the concentration of the boric acid solution in the second boric acid storage tank 112 greater than or equal to 10000ppm, it can have high applicability and meet the operation requirements of most nuclear power plants. At the same time, the concentrations of both are kept in a suitable range, which will not cause waste and is economical. Of course, the concentration of the boric acid solution in the first boric acid storage tank 111 and the concentration of the boric acid solution in the second boric acid storage tank 112 can also be other concentrations, which are not limited to this.

[0061] Optionally, the boron implantation system 1 further comprises:

[0062] A first temperature measuring instrument 31, which is disposed between the pressure balancing isolation valve 121 and the cold pipe section 21 on the pressure balancing pipeline 12; and

[0063] A first pressure measuring instrument 32 is provided on the pressure balancing pipeline 12 between the pressure balancing isolation valve 121 and the cold pipe section 21 .

[0064] In this embodiment, the temperature of the fluid between the pressure balance isolation valve 121 and the cold pipe section 21 on the pressure balance pipeline can be observed by the first temperature measuring instrument 31 to determine whether the temperature of the fluid is abnormal; and the pressure of the fluid between the pressure balance isolation valve 121 and the cold pipe section 21 on the pressure balance pipeline 12 can be observed by the first pressure measuring instrument to determine whether the pressure is still at the pressure required by the system, so as to avoid abnormal pressure and cause failure of the boron injection system 1. In this way, the operation stability and safety of the boron injection system 1 can be further improved.

[0065] Optionally, the boron implantation system 1 further comprises:

[0066] A second temperature measuring instrument 41, which is disposed between the boric acid storage tank 11 and the boric acid injection isolation valve 131 on the boric acid injection pipeline 13; and

[0067] A second pressure measuring instrument 42 is provided on the boric acid injection pipeline 13 between the boric acid storage tank 11 and the boric acid injection isolation valve 131 .

[0068] In this embodiment, the second temperature measuring instrument 41 can be used to observe the temperature of the boric acid solution flowing out of the boric acid storage tank 11, that is, the boric acid solution injected into the reactor coolant system 2, to ensure that the temperature of the boric acid solution is not too low, to prevent the boric acid solute from crystallizing in the storage tank and the pipeline, thereby avoiding pipeline blockage and ensuring that the concentration of the boric acid solution injected into the reactor coolant system meets the requirements; and the second pressure measuring instrument 42 can be used to observe the pressure of the boric acid solution injected into the reactor coolant system to determine whether the pressure is the pressure required for the operation of the boron injection system. In this way, the operation stability and reliability of the boron injection system 1 can be further improved.

[0069] Optionally, the boron implantation system 1 further comprises:

[0070] A flow meter 5, the flow meter 5 is arranged between the boric acid injection isolation valve 131 on the boric acid injection pipeline 13 and the reactor coolant system 2. The flow meter 5 can detect the flow of the boric acid solution transmitted by the boric acid injection pipeline 13 to determine whether the flow meets the requirements, thereby guiding the operation and maintenance personnel to perform correct intervention.

[0071] Optionally, the boron implantation system 1 further comprises:

[0072] A supply line 6, the supply line 6 is connected to the supply interface 110 of the boric acid storage tank 11, and the supply line 6 is used to replenish boron and / or water to the boric acid storage tank 11. In this embodiment, through the supply line 6, when the boron and / or water in the boric acid storage tank 11 are insufficient, the boron and / or water in the boric acid storage tank 11 can be replenished to ensure that the boron injection system 1 can still operate normally, or the concentration of the boric acid solution can be adjusted by injecting boron and / or water into the boric acid storage tank 11.

[0073] Optionally, the pressure balancing isolation valve 121 and the boric acid injection isolation valve 131 are both driven by batteries.

[0074] In this embodiment, when the pressure-balanced isolation valve 121 and the boric acid injection isolation valve 131 are both driven by batteries, the isolation valve switch can be driven by the driving force provided by the batteries without the need for manpower and AC power supply, thereby improving system reliability. Optionally, the pressure-balanced isolation valve 121 and the boric acid injection isolation valve 131 can be connected to a control system, so that it can be determined whether to open the isolation valve according to the instructions of the control system, that is, whether the boron injection system 1 is running. For example, when the control system receives a signal that a boric acid solution should be injected into the reactor coolant system 2, an instruction can be sent to the pressure-balanced isolation valve 121 and the boric acid injection isolation valve 131 to open the two isolation valves, thereby injecting a boric acid solution into the reactor coolant system 1. In this way, the operation of the boron injection system 1 can be made more reliable and stable by driving with batteries, effectively reducing the system failure efficiency.

[0075] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A boron injection system for injecting a boric acid solution into a reactor coolant system, wherein the reactor coolant system comprises a cold pipe section for transmitting coolant, characterized in that: The boron implantation system comprises: A boric acid storage tank storing the boric acid solution, wherein the boric acid storage tank is provided with a first interface and a second interface, wherein the first interface is located higher than the second interface; wherein the boric acid storage tank is a vertical cylindrical stainless steel container with an ellipsoidal upper head and an ellipsoidal lower head, wherein the first interface is the upper head, and the second interface is the lower head; a pressure balancing pipeline, wherein a first end of the pressure balancing pipeline is connected to the cold pipe section, a second end of the pressure balancing pipeline is connected to a first interface of the boric acid storage tank, and a pressure balancing isolation valve is provided on the pressure balancing pipeline; and a boric acid injection pipeline, wherein a first end of the boric acid injection pipeline is connected to a second interface of the boric acid storage tank, and a second end of the boric acid injection pipeline is used to be connected to an inlet of a reactor coolant system; Wherein, the second end of the pressure balance pipeline is higher than the first end of the pressure balance pipeline, and the second interface of the boric acid storage tank is higher than the inlet of the reactor coolant system, and the density of the coolant is less than the density of the boric acid solution; When the pressure-balanced isolation valve is opened, the pressure at the first interface of the boric acid storage tank is balanced with the pressure of the reactor coolant system, and the boric acid solution is injected into the reactor coolant system under the action of density difference and potential difference; The boric acid storage tank comprises: a first boric acid storage tank, wherein a first interface of the first boric acid storage tank is connected to a second end of the pressure balance pipeline, and a second interface of the first boric acid storage tank is connected to a first end of the boric acid injection pipeline; a second boric acid storage tank, wherein the first interface of the second boric acid storage tank is connected to the second interface of the first boric acid storage tank, the second interface of the second boric acid storage tank is connected to the first end of the boric acid injection pipeline, the second interface of the first boric acid storage tank is higher than the first interface of the second boric acid storage tank, and the concentration of the boric acid solution in the second boric acid storage tank is greater than the concentration of the boric acid solution in the first boric acid storage tank; a first boric acid source switching valve, the first boric acid source switching valve being disposed on a pipeline connecting the first boric acid storage tank to the boric acid injection pipeline; and A second boric acid source switching valve is provided on a pipeline connecting the second boric acid storage tank to the boric acid injection pipeline.

2. The boron implantation system according to claim 1, characterized in that: The boron implantation system further comprises: A boric acid injection isolation valve is arranged on the boric acid injection pipeline.

3. The boron implantation system according to claim 2, characterized in that: The boric acid injection isolation valve comprises: an upstream isolation valve that is kept normally open, wherein the upstream isolation valve is disposed on the boric acid injection pipeline; and A downstream isolation valve is maintained normally closed and is disposed between the upstream isolation valve and the reactor coolant system on the boric acid injection line.

4. The boron implantation system according to claim 1, characterized in that: The concentration of the boric acid solution in the first boric acid storage tank is greater than or equal to 6000 ppm, and the concentration of the boric acid solution in the second boric acid storage tank is greater than or equal to 10000 ppm.

5. The boron implantation system according to claim 1, characterized in that: The boron implantation system further comprises: a first temperature measuring instrument, the first temperature measuring instrument being disposed between the pressure balancing isolation valve and the cold pipe section on the pressure balancing pipeline; and A first pressure measuring instrument is provided on the pressure balancing pipeline between the pressure balancing isolation valve and the cold pipe section.

6. The boron implantation system according to claim 2, characterized in that: The boron implantation system further comprises: a second temperature measuring instrument, the second temperature measuring instrument being disposed between the boric acid storage tank and the boric acid injection isolation valve on the boric acid injection pipeline; and A second pressure measuring instrument is provided at a position between the boric acid storage tank and the boric acid injection isolation valve on the boric acid injection pipeline.

7. The boron implantation system according to claim 2, characterized in that: The boron implantation system further comprises: A flow meter is provided at a position between the boric acid injection isolation valve and the reactor coolant system on the boric acid injection pipeline.

8. The boron implantation system according to claim 1, characterized in that: The boron implantation system further comprises: A supply pipeline is connected to a supply interface of the boric acid storage tank, and the supply pipeline is used to replenish boron and / or water to the boric acid storage tank.

9. The boron implantation system according to claim 2, characterized in that: The pressure balance isolation valve and the boric acid injection isolation valve are both driven by batteries.

Images