Automatic control system for multi-module atmospheric relief valve of sodium-cooled fast reactor

Abstract

The invention particularly relates to a sodium-cooled fast reactor multi-module atmosphere release valve automatic control system, which comprises a switching module used for selecting a pressure setting mode of an atmosphere release valve as a single setting mode or an integral setting mode under an atmosphere release valve automatic control mode; the integral setting value station is used for integrally setting the pressure setting value of the atmospheric relief valve; the single body setting value station is used for performing single body setting on the pressure setting value of the atmospheric relief valve; the pressure setting switching module is used for setting a mode selection signal according to the pressure of the atmospheric relief valve and sending a single set value or an integral set value of the pressure of the atmospheric relief valve to the PID; and the PID is used for controlling the opening degree of the corresponding atmospheric relief valve according to the integral set value or the single set value of the pressure of the corresponding atmospheric relief valve and the difference value of the field measurement value. Quick response of the atmosphere release valve is achieved, and the overpressure protection effect of the atmosphere release valve on the steam generator is effectively achieved.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant commissioning and operation and maintenance, and in particular to an automatic control system for multi-module atmospheric release valves of a sodium-cooled fast reactor. Background Art

[0002] The main steam system of the sodium-cooled fast reactor plays the role of overpressure protection for the steam generator. When the pressure of the main steam system increases, the safety of the steam generator is ensured by opening the turbine bypass valve, the atmospheric release valve, and the safety valve in sequence. There are 16 groups of steam generators arranged in the reactor building of the sodium-cooled fast reactor, and two atmospheric release valves are arranged on the main steam pipeline of each group of steam generators. Under normal operating conditions, the atmospheric release valve is in a closed state. When the condenser vacuum is destroyed and the turbine bypass system loses control, it is necessary to immediately open the atmospheric release valve to complete the steam discharge and export the residual heat of the reactor and coolant after shutdown.

[0003] The existing sodium-cooled fast reactor atmospheric relief valve pressure setting mode is a single setting mode. When the turbine bypass exhaust system loses control, due to the large number of sodium-cooled fast reactor atmospheric relief valves, modifying the atmospheric relief valve pressure setting value one by one is inefficient and will make the atmospheric relief valve unable to respond quickly, and the atmospheric relief valve cannot effectively play its role in overpressure protection of the steam generator. Summary of the invention

[0004] Aiming at the problem that the single-unit setting mode is adopted in the pressure setting mode of the atmospheric release valve of a sodium-cooled fast reactor, when the turbine bypass system loses control, due to the large number of atmospheric release valves of the sodium-cooled fast reactor, setting the pressure value of the atmospheric release valve one by one is inefficient and makes the atmospheric release valve unable to respond quickly, and the atmospheric release valve cannot effectively play the role of overpressure protection of the steam generator. A sodium-cooled fast reactor multi-module atmospheric release valve automatic control system is provided. The atmospheric release valve pressure setting mode adds an overall setting mode while retaining the original single-unit setting mode. When the turbine bypass system loses control, the pressure is switched to the overall setting mode, and the pressures of multiple atmospheric release valves are set as a whole, thereby improving the working efficiency of the atmospheric release valve pressure setting, making the atmospheric release valve respond quickly, and effectively playing the role of overpressure protection of the atmospheric release valve on the steam generator; after the atmospheric release valve pressure is stabilized at the overall set pressure value, it is switched back to the single-unit setting mode; the single-unit setting mode and the overall setting mode are switched without disturbance.

[0005] In order to solve the above problems, the present invention provides a sodium-cooled fast reactor multi-module atmospheric release valve automatic control system, comprising a switching module, a single set value station, an overall set value station, a pressure setting switching module and a PID; the atmospheric release valves are divided into one or more groups, one group of atmospheric release valves corresponds to one switching module and one overall set value station, and one atmospheric release valve corresponds to one single set value station, one pressure setting switching module and one PID;

[0006] A switching module is provided with a switching button, which is used to generate a pressure setting mode selection signal of the corresponding group of atmospheric release valves and send it to the pressure setting switching modules of each atmospheric release valve of the corresponding group according to the pressure setting mode of the corresponding group of atmospheric release valves selected by the operator as a single setting mode or an overall setting mode when the corresponding group of atmospheric release valves is in the automatic control mode;

[0007] The overall setting value station is used for the operator to set the pressure setting value of each atmospheric relief valve of the corresponding group as a whole, obtain the overall setting value of the pressure of each atmospheric relief valve of the corresponding group and send it to the pressure setting switching module of each atmospheric relief valve of the corresponding group;

[0008] The single-unit setting value station is used for the operator to perform single-unit setting of the pressure setting value of the corresponding atmospheric relief valve, obtain the single-unit setting value of the pressure of the corresponding atmospheric relief valve and send it to the pressure setting switching module of the corresponding atmospheric relief valve;

[0009] A pressure setting switching module, for sending a single set value or an overall set value of the pressure of the corresponding atmospheric release valve to the PID of the corresponding atmospheric release valve according to a pressure setting mode selection signal of the corresponding group of atmospheric release valves;

[0010] PID is used to control the opening of the corresponding atmospheric relief valve according to the difference between the overall set value or the individual set value of the corresponding atmospheric relief valve pressure and the on-site measured value.

[0011] In the present invention, the switching module is provided with a switching button and an RS trigger connected to the output of the switching button, and the switching button is provided with a single setting mode and an overall setting mode;

[0012] When the operator clicks the overall setting mode on the switch button, the S end of the RS trigger connected to the switch button is set, and the RS trigger sends a signal that the pressure setting mode of the corresponding group of atmospheric relief valves is the overall setting mode to the pressure setting switch modules of each atmospheric relief valve in the corresponding group;

[0013] When the operator clicks the single-unit setting mode on the switch button, the R end of the RS trigger connected to the switch button is set, and the RS trigger sends a signal that the pressure setting mode of the corresponding group of atmospheric relief valves is the single-unit setting mode to the pressure setting switch modules of each atmospheric relief valve in the corresponding group.

[0014] In the present invention, the pressure setting switching module is provided with an IN1 pin, an IN2 pin, an OUT pin and a SET pin, the SET pin receives a pressure setting mode selection signal of a corresponding group of atmospheric release valves, the IN1 pin receives a single set value of the corresponding atmospheric release valve pressure, and the IN2 pin receives an overall set value of the corresponding atmospheric release valve pressure;

[0015] When the pressure setting mode of the corresponding group of atmospheric release valves is the single setting mode received by the SET pin, the pressure setting switching module sends the single setting value of the corresponding atmospheric release valve pressure received by the IN1 pin to the PID of the corresponding atmospheric release valve through the OUT pin;

[0016] When the pressure setting mode of the corresponding group of atmospheric relief valves received at the SET pin is the overall setting mode, the pressure setting switching module sends the overall setting value of the corresponding atmospheric relief valve pressure received at the IN2 pin to the PID of the corresponding atmospheric relief valve through the OUT pin.

[0017] In the present invention, the PID is provided with an SP pin; the pressure setting switching module sends the overall setting value or the single setting value of the corresponding atmospheric release valve pressure received by the IN1 pin or the IN2 pin to the SP pin of the PID corresponding to the atmospheric release valve through the OUT pin.

[0018] In the present invention, the overall setting value station is also used for the operator to modify the overall setting value of the pressure of each atmospheric relief valve of the corresponding group to the individual setting value before the pressure control mode of the atmospheric relief valve of the corresponding group is switched from the individual setting mode to the overall setting mode.

[0019] In the present invention, the single set value station is provided with an AM pin, a PV pin and an OUT pin; the sodium-cooled fast reactor multi-module atmospheric release valve automatic control system also includes a hand operator, and a group of atmospheric release valves corresponds to one hand operator;

[0020] A hand operator, used for manually selecting the single-unit setting value station of each atmospheric release valve of the corresponding group as a manual mode or an automatic mode when the pressure setting mode of the atmospheric release valve of the corresponding group is the single-unit setting mode, automatically generating a manual and automatic mode selection signal of the single-unit setting value station of each atmospheric release valve of the corresponding group and sending it to the AM pin of the single-unit setting value station of each atmospheric release valve of the corresponding group;

[0021] When the pressure setting mode of the corresponding atmospheric relief valve of the single set value station is the single set mode, its AM pin value follows the input value of the handheld operator, its PV pin value follows the on-site measured value of the corresponding atmospheric relief valve pressure, and its OUT pin value follows the PV pin value.

[0022] In the present invention, the sodium-cooled fast reactor multi-module atmospheric release valve automatic control system further includes an analog quantity switching module, and a group of atmospheric release valves corresponds to one analog quantity switching module;

[0023] The switching module is also used to send the pressure setting mode selection signal of the corresponding group of atmospheric release valves to the analog switching module of the corresponding group of atmospheric release valves;

[0024] The analog switching module is used to send the pressure setting mode selection signal of the corresponding group of atmospheric release valves to the AM pin of the single set value station of each atmospheric release valve in the corresponding group when the pressure setting mode of the corresponding group of atmospheric release valves is the overall setting mode, obtain the overall set value of the pressure of each atmospheric release valve in the corresponding group and send it to the PV pin of the single set value station of each atmospheric release valve in the corresponding group;

[0025] When the pressure setting mode of the corresponding group of atmospheric relief valves of the single set value station is the overall setting mode, its AM pin value is 0, its OUT pin value follows the PV pin value, and its PV pin value follows the overall setting value of the corresponding atmospheric relief valve pressure.

[0026] Beneficial technical effects of the present invention:

[0027] The sodium-cooled fast reactor multi-module atmospheric relief valve automatic control system of the present invention has two atmospheric relief valve pressure setting modes, namely, a single-unit setting mode and an overall setting mode. When a turbine bypass exhaust system loses control, the system switches to the overall setting mode, and the pressures of a plurality of atmospheric relief valves are set as a whole, thereby improving the working efficiency of the atmospheric relief valve pressure setting, so that the atmospheric relief valves respond quickly, thereby effectively exerting the overpressure protection function of the atmospheric relief valves on the steam generator. After the atmospheric relief valve pressure is stabilized at the overall set pressure value, the system switches back to the single-unit setting mode. The single-unit setting mode and the overall setting mode are switched without disturbance, thereby ensuring the rapid response of the atmospheric relief valve protection function in an emergency situation, and guaranteeing the automated, safe and reliable control and operation of the sodium-cooled fast reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a schematic structural diagram of an embodiment of a sodium-cooled fast reactor multi-module atmospheric release valve automatic control system. DETAILED DESCRIPTION

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0032] refer to Figure 1 , This embodiment provides a sodium-cooled fast reactor multi-module atmospheric release valve automatic control system, including a switching module, a single set value station, an overall set value station, a pressure setting switching module and a PID; the atmospheric release valves are divided into one or more groups, one group of atmospheric release valves corresponds to one switching module and one overall set value station, and one atmospheric release valve corresponds to one single set value station, one pressure setting switching module and one PID;

[0033] A switching module is provided with a switching button, which is used to generate a pressure setting mode selection signal for each atmospheric release valve in the corresponding group and send it to the pressure setting switching module for each atmospheric release valve in the corresponding group according to the pressure setting mode of each atmospheric release valve in the corresponding group selected by the operator as a single setting mode or an overall setting mode when each atmospheric release valve in the corresponding group is in the automatic control mode;

[0034] The overall setting value station is used for the operator to set the pressure setting value of each atmospheric relief valve of the corresponding group as a whole, obtain the overall setting value of the pressure of each atmospheric relief valve of the corresponding group and send it to the pressure setting switching module of each atmospheric relief valve of the corresponding group;

[0035] The single-unit setting value station is used for the operator to perform single-unit setting of the pressure setting value of the corresponding atmospheric relief valve, obtain the single-unit setting value of the pressure of the corresponding atmospheric relief valve and send it to the pressure setting switching module of the corresponding atmospheric relief valve;

[0036] A pressure setting switching module, for sending a single set value or an overall set value of the pressure of the corresponding atmospheric release valve to the PID of the corresponding atmospheric release valve according to a pressure setting mode selection signal of the corresponding group of atmospheric release valves;

[0037] PID is used to control the opening of the corresponding atmospheric relief valve according to the difference between the overall set value or the individual set value of the corresponding atmospheric relief valve pressure and the on-site measured value.

[0038] In this embodiment, the switching module is provided with a switching button and an RS trigger connected to the output of the switching button, and the switching button is provided with a single setting mode and an overall setting mode;

[0039] When the operator clicks the overall setting mode on the switch button, the S end of the RS trigger connected to the switch button is set, and the RS trigger sends a signal that the pressure setting mode of the corresponding group of atmospheric relief valves is the overall setting mode to the pressure setting switch modules of each atmospheric relief valve in the corresponding group;

[0040] When the operator clicks the single-unit setting mode on the switch button, the R end of the RS trigger connected to the switch button is set, and the RS trigger sends a signal that the pressure setting mode of the corresponding group of atmospheric relief valves is the single-unit setting mode to the pressure setting switch modules of each atmospheric relief valve in the corresponding group.

[0041] In this embodiment, the pressure setting switching module is provided with an IN1 pin, an IN2 pin, an OUT pin and a SET pin, the SET pin receives a pressure setting mode selection signal of a corresponding group of atmospheric release valves, the IN1 pin receives a single set value of the corresponding atmospheric release valve pressure, and the IN2 pin receives an overall set value of the corresponding atmospheric release valve pressure;

[0042] When the pressure setting mode of the corresponding group of atmospheric release valves is the single setting mode received by the SET pin, the pressure setting switching module sends the single setting value of the corresponding atmospheric release valve pressure received by the IN1 pin to the PID of the corresponding atmospheric release valve through the OUT pin;

[0043] When the pressure setting mode of the corresponding group of atmospheric relief valves received at the SET pin is the overall setting mode, the pressure setting switching module sends the overall setting value of the corresponding atmospheric relief valve pressure received at the IN2 pin to the PID of the corresponding atmospheric relief valve through the OUT pin.

[0044] In this embodiment, the PID is provided with an SP pin; the pressure setting switching module sends the overall setting value or the single setting value of the corresponding atmospheric relief valve pressure received by the IN1 pin or the IN2 pin to the SP pin of the PID corresponding to the atmospheric relief valve through the OUT pin.

[0045] In this embodiment, the overall setting value station is also used for the operator to modify the overall setting value of the pressure of each atmospheric relief valve in the corresponding group to a single setting value before the pressure control mode of the atmospheric relief valve in the corresponding group is switched from the single setting mode to the overall setting mode, so as to ensure that the pressure setting mode of the atmospheric relief valve in the corresponding group is switched from the single setting mode to the overall setting mode without interference.

[0046] In this embodiment, the single-unit setting value station is provided with an AM pin, a PV pin and an OUT pin; when the AM pin value of the single-unit setting value station is 0, it indicates that the single-unit setting value station is in manual mode; when the AM pin value of the single-unit setting value station is 1, it indicates that the single-unit setting value station is in automatic mode;

[0047] The automatic control system for the atmospheric release valves of the sodium-cooled fast reactor multi-module also includes a hand operator, and one group of atmospheric release valves corresponds to one hand operator;

[0048] A hand operator, used for manually selecting the single-unit setting value station of each atmospheric release valve of the corresponding group as a manual mode or an automatic mode when the pressure setting mode of the atmospheric release valve of the corresponding group is the single-unit setting mode, automatically generating a manual and automatic mode selection signal of the single-unit setting value station of each atmospheric release valve of the corresponding group and sending it to the AM pin of the single-unit setting value station of each atmospheric release valve of the corresponding group;

[0049] When the pressure setting mode of the corresponding atmospheric relief valve of the single set value station is the single set mode, its AM pin value follows the input value of the handheld operator, its PV pin value follows the on-site measured value of the corresponding atmospheric relief valve pressure, and its OUT pin value follows the PV pin value.

[0050] In this embodiment, the sodium-cooled fast reactor multi-module atmospheric release valve automatic control system further includes an analog quantity switching module, and a group of atmospheric release valves corresponds to one analog quantity switching module;

[0051] The switching module is also used to send the pressure setting mode selection signal of the corresponding group of atmospheric release valves to the analog switching module of the corresponding group of atmospheric release valves;

[0052] The analog switching module is used to send the pressure setting mode selection signal of the corresponding group of atmospheric release valves to the AM pin of the single set value station of each atmospheric release valve in the corresponding group when the pressure setting mode of the corresponding group of atmospheric release valves is the overall setting mode, obtain the overall set value of the pressure of each atmospheric release valve in the corresponding group and send it to the PV pin of the single set value station of each atmospheric release valve in the corresponding group;

[0053] When the pressure setting mode of the corresponding group of atmospheric relief valves is the overall setting mode, the AM pin value of the single set value station is 0, and the OUT pin value follows the PV pin value. The PV pin value follows the overall setting value of the corresponding atmospheric relief valve pressure, ensuring that the pressure control mode of the corresponding group of atmospheric relief valves is switched from the overall setting mode to the single set mode without disturbance.

[0054] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sodium-cooled fast reactor multi-module atmospheric release valve automatic control system, characterized in that: It includes a switching module, a single set value station, an overall set value station, a pressure setting switching module and a PID; the atmospheric release valve is divided into one or more groups, one group of atmospheric release valves corresponds to one switching module and one overall set value station, and one atmospheric release valve corresponds to one single set value station, one pressure setting switching module and one PID; A switching module is provided with a switching button, which is used to generate a pressure setting mode selection signal of the corresponding group of atmospheric release valves and send it to the pressure setting switching modules of each atmospheric release valve of the corresponding group according to the pressure setting mode of the corresponding group of atmospheric release valves selected by the operator as a single setting mode or an overall setting mode when the corresponding group of atmospheric release valves is in the automatic control mode; The overall setting value station is used for the operator to set the pressure setting value of each atmospheric relief valve of the corresponding group as a whole, obtain the overall setting value of the pressure of each atmospheric relief valve of the corresponding group and send it to the pressure setting switching module of each atmospheric relief valve of the corresponding group; The single-unit setting value station is used for the operator to perform single-unit setting of the pressure setting value of the corresponding atmospheric relief valve, obtain the single-unit setting value of the pressure of the corresponding atmospheric relief valve and send it to the pressure setting switching module of the corresponding atmospheric relief valve; A pressure setting switching module, for sending a single set value or an overall set value of the pressure of the corresponding atmospheric release valve to the PID of the corresponding atmospheric release valve according to a pressure setting mode selection signal of the corresponding group of atmospheric release valves; PID is used to control the opening of the corresponding atmospheric relief valve according to the difference between the overall set value or the individual set value of the corresponding atmospheric relief valve pressure and the field measurement value.

2. The sodium-cooled fast reactor multi-module atmospheric release valve automatic control system according to claim 1, characterized in that: The switching module is provided with a switching button and an RS trigger connected to the output of the switching button, and the switching button is provided with a single setting mode and an overall setting mode; When the operator clicks the overall setting mode on the switch button, the S end of the RS trigger connected to the switch button is set, and the RS trigger sends a signal that the pressure setting mode of the corresponding group of atmospheric relief valves is the overall setting mode to the pressure setting switch modules of each atmospheric relief valve in the corresponding group; When the operator clicks the single-unit setting mode on the switch button, the R end of the RS trigger connected to the switch button is set, and the RS trigger sends a signal that the pressure setting mode of the corresponding group of atmospheric relief valves is the single-unit setting mode to the pressure setting switch modules of each atmospheric relief valve in the corresponding group.

3. The sodium-cooled fast reactor multi-module atmospheric release valve automatic control system according to claim 1, characterized in that: The pressure setting switching module is provided with an IN1 pin, an IN2 pin, an OUT pin and a SET pin, the SET pin receives a pressure setting mode selection signal of a corresponding group of atmospheric relief valves, the IN1 pin receives a single set value of the corresponding atmospheric relief valve pressure, and the IN2 pin receives an overall set value of the corresponding atmospheric relief valve pressure; When the pressure setting mode of the corresponding group of atmospheric release valves is the single setting mode received by the SET pin, the pressure setting switching module sends the single setting value of the corresponding atmospheric release valve pressure received by the IN1 pin to the PID of the corresponding atmospheric release valve through the OUT pin; When the pressure setting mode of the corresponding group of atmospheric relief valves received at the SET pin is the overall setting mode, the pressure setting switching module sends the overall setting value of the corresponding atmospheric relief valve pressure received at the IN2 pin to the PID of the corresponding atmospheric relief valve through the OUT pin.

4. The sodium-cooled fast reactor multi-module atmospheric release valve automatic control system according to claim 3, characterized in that: The PID is provided with an SP pin; the pressure setting switching module sends the overall setting value or the single setting value of the corresponding atmospheric relief valve pressure received by the IN1 pin or the IN2 pin to the SP pin of the PID corresponding to the atmospheric relief valve through the OUT pin.

5. The sodium-cooled fast reactor multi-module atmospheric release valve automatic control system according to claim 1, characterized in that: It also includes a hand operator, one set of atmospheric release valves corresponds to one hand operator; the single set value station is provided with an AM pin, a PV pin and an OUT pin; A hand operator, used for manually selecting the single-unit setting value station of each atmospheric release valve of the corresponding group as a manual mode or an automatic mode when the pressure setting mode of the atmospheric release valve of the corresponding group is the single-unit setting mode, automatically generating a manual and automatic mode selection signal of the single-unit setting value station of each atmospheric release valve of the corresponding group and sending it to the AM pin of the single-unit setting value station of each atmospheric release valve of the corresponding group; When the pressure setting mode of the corresponding atmospheric relief valve of the single set value station is the single set mode, its AM pin value follows the input value of the handheld operator, its PV pin value follows the on-site measured value of the corresponding atmospheric relief valve pressure, and its OUT pin value follows the PV pin value.

6. The sodium-cooled fast reactor multi-module atmospheric release valve automatic control system according to claim 5, characterized in that: The overall setting value station is also used for the operator to modify the overall setting value of the pressure of each atmospheric relief valve of the corresponding group to the individual setting value before the pressure control mode of the atmospheric relief valve of the corresponding group is switched from the individual setting mode to the overall setting mode.

7. The sodium-cooled fast reactor multi-module atmospheric release valve automatic control system according to claim 6, characterized in that: It also includes an analog quantity switching module, and a group of atmospheric release valves corresponds to one analog quantity switching module; The switching module is also used to send the pressure setting mode selection signal of the corresponding group of atmospheric release valves to the analog switching module of the corresponding group of atmospheric release valves; The analog switching module is used to send the pressure setting mode selection signal of the corresponding group of atmospheric release valves to the AM pin of the single set value station of each atmospheric release valve in the corresponding group when the pressure setting mode of the corresponding group of atmospheric release valves is the overall setting mode, obtain the overall set value of the pressure of each atmospheric release valve in the corresponding group and send it to the PV pin of the single set value station of each atmospheric release valve in the corresponding group; When the pressure setting mode of the corresponding group of atmospheric relief valves of the single set value station is the overall setting mode, its AM pin value is 0, its OUT pin value follows the PV pin value, and its PV pin value follows the overall setting value of the corresponding atmospheric relief valve pressure.

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