A nuclear power plant core instrumentation turnkey measurement processing system

Abstract

The application discloses a kind of for nuclear power plant reactor core instrument complete set measurement processing system, it is related to nuclear reactor core instrument technical field, solve the problem that existing technology is dispersed, pressure vessel penetrates interface, system interface and connecting cable complex in reactor core instrument, specific scheme is as follows: a kind of for nuclear power plant reactor core instrument complete set measurement processing system, sequentially connected reactor core instrument sleeve assembly, signal cable assembly, signal processing device;Multiple reactor core instrument sleeve assembly is arranged radially in reactor core, and thermocouple and multiple self-powered detector are arranged in the axial direction in reactor core instrument sleeve assembly, the core wire of thermocouple and self-powered detector is connected with the electrical connector at the top of reactor core instrument sleeve assembly, multiple reactor core instrument sleeve assembly is connected with one end of one signal cable assembly by electrical connector, the other end of signal cable assembly is provided with shunt pipe, and is connected with signal processing equipment by electrical connector in the form of one-to-many.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear reactor core instrumentation, in particular to a complete measurement and processing system for nuclear power plant core instrumentation. BACKGROUND

[0002] During the normal operation of a nuclear power plant, the reactor pressure vessel is in a harsh environment of high temperature, high pressure and high radiation. When the reactor operating power reaches a certain rated power, the core instrumentation system needs to continuously monitor the neutron flux rate inside the reactor core, remind the operator of the reactor safety margin, and correspondingly control the reactivity. At the same time, the system monitors the inlet and outlet temperatures in the reactor core under normal operation and post-accident conditions, and the relevant signals will be sent to the protection system to participate in the core protection and control. Multiple core instrumentation thimble assemblies need to be arranged in the reactor pressure vessel, and different core instrumentation thimble assemblies need to be connected to corresponding processing equipment through lines, resulting in the problems of dispersion of existing core instrumentation, multiple pressure vessel penetration interfaces, and complex system interfaces and connection cables. SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the present application is to provide a complete measurement and processing system for nuclear power plant core instrumentation, which splits different self-powered detectors and thermocouple signals or combines similar thermocouple signals, so as to achieve the purpose of signal classification and sending to the designated processing equipment, and simplifies the number of cables and containment penetration interfaces.

[0004] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0005] A complete measurement and processing system for nuclear power plant core instrumentation, comprising core instrumentation thimble assemblies, signal cable assemblies and signal processing devices connected in sequence.

[0006] Multiple core instrumentation thimble assemblies are arranged radially in the core, and thermocouples and multiple self-powered detectors are arranged axially in the core instrumentation thimble assemblies. The core wires of the thermocouples and self-powered detectors are connected to the electrical connectors at the top of the core instrumentation thimble assemblies. The multiple core instrumentation thimble assemblies are connected to one end of a signal cable assembly through the electrical connectors. The other end of the signal cable assembly is provided with a shunt tube, and is connected to the signal processing devices through the electrical connectors in a one-to-many form.

[0007] As a further implementation, the signal cable assembly is provided with electrical connectors at both ends. The electrical connectors at one end of the signal cable assembly are connected to the electrical connectors at the top of the multiple core instrumentation thimble assemblies, and the electrical connectors at the other end are connected to the electrical connectors of different signal processing devices. The signal cable assembly and the electrical connectors are an integrated structure, and the electrical connectors are pin or socket structures.

[0008] As a further implementation, the signal cable assembly comprises an electrical connector fixedly connected with the rear shell, the thermocouple signal cable and the self-powered detector signal cable are arranged in parallel inside the signal cable assembly, and the outside is a bend pipe connected with the rear shell, and the bend pipe is connected with a corrugated pipe joint and a corrugated pipe in sequence at the end away from the rear shell.

[0009] The corrugated pipe is connected with a branch pipe at the rear end to guide the thermocouple signal cable and the self-powered detector signal cable, and the outside of the signal cable is a corrugated pipe connected with a corrugated pipe joint and an electrical connector in sequence.

[0010] As a further implementation, the signal cable assembly comprises an electrical connector fixedly connected with the rear shell, the thermocouple signal cable and the self-powered detector signal cable are arranged in parallel inside the signal cable assembly, and the outside is a bend pipe connected with the rear shell, and the bend pipe is connected with a corrugated pipe joint and a corrugated pipe in sequence at the end away from the rear shell.

[0011] As a further implementation, the signal cable assembly comprises an electrical connector fixedly connected with the rear shell, the thermocouple signal cable and the self-powered detector signal cable are arranged in parallel inside the signal cable assembly, and the outside is a bend pipe connected with the rear shell, and the bend pipe is connected with a corrugated pipe joint and a corrugated pipe in sequence at the end away from the rear shell.

[0012] As a further implementation, the signal cable assembly comprises an electrical connector fixedly connected with the rear shell, the thermocouple signal cable and the self-powered detector signal cable are arranged in parallel inside the signal cable assembly, and the outside is a bend pipe connected with the rear shell, and the bend pipe is connected with a corrugated pipe joint and a corrugated pipe in sequence at the end away from the rear shell.

[0013] As a further implementation, the signal cable assembly comprises an electrical connector fixedly connected with the rear shell, the thermocouple signal cable and the self-powered detector signal cable are arranged in parallel inside the signal cable assembly, and the outside is a bend pipe connected with the rear shell, and the bend pipe is connected with a corrugated pipe joint and a corrugated pipe in sequence at the end away from the rear shell.

[0014] As a further implementation, the signal cable assembly comprises an electrical connector fixedly connected with the rear shell, the thermocouple signal cable and the self-powered detector signal cable are arranged in parallel inside the signal cable assembly, and the outside is a bend pipe connected with the rear shell, and the bend pipe is connected with a corrugated pipe joint and a corrugated pipe in sequence at the end away from the rear shell.

[0015] As a further implementation, the signal processing device comprises an amplifier board, a data link card, a communication module, a power module and an electrical connector, and the electrical connector is located at the top of the signal processing device and is connected with the electrical connector of the signal cable assembly.

[0016] As a further implementation, the signal processing device further comprises an AD conversion module for converting the signals of the signal cable assembly into digital signals.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The present application corresponds to a multifunctional core instrument thimble assembly comprising a plurality of measuring instrument elements, and a cable assembly connected therewith in a combined integrated structure, so that different self-powered detectors and thermocouple signals can be split or the same type of thermocouple signals can be combined in a one-to-many or many-to-one form, thereby achieving the purpose of signal classification and sorting to the designated processing equipment, and simplifying the number of cables and containment penetrations.

[0019] 2. The present application can include neutron detection instruments and a plurality of temperature detector instruments, which are integrated in a thimble assembly and inserted into a fuel assembly through an integrated manner, thereby greatly reducing the pressure vessel top opening and simplifying the system interface.

[0020] 3. The self-powered detectors and core thermocouples of the present application are arranged axially and spaced apart, which can greatly reduce the outer diameter of the core instrument thimble assembly, thereby achieving the effect of easy insertion into the guide tube of the pressure vessel and the reactor core. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation of the present application.

[0022] Figure 1 is a structural schematic diagram of a core instrument complete measurement and processing system in an embodiment of the present application.

[0023] Figure 2 is a structural schematic diagram of a core instrument thimble assembly in an embodiment of the present application.

[0024] Figure 3 is a schematic diagram of the arrangement of self-powered detectors and thermocouples in an embodiment of the present application.

[0025] Figure 4 is a working principle diagram of a rhodium self-powered detector in an embodiment of the present application.

[0026] Figure 5 is a structural schematic diagram of a one-to-many signal cable assembly in an embodiment of the present application.

[0027] In the drawings: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only schematic.

[0028] Wherein: 1. dust cover, 2. electrical connector, 3. rear shell, 4. rear shell manifold, 5. connecting pipe, 6. flexible bellows, 7. manifold connecting pipe, 8. manifold, 9. joint, 10. outer shell, 11. thermocouple, 12. self-powered detector, 13. fixing bracket, 14. fixing belt, 15. bullet head end plug, 16-1. electrical connector, 16-2. rear shell, 16-3. thermocouple signal cable, 16-4. self-powered detector signal cable, 16-5. brazing block, 16-6. elbow pipe, 16-7. bellows joint, 16-8. bellows, 16-9. branch pipe, 16-10. bellows, 16-11. bellows head, 16-12. bellows joint. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is illustrative only, and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] Example One

[0031] In one exemplary embodiment of the present application, referring to Figures 1-5 As shown in the drawings, a nuclear power plant core instrument complete measurement processing system for continuous measurement of neutron flux and temperature signals in a nuclear power plant reactor, the system has high integration of related complete equipment, including a core instrument sleeve assembly, a signal cable assembly, and a signal processing device connected in sequence; a plurality of core instrument sleeve assemblies are arranged radially in the core, and a thermocouple and a plurality of self-powered detectors are arranged axially in the core instrument sleeve assembly; the core of the thermocouple and the self-powered detector is connected to an electrical connector at the top of the core instrument sleeve assembly; the plurality of core instrument sleeve assemblies are connected to one end of the signal cable assembly through the electrical connector; the other end of the signal cable assembly is provided with a branch pipe, and is connected to the signal processing device through the electrical connector in a one-to-many form.

[0032] The core instrument sleeve assembly is connected to the signal cable assembly connector through the top connector, the multiple sections (forms) of the cable assembly are connected through the paired electrical connectors, and the cable assembly is connected to the signal processing cabinet or the electrical through-piece through the paired electrical connectors.

[0033] Specifically, as Figure 1As shown, the core instrumentation thimble assembly penetrates the reactor pressure vessel to send the self-powered detectors and thermocouples accurately positioned into the core design location for accurate measurement. The self-powered detectors and thermocouples should be able to withstand the harsh environment of high temperature, high pressure and high radiation inside the reactor. The signal cable assembly is arranged in the containment outside the pressure vessel, and its environmental conditions are relatively mild compared to the core instrumentation thimble assembly, but it also needs to withstand high temperature and high radiation dose conditions during the service life. The signal processing device can be arranged in the containment or outside the containment according to the engineering conditions of the nuclear power plant, and its arrangement position is usually not subjected to high temperature and high radiation environment conditions to ensure measurement accuracy.

[0034] The signal processing device includes two signal processing cabinets connected to the core instrumentation thimble assembly through the self-powered detector signal cable, and connected to the 1E interface system and the 1E and interface system through the 1E thermocouple signal cable and the non-1E thermocouple signal cable.

[0035] The core instrumentation thimble assembly is connected to the 1E interface system and the 1E and interface system through the 1E thermocouple signal cable and the non-1E thermocouple signal cable, respectively. The 1E thermocouple signal cable and the non-1E thermocouple signal cable, and the self-powered detector signal cable are integrated in one signal cable assembly.

[0036] The core instrumentation thimble assembly has high sealing and high integration, penetrates the top of the pressure vessel, and can contain various measuring instruments to reduce the pressure vessel interface. Each integrated self-powered detector has a consistent structure, is arranged axially in the core instrumentation thimble assembly, and the number of detectors should be confirmed according to the core monitoring requirements, but the total number of the multiple detectors arranged axially should ensure that the entire reactor core height is covered; the thermocouples can be arranged at the coolant outlet and inlet according to the monitoring requirements. The self-powered detectors and armored thermocouples can be positioned in the core instrumentation thimble assembly by effective fixation methods such as welding or fixation belts.

[0037] Specifically, the core instrumentation thimble assembly includes a shell 10, a fixed support 13 axially arranged in the shell, and a plurality of self-powered detectors 12 fixed on the fixed support 13. The self-powered detectors and the thermocouples are fixed on the fixed support by a fixation belt 14. The thermocouples 11 are armored thermocouples, two thermocouples 11 are fixed at both ends of the self-powered detectors, and the shell is also located at both ends of the shell. The two ends of the shell are located at the coolant inlet and outlet.

[0038] The self-powered detectors and the core thermocouples and other measuring instruments of the embodiment are arranged axially and spaced apart, which can reduce the outer diameter of the core instrumentation thimble assembly, thereby achieving the effect of easy insertion into the guide pipe of the pressure vessel and the reactor core.

[0039] Due to the non-vertical arrangement of the core instrument assembly in the pressure vessel, the arrangement space has a certain bending, so the bullet head structure is adopted at the end of the sleeve, which plays a guiding and friction reducing role during the assembly installation insertion. Specifically, a bullet head end plug 15 is arranged at one end of the shell. A joint 9 is arranged at the end away from the bullet head end plug of the shell, the joint 9 is connected with a header 8, the header 8 is connected with a flexible dense bellows 6, the header 8 is provided with a header upper connecting pipe 7 on the side, and the flexible dense bellows 6 is sequentially connected with a connecting pipe 5, a rear shell header 4, a rear shell 3 and an electrical connector 2. The electrical connector 2 is externally provided with a dust cover 1.

[0040] The lead wires of the self-powered detector and the thermocouple are welded with the terminal of the electrical connector 2. The self-powered detector 12 is composed of an emitter, a collector, an insulator, a signal core wire and a background wire, and all the self-powered detectors 12 are of the same specification. The self-powered detector is provided with a signal core wire and a corresponding background signal wire, which are transmitted through a signal cable, and are used to offset the signal noise in the reactor, so as to improve the signal accuracy and detection sensitivity of the detector.

[0041] The thermocouple and the self-powered detector are arranged in the core instrument sleeve assembly and connected with the top electrical connector, which reduces the electromagnetic interference of the environmental radiation on the above-mentioned instrument electrical circuit, and improves the accuracy and reliability of the temperature measurement and neutron flux measurement.

[0042] Specifically, one end of the header 8 is connected with the flexible dense bellows 6, the other end of the header 8 is welded and connected with the shell 10 through the joint 9, the flexible dense bellows 6 is welded with the rear shell 3, the rear shell 3 is welded with the electrical connector 2, the dust cover 1 is screwed onto the electrical connector 2, one end of the header 8 is welded with the shell 10 through the joint 9, and the bullet head end plug 15 is welded and sealed after the shell 10 is filled with nitrogen.

[0043] The top of the core instrument sleeve assembly is provided with an electrical connector, the pins of which are connected with the signal core wires of the self-powered detector and the thermocouple, which are used to be connected with the electrical connector of the signal cable assembly.

[0044] The self-powered detector of the embodiment does not need an external bias power supply, and can spontaneously form a current by absorbing neutrons in the nuclear power plant reactor. The self-powered neutron detector adopts a low burn-up material, which greatly improves the service life. The emitter of the self-powered detector adopts a metal material with a large thermal neutron reaction cross section, which can use sensitive materials such as vanadium, rhodium and cobalt.

[0045] The self-powered neutron detector and the thermocouple adopt inorganic armored cables, which can withstand harsh environments such as high temperature, high pressure, high corrosion and strong radiation in the core. The self-powered detector uses high-purity aluminum oxide as the insulating material, which is not easy to absorb moisture and is not easy to age, has high high-temperature insulation resistance, has little influence on neutron penetration, and can effectively improve the measurement accuracy of the self-powered neutron detector.

[0046] The core instrument assembly is first evacuated and then filled with inert gas such as nitrogen at least 1 atm to avoid the participation of air with complex composition in nuclear reaction and thus to improve stability.

[0047] The core instrument thimble assembly of the embodiment can include neutron detection instruments and various temperature detector instruments, which are integrated in one thimble assembly and inserted into the fuel assembly, greatly reducing the opening at the top of the pressure vessel and simplifying the system interface.

[0048] As shown in Figure 5 The signal cable assembly is provided with electrical connectors 16-1 at both ends, the electrical connector 16-1 at one end of the signal cable assembly is connected with the electrical connectors at the top of the plurality of core instrument thimble assemblies, and the electrical connector at the other end is connected with the electrical connector of different signal processing equipment. The signal cable assembly and the electrical connector are integrated in one structure, avoiding the problems of complex lines and messy cable connection in the core instrument measurement and processing system. The electrical connector adopts a pin or a socket structure.

[0049] The signal cable assembly includes a flexible bellows, a cable tube inserted in the bellows, and electrical connectors at both ends of the cable. The cable includes a shell and a core wire, the shell is a stainless steel seamless steel pipe, the core wire is a conductor material, and the shell and the core wire are filled with insulation material. The shell, the core wire and the insulation material are drawn, annealed and become a flexible armored whole. The shell of the electrical connector is made of stainless steel material, and the cable core wire and the pin or socket of the electrical connector are fixed by welding. The signal cable assembly is usually made in the form of integrated cable and connector, which can guarantee the related sealing and electrical performance, and is convenient and fast to plug and maintain.

[0050] The cable assembly connector and the core instrument thimble assembly connector should be able to be connected in pairs. The cable signal assembly is used to transmit self-powered detector and thermocouple signals. In order to simplify the interface form, it is designed in the form of combined integrated cable assembly (one-to-three and seven-in-one, etc.), which can send self-powered detector signals and outlet / inlet thermocouple signals to different signal processing equipment, and can also aggregate the thermocouple signals in different core instrument thimble assemblies into one cable for transmission. Therefore, the core instrument system cable assembly is designed in various forms, and finally different signals are sent to different interface equipment.

[0051] Specifically, the signal cable assembly includes an electrical connector 16-1, which is fixedly connected with the rear shell 16-2 by welding, and inside the signal cable assembly, a thermocouple signal cable 16-3 and a self-powered detector signal cable 16-4 are arranged side by side by welding, and a brazing block 16-5 is further arranged. The outside is connected with the rear shell. The elbow pipe 16-6 is connected with the corrugated pipe joint 16-7 and the corrugated pipe 16-8 in sequence at the end away from the rear shell. The corrugated pipe is connected with the shunt pipe 16-9 at the rear, which is used to guide the unused thermocouple signal cable and self-powered detector signal cable. The outside of the signal cable is a multi-section corrugated pipe 16-10, which is connected with the corrugated pipe head 16-11 and the corrugated pipe joint 16-12 in sequence. The corrugated pipe joint is connected with the electrical connector, which realizes the integration of multiple self-powered detector signal cables and thermocouple signal cables on one signal cable assembly, adopts a one-to-many form, solves the problem of messy signal cable wiring, and has the effect of one-to-many integrated cable assembly.

[0052] As shown in Figure 1 The one-to-many integrated cable assembly can transmit 1E-level thermocouple signals, non-1E-level thermocouple signals and self-powered detector signals to different interface systems and devices, thereby reducing the number of core instrument sleeve assemblies and cable assemblies, and greatly reducing the opening of the pressure vessel penetration, thereby reducing the risk of leakage.

[0053] The cable assembly shell of the embodiment is made of stainless steel seamless steel pipe, which has good cable strength, flame retardation, high temperature resistance, radiation resistance, moisture resistance, chemical stability and long service life, can meet the normal, abnormal and accident environmental conditions in the containment of a nuclear power plant, and can meet the 60-year service life of the third-generation nuclear power plant.

[0054] Corresponding to the multifunctional core instrument sleeve assembly containing multiple measuring instrument elements, the cable assembly connected therewith adopts a combined integrated structure, that is, different self-powered detectors and thermocouple signals can be split or similar thermocouple signals can be combined through one-to-many or many-in-one, so as to achieve the purpose of signal classification and sending to the designated processing equipment, and simplify the number of cables and containment penetration interfaces.

[0055] The signal processing device includes an amplifier board, a data link card, a communication module, a power module and an electrical connector. The electrical connector is located at the top of the signal processing device and is connected with the electrical connector of the signal cable assembly. The signal processing device further includes an AD conversion module for converting the signals of the signal cable assembly into digital signals.

[0056] Specifically, the core instrument signal processing device receives the multi-channel micro-current signals from the self-powered detector, first processes the weak signals through conditioning and amplification, then converts the signals into digital signals through an AD conversion module, and outputs the signals to the corresponding application server and the core online monitoring system in the nuclear power plant through a signal transmission module, converts the signals into core power distribution data, and displays the data on the corresponding screen. The interface module of the device adapts to the signal interfaces of different types of detectors, and can also receive test signals input by external devices to calibrate and calibrate the signal conditioning circuit. At the same time, the core instrument signal processing device is provided with a channel detection function to collect data such as leakage resistance of the signal transmission channel, which is used to correct the sensor signal.

[0057] The signal processing cabinet of the embodiment can process nA-level weak current signals from the self-powered detector, has high precision and small temperature drift, improves the channel precision requirement of the system, meets the operation requirement of the reactor on the low-power platform, the core instrument sleeve assembly is symmetrically arranged in the reactor, the signal processing cabinet and the internal power supply, communication and processing modules are redundantly designed, and the safety and reliability of the nuclear power plant are improved.

[0058] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A complete measurement and processing system for instrumentation in a nuclear power plant core, characterized in that, It includes a core instrument bushing assembly, a signal cable assembly, and a signal processing device connected in sequence. Multiple core instrumentation assemblies are arranged radially inside the core. Thermocouples and multiple self-powered detectors are installed axially inside the core instrumentation assemblies. The core wires of the thermocouples and self-powered detectors are connected to the electrical connectors at the top of the core instrumentation assemblies. One end of the multiple core instrumentation assemblies is connected to a signal cable assembly via an electrical connector. The other end of the signal cable assembly is provided with a branch pipe, which is connected to the signal processing equipment in a one-to-many configuration via an electrical connector. The signal cable assembly is provided with electrical connectors at both ends. The electrical connector at one end of the signal cable assembly is connected to the electrical connectors on the top of multiple core instrument bushing assemblies, and the electrical connector at the other end is connected to the electrical connectors of different signal processing devices. The signal cable assembly and the electrical connector are integrated into one piece, and the electrical connector is a pin or socket structure. The signal cable assembly includes an electrical connector, which is fixedly connected to the rear housing. Inside the signal cable assembly, thermocouple signal cables and self-powered detector signal cables are arranged side by side. The outside is a bent conduit connected to the rear housing. The end of the bent conduit away from the rear housing is connected in sequence to a corrugated pipe joint and a corrugated pipe. A branch pipe is connected to the corrugated pipe to guide the thermocouple signal cables and self-powered detector signal cables. The outside of the signal cables is a corrugated pipe, which is connected in sequence to a corrugated pipe head and a corrugated pipe joint. The corrugated pipe joint is connected to the electrical connector. Multiple self-powered detector signal cables and thermocouple signal cables are integrated into one signal cable assembly, adopting a one-to-many splitter configuration to classify and organize signals and send them to the designated processing equipment, simplifying the number of cables and the interface of the containment penetration. The core instrument bushing assembly includes a housing, inside which multiple self-powered detectors are axially fixed. Thermocouples are fixed at both ends of the self-powered detectors, and a bullet-shaped end plug is provided at one end of the housing. The leads of the self-powered detectors and thermocouples are welded to the terminals of an electrical connector.

2. The complete measurement and processing system for nuclear power plant core instrumentation according to claim 1, characterized in that, A fixed bracket is provided axially inside the housing, and the self-powered detector and the thermocouple are fixed to the fixed bracket by a fixing strap.

3. A complete measurement and processing system for nuclear power plant core instrumentation according to claim 2, characterized in that, The outer shell is provided with a connector at the end away from the bullet end plug. The connector is connected to a manifold, which is connected to a flexible corrugated pipe. The flexible corrugated pipe is connected in sequence to a connecting pipe, a rear shell manifold, a rear shell, and an electrical connector.

4. A complete measurement and processing system for nuclear power plant core instrumentation according to claim 3, characterized in that, The electrical connector is fitted with a dust cover.

5. A complete measurement and processing system for nuclear power plant core instrumentation according to claim 4, characterized in that, The self-powered detector is equipped with a signal core wire and a corresponding background signal wire, which are transmitted through a signal cable.

6. A complete measurement and processing system for nuclear power plant core instrumentation according to claim 1, characterized in that, The signal processing device includes an amplifier board, a data link card, a communication module, a power supply module, and an electrical connector. The electrical connector is located on the top of the signal processing device and is paired with the electrical connector of the signal cable assembly.

7. A complete measurement and processing system for nuclear power plant core instrumentation according to claim 6, characterized in that, The signal processing device also includes an AD conversion module for converting the signals from the signal cable assembly into digital signals.

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