CN109581922B - Preprocessing device for neutron pulse signals of reactor - Google Patents
Preprocessing device for neutron pulse signals of reactor Download PDFInfo
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- CN109581922B CN109581922B CN201811466156.3A CN201811466156A CN109581922B CN 109581922 B CN109581922 B CN 109581922B CN 201811466156 A CN201811466156 A CN 201811466156A CN 109581922 B CN109581922 B CN 109581922B
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Abstract
The invention discloses a pretreatment device for neutron pulse signals in a reactor, which comprises a pulse amplification module, a parameter adjusting module, a low-voltage power supply module and a high-voltage power supply module, wherein the pulse amplification module is used for amplifying a neutron pulse signal; the pulse signal output by the neutron detector is subjected to discrimination, shaping and amplification pretreatment by the pulse amplification module and then input into a far-end pulse signal acquisition device; the parameter adjusting module is connected with a remote control system, and the remote setting and adjustment of control parameters are realized by the remote control system; the low-voltage power supply module is powered by an external power supply and respectively provides working power supplies for the pulse amplification module, the high-voltage power supply module and the parameter regulation module; the high-voltage power supply module provides a high-voltage power supply signal and a high-voltage image signal for the pulse amplification module. The invention has the characteristics of integration and intellectualization, and solves the problems of large signal transmission interference and poor parameter regulation stability of the existing system.
Description
Technical Field
The invention relates to the field of nuclear industry, in particular to a pretreatment device for a neutron pulse signal in a reactor.
Background
The pretreatment device of the neutron pulse signal is a device for carrying out on-site treatment on the output signal of a neutron detector in a reactor and is used for screening, shaping and amplifying the neutron pulse signal. The signal processing result of the device is used for acquiring neutron pulse count of remote nuclear detection equipment. The monitoring of neutron pulse signals is an important way to obtain dynamic parameters during the first physical start-up test and operation of the reactor, in particular for neutron counting supervision and reactor critical extrapolation, which is essential for safe operation of the reactor. The pretreatment device of the neutron pulse signal is an important guarantee for the monitoring accuracy of the neutron pulse signal in the nuclear detection equipment.
The existing neutron pulse signal preprocessing device only comprises a preamplifier, a pulse main amplifier for screening the neutron pulse signals and a high-voltage power supply for working of a neutron detector are arranged in a remote nuclear detection device, and the neutron pulse signals are easily interfered by noise in long-distance transmission between the preamplifier and the main amplifier to cause the distortion of neutron pulse signal acquisition. In addition, the control parameter setting of the conventional neutron pulse signal preprocessing device is finished in a key or knob mode, and the maintainability and the stability of parameters are lacked.
Disclosure of Invention
In order to solve the technical problems, the invention provides a low-noise reactor neutron pulse signal preprocessing device which integrates a preamplifier, a pulse main amplifier and a high-voltage power supply into a whole and has intelligent adjustment and control parameters, so that the interference of neutron pulse signals in the transmission process is reduced, and the maintainability and the stability of the device are improved.
The invention is realized by the following technical scheme:
a pretreatment device for neutron pulse signals in a reactor comprises a pulse amplification module, a parameter adjusting module, a low-voltage power supply module and a high-voltage power supply module;
the pulse signal output by the neutron detector is subjected to discrimination, shaping and amplification pretreatment by the pulse amplification module and then input into a far-end pulse signal acquisition device;
the parameter adjusting module is connected with a remote control system, and the remote setting and adjustment of control parameters are realized by the remote control system;
the low-voltage power supply module is powered by an external power supply and respectively provides working power supplies for the pulse amplification module, the high-voltage power supply module and the parameter regulation module;
the high-voltage power supply module provides a high-voltage power supply signal and a high-voltage image signal for the pulse amplification module.
Preferably, the pulse amplification module integrates a pre-amplification component and a main amplification component, the pre-amplification component receives a pulse signal output by the neutron detector, and the pulse signal is sent to the main amplification component after passing through an isolation, amplification and buffer circuit; the main amplification component receives the signal output by the pre-amplification component, and the signal is input to the far-end pulse signal acquisition equipment after being subjected to integral/differential pulse amplification, baseline restoration, amplitude discrimination, shaping and buffering circuits.
Preferably, the pulse amplifier integrates a pre-amplification component and a main amplification component, the pre-amplification component is directly connected with the neutron detector through a multilayer shielding coaxial cable, and neutron pulse signals are sequentially output to the main amplification component through a matching isolation circuit, a two-stage amplification circuit, a differential amplification circuit and a buffer circuit in the pre-amplification component; meanwhile, a high-voltage power supply signal output by the high-voltage power supply module is denoised by a high-voltage filter circuit in the preamplification component and then is loaded on the neutron detector through a coaxial cable to serve as a working power supply of the neutron detector; the working power supply of the amplifying circuit in the pre-amplifying assembly is provided by the low-voltage power supply module; the pre-amplification assembly is directly butted with the main amplification assembly through a connector.
Preferably, the neutron pulse signal processed by the preamplification component is received by the main amplification component, and then the neutron pulse signal is processed by a first-stage amplification circuit, a zero cancellation circuit, an amplification factor adjustable circuit, an integral amplification circuit, a zero setting circuit, an attenuation circuit and a baseline restoration circuit in the main amplification component, and finally processed by a discrimination comparison circuit, shaped and output and transmitted to a far-end signal acquisition device; the parameter adjusting module and the high-voltage power supply module respectively output high/low discrimination threshold and high-voltage image signals to the far-end signal acquisition equipment through the main amplifying assembly; and the working power supply of the circuit in the main amplification assembly is provided by a low-voltage power supply module.
Preferably, the parameter adjusting module comprises a communication interface component and a numerical control adjusting component;
the communication interface component is connected with a remote control system through a bus protocol to realize the isolation and buffering of remote control signals; the numerical control adjusting assembly is connected with the communication interface assembly through two digital potentiometer chips, and remote setting of converting digital command signals of high voltage and discrimination threshold into analog signals is achieved.
Preferably, the communication interface component comprises a signal connector, a noise reduction circuit, an isolation protection circuit and an output buffer circuit; the signal connector receives a digital signal input by a remote control system; and then the remotely input digital signal sequentially passes through the noise reduction circuit, the isolation protection circuit and the output buffer circuit, and is converted into a clear jitter-free output signal which is used as an input signal of the numerical control adjusting component.
Preferably, the numerical control adjusting assembly comprises two digital potentiometer chips, a following circuit and a wiring terminal; the digital signals processed by the communication interface component are respectively sent to the two digital potentiometer chips, when the digital potentiometer chips are enabled by the chip selection signal, the input digital signals are input into a potentiometer register in the chips and used for setting the positions of contacts of the potentiometers in the chips, different contact positions represent different remote settings, and meanwhile, the contact position information can be stored in an on-chip memory; the conversion of two types of parameters of high voltage and discrimination threshold is realized according to the difference of chip selection signals, one digital potentiometer outputs a high-voltage analog signal, and the other digital potentiometer outputs a discrimination threshold analog signal; the high-voltage analog signal and the discrimination threshold analog signal are sequentially output to a control end of the high-voltage power supply module and a discrimination threshold input end of the pulse amplification module through the following circuit and the wiring terminal; and the working power supply of the digital potentiometer is provided by a low-voltage power supply module.
Preferably, the digital signals received by the signal connector comprise a clock signal, an input signal, an output signal, a high-voltage chip selection signal, a screening threshold chip selection signal and a preparation signal.
Preferably, the pulse amplification module comprises 6 input interfaces and 5 output interfaces, and the input interfaces comprise a pulse signal preprocessing interface, a high discrimination threshold input interface, a low discrimination threshold input interface, a high-voltage mirror signal input interface, a high-voltage power supply input interface and a low-voltage power supply input interface; the output interfaces comprise a high discrimination threshold pulse signal output interface, a low discrimination threshold pulse signal output interface, a high-voltage mirror signal output interface, a high discrimination threshold output interface and a low discrimination threshold output interface.
Preferably, all output signals in the preprocessing device are collected in the pulse amplification module and output to the far-end signal acquisition device, so that integration of signal transmission is realized.
The invention has the following advantages and beneficial effects:
1. the invention is used for screening, shaping and amplifying output signals of a neutron detector in a reactor, and transmitting the output signals to remote nuclear detection equipment for pulse signal acquisition so as to be used for neutron counting supervision and critical extrapolation of the reactor; the invention provides the capability of a novel neutron pulse signal preprocessing device for the nuclear equipment of the reactor.
2. The invention realizes the modular design of the neutron pulse signal preprocessing device; the integrated pretreatment of neutron pulse signals is realized: based on the characteristic that a neutron pulse signal transmission process is easy to interfere, the functions of pulse signal discrimination, shaping and amplification are realized by adopting a method of centralized and local configuration of a pulse preamplifier and a main amplifier. The pulse amplification module integrates a pre-amplification component and a main amplification component, and signal transmission between the pre-amplification component and the main amplification component is realized inside the module. The preamplification component receives a pulse signal output by the neutron detector, and the pulse signal is sent to the main amplification component after passing through an isolation, amplification and buffer circuit; the main amplification component is input to the far-end pulse signal acquisition equipment after being subjected to integral/differential pulse amplification, baseline restoration, amplitude discrimination, shaping and buffering circuits.
3. The invention realizes the intelligent parameter adjustment of the control parameters: based on the intelligent adjustment technology of the digital potentiometer, the parameter adjustment module is connected with a remote control system in the form of an SPI bus interface, and the function of setting control parameters by remote software is realized. The parameter adjusting module integrates an SPI communication interface and a digital potentiometer. The SPI communication interface receives parameter adjusting digital signals output by the remote control system through the serial port connector, and sends the parameter adjusting digital signals to the two groups of digital potentiometers after passing through the isolation buffer chip; the two groups of digital potentiometers convert digital signals of control parameters into analog signals through programming of a remote control system, and the analog signals are respectively output to the pulse amplification module and the high-voltage power supply module after being buffered and isolated by the following circuit.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a working principle diagram of a neutron pulse signal preprocessing device.
Fig. 2 is a schematic diagram of a pulse amplification module.
FIG. 3 is a schematic diagram of a parameter adjustment module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The working principle is as follows: the neutron pulse signal preprocessing device adopts a modular pulse amplification module, integrates a pulse signal pre-amplification component and a main amplification component nearby, realizes all preprocessing functions of discrimination, shaping, amplification and the like of pulse signals, and reduces noise interference caused by long-distance transmission of the pulse signals; an independent intelligent parameter adjusting module is constructed, the parameter setting of a remote control system is received through an SPI bus interface, and a digital potentiometer is utilized to realize the adjustment of a pulse amplification discrimination threshold and the working high voltage of a neutron detector without keys.
As shown in fig. 1, the neutron pulse signal preprocessing device of this embodiment adopts a modularized and miniaturized design technology, and is integrally designed into a portable case with input/output interfaces, and the internal structure is divided into four relatively independent modules according to different functions, namely, a pulse amplification module, a parameter adjustment module, a low-voltage power module, and a high-voltage power module. Each module is protected by an independent square shell, corresponding connectors are arranged on the surfaces of the shells, and the modules are connected through cables among the connectors in a signal mode.
The neutron pulse signal preprocessing device box body is provided with 3 input interfaces and 5 output interfaces. The input interface comprises a neutron pulse signal input interface, a parameter adjusting signal input interface and an external power supply input interface. The neutron pulse signal input interface is connected with the neutron detector and receives a pulse signal output by the neutron detector; the parameter adjusting signal input interface is connected with the remote control system and receives the parameter adjusting digital signal; the box external power input interface is connected with an external low-voltage power supply and receives the supply of the external power supply. The output interface comprises a 2-path neutron pulse signal output interface and a 3-path analog signal output interface. The neutron pulse signal output interface is connected with a far-end pulse signal acquisition device and used for sending a high discrimination threshold pulse signal and a low discrimination threshold pulse signal which are discriminated, shaped and amplified; the analog signal output interface is connected with the far-end analog signal acquisition equipment and used for sending signals of a high discrimination threshold and a low discrimination threshold of the pulse amplification module and image signals of the high-voltage power supply.
The pulse amplification module realizes the preprocessing function of the neutron pulse signal and comprises 6 input interfaces and 5 output interfaces. The input interface comprises a pulse signal preprocessing interface, a high discrimination threshold input interface, a low discrimination threshold input interface, a high-voltage mirror signal input interface, a high-voltage power supply input interface and a low-voltage power supply input interface. The output interfaces comprise a high discrimination threshold pulse signal output interface, a low discrimination threshold pulse signal output interface, a high-voltage mirror signal output interface, a high discrimination threshold output interface and a low discrimination threshold output interface.
The parameter adjusting module realizes the communication with a remote control system and the function of converting digital signals adjusted by parameters into analog signals, and comprises 2 input interfaces and 2 output interfaces. The input interface comprises an SPI communication interface and a low-voltage power supply input interface; the output interfaces comprise a high discrimination threshold output interface, a low discrimination threshold output interface and a high-voltage control signal output interface.
The high-voltage power supply module realizes the function of controlling high-voltage (0-1000V) output by low-voltage analog signals (0-5V), and comprises 2 input interfaces and 2 output interfaces. The input interface comprises a high-voltage control signal input interface and a low-voltage power supply input interface; the output interface comprises a high-voltage power supply output interface and a high-voltage mirror image (0-5V) signal output interface.
The low-voltage power supply module provides working power supply for other functional modules in the box body and comprises a 1-path input interface and a 4-path output interface. The input interface is a working power supply provided by an external low-voltage power supply for the box body; a power filter, a DC-DC power module and a positive and negative voltage regulator are integrated in the module, and the functions of power supply noise reduction, numerical value conversion and polarity conversion are respectively realized.
In this embodiment, the core of the neutron pulse signal preprocessing device is the integrated preprocessing of the pulse signal, and the neutron pulse signal preprocessing device is designed as a relatively independent pulse amplification module, and the specific structure is divided into a pre-amplification component and a main amplification component. The preamplifier assembly is integrated in an independent shielding box, is mounted on the main amplifier assembly circuit board through a connector, and realizes input and output of signals with other modules through the connector, as shown in fig. 2.
The pre-amplification assembly is directly connected with the neutron detector through a multilayer shielding coaxial cable, a neutron pulse signal keeps the effectiveness of the signal through an impedance matching and isolating circuit, then a two-stage triode amplification circuit is used for carrying out input protection on the signal, and the signal is output to the main amplification assembly through differential shaping and matching impedance; meanwhile, a high-voltage signal output by the high-voltage power supply module is subjected to denoising processing through a high-voltage filter circuit arranged in the component, and then is loaded on the neutron detector through a coaxial cable to serve as the working voltage of the neutron detector; the working power supply of the amplifying circuit is supplied by the low-voltage power supply module; the pre-amplification assembly is directly butted with the main amplification assembly through the connector, and noise interference caused by cable transmission signals is eliminated.
The main amplification assembly receives neutron pulse signals processed by the pre-amplification assembly, the signals pass through a first-stage amplification circuit, an amplification circuit with adjustable amplification factor and capable of extremely zero cancellation, and then pass through functional circuits such as integration, zero adjustment, attenuation and baseline restoration, and finally pass through a discrimination comparison circuit for processing, shaping and outputting, and then transmitting to a far-end signal acquisition device; the parameter adjusting module and the high-voltage power supply module respectively output high/low discrimination threshold and high-voltage image analog signals to the far-end signal acquisition equipment through the main amplifying assembly; the working power supply of the circuit in the assembly is supplied by the low-voltage power supply module; all output signals of the whole preprocessing device are collected to be output by the main amplifying assembly, and are output to the remote acquisition equipment through the output buffer, the isolation and the driving circuit, so that the integration of signal transmission is realized.
In this embodiment, neutron pulse signal preprocessing device control parameter adjusts the mode that adopts digital potentiometer to adjust, replaces the manual knob debugging mode of tradition, designs for independent parameter control module in the device, and concrete structure divide into SPI communication interface subassembly and numerical control adjusting part. The two-part assembly is integrated on a circuit board and connected to other modules through an external housing, as shown in fig. 3. In other embodiments, other communication interface components may be used.
The SPI communication interface assembly is connected with a remote control system through an SPI bus protocol, and the isolation and buffering functions of remote control signals are achieved. The whole process is as follows: according to the specification of an SPI bus protocol, a signal connector receives 6 paths of digital signals input by a remote control system, wherein the digital signals comprise clock signals, input signals, output signals, high-voltage chip selection signals, screening threshold chip selection signals and preparation signals; the method comprises the following steps that (1) remotely input 6 paths of digital signals are firstly processed by a noise reduction circuit, so that the accuracy of input signals of a digital potentiometer is ensured, and the function of suppressing signal line noise of devices such as capacitors and magnetic beads is mainly utilized to realize the purpose; then, the protection function is ensured when the power supply is inserted by mistake from the outside through an isolation protection circuit, and the protection function is mainly realized by utilizing the amplitude limiting and the protection function of a switching diode; and the remote input slow input signal is converted into a clear output signal without jitter through an output buffer circuit, and the output signal is used as an input signal of the digital potentiometer and is mainly realized by utilizing the function of an inverting buffer of a Schmitt trigger.
The numerical control adjusting assembly is connected with the SPI communication interface assembly through two digital potentiometer chips, and the remote setting function of converting digital command signals of high voltage and discrimination threshold into analog signals is achieved. The whole process is as follows: after the isolation buffering processing of the SPI communication interface assembly, 6 paths of digital signals are respectively sent to two digital potentiometer chips, when a chip selection signal enables the digital potentiometer chips, the input 24-bit digital signals are input into a potentiometer register in the chip in a programming mode and are used for setting the positions of contacts of the potentiometer in the chip, different contact positions represent different remote settings, and meanwhile, contact position information can be stored in an on-chip memory and is used for loading the contact position information after the device is powered up again; the conversion of two types of parameters of high voltage and discrimination threshold is realized according to the difference of chip selection signals, a first digital potentiometer outputs 1 path of high voltage analog signals, and a second digital potentiometer outputs high discrimination threshold and low discrimination threshold analog signals; the 3-path analog signal utilizes a voltage follower as an intermediate stage to isolate the mutual influence of input and output signals, and the output end of the follower circuit is respectively output to the control end of the high-voltage power supply module and the discrimination threshold input end of the pulse amplification module through a wiring terminal; in addition, the working power supply of the digital potentiometer is supplied by the low-voltage power supply module.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A pretreatment device for neutron pulse signals in a reactor is characterized by comprising a pulse amplification module, a parameter adjusting module, a low-voltage power supply module and a high-voltage power supply module;
the pulse signal output by the neutron detector is subjected to discrimination, shaping and amplification pretreatment by the pulse amplification module and then input into a far-end pulse signal acquisition device;
the parameter adjusting module is connected with a remote control system, and the remote setting and adjustment of control parameters are realized by the remote control system;
the low-voltage power supply module is powered by an external power supply and respectively provides working power supplies for the pulse amplification module, the high-voltage power supply module and the parameter regulation module;
the high-voltage power supply module provides a high-voltage power supply signal and a high-voltage image signal for the pulse amplification module;
the parameter adjusting module comprises a communication interface component and a numerical control adjusting component;
the communication interface component is connected with a remote control system through a bus protocol to realize the isolation and buffering of remote control signals; the numerical control adjusting component is connected with the communication interface component through two digital potentiometer chips, so that the remote setting of converting digital command signals of high voltage and discrimination threshold into analog signals is realized;
the communication interface component comprises a signal connector, a noise reduction circuit, an isolation protection circuit and an output buffer circuit; the signal connector receives a digital signal input by a remote control system; then the remote input digital signal passes through a noise reduction circuit, an isolation protection circuit and an output buffer circuit in sequence, and the remote input digital signal is converted into a clear output signal without jitter and used as an input signal of the numerical control adjusting component;
the numerical control adjusting assembly comprises two digital potentiometer chips, a following circuit and a wiring terminal; the digital signals processed by the communication interface component are respectively sent to the two digital potentiometer chips, when the digital potentiometer chips are enabled by the chip selection signal, the input digital signals are input into a potentiometer register in the chips and used for setting the positions of contacts of the potentiometers in the chips, different contact positions represent different remote settings, and meanwhile, the contact position information can be stored in an on-chip memory; the conversion of two types of parameters of high voltage and discrimination threshold is realized according to the difference of chip selection signals, one digital potentiometer outputs a high-voltage analog signal, and the other digital potentiometer outputs a discrimination threshold analog signal; the high-voltage analog signal and the discrimination threshold analog signal are sequentially output to a control end of the high-voltage power supply module and a discrimination threshold input end of the pulse amplification module through the following circuit and the wiring terminal; and the working power supply of the digital potentiometer is provided by a low-voltage power supply module.
2. The pretreatment device for the neutron pulse signal of the reactor according to claim 1, wherein the pulse amplification module integrates a pre-amplification component and a main amplification component, the pre-amplification component receives the pulse signal output by the neutron detector, and the pulse signal is sent to the main amplification component after passing through an isolation, amplification and buffer circuit; the main amplification component receives the signal output by the pre-amplification component, and the signal is input to the far-end pulse signal acquisition equipment after being subjected to integral/differential pulse amplification, baseline restoration, amplitude discrimination, shaping and buffering circuits.
3. The pretreatment device for the neutron pulse signal of the reactor according to claim 1, wherein the pulse amplifier integrates a pre-amplification component and a main amplification component, the pre-amplification component is directly connected with the neutron detector through a multilayer shielding coaxial cable, and the neutron pulse signal is output to the main amplification component through a matching isolation circuit, a two-stage amplification circuit, a differential amplification circuit and a buffer circuit in the pre-amplification component in sequence; meanwhile, a high-voltage power supply signal output by the high-voltage power supply module is denoised by a high-voltage filter circuit in the preamplification component and then is loaded on the neutron detector through a coaxial cable to serve as a working power supply of the neutron detector; the working power supply of the amplifying circuit in the pre-amplifying assembly is provided by the low-voltage power supply module; the pre-amplification assembly is directly butted with the main amplification assembly through a connector.
4. The pretreatment device for the neutron pulse signal of the reactor according to claim 3, wherein the neutron pulse signal processed by the pre-amplification assembly is received by the main amplification assembly, and then is processed by a primary amplification circuit, a zero-crossing cancellation circuit, an amplification factor adjustable circuit, an integral amplification circuit, a zero-setting circuit, an attenuation circuit and a baseline restoration circuit in the main amplification assembly, and finally is processed by a discrimination comparison circuit, shaped and output and transmitted to a far-end signal acquisition device; the parameter adjusting module and the high-voltage power supply module respectively output high/low discrimination threshold and high-voltage image signals to the far-end signal acquisition equipment through the main amplifying assembly; and the working power supply of the circuit in the main amplification assembly is provided by a low-voltage power supply module.
5. The apparatus for preprocessing a neutron pulse signal in a reactor according to claim 1, wherein the digital signal received by the signal connector comprises a clock signal, an input signal, an output signal, a high voltage chip selection signal, a discrimination threshold chip selection signal and a preparation signal.
6. The pretreatment device for the neutron pulse signal in the reactor according to claim 1, wherein the pulse amplification module comprises 6 input interfaces and 5 output interfaces, and the input interfaces comprise a pulse signal pretreatment interface, a high discrimination threshold input interface, a low discrimination threshold input interface, a high-voltage mirror signal input interface, a high-voltage power supply input interface and a low-voltage power supply input interface; the output interfaces comprise a high discrimination threshold pulse signal output interface, a low discrimination threshold pulse signal output interface, a high-voltage mirror signal output interface, a high discrimination threshold output interface and a low discrimination threshold output interface.
7. The pretreatment device for the neutron pulse signal of the reactor according to claim 1, wherein all output signals in the pretreatment device are collected in the pulse amplification module and output to the remote signal acquisition equipment, so that integration of signal transmission is realized.
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| CN110753111B (en) * | 2019-10-23 | 2022-02-11 | 中国核动力研究设计院 | Information sharing system of reactor physical start test equipment |
| CN111554418B (en) * | 2020-05-18 | 2022-04-29 | 中国核动力研究设计院 | Nuclear reactor extrapolation method |
| CN111917387B (en) * | 2020-08-13 | 2022-05-20 | 中国核动力研究设计院 | High-speed acquisition system for neutron detector signals |
| CN112382424A (en) * | 2020-11-10 | 2021-02-19 | 中国核动力研究设计院 | Monitoring device under low neutron fluence rate and data processing method thereof |
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