CN208570129U - A kind of digitlization Nuclear Instrument RPN system - Google Patents
A kind of digitlization Nuclear Instrument RPN system Download PDFInfo
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- CN208570129U CN208570129U CN201821009633.9U CN201821009633U CN208570129U CN 208570129 U CN208570129 U CN 208570129U CN 201821009633 U CN201821009633 U CN 201821009633U CN 208570129 U CN208570129 U CN 208570129U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The utility model is suitable for the technical field of reactor Control and protection system, provides a kind of digitlization Nuclear Instrument RPN system, comprising: neutron detector, protection cabinets and control cabinet；The neutron detector measures neutron flux signal, and the neutron flux signal is sent to protection cabinets, and the protection cabinets are sent to control cabinet after carrying out digitlization adjustment, processing to received neutron flux signal.It is overcome by the utility model and is difficult to thoroughly solve the problems, such as system aging based on simulation plate replacement equipment component in the prior art, meet the demand that nuclear power system solves site problems.
Description
Technical field
The utility model belong to reactor control and protection technical field more particularly to a kind of digitlization Nuclear Instrument RPN
System.
Background technique
Control cabinet RPN001~005AR of traditional nuclear power station RPN system is the equipment based on simulation plate technology,
Reach certain service life, needs to perform corresponding processing the aging of plate；At present due to based on simulation plate technology
Spares provisioning amount gradually decreases, and purchase cost also gradually rises, and existing simulation plate technology is also unable to satisfy nuclear power system
System solves the demand of site problems and the demand of interface；It is difficult to thoroughly based on traditional simulation plate technology replacement equipment component
Solve the problems, such as system aging and backward in technique.
Utility model content
In view of this, the utility model embodiment provides a kind of digitlization Nuclear Instrument system, to solve in the prior art
Simulation plate technology replacement equipment component is difficult to thoroughly solve the problems, such as system aging and backward in technique.
The utility model embodiment provides a kind of digitlization Nuclear Instrument RPN system, comprising: neutron detector, protection cabinets
And control cabinet；The neutron detector measures neutron flux signal, and the neutron flux signal is sent to protection cabinets, described
Protection cabinets are sent to control cabinet after carrying out digitlization adjustment, processing to received neutron flux signal；
The neutron detector includes: 2 source range detectors, 2 intermediate range detectors and 4 power range detections
Device；The protection cabinets include: the first protection cabinets, the second protection cabinets, third protection cabinets, the 4th protection cabinets；
2 sources range detector is connect with the first protection cabinets and the second protection cabinets respectively；
Described 2 intermediate range detectors are connect with the first protection cabinets and the second protection cabinets respectively；
4 power ranges detector respectively with the first protection cabinets, the second protection cabinets, third protection cabinets, the 4th
Protection cabinets connection；
The protection cabinets are connect with the control cabinet.
Existing beneficial effect is the utility model embodiment compared with prior art: by the utility model embodiment 2
A source range detector is connect with first the second protection cabinets of protection cabinets respectively, and 2 intermediate range detectors are protected with first respectively
Cabinet and the connection of the second protection cabinets, 4 intermediate range detectors respectively with the first protection cabinets, the second protection cabinets, third protection cabinets, the
The connection of four protection cabinets can carry out mutually independent monitoring and control to the signal of different range detectors output respectively；Control
Cabinet can make control cabinet carry out number to parameter, the operating status in the corresponding range channel of each protection cabinets with the connection of protection cabinets
Change monitoring and display, without operation in RPN system protection cabinet, saves parameter and provide the time, improve working efficiency, meet nuclear power
System solves the demand of site problems, has reached the convenience of the implementation of RPN system for field and RPN system maintenance.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of digitlization Nuclear Instrument RPN system provided by the embodiment of the utility model；
Fig. 2 is the first protection cabinets RPN001AR schematic diagram provided by the embodiment of the utility model
Fig. 3 is the second protection cabinets RPN002AR schematic diagram provided by the embodiment of the utility model；
Fig. 4 is the schematic diagram of third protection cabinets RPN003AR provided by the embodiment of the utility model；
Fig. 5 is the schematic diagram of the 4th protection cabinets RPN004AR provided by the embodiment of the utility model；
Fig. 6 is the schematic diagram of control cabinet RPN005AR provided by the embodiment of the utility model.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the utility model embodiment.However, it will be clear to one skilled in the art that there is no these
The utility model also may be implemented in the other embodiments of detail.In other situations, omit to well-known system,
The detailed description of device, circuit, in case unnecessary details interferes the description of the utility model.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " instruction is described special
Sign, entirety, step, operation, the presence of element and/or component, but be not precluded one or more of the other feature, entirety, step,
Operation, the presence or addition of element, component and/or its set.
It is also understood that in this utility model term used in the description merely for the sake of description specific embodiment
Purpose and be not intended to limit the utility model.As used in the utility model specification and appended book
Like that, other situations unless the context is clearly specified, otherwise " one " of singular, "one" and "the" are intended to include plural number
Form.
It will be further appreciated that the term used in the utility model specification and appended book " and/
Or " refer to any combination and all possible combinations of one or more of associated item listed, and including these groups
It closes.
In order to illustrate technical solution described in the utility model, the following is a description of specific embodiments.
It is the schematic diagram of digitlization Nuclear Instrument RPN system provided by the embodiment of the utility model referring to Fig. 1, for the ease of
Illustrate, illustrates only part relevant to the utility model embodiment.
The digitlization Nuclear Instrument RPN system, comprising: neutron detector, protection cabinets and control cabinet；Neutron detector is surveyed
Neutron flux signal is obtained, and neutron flux signal is sent to protection cabinets, protection cabinets count received neutron flux signal
To control cabinet after wordization adjustment, processing；
Neutron detector includes: 2 source range detectors, 2 intermediate range detectors and 4 power range detectors；
Protection cabinets include: the first protection cabinets RPN001AR, the second protection cabinets RPN002AR, third protection cabinets RPN003AR, the 4th protection
Cabinet RPN004AR；
2 source range detectors are respectively RPN014MA detector and RPN024MA detector；2 intermediate range detectors
People is not RPN013MA detector and RPN023MA detector；4 power range detectors be respectively RPN010MA detector,
RPN020MA detector, RPN030MA detector and RPN040MA detector.
2 sources range detector is connect with the first protection cabinets RPN001AR and the second protection cabinets RPN002AR respectively；
Described 2 intermediate range detectors connect with the first protection cabinets RPN001AR and the second protection cabinets RPN002AR respectively
It connects；
4 power ranges detector respectively with the first protection cabinets RPN001AR, the second protection cabinets RPN002AR,
Third protection cabinets RPN003AR, the 4th protection cabinets RPN004AR connection；
The protection cabinets are connect with control cabinet.
First protection cabinets RPN001AR and the second protection cabinets RPN002AR are identical, include source range, intermediate range, quantity of power
3 Measurement channels of journey；Third protection cabinets RPN003AR and the 4th protection cabinets RPN004AR are identical, only logical comprising the measurement of power range
Road.
Wherein, neutron detector is located in detector duct axially mounted outside reactor pressure vessel, neutron detector
The neutron flux signal measured is transmitted to protection cabinets by detector cables；Protection cabinets provide high pressure for neutron detector, and locate
The neutron flux signal that neutron detector is sent is managed, after carrying out digitlization conditioning and processing to neutron flux signal, carries out core function
The calculating of rate, the calculating of doubling time and calculating of Reactor trip threshold value etc.；Neutron flux signal by digitized processing
And calculate core power, doubling time and Reactor trip threshold packet transmission to control cabinet, by control cabinet according to the letter received
Number send the analog quantity indication signal and switching value alarm signal of relay rack etc. of master control.
Protection cabinets RPN001-004AR exports shutdown on-off model to trip protection system RPR, output simulation monitoring letter
Number to centralized control analog quantity cabinet KRG；By treated, signal is sent to control cabinet to protection cabinets RPN001-004AR；Control cabinet
To rod control system RGL relay, control cabinet is exported for monitoring stick control signal or power signal of the output for controlling and alarming
Analog signal to Nuclear Instrument system RPN relay rack, monitoring signal or alarm signal are exported to intensive data by relay rack
Processing system KIT or alarm processing system KSA, control cabinet export average power signal, current signal, range stimulus, event
Hinder signal to margin monitoring system LSS, recorder, signal range and indicates ID table, loose part vibration monitor system KIR.
Each range channel in each protection cabinets is provided by independent simulation fastener module composition for neutron detector
While high pressure, the signal of processing detector submitting and the conditioning for executing signal calculate core power, doubling time in real time and stop
Heap protects threshold value, monitors the aging conditions of RPN system parameter and RPN system.
Optionally, the digitlization Nuclear Instrument RPN system further include: mobile off-line testing cabinet MTE and portable notes
For being adjusted to RPN system parameter, the movable type off-line testing cabinet MTE is used by this LDU, the portable notebook LDU
It modifies in RPN system parameter.The model RPN700HV of mobile off-line testing cabinet MTE.Pass through mobile offline examination
It tests cabinet MTE and plateau characteristic test is carried out to neutron detector, routine test, high pressure and discriminating threshold are carried out to each range channel and set
It sets, modify and the drafting of horizontal curve；And each channel parameters and system definite value are repaired by portable notebook LDU
Change, and when range channel is broken down, fault type and details is checked, so that discharge coefficient demarcation flow, is not necessarily to
Data are manually read and typing, improve work efficiency and unit output ability.
It referring to fig. 2, is the first protection cabinets RPN001AR schematic diagram provided by the embodiment of the utility model, for the ease of
Illustrate, illustrates only part relevant to the utility model embodiment.
First protection cabinets RPN001AR includes: the first cabinet alarm lamp 1211, the first power range channel 1212, and
One intermediate range channel 1213, the first source range channel 1214, the first operation panel 1215 and the first cabinet power case
1216；
By taking the first operation panel 1215 of the first protection cabinets RPN001AR as an example, operation panel includes: reset key, quantity of power
Journey channel selecting key, intermediate range channel selecting key, source range channel selecting key, power range feeler switch, intermediate range test
Key, source range feeler switch, power range lane testing indicator light, intermediate range lane testing indicator light, source range lane testing
Indicator light, network communication interface, power check key, signal frequency split switching key etc..
It is the second protection cabinets RPN002AR schematic diagram provided by the embodiment of the utility model referring to Fig. 3, for the ease of
Illustrate, illustrates only part relevant to the utility model embodiment.
The second protection cabinets RPN002AR includes: the second cabinet alarm lamp 1221, the second power range channel
1222, the second intermediate range channel 1223, the second source range channel 1224, the second operation panel 1225 and the second cabinet power supply
Cabinet 1226.
It referring to fig. 4, is the third protection cabinets RPN003AR schematic diagram provided by the embodiment of the utility model, for the ease of
Illustrate, illustrates only part relevant to the utility model embodiment.
The third protection cabinets RPN003AR includes: third cabinet alarm lamp 1231, third power range channel
1232, third operation panel 1233 and third cabinet power case 1234.
It is the 4th protection cabinets RPN004AR schematic diagram provided by the embodiment of the utility model referring to Fig. 5, for the ease of
Illustrate, illustrates only part relevant to the utility model embodiment.
The 4th protection cabinets RPN004AR includes: the 4th cabinet alarm lamp 1241, the 4th power range channel
1242, the 4th operation panel 1243 and the 4th cabinet power case 1244.
It is the control cabinet RPN005AR schematic diagram provided by the embodiment of the utility model, for the ease of saying referring to Fig. 6
It is bright, illustrate only part relevant to the utility model embodiment.
Control cabinet is control cabinet RPN005AR, and control cabinet RPN005AR includes: processing rack 1301, industrial personal computer 1302, people
Machine interface HMI display interface 1303 and cabinet power case 1304.
The processing rack 1301 of control cabinet RPN005AR obtains the signal that protection cabinets are sent by the network equipment, by processing
Analog signals, Yi Jigong that the on-off model with control function, high pressure loss alarm signal, ID table are shown are sent out afterwards
Rate range maximum average power signal etc..
Industrial personal computer 1302 obtains the signal that protection cabinets are sent by the network equipment, and real-time monitoring simultaneously shows each amount of protection cabinets
The operation shape of procedure parameter, operating status, set threshold value, threshold triggers state and the control cabinet RPN005AR of Cheng Tongdao itself
State, and log and alert event are provided etc..
The cabinet door of each protection cabinets is the split mode in front and back, backboard open frame is used inside protection cabinets, by signal condition
The processing plate that circuit and signal processing circuit are constituted with before and after cabinet to being inserted into backboard open frame；Each range channel is individually set
It sets in the rack of 19 cun of 6U；It is additionally provided with interface plate on rear side of protection cabinets, is used for cable termination and internal signal wiring.
Through this embodiment, each protection protection cabinets are provided with for different range treatment channels and operation panel,
Control cabinet is provided with processing rack, industrial personal computer, man-machine interface HMI display interface, and the power level to reactor, function may be implemented
Rate variation, the axial monitoring being distributed and system parameter variations situation is real-time continuous of power；And it is found by display interface anti-
When answering heap exception, the signal that neutron fluence rate is high or neutron fluence rate change rate is high is sent to reactor protection system in time, from
And trigger reactor emergency shut-down, meet nuclear power system solve site problems demand, make RPN system for field implement and
RPN system maintenance is more convenient.
The power range channel of each protection cabinets, intermediate range channel, source range channel respectively include signal condition electricity
Road and signal processing circuit, signal conditioning circuit receive the neutron flux signal of neutron detector, and neutron flux signal is by letter
Signal processing circuit is sent to after the conditioning of number conditioning circuit.Signal conditioning circuit executes the amplification of detector signal, is shaped as marking
Calibration signal carries out power calculation by signal processing circuit, the doubling time calculates, protects by isolation output to signal processing circuit
Shield and control alarm threshold value calculate and are output to downstream interface system.In addition, signal processing circuit uses digitized processing, to plate
Part failure diagnosed automatically, channel self-test, channel period test, system parameter settings, and by network to control cabinet list
To transmission signal.
Optionally, Nuclear Instrument RPN system is digitized further include: recorder and signal range dial gauge；The wherein record
The 12 stroke numeral formula recording instrument without paper of model DX1012N type of instrument, the model RPN403- of the signal range dial gauge
409ID1 and RPN403-409ID2.Wherein, signal range dial gauge RPN403-409ID1 can receive 0 to -10V signal.
The digitlization Nuclear Instrument RPN system further includes switching value or analog signals interface；Wherein, security-related
On-off model and the analog signals of important near-sighted function directly transmitted out by protection cabinets RPN001-004AR hardwire；
On-off model and insignificant analog signals about control and alarm complete signal by protection cabinets RPN001-004AR
Control cabinet RPN005AR is sent to by network after calculating, is sent to interface equipment after being handled by control cabinet RPN005AR.
The digitlization Nuclear Instrument RPN system further includes cabinet power supply interface, is respectively as follows: protection cabinets RPN001-004AR
Upstream power supply interface and the upstream control cabinet RPN005AR power supply interface；The switch of the upstream protection cabinets RPN001-004AR power supply interface
Capacity is D10A, and the contact capacity of the upstream control cabinet RPN005AR power supply interface is D16A.
The digitlization Nuclear Instrument RPN system further includes grounding apparatus interface, and protection cabinets and control cabinet are set as a whole
An external ground terminal is set, and ground connection is connected on the live dedicated grounding copper bar of RPN system detector cable testing bridge.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit the utility model.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.
In embodiment provided by the utility model, it should be understood that disclosed device/terminal device, Ke Yitong
Other modes are crossed to realize.For example, device described above/terminal device embodiment is only schematical, for example, described
The division of module or unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as more
A unit or assembly can be combined or can be integrated into another system, or some features can be ignored or not executed.It is another
Point, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device or
The INDIRECT COUPLING or communication connection of unit can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the utility model can integrate in one processing unit,
It can be each unit to physically exist alone, can also be integrated in one unit with two or more units.It is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.
Embodiment described above is only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to before
Embodiment is stated the utility model is described in detail, those skilled in the art should understand that: it still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And
These are modified or replaceed, the spirit for various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
And range, it should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of digitlization Nuclear Instrument RPN system characterized by comprising neutron detector, protection cabinets and control cabinet；It is described
Neutron detector measures neutron flux signal, and the neutron flux signal is sent to protection cabinets, and the protection cabinets are to reception
Neutron flux signal carry out digitlization adjustment, processing after be sent to control cabinet；
The neutron detector includes: 2 source range detectors, 2 intermediate range detectors and 4 power range detectors；
The protection cabinets include: the first protection cabinets, the second protection cabinets, third protection cabinets, the 4th protection cabinets；
2 sources range detector is connect with the first protection cabinets and the second protection cabinets respectively；
Described 2 intermediate range detectors are connect with the first protection cabinets and the second protection cabinets respectively；
4 power ranges detector is protected with the first protection cabinets, the second protection cabinets, third protection cabinets, the 4th respectively
Cabinet connection；
The protection cabinets are connect with the control cabinet.
2. digitlization Nuclear Instrument RPN system as described in claim 1, which is characterized in that the system also includes: it is mobile from
Thread test cabinet MTE and portable notebook LDU, the portable notebook LDU are for being adjusted RPN system parameter, institute
Mobile off-line testing cabinet MTE is stated for modifying to RPN system parameter.
3. digitlization Nuclear Instrument RPN system as described in claim 1, which is characterized in that first protection cabinets include: first
Cabinet alarm lamp, the first power range channel, the first intermediate range channel, the first source range channel, the first operation panel
And the first cabinet power case.
4. digitlization Nuclear Instrument RPN system as described in claim 1, which is characterized in that second protection cabinets include: second
Cabinet alarm lamp, the second power range channel, the second intermediate range channel, the second source range channel, the second operation panel
And the second cabinet power case.
5. digitlization Nuclear Instrument RPN system as described in claim 1, which is characterized in that the third protection cabinets include: third
Cabinet alarm lamp, third power range channel, third operation panel and third cabinet power case.
6. digitlization Nuclear Instrument RPN system as described in claim 1, which is characterized in that the 4th protection cabinets include: the 4th
Cabinet alarm lamp, the 4th power range channel, the 4th operation panel and the 4th cabinet power case.
7. digitlization Nuclear Instrument RPN system as claimed in claim 2, which is characterized in that the control cabinet includes: processor
Frame, industrial personal computer, man-machine interface HMI display interface and cabinet power case.
8. digitlization Nuclear Instrument RPN system as claimed in claim 2, which is characterized in that the movable type off-line testing cabinet MTE
Model RPN700HV.
9. digitlization Nuclear Instrument RPN system as described in claim 1, which is characterized in that the system also includes: recorder and
Signal range dial gauge；The wherein 12 stroke numeral formula recording instrument without paper of model DX1012N type of the recorder, the semaphore
The model RPN403-409ID1 and RPN403-409ID2 of journey dial gauge.
10. digitlization Nuclear Instrument RPN system as described in claim 1, which is characterized in that the system also includes switching value or
Analog signals interface, cabinet power supply interface, grounding apparatus interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821009633.9U CN208570129U (en) | 2018-06-27 | 2018-06-27 | A kind of digitlization Nuclear Instrument RPN system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821009633.9U CN208570129U (en) | 2018-06-27 | 2018-06-27 | A kind of digitlization Nuclear Instrument RPN system |
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| CN208570129U true CN208570129U (en) | 2019-03-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420229A (en) * | 2020-11-18 | 2021-02-26 | 中国核动力研究设计院 | Out-of-pile nuclear instrument system periodic test device and test method thereof |
| CN112837834A (en) * | 2020-12-31 | 2021-05-25 | 江苏核电有限公司 | Off-line inspection device and method for in-situ measurement channel performance of off-core nuclear measurement system |
| CN113270217A (en) * | 2021-05-14 | 2021-08-17 | 中国核动力研究设计院 | Power range measuring method and device of six-section uncompensated ionization chamber |
| CN113436766A (en) * | 2021-06-07 | 2021-09-24 | 中国核动力研究设计院 | Out-of-pile nuclear instrument system equipment for nuclear power plant |
-
2018
- 2018-06-27 CN CN201821009633.9U patent/CN208570129U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420229A (en) * | 2020-11-18 | 2021-02-26 | 中国核动力研究设计院 | Out-of-pile nuclear instrument system periodic test device and test method thereof |
| CN112420229B (en) * | 2020-11-18 | 2022-02-22 | 中国核动力研究设计院 | Out-of-pile nuclear instrument system periodic test device and test method thereof |
| CN112837834A (en) * | 2020-12-31 | 2021-05-25 | 江苏核电有限公司 | Off-line inspection device and method for in-situ measurement channel performance of off-core nuclear measurement system |
| CN113270217A (en) * | 2021-05-14 | 2021-08-17 | 中国核动力研究设计院 | Power range measuring method and device of six-section uncompensated ionization chamber |
| CN113436766A (en) * | 2021-06-07 | 2021-09-24 | 中国核动力研究设计院 | Out-of-pile nuclear instrument system equipment for nuclear power plant |
| CN113436766B (en) * | 2021-06-07 | 2023-05-26 | 中国核动力研究设计院 | Off-stack nuclear instrument system equipment for nuclear power plant |
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