阅读说明：本技术 核电厂堆芯核仪表系统 (Nuclear power plant's reactor core Nuclear Instrument system ) 是由 陈杰 张瑜 张亮亮 丁丁 雷晴 江辉 史觊 刘东波 陈冬雷 黄勇成 于 2019-08-05 设计创作，主要内容包括：本发明公开了一种核电厂堆芯核仪表系统,其包括探测器、信号调理机柜及数字化处理与显示设备,探测器整体固定安装在堆芯内,信号调理机柜设置在安全壳内,探测器、信号调理机柜及数字化处理与显示设备依次连接；所述探测器包括多个等差中子自给能探测器,每一等差中子自给能探测器均包括多段独立的子探测器,子探测器的长度等差递减。与现有技术相比,本发明采用等差中子自给能探测器,探测器不需要驱动和选择装置驱动探测器插入堆芯,也不需外部供电,可实时在线测量堆芯三维中子注量率；采用数字化处理与显示设备使系统具有较强的计算和图形显示能力,能够实时处理测得的数据并在线生成堆芯三维功率分布图。(The invention discloses a kind of nuclear power plant's reactor core Nuclear Instrument systems, it includes detector, signal condition cabinet and digitized processing and display equipment, detector is integrally fixedly mounted on heap in-core, signal condition cabinet is arranged in containment, and detector, signal condition cabinet and digitized processing are sequentially connected with display equipment；The detector includes multiple equal difference neutron self-powered detectors, and each equal difference neutron self-powered detector includes the independent sub- detector of multistage, and the length equal difference of sub- detector is successively decreased.Compared with prior art, the present invention uses equal difference neutron self-powered detector, and detector does not need driving and selection device driving detector insertion reactor core, is not required to external power supply yet, can real-time online measuring reactor core three-dimensional neutron fluence rate；Make system that there is stronger calculating and graphics display capability using digitized processing and display equipment, the data measured can be handled in real time and generates reactor core three-dimensional power profile online.)

1. a kind of nuclear power plant's reactor core Nuclear Instrument system, it is characterised in that: including detector, signal condition cabinet and digitized processing With display equipment, detector is integrally fixedly mounted on heap in-core, and signal condition cabinet is arranged in containment, detector, signal Regulating rack and digitized processing are sequentially connected with display equipment；The detector includes that multiple equal difference neutron self-sufficiencies can detect Device, each equal difference neutron self-powered detector include the independent sub- detector of multistage, and the length equal difference of sub- detector is successively decreased.

2. nuclear power plant's reactor core Nuclear Instrument system according to claim 1, it is characterised in that: the equal difference neutron self-sufficiency can be visited The detector emitter for surveying device is made of the rhodium material that neutron absorption cross-section is big, the response time is short.

3. nuclear power plant's reactor core Nuclear Instrument system according to claim 1, it is characterised in that: each equal difference neutron is self-supporting The quantity and length of energy detector neutron detector are adjusted according to reactor core size and point position.

4. nuclear power plant's reactor core Nuclear Instrument system according to claim 1, it is characterised in that: the detector is divided into redundancy and matches Two groups of A, B set, equal difference neutron self-powered detector in two groups of detectors are arranged for interval in the horizontal and vertical of reactor core, Ensure that every group of detector can independently realize complete monitoring function.

5. nuclear power plant's reactor core Nuclear Instrument system according to claim 4, it is characterised in that: the signal condition cabinet passes through Detector cables are connect with detector, and signal condition cabinet has two groups of A, B of redundant configuration, receive A group detector and B group respectively The signal of detector.

6. nuclear power plant's reactor core Nuclear Instrument system according to claim 5, it is characterised in that: set in every group of signal condition cabinet There is the processor of two redundancies, two processors can handle all signals of A group or B group detector.

7. nuclear power plant's reactor core Nuclear Instrument system according to claim 5, it is characterised in that: the digitized processing and display Equipment is arranged outside containment, and is connect by optical fiber with signal condition cabinet.

8. nuclear power plant's reactor core Nuclear Instrument system according to claim 7, it is characterised in that: the digitized processing and display Equipment includes digitized signal processing cabinet sum number word instrument control display, and digitized signal handles cabinet and passes through optical fiber and safety Signal condition cabinet in shell is attached and communicates, and digitlization instrument control display is connected with digitlization signal processing cabinet.

9. nuclear power plant's reactor core Nuclear Instrument system according to claim 8, it is characterised in that: the optical fiber is divided into redundant configuration Two groups of A, B.

10. nuclear power plant's reactor core Nuclear Instrument system according to claim 9, it is characterised in that: the digitized signal processing Cabinet is divided into two groups of A, B of redundant configuration, and every group of digitized signal processing cabinet can receive two groups of signal condition cabinets of A, B Data, and take 2 to meet logic using 4, the automatic Reactor trip signal of reactor is generated, reactor emergency shut-down is triggered.

11. nuclear power plant's reactor core Nuclear Instrument system according to claim 10, it is characterised in that: the automatic shutdown of reactor Protecting signal is DNBR high RST or FLP high RST.

12. nuclear power plant's reactor core Nuclear Instrument system according to claim 8, it is characterised in that: the digitized signal processing Cabinet generates the optimal recommendation calculating of reactor core three-dimensional power profile, reactor core parameter and reactor protection function logic fortune online It calculates.

13. nuclear power plant's reactor core Nuclear Instrument system according to claim 12, it is characterised in that: the digitlization instrument control is shown Device is used for Real time displaying reactor core three-dimensional power profile, reactor core monitoring of working condition and alarm screen, the optimal recommendation of reactor core parameter.

14. nuclear power plant's reactor core Nuclear Instrument system according to claim 1, it is characterised in that: the equal difference neutron self-sufficiency energy Detector voluntarily generates electric current in radiation field, and the size of electric current and variation reflect the characteristic and variation of radiation field.

15. nuclear power plant's reactor core Nuclear Instrument system according to claim 14, it is characterised in that: the signal condition cabinet is used In the neutron fluence rate signal that acquisition equal difference neutron self-powered detector generates, signal amplification, filtering and by current signal are carried out It is converted into fiber-optic signal.

Technical field

The invention belongs to nuclear power plant's operational monitoring fields, it is more particularly related to a kind of nuclear power plant's heap core instrument Table system.

Background technique

Nuclear power plant's reactor core Nuclear Instrument system generates three-dimensional heap core power profile by measurement reactor core neutron fluence rate； Using the data measured, the automatic Reactor trip of reactor and operation optimum control may be implemented, check ONIS (out-pile Nuclear Instrument system System, Outside Nuclear Instrumentation System) power range channel, assessment reactor fuel component burnup, To guarantee the integrality and maintenance reactor core safety of fuel can.

Disclosing nuclear power plant's in-core instrumentation system mostly is the technical solution for relying on simulation instrument control technology and being formed, and has knot The disadvantages of structure is complicated, data processing amount is small, visual difference, and be all regular off-line measurement three-dimensional heap core power distribution, it cannot Real-time measurement, processing and display heap core power distribution situation, can not realize the automatic Reactor trip function of reactor.

Referring to Fig. 1, a kind of published nuclear power plant's in-core instrumentation system is mainly by moving miniature fission chamber 10, driving With selection device 12, control and monitor cabinet 14, signal processing and 16 4 part of display device composition.Wherein, moving miniature Fission chamber 10 is arranged in containment 20, and driving and selection device 12 control and monitor cabinet 14, signal processing and display device 16 are arranged outside containment 20.The detector that moving miniature fission chamber 10 uses is mobile fission detector, detector end Portion is connect by driving and conductive dual-purpose spiral cable 120 with driving and selection device 12, and driving and selection device are passed through Detector is inserted into reactor core by 12, and driving and selection device 12 can only select every time and a detector driven to measure.Control It is used to control driving and selection device 12, the state for monitoring Measurement channel 100 and mechanical device with monitoring cabinet 14.When measurement, Detector is during heap in-core is mobile, signal processing and the neutron fluence that display device 16 receives and storage detector issues Rate signal, processed offline and drafting reactor core neutron flux rate distribution figure.Above-mentioned reactor core Nuclear Instrument system operates intermittently, at least Every 30 equivalent full power days enable once, and a complete reactor core fluence rate measurement job is about 2 hours time-consuming.

Above-mentioned reactor core Nuclear Instrument system at least has the disadvantage in that 1) movement in reactor core of mobile fission detector needs outer Portion's power supply and the motor driven for passing through driving and selection device 12, system structure is complicated, and working link is more；2) mobile fission is visited Survey the device same time can only simple detector work, a complete reactor core fluence rate measurement job is time-consuming more, and cannot online in fact When measure, the automatic Reactor trip signal of reactor cannot be generated；3) hardwired communication volume of transmitted data is small, signal anti-attenuation and anti- Jamming performance is poor, and needs to carry out signal transmission and multiple containment penetrations 200 using a large amount of cables；4) it cannot handle in real time With transmission reactor core three-dimensional power signal, not can display real-time reactor core three-dimensional power profile, cannot online secondary treatment, Wu Fashi The problem of existing reactor operation optimum control and reactor automatic shutdown；5) detector or driving and 12 failure of selection device need It re-replaces detector and selects spare driving and selection device 12, working link is more；6) system non-redundant is arranged, and is unsatisfactory for Reactor protection has a single function failure principle.

With the development of nuclear power and digitlization instrument control technology, to the simple structure of reactor core Nuclear Instrument system, high-performance, height Reliability, reactor protection function are realized, on-line monitoring and graph visualization are proposed and required higher.In view of this, truly having Necessity provides a kind of nuclear power plant's reactor core Nuclear Instrument system for being able to solve the above problem.

Summary of the invention

It is an object of the invention to: provide a kind of structure it is simple, without external drive and can be realized On-line sampling system, Nuclear power plant's reactor core Nuclear Instrument system of processing and display.

In order to achieve the above-mentioned object of the invention, the present invention provides a kind of nuclear power plant's reactor core Nuclear Instrument systems comprising detection Device, signal condition cabinet and digitized processing and display equipment, detector are integrally fixedly mounted on heap in-core, signal condition cabinet It is arranged in containment, detector, signal condition cabinet and digitized processing are sequentially connected with display equipment；The detector packet Multiple equal difference neutron self-powered detectors are included, each equal difference neutron self-powered detector includes the independent sub- detector of multistage, The length equal difference of sub- detector is successively decreased.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the spy of the equal difference neutron self-powered detector Device emitter is surveyed to be made of the rhodium material that neutron absorption cross-section is big, the response time is short.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, each equal difference neutron self-powered detector The quantity and length of neutron detector are adjusted according to reactor core size and point position.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the detector is divided into A, B of redundant configuration Two groups, equal difference neutron self-powered detector in two groups of detectors is arranged for interval in the horizontal and vertical of reactor core, it is ensured that every Group detector can independently realize complete monitoring function.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the signal condition cabinet passes through detector electricity Cable is connect with detector, and signal condition cabinet has two groups of A, B of redundant configuration, receives A group detector and B group detector respectively Signal.

It is superfluous equipped with two in every group of signal condition cabinet as a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention Remaining processor, two processors can handle all signals of A group or B group detector.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the digitized processing and display equipment setting It is connect outside containment, and through optical fiber with signal condition cabinet.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the digitized processing includes with display equipment Digitized signal handles cabinet sum number word instrument control display, and digitized signal handles cabinet and passes through the letter in optical fiber and containment Number regulating rack is attached and communicates, and digitlization instrument control display and digitizes signal processing cabinet and connects.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the optical fiber is divided into A, B two of redundant configuration Group.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the digitized signal processing cabinet is divided into superfluous Two groups of A, B of remaining configuration, every group of digitized signal processing cabinet can receive the data of two groups of signal condition cabinets of A, B, and adopt It takes 2 to meet logic with 4, generates the automatic Reactor trip signal of reactor, trigger reactor emergency shut-down.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the automatic Reactor trip signal of reactor is DNBR high RST or FLP high RST.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the digitized signal processing cabinet is given birth to online At reactor core three-dimensional power profile, the optimal recommendation of reactor core parameter calculates and reactor protection function logic operation.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the digitlization instrument control display is for online Show reactor core three-dimensional power profile, reactor core monitoring of working condition and alarm screen, the optimal recommendation of reactor core parameter.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the equal difference neutron self-powered detector is in spoke It penetrates and voluntarily generates electric current in field, the size of electric current and variation reflect the characteristic and variation of radiation field.

As a kind of improvement of nuclear power plant's reactor core Nuclear Instrument system of the present invention, the signal condition cabinet is for acquiring equal difference The neutron fluence rate signal that neutron self-powered detector generates carries out signal amplification, filters and convert optical fiber for current signal Signal.

Compared with prior art, nuclear power plant's reactor core Nuclear Instrument system of the present invention has at least the following advantages:

1) equal difference neutron self-powered detector is used, detector is fixedly mounted on heap in-core and can voluntarily generate electric current, Driving and selection device driving detector insertion reactor core are not needed, external power supply is also not required to, so that system cabinet structure is simplified, work It is few to make process；

2) equal difference neutron self-powered detector is used, detector is integrally fixedly mounted on heap in-core, can on-line measurement simultaneously Reactor core three-dimensional neutron fluence rate signal, detector emitter are made of rhodium material, and signal response time is fast, it can be achieved that real-time response Measurand variation, be used for reactor protection function, solve mobile fission detector can only simple detector work, one is complete Whole reactor core fluence rate measurement work is time-consuming more and the problem of being unable to On-line sampling system；

3) fiber optic communication mode is used, the transmission of fiber optic communication data is big, no signal decays, Flouride-resistani acid phesphatase interference performance is strong, because This improves system data transmission and anti-interference ability, and reduces the usage quantity of system cable and containment penetration, solution Hardwired communication volume of transmitted data of having determined is small, and signal anti-attenuation and interference free performance are poor, and needs to carry out letter using a large amount of cables Number transmission and the problem of multiple containment penetrations；

4) using digitized processing and display equipment, make system that there is stronger calculating and graphics display capability, Neng Goushi When the data that measure of processing and generate reactor core three-dimensional power profile online, realization reactor automatic protection, reactor operation are most Excellent control and reactor core three-dimensional power profile Real time displaying；

5) each equal difference neutron self-powered detector is made of the independent sub- detector of multistage, the quantity and height of sub- detector Degree can be customized according to differential responses heap, and a certain cross-talk breakdown detector influences not neutron fluence rate signal measurement quality Greatly, it does not need to re-replace sub- detector, system is easy to maintain；

6) detector, signal condition cabinet, optical fiber, digitized signal processing cabinet are all made of Redundancy Design, wherein each Signal condition cabinet contains the processor of two redundancies, and every processor can transmit signals to digitized signal processor Cabinet, digitized signal processing cabinet then use 4 to take 2 to meet logic and generate the automatic shutdown signal of reactor, it is ensured that individual equipment It is unavailable that failure not will lead to system.

Detailed description of the invention

With reference to the accompanying drawings and detailed description, nuclear power plant's reactor core Nuclear Instrument system of the present invention is described in detail.

Fig. 1 is the structural schematic diagram for disclosing nuclear power plant's reactor core Nuclear Instrument system.

Fig. 2 is the structural schematic diagram of nuclear power plant's reactor core Nuclear Instrument system of the present invention.

Fig. 3 is the structural representation of the single equal difference neutron self-powered detector of nuclear power plant's reactor core Nuclear Instrument system of the present invention Figure.

Fig. 4 is distribution map of the two groups of detectors of A, B of nuclear power plant's reactor core Nuclear Instrument system of the present invention in reactor core.

Specific embodiment

In order to be more clear goal of the invention of the invention, technical solution and its advantageous effects, below in conjunction with attached drawing And specific embodiment, the present invention will be described in further detail.It is emphasized that specific reality described in this specification Mode is applied just for the sake of explaining the present invention, is not intended to limit use occasion of the invention.

Referring to Fig. 2, nuclear power plant's reactor core Nuclear Instrument system of the present invention includes sequentially connected detector 30, signal condition machine Cabinet 32, optical fiber 34, digitized processing and display equipment.Detector 30 and signal condition cabinet 32 are arranged in containment 20, number Wordization processing is arranged outside containment with display equipment, and is connect by optical fiber 34 with signal condition cabinet 32.

The detector 30 includes multiple equal difference neutron self-powered detectors, and electric current can be voluntarily generated in radiation field, The size of electric current and variation reflect the characteristic and variation of radiation field.The present invention integrally fixes equal difference neutron self-powered detector Be mounted in reactor core, can real-time monitoring reactor core neutron fluence rate, and system operation in do not need external driver device driving visit It surveys device and is inserted into reactor core, so that system cabinet structure is simplified, workflow is few.

Referring to Fig. 3, each equal difference neutron self-powered detector includes the independent sub- detector 300 of multistage, sub- detection The length equal difference of device 300 is successively decreased, and the quantity and length of sub- detector 300 can be adjusted according to reactor core size and point position, Therefore single sub- 300 failure of detector influences the measurement of reactor core three-dimensional neutron fluence rate smaller.

The detector emitter of equal difference neutron self-powered detector used in the present invention is made of rhodium material, to thermal neutron Absorption cross-section is big, and the response time is small, by delay response compensation, it can be achieved that real-time response measurand changes, is used for reactor Defencive function.

Referring to Fig. 4, it is two groups of A, B of redundant configuration that detector 30 of the invention, which is divided to, the equal difference in two groups of detectors 30 Neutron self-powered detector is arranged for interval in the horizontal and vertical of reactor core, it is ensured that every group of detector 30 can be realized independently Complete monitoring function.Two groups of 30 redundant arrangements of detector are in reactor core, it can be ensured that when any group of detector 30 breaks down When, reactor core Nuclear Instrument system still can be used.

Referring to Fig. 2, signal condition cabinet 32 is arranged in containment 20, pass through detector cables 31 and detector 30 Connection, for acquire equal difference neutron self-powered detector generation neutron fluence rate signal, carry out signal amplification, filtering and will be electric Stream signal is converted into fiber-optic signal.Signal condition cabinet 32 has two groups of A, B of redundant configuration, receives A group detector and B group respectively The signal of detector.The processor of two redundancies is equipped in every group of signal condition cabinet 32, two processors can handle A group Or all signals of B group detector 30, therefore, any group of signal condition cabinet 32 break down will not result in system can not With.

Digitized processing and display equipment are arranged outside containment 20 comprising digitized signal handles cabinet 36 and number Change instrument control display 38.

Digitized signal processing cabinet 36 be attached by the signal condition cabinet 32 in optical fiber 34 and containment 20 and Communication, the transmission of fiber optic communication data is big, no signal decays, Flouride-resistani acid phesphatase interference performance is strong, and can reduce system cable and containment The usage quantity of penetration piece 200.It is two groups of A, B of redundant configuration that optical fiber 34 of the invention, which is divided to, and any group of 34 failure of optical fiber is not It is unavailable to will lead to system.

Digitized signal processing cabinet 36 can handle the operation of mass data, can generate the distribution of reactor core three-dimensional power online The optimal recommendation of figure, reactor core parameter calculates and reactor protection function logic operation.Digitized signal of the invention handles cabinet 36 points are two groups of A, B of redundant configuration, and every group of cabinet can receive the data of two groups of signal condition cabinets 32 of A, B, and take using 4 2 meet logic, generate DNBR (departure from nucleate boiling ratio, Departure From Nucleate Boiling Ratio) it is high and The automatic Reactor trip signals of reactors such as FLP high (fuel element linear heat generation rate, Fuel Line Power), triggering reactor are urgent Reactor safety is protected in shutdown.As it can be seen that will not result in system unavailable for any group of digitized signal processing 36 failure of cabinet.

It digitizes instrument control display 38 and digitlization signal processing cabinet 36 connects, be used for Real time displaying reactor core three-dimensional power Distribution map, reactor core monitoring of working condition and alarm screen, the optimal recommendation of reactor core parameter etc..

Compared with prior art, nuclear power plant's reactor core Nuclear Instrument system of the present invention has at least the following advantages:

1) equal difference neutron self-powered detector is used, detector 30 is fixedly mounted on heap in-core and can voluntarily generate electricity Stream does not need driving and selection device driving detector insertion reactor core, is not required to external power supply yet, so that system cabinet structure letter Change, workflow are few；

2) equal difference neutron self-powered detector is used, detector 30 is whole to be fixedly mounted on heap in-core, can survey online simultaneously Reactor core three-dimensional neutron fluence rate signal is measured, detector emitter is made of rhodium material, and signal response time is fast, it can be achieved that ringing in real time Answer measurand to change, be used for reactor protection function, solve mobile fission detector can only simple detector work, one Complete reactor core fluence rate measurement work is time-consuming more and the problem of being unable to On-line sampling system；

3) fiber optic communication mode is used, the transmission of fiber optic communication data is big, no signal decays, Flouride-resistani acid phesphatase interference performance is strong, because This improves system data transmission and anti-interference ability, and reduces the usage quantity of system cable and containment penetration 200, It is small to solve hardwired communication volume of transmitted data, signal anti-attenuation and interference free performance are poor, and need to carry out using a large amount of cables The problem of signal transmission and multiple containment penetrations；

4) using digitized processing and display equipment, make system that there is stronger calculating and graphics display capability, Neng Goushi When the data that measure of processing and generate reactor core three-dimensional power profile online, realization reactor automatic protection, reactor operation are most Excellent control and reactor core three-dimensional power profile Real time displaying；

5) each equal difference neutron self-powered detector is made of the independent sub- detector 300 of multistage, the number of sub- detector 300 Amount and height can be customized according to differential responses heap, and a certain 300 failure of cross-talk detector is to neutron fluence rate signal measurement matter Amount influences less, not needing to re-replace sub- detector, system is easy to maintain；

6) detector 30, signal condition cabinet 32, optical fiber 34, digitized signal processing cabinet 36 are all made of Redundancy Design, Wherein each processor of the signal condition cabinet 32 containing two redundancies, every processor can transmit signals to digitlization letter Number processing cabinet 36, digitized signal processing cabinet 36 then using 4 take 2 meet logic generate the automatic shutdown signal of reactor, really It is unavailable that the failure of guarantor's individual equipment not will lead to system.

According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party Formula carries out change and modification appropriate.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to this Some modifications and changes of invention should also be as falling into the scope of the claims of the present invention.In addition, although this specification In use some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.