CN209461163U - Main steam line leakage monitoring system in a kind of containment - Google Patents
Main steam line leakage monitoring system in a kind of containment Download PDFInfo
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- CN209461163U CN209461163U CN201821492176.3U CN201821492176U CN209461163U CN 209461163 U CN209461163 U CN 209461163U CN 201821492176 U CN201821492176 U CN 201821492176U CN 209461163 U CN209461163 U CN 209461163U
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- containment
- main steam
- leakage monitoring
- steam line
- monitoring system
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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
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- Examining Or Testing Airtightness (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The purpose of this utility model is that disclosing main steam line leakage monitoring system in a kind of containment, it includes mini optical fibres probe, the spectroanalysis instrument based on direct absorption process TDLAS technology and for the digital display device of real-time display that several are mounted on containment internal leakage monitoring point, it is communicated with each other connection between mini optical fibre probe and the spectroanalysis instrument by armored fiber optic, communicate with each other connection between the digital display device and the spectroanalysis instrument；Compared with prior art, the multi-measuring point of gaseous state leaked steam is directly monitored under containment environment, higher main steam line leakage monitoring sensitivity, faster response time are provided, reaction speed after promoting discovery leakage significantly, bigger safety allowance is provided, realizes the purpose of this utility model.
Description
Technical field
The utility model relates to a kind of leakage monitoring system, in particular to main steam in a kind of containment based on nuclear power plant
Line leakage system.
Background technique
(first leak) application of criterion in design of nuclear power plant before broken about LBB, it is desirable that nuclear power plant has higher for important
The leakage monitoring ability of pipe-line system.Using leakage monitoring system, the leakage of pipeline can be timely and effectively found, and have enough
Time take corresponding treatment measures, thus avoid pipeline further rupture generate serious accident.
Currently, main steam line leakage monitoring technology commonly used in design of nuclear power plant, as containment sump liquid level is surveyed
The response times such as amount are longer, and positioning and quantitative accuracy are poor, it is therefore desirable to increase in the main steam line using LBB technology and let out
Monitoring system is leaked, to meet the requirement of LBB, realizes monitoring method diversity.
It is above-mentioned existing to solve therefore, it is necessary to a kind of spectroscopic methodology leakage monitoring system for nuclear power plant's main steam line
There are the problem of.
Direct absorption process TDLAS (tunable diode laser absorption spectroscopy) technology is made using near-infrared diode laser
For light source, the laser for generating high frequency narrow-band passes through monitored gas, passes absorption spectrum signal after photo eye reception
Defeated time analyzer obtains monitoring gas concentration by analytical calculation.The Core Superiority of direct absorption process TDLAS technology is qualitative
Peak-to-peak signal is absorbed rather than second harmonic signal with quantitative analysis gas, really realizes analyzer without system drifting, analyzer is lifelong
Without calibration；Analyzer can be also configured to the analyzer system of multichannel by the laser of optical fiber output, realize multiple spot
It monitors simultaneously.
Utility model content
The purpose of this utility model is to provide main steam line leakage monitoring systems in a kind of containment, for existing skill
The deficiency of art, main steam line leakage rate in real-time monitoring containment, accurately rapidly finds out leakage point, to ensure nuclear power plant
Safe operation.
The technical issues of the utility model is solved can be realized using following technical scheme:
Main steam line leakage monitoring system in a kind of containment, which is characterized in that it includes that several are mounted on safety
The mini optical fibre probe of shell internal leakage monitoring point, the spectroanalysis instrument based on direct absorption process TDLAS technology and for aobvious in real time
The digital display device shown is communicated with each other connection between mini optical fibre probe and the spectroanalysis instrument by armored fiber optic, institute
State the connection that communicates with each other between digital display device and the spectroanalysis instrument.
In one embodiment of the utility model, the both ends of the mini optical fibre probe are optical fiber interface, and centre is to engrave
Air chamber, ambient gas can pass freely through hollow out gas chamber, and the both ends of the hollow out gas chamber are collimation lenses.
In one embodiment of the utility model, mini optical fibre probe is mounted on main steam line and insulating layer
At gap, laser beam is imported and exported by armored fiber optic, armored fiber optic passes through the fiber optic cable interface and spectrum point of containment
Analyzer connection, does not influence main steam line normal use in containment.
In one embodiment of the utility model, the quantity of the mini optical fibre probe can be determined according to actual requirement,
It is respectively arranged in leakage monitoring point.
In one embodiment of the utility model, the armored fiber optic is high temperature resistant radiation resistance stainless steel armored fiber optic,
It can be used for a long time at 400 DEG C or less, for connecting mini optical fibre probe and spectroanalysis instrument, meet working environment in containment and want
It asks.
In one embodiment of the utility model, the spectroanalysis instrument is arranged outside containment, passes through armored fiber optic
It is connected with the mini optical fibre probe in containment.
Main steam line leakage monitoring system in the containment of the utility model, compared with prior art, in safe girdle
The multi-measuring point of gaseous state leaked steam is directly monitored under border, provide higher main steam line leakage monitoring sensitivity, faster
Response time, the reaction speed after promoting discovery leakage significantly provide bigger safety allowance, realize the mesh of the utility model
's.
The characteristics of the utility model, sees the detailed description of the drawings of the present case and following preferable embodiment and obtains clear
Ground understands.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of main steam line leakage monitoring system in the containment of the utility model；
Fig. 2 is the flow diagram of main steam line leakage monitoring system in the containment of the utility model.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under
Face combines and is specifically illustrating, and the utility model is further described.
Embodiment
As depicted in figs. 1 and 2, main steam line leakage monitoring system in the containment of the utility model, it includes several
A mini optical fibre probe 10, the spectrum analysis based on direct absorption process TDLAS technology for being mounted on containment internal leakage monitoring point
Instrument 20 and digital display device 30 for real-time display pass through armored fiber optic 40 between mini optical fibre probe 10 and spectroanalysis instrument 20
Communicate with each other connection, and communicate with each other connection between digital display device 30 and spectroanalysis instrument 20.
In the present embodiment, the both ends of mini optical fibre probe 10 are optical fiber interface, and centre is hollow out gas chamber, and ambient gas can
Hollow out gas chamber is passed freely through, the both ends of the hollow out gas chamber are collimation lenses.
In the present embodiment, mini optical fibre probe 10 is mounted at the gap of main steam line 50 and insulating layer 60, is passed through
Laser beam is imported and is exported by armored fiber optic 40, and armored fiber optic 40 passes through the fiber optic cable interface of containment and spectroanalysis instrument 20 connects
It connects, does not influence main steam line normal use in containment.
In the present embodiment, the quantity of mini optical fibre probe 10 can be determined according to actual requirement, be respectively arranged and supervised in leakage
Measuring point.The main material of mini optical fibre probe 10 is 316SS, and lens are quartz materials, can be in 400 DEG C of hot environments below
Permanent work, meets job requirement in npp safety shell.
In the present embodiment, armored fiber optic 40 is high temperature resistant radiation resistance stainless steel armored fiber optic, can be permanent at 400 DEG C or less
It uses, for connecting mini optical fibre probe 10 and spectroanalysis instrument 20, meets operating environment requirements in containment.
In the present embodiment, spectroanalysis instrument 20 (including laser emitter, analysis module and signal output port) is arranged
Outside containment, it is connected by armored fiber optic 40 with the mini optical fibre probe 10 in containment.
Spectroanalysis instrument 20 uses 13XXnm laser, and at this wavelength, the monitoring sensitivity of H2O can achieve 1ppm/
Every meter of light path, the light path of miniature probe are about 20mm, and monitoring sensitivity is about 50ppm, i.e. volumn concentration is
0.05%, the monitoring upper limit is 50%；H2O content in surveyed gas is about 0.5%-3%, and measurement accuracy and range satisfaction are wanted
It asks.
Spectroanalysis instrument 20 is used to lock vaporous water absorption peak, qualitative and quantitative analysis vaporous water absorption peak using reference cell
Signal, analyzer are lifelong without calibration without system drifting.
Spectroanalysis instrument 20 use optical fiber output laser, analyzer be configured to the analyzer system of multichannel, it can be achieved that
Live multiple spot monitors simultaneously and real-time monitoring, and the response time is within 1min.
Its effect is illustrated below with reference to the working principle of the utility model:
By taking the existing leakage monitoring system of main steam line in CAP1000 npp safety shell as an example, main steam line 50 is sent out
After raw leakage, condensate liquid is back to containment sump under the effect of gravity, can be supervised in 1h by monitoring containment sump liquid level
Measure 0.5gpm not can recognize pipe leakage.The condensation of containment sump liquid level measurement precision and response time and leaked steam
Recovering state is related, is influenced by many factors such as environmental condition, media transport paths, and interior other of containment not can recognize and let out
Leakage will also result in containment sump liquid level or containment floods liquid level rising, and the response time is longer, and precision is lower.
Using main steam line leakage monitoring system in the utility model containment, by TDLAS technology to leakage point gas
State water content carries out in real time directly measurement, it can be achieved that, the response time higher to the leakage of main steam line 50 precision monitors faster.
The utility model during main steam line leakage monitoring, if steam leakage occurs for leakage point, is pacified in containment
Gaseous state water content will increase in full shell, and gas is by the hollow out gas chamber of mini optical fibre probe 10, and laser beam is from mini optical fibre probe
The lens of 10 one end are irradiated to other end lens across hollow out gas chamber at after directional light, and light beam is gathered output by other end lens
Spectral transmissions with vaporous water absorption signal are returned spectroanalysis instrument 20 by optical fiber, output optical fibre.Spectroanalysis instrument 20 is to gaseous state
Water absorbs peak-to-peak signal and is analyzed and calculated, and obtains gaseous state water concentration, and result is output to digital display dress in the form of current signal
30 are set, has achieved the purpose that leak main steam line the accurate fast slowdown monitoring of progress.
Main steam line leakage monitoring system in the utility model containment, will be obviously improved leakage monitoring system precision,
The monitoring response time is greatly reduced.Compared with existing nuclear power plant's main steam line leakage monitoring system, the response time is dropped by 1h
Down within 1min, the capture and monitoring in leakage steam gaseous stage are realized, there is significantly more practicability.
In view of higher temperature in the precision of existing monitoring system is not high, the response time is long disadvantage and containment, compared with
The harsh environmental conditions in small space, to meet the npp safety constantly promoted requirement, the utility model takes direct absorption
Method TDLAS technology is monitored gaseous state water content in containment, and mini optical fibre probe 10 is arranged in containment and carries out light
Spectrum signal acquisition carries out direct signal transmission by armored fiber optic 40, is absorbed using gas of the spectroanalysis instrument 20 to multichannel
Peak-to-peak signal is analyzed and is calculated, and carries out real-time display to the concentration results of multiple measuring points, can be efficiently and rapidly to safety
Main steam line leakage situation is monitored in shell, effectively promotes npp safety allowance.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention, the utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (6)
1. main steam line leakage monitoring system in a kind of containment, which is characterized in that it includes that several are mounted on containment
Internal leakage monitoring point mini optical fibre probe, the spectroanalysis instrument based on direct absorption process TDLAS technology and be used for real-time display
Digital display device, communicated with each other connection between mini optical fibre probe and the spectroanalysis instrument by armored fiber optic, it is described
Communicate with each other connection between digital display device and the spectroanalysis instrument.
2. main steam line leakage monitoring system in containment as described in claim 1, which is characterized in that the mini optical fibre
The both ends of probe are optical fiber interface, and centre is hollow out gas chamber, and ambient gas can pass freely through hollow out gas chamber, the hollow out gas chamber
Both ends are collimation lenses.
3. main steam line leakage monitoring system in containment as described in claim 1, which is characterized in that the mini optical fibre
Probe is mounted at the gap of main steam line and insulating layer, and laser beam is imported and exported by armored fiber optic, armouring light
The fiber optic cable interface that fibre passes through containment is connect with spectroanalysis instrument.
4. main steam line leakage monitoring system in containment as described in claim 1, which is characterized in that the mini optical fibre
The quantity of probe can be determined according to actual requirement, be respectively arranged in leakage monitoring point.
5. main steam line leakage monitoring system in containment as described in claim 1, which is characterized in that the armored fiber optic
For high temperature resistant radiation resistance stainless steel armored fiber optic.
6. main steam line leakage monitoring system in containment as described in claim 1, which is characterized in that the spectrum analysis
Instrument is arranged outside containment, is connected by armored fiber optic with the mini optical fibre probe in containment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821492176.3U CN209461163U (en) | 2018-09-12 | 2018-09-12 | Main steam line leakage monitoring system in a kind of containment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821492176.3U CN209461163U (en) | 2018-09-12 | 2018-09-12 | Main steam line leakage monitoring system in a kind of containment |
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| Publication Number | Publication Date |
|---|---|
| CN209461163U true CN209461163U (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821492176.3U Active CN209461163U (en) | 2018-09-12 | 2018-09-12 | Main steam line leakage monitoring system in a kind of containment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109087719A (en) * | 2018-09-12 | 2018-12-25 | 上海核工程研究设计院有限公司 | Main steam line leakage monitoring system in a kind of containment |
-
2018
- 2018-09-12 CN CN201821492176.3U patent/CN209461163U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109087719A (en) * | 2018-09-12 | 2018-12-25 | 上海核工程研究设计院有限公司 | Main steam line leakage monitoring system in a kind of containment |
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |