CN104848994A - Valve leakage detecting system and method based on three-dimensional temperature reconstruction - Google Patents
Valve leakage detecting system and method based on three-dimensional temperature reconstruction Download PDFInfo
- Publication number
- CN104848994A CN104848994A CN201510185853.1A CN201510185853A CN104848994A CN 104848994 A CN104848994 A CN 104848994A CN 201510185853 A CN201510185853 A CN 201510185853A CN 104848994 A CN104848994 A CN 104848994A
- Authority
- CN
- China
- Prior art keywords
- valve
- temperature
- checked
- detection
- steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Abstract
The present invention provides a valve leakage detecting system and method based on three-dimensional temperature reconstruction, and belongs to the technical field of thermal power engineering. Technical problems such as difficulties in realization of middle and long distance leakage detection of valves, in realization of quantified leakage detection by infrared technology, and in temperature correction for valves with different surface materials or different roughness, and limits in measuring precision are solved. The system and method are characterized in that measurements of surface materials or roughness of the valves are not required for temperature correction, a three-dimensional temperature field reconstruction model is established, the spray cooling technology is applied to valve pressure tests to accurately determine leaking points, and leakage amount quantitative detection is realized through a relation curve between a leakage amount of the leaking points and a temperature gradient. With adoption of the system and method, middle and long distance valve leakage detection is realized, qualitative detection of leaking points and quantitative detection of leakage amount are realized by thermal infrared imagers, the difficulty that a material surface emissivity is required to be detected by the conventional infrared thermography inspection technology is solved, the detection precision is raised, and high security and feasibility are achieved.
Description
Technical field
The invention belongs to Thermal Power Engineering Field, adopt temperature analysis and thermal imaging method checks metal valve outgoing and Jian Jian department is detected valve mass.
Background technology
Valve is extremely wide as general pipeline software application scope, except application on pressure pipeline, is also applied in boiler, pressure vessel field, is called as the cell of " pressure-bearing class special equipment ".Due to the safety monitor work of duct element, inspection work comparatively boiler, pressure vessel starting is late, add that it designs, manufacture, install, transformation, maintenance, the standard of the aspects such as supervision, specification is incomplete, thus in use constantly there is serious security incident in duct element, such as mountain, small ocean, Pudong New District in 2009 LNG pipeline flange bursting accident, in May, 2007, Anhui liquefied ammonia valve material grey cast iron caused leakage accident, somewhere steam in 2010 with PN16 level Zhejiang produce plunger valve in a pre-installation pressure test time cause explosion because of casting quality problem, major accident 3 people is there is and dies instantly etc. in Dong Ou street, Yongjia, Wenzhou on the 11st Dec in 2012 valve enterprise in high pressure valve pressure testing process.These lessons written in blood bring huge challenge to the safety verification work of valve, and seek one the more effective valve examination method of safety is very urgent more simultaneously.
At present, conventional leak hunting method has bubble method detection, helium mass spectrum leak detection method, halogen leak detection, thermal conductance leak detecting, pressure change leak detecting, audition method, ammonia leak detecting and ultrasonic leak detection method.Traditional bubble method detection has the fast and low cost and other advantages of simple to operate, detection speed, but its precision is lower, easily causes security incident; Helium mass spectrum leak detection has high sensitivity, and environmentally safe, but take too high and operative technique requirement is higher because of its leak detection, is not used widely; Halogen leak detector is simple to operate, and expense is low, can determine size and the position of small opening, be applied to the Leak Detection of refrigeration plant more; Thermal conductance leak detecting is a kind of semi-quantitative analysis technology, is used for detecting leaking and determining position, still can not realize quantitative test; Pressure change leak detecting comprises boosting and step-down leak detecting, its sensitivity and selected thermometer and manometric sensitivity closely related, the sealable valve being only applicable to volume little is hunted leak; The sensitivity of audition method is low, and the size of sub-audible sound that small opening produces and the interference of ambient noise signal all can affect result of detection; Ammonia leak detecting is higher than the sensitivity of bubble method detection, but cannot realize the long distance detection then not yet satisfied requirement to security; Scientist is devoted to the indestructive leakage-check mode of ultrasound wave contact sonde in recent years, has the measuring accuracy of very high leak source position, and can realize long distance and detect, but neighbourhood noise also can produce certain impact and equipment cost is higher.In sum, current existing leak hunting method has different sensitivity, the scope of application and operability.
In pressure test process, the method that leak hunting method many dependence human eye, tensimeter etc. are subjective and simple and crude, poor stability, leakage rate can not accurate quantitative analysis, efficiency low; And rely on human eye close-ups, in high pressure gas leakage test, easily produce security incident.Therefore, it is necessary for exploring a kind of novel reliable valve leak detection scheme.
Summary of the invention
The object of this invention is to provide a kind of and system of quantitative measurement valve leakage automatic inspection qualitative based on Infrared Thermography Technology, Infrared Thermography Technology is applied in valve pressure test by this system, with traditional thermal image detection method unlike: to cold conditions, hot surface establishes temperature reconfiguration system, adopt the partition analysis method of valve surface, obtain valve surface and pass into the temperature distribution gradients before and after high-temperature high-pressure steam, establish the relation of thermograde and leakage rate, and carry out in conjunction with spray cooling the confirmation whether temperature singular point is leak source, the medium and long distance achieving pressure test controls to check, the while of greatly carrying high-precision, avoid the generation of security incident.
Technical scheme of the present invention:
Valve leak detection system based on three dimensional temperature reconstruct comprises cooling water nozzle 1, thermal infrared imager 2, valve to be checked 3, first gate valve 4, blow-off line 5, steam discharge gathering-device 6, steam raising plant 7, admission pipeline 8 and the second gate valve 9.Steam raising plant 7 connects valve 3 to be checked via admission pipeline 8, second gate valve 9 controls the inflow of steam on admission pipeline 8, valve 3 to be checked connects steam discharge gathering-device 6 by blow-off line 5, first gate valve 4 controls the discharge of steam, cooling water nozzle 1 is just horizontally disposed to valve 3 detection faces to be checked with thermal infrared imager 2, and angle is less than 60 degree.
Valve leak detection system of the present invention is used for valve leak hunting method, apart from valve 3 to be checked for cooling water nozzle 1 is fixed with thermal infrared imager 2 on sliding rail by safe distance place, thermal infrared imager 2 is utilized to set up Temperature Distribution standard, in same material with under roughness Temperature Distribution continuous print theoretical direction, Temperature Distribution region is divided by visible images and infrared image contrast intelligence, as accompanying drawing 2, set up the three-dimensional standard temperature distributed model of valve surface by cooling water nozzle 1 and thermal infrared imager 2 along the movement of sliding rail.High-temperature high-pressure steam prepared by steam raising plant 7, valve 3 to be checked is entered via admission pipeline 8, close the first gate valve 4, second gate valve 9 afterwards, based on valve 3 surface three dimension Temperature Distribution master pattern to be checked as reference, the time dependent valve 3 surface three dimension temperature reconstruction model to be checked of temperature is set up, initial set temperature singular point by thermal infrared imager 2 recording function.The principle utilizing spray cooling can make thermograde more to highlight, cooling water nozzle 1 destroys original temperature field to valve 3 surface spray cooling to be checked, make valve 3 surface temperature field to be checked near uniform, after heating up again, two modelings is carried out to three-dimensional temperature field reconstruct, to confirm that temperature singular point is for leak source or find new small leak source.Utilize the relation curve of leakage rate and the thermograde set up, realize the qualitative detection of valve 3 leak source position to be checked and the quantitative detection of leak source leakage rate, finally open the first gate valve 4, in valve 3 to be checked, steam drains into steam discharge gathering-device 6.
Effect of the present invention and benefit: detect a flaw compared with mode with traditional infrared, consider the Temperature Distribution correction of subregion, temperature field, establish three dimensional temperature reconstruction model, and without the need to learning that concrete material kind and surfaceness are to revise Temperature Distribution, in running with valve, the standard temperature detected unlike having cold conditions distributes as a reference, eliminate the interference of other temperature variation conditions, and carried out misting cooling temperature field and again reconstruct to confirm whether singular point is leak source or finds new small leak source; Compared with other leak hunting method, avoid traditional detection means (as the bubble method detection) defect in security and precision, simultaneously economical and practical than novel leak hunting method (as ultrasonic leak detection method), feasibility is high.
Accompanying drawing explanation
Fig. 1 the present invention is based on the valve leak detection system of three dimensional temperature reconstruct and the one-piece construction schematic diagram of method.
According to the subregion schematic diagram of Temperature Distribution when Fig. 2 is Criterion temperature model.
In figure: 1 cooling water nozzle; 2 thermal infrared imagers; 3 valves to be checked; 4 first gate valves; 5 blow-off lines; 6 steam discharge gathering-devices; 7 steam raising plants; 8 admission pipelines; 9 second gate valves;
Numeral 1., 2., 3., 4. ... what represent is the partitioning scenario set up based on initial temperature field distribution, and can mark off multiple region according to actual conditions.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with technical scheme and accompanying drawing.
Valve pressure test platform fixes valve 3 to be checked, sliding rail apart from valve test bed safe distance place is fixed cooling water nozzle 1 and thermal infrared imager 2, level is just to valve detection face and both angles are less than 60 degree, regulate thermal infrared imager 2 zoom, valve 3 entirety to be checked is made to enter in picture, and guarantee that picture is clear, open thermal infrared imager 2 camera function, in conjunction with visible images and Infrared Thermogram, the temperature distributing disproportionation even region of intelligence division as accompanying drawing 2 1., 2., 3. valve surface three dimensional temperature distribution standard model is set up along the movement of sliding rail by cooling water nozzle 1 and thermal infrared imager 2.Open the second gate valve 9, high-temperature high-pressure steam enters valve 3 to be checked via admission pipeline 8.Close the first gate valve 4, second gate valve 9, scanning records the Temperature Distribution on valve 3 surface to be checked over time.The thermal imagery video recording recorded by thermal infrared imager 2 proceeds to computer software smartview and analyzes, and sets up and the time dependent three dimensional temperature reconstruction model of thermograde.As bulk temperature change in each region of valve 3 to be checked evenly raises, then can preliminary judgement valve No leakage; As certain some temperature variation of valve 3 to be checked and the temperature variation more obvious (as accompanying drawing 1 partial enlarged drawing, the darker representation temperature of color is higher) with zoning, it is shorter that temperature raises required time, then this point of preliminary judgement is singular point.Cooling water nozzle 1, to valve 3 misting cooling to be checked, again records the temperature variations of valve 3 to be checked, again sets up three dimensional temperature reconstruction model.If still comparatively obvious with region temperature variation without certain some temperature variation, then can determine valve 3 No leakage to be checked; If find the temperature singular point of three-dimensionalreconstruction model first or find new temperature singular point, then confirm as leak source, this thermograde and the valve leakage automatic inspection change curve with thermograde is contrasted, draw the size of leakage rate, in conjunction with Infrared Thermogram and visible images, determine the position of leakage point.Finally, open the first gate valve 4, steam drains into steam discharge gathering-device 6 via blow-off line 5.
Claims (2)
1. the valve leak detection system based on three dimensional temperature reconstruct, it is characterized in that, this valve leak detection system comprises cooling water nozzle, thermal infrared imager, valve to be checked, the first gate valve, blow-off line, steam discharge gathering-device, steam raising plant, admission pipeline and the second gate valve; Steam raising plant connects valve to be checked via admission pipeline, second gate valve controls the inflow of steam on admission pipeline, valve to be checked connects steam discharge gathering-device by blow-off line, first gate valve controls the discharge of steam, cooling water nozzle and thermal infrared imager are just horizontally disposed to valve detection face to be checked, and cooling water nozzle and thermal infrared imager angle are less than 60 degree.
2. valve leak detection system according to claim 1 is used for the method for valve leak detection, it is characterized in that:
Be that cooling water nozzle and thermal infrared imager are fixed on sliding rail by safe distance place apart from valve to be checked, discuss with roughness Temperature Distribution continuous arranging according to same material, divide Temperature Distribution region by visible images and infrared image contrast intelligence, set up the three-dimensional standard temperature distributed model of valve surface by cooling water nozzle and thermal infrared imager along the movement of sliding rail; High-temperature high-pressure steam prepared by steam raising plant, valve to be checked is entered via admission pipeline, close the first gate valve and the second gate valve, based on valve surface three dimensional temperature distribution standard model to be checked as reference, the time dependent valve surface three dimensional temperature reconstruction model to be checked of temperature is set up, initial set temperature singular point by thermal infrared imager recording function; Utilize Spray Way that thermograde is highlighted more, cooling water nozzle destroys original temperature field to valve surface misting cooling to be checked, makes valve surface uniform temperature fields to be checked; Intensification carries out two modelings to three-dimensional temperature field reconstruct, confirms that temperature singular point is leak source or finds new small leak source; Utilize the relation curve of leakage rate and the thermograde set up, realize the qualitative detection of valve leak source position to be checked and the quantitative detection of leak source leakage rate, finally open the first gate valve, in valve to be checked, steam drains into steam discharge gathering-device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510185853.1A CN104848994B (en) | 2015-04-17 | 2015-04-17 | Valve leak detection system and method based on three dimensional temperature reconstruct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510185853.1A CN104848994B (en) | 2015-04-17 | 2015-04-17 | Valve leak detection system and method based on three dimensional temperature reconstruct |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104848994A true CN104848994A (en) | 2015-08-19 |
| CN104848994B CN104848994B (en) | 2018-01-30 |
Family
ID=53848808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510185853.1A Active CN104848994B (en) | 2015-04-17 | 2015-04-17 | Valve leak detection system and method based on three dimensional temperature reconstruct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104848994B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223203A (en) * | 2015-10-23 | 2016-01-06 | 王海平 | A kind of infrared facility of valve body carrying out flaw detection |
| CN106092446A (en) * | 2016-07-29 | 2016-11-09 | 大连理工大学 | Valve leak detecting system based on infrared thermal imaging technique and method |
| CN106441712A (en) * | 2016-09-29 | 2017-02-22 | 天津大学 | Method for quantitatively detecting permeability of cold air based on infrared thermal imaging technology |
| CN107121238A (en) * | 2017-05-12 | 2017-09-01 | 上海电力学院 | A kind of eminence gas leak detection method for hot-gas channel |
| CN109505588A (en) * | 2017-09-15 | 2019-03-22 | 中国石油天然气股份有限公司 | The abatement detecting method of dumpflood well water injection valve |
| CN112098001A (en) * | 2020-09-25 | 2020-12-18 | 三门核电有限公司 | Valve internal leakage detection method and device |
| CN112747863A (en) * | 2020-12-02 | 2021-05-04 | 江苏大洋海洋装备有限公司 | Device is recycled in damage detection restoration of old and useless equipment of ocean |
| CN113701176A (en) * | 2021-07-12 | 2021-11-26 | 华能国际电力股份有限公司德州电厂 | Liquid-cooled boiler steam soot blower system based on temperature early warning |
| CN113945323A (en) * | 2020-07-16 | 2022-01-18 | 苏州协同创新智能制造装备有限公司 | Air tightness detection method and detection system of ball valve equipment |
| CN113990044A (en) * | 2021-11-19 | 2022-01-28 | 福建钰融科技有限公司 | Waste liquid transportation safety early warning method, safety early warning device and related products |
| CN114061931A (en) * | 2021-11-17 | 2022-02-18 | 安徽新力电业科技咨询有限责任公司 | Test ball for ball passing test and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050126263A1 (en) * | 2002-07-02 | 2005-06-16 | Carrier Corporation | Leak detection with thermal imaging |
| CN101281079A (en) * | 2008-05-12 | 2008-10-08 | 北京理工大学 | Method and system for detecting and positioning leakage based on infrared imaging technique |
| EP2352003A2 (en) * | 2010-02-01 | 2011-08-03 | The Boeing Company | Methods and systems for evaporative cooling infrared thermographic leak detection |
| CN102305808A (en) * | 2011-07-27 | 2012-01-04 | 中国科学院长春光学精密机械与物理研究所 | Infrared thermal image-based thermos cup tester and testing method thereof |
| CN103575475A (en) * | 2012-08-09 | 2014-02-12 | 北汽福田汽车股份有限公司 | Vehicle sealing performance detecting device and method |
| CN204556173U (en) * | 2015-04-17 | 2015-08-12 | 温州市特种设备检测研究院 | Based on the valve leak detection system of three dimensional temperature reconstruct |
-
2015
- 2015-04-17 CN CN201510185853.1A patent/CN104848994B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050126263A1 (en) * | 2002-07-02 | 2005-06-16 | Carrier Corporation | Leak detection with thermal imaging |
| CN101281079A (en) * | 2008-05-12 | 2008-10-08 | 北京理工大学 | Method and system for detecting and positioning leakage based on infrared imaging technique |
| EP2352003A2 (en) * | 2010-02-01 | 2011-08-03 | The Boeing Company | Methods and systems for evaporative cooling infrared thermographic leak detection |
| CN102305808A (en) * | 2011-07-27 | 2012-01-04 | 中国科学院长春光学精密机械与物理研究所 | Infrared thermal image-based thermos cup tester and testing method thereof |
| CN103575475A (en) * | 2012-08-09 | 2014-02-12 | 北汽福田汽车股份有限公司 | Vehicle sealing performance detecting device and method |
| CN204556173U (en) * | 2015-04-17 | 2015-08-12 | 温州市特种设备检测研究院 | Based on the valve leak detection system of three dimensional temperature reconstruct |
Non-Patent Citations (1)
| Title |
|---|
| 田鹏飞: "红外热成像气密性检测方法的技术探讨", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223203B (en) * | 2015-10-23 | 2018-04-10 | 王海平 | A kind of infrared facility of valve body carrying out flaw detection |
| CN105223203A (en) * | 2015-10-23 | 2016-01-06 | 王海平 | A kind of infrared facility of valve body carrying out flaw detection |
| CN106092446A (en) * | 2016-07-29 | 2016-11-09 | 大连理工大学 | Valve leak detecting system based on infrared thermal imaging technique and method |
| CN106092446B (en) * | 2016-07-29 | 2018-11-09 | 大连理工大学 | Valve leak detecting system based on infrared thermal imaging technique and method |
| CN106441712A (en) * | 2016-09-29 | 2017-02-22 | 天津大学 | Method for quantitatively detecting permeability of cold air based on infrared thermal imaging technology |
| CN106441712B (en) * | 2016-09-29 | 2019-06-04 | 天津大学 | Method based on infrared thermal imaging technique quantitative detection Air Infiltration |
| CN107121238A (en) * | 2017-05-12 | 2017-09-01 | 上海电力学院 | A kind of eminence gas leak detection method for hot-gas channel |
| CN109505588A (en) * | 2017-09-15 | 2019-03-22 | 中国石油天然气股份有限公司 | The abatement detecting method of dumpflood well water injection valve |
| CN109505588B (en) * | 2017-09-15 | 2022-03-29 | 中国石油天然气股份有限公司 | Failure detection method for water injection valve of gravity flow water injection well |
| CN113945323A (en) * | 2020-07-16 | 2022-01-18 | 苏州协同创新智能制造装备有限公司 | Air tightness detection method and detection system of ball valve equipment |
| CN112098001A (en) * | 2020-09-25 | 2020-12-18 | 三门核电有限公司 | Valve internal leakage detection method and device |
| CN112747863A (en) * | 2020-12-02 | 2021-05-04 | 江苏大洋海洋装备有限公司 | Device is recycled in damage detection restoration of old and useless equipment of ocean |
| CN112747863B (en) * | 2020-12-02 | 2023-04-21 | 江苏大洋海洋装备有限公司 | Ocean waste equipment damage detection, repair and recycling device |
| CN113701176A (en) * | 2021-07-12 | 2021-11-26 | 华能国际电力股份有限公司德州电厂 | Liquid-cooled boiler steam soot blower system based on temperature early warning |
| CN113701176B (en) * | 2021-07-12 | 2024-01-19 | 华能国际电力股份有限公司德州电厂 | Liquid-cooled boiler steam soot blower system based on temperature early warning |
| CN114061931A (en) * | 2021-11-17 | 2022-02-18 | 安徽新力电业科技咨询有限责任公司 | Test ball for ball passing test and application thereof |
| CN113990044A (en) * | 2021-11-19 | 2022-01-28 | 福建钰融科技有限公司 | Waste liquid transportation safety early warning method, safety early warning device and related products |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104848994B (en) | 2018-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104848994A (en) | Valve leakage detecting system and method based on three-dimensional temperature reconstruction | |
| EP2881732B1 (en) | Thermographic inspection techniques | |
| US3566669A (en) | Method and apparatus for thermally examining fluid passages in a body | |
| RU2403562C1 (en) | Method for thermal non-destrictive inspection of heat engineering characteristics of multilayer structures in non-steady heat transfer conditions | |
| CN105606222A (en) | Flame three-dimensional temperature field measurement imaging device, measuring device and measuring method | |
| CN103235034A (en) | Natural gas long-distance pipeline three-dimensional high-definition magnetic leakage internal detection apparatus | |
| CN109520671A (en) | Cold-hot wind infiltration capacity method for quantitative measuring based on infrared thermal imaging technique | |
| CN204556173U (en) | Based on the valve leak detection system of three dimensional temperature reconstruct | |
| CN103344388A (en) | Performance evaluation device and method for gas leakage infrared imaging detecting system | |
| CN105466495B (en) | Measuring method that is a kind of while obtaining pars intramuralis non-uniform temperature field and wall thickness | |
| CN107356596A (en) | Underwater spotting imaging device and optical imagery method water turbidity online test method | |
| CN106017808A (en) | Method and system for diagnosing inner leakage amount of drain valve | |
| Beckedorff et al. | Flow statistics in plate and shell heat exchangers measured with PTV | |
| CN205981498U (en) | Cryogenic insulation pipeline heat leakage measures on - line measuring device | |
| CN106124136B (en) | A kind of sintering ring cold machine trolley air leak rate of air curtain on-line testing method | |
| Kim et al. | A leak detection and 3D source localization method on a plant piping system by using multiple cameras | |
| CN107860516A (en) | Valve leak detection system based on three dimensional temperature reconstruct | |
| CN108380248B (en) | Temperature separation device for cryogenic vacuum environment simulation system | |
| US20220349589A1 (en) | A method and an apparatus for determining a deviation in a thermal energy circuit | |
| JP2010230596A (en) | Underground piping gas leakage investigation method | |
| CN110531049A (en) | A kind of combustion gas yard determines the measurement method and device of hydrate inhibitor injection rate | |
| CN204924496U (en) | Hot welding machine temperature -detecting device of polyethylene pipeline under pressure | |
| Babak et al. | Methods for Diagnosing the Technical Condition of Heating Networks Pipelines | |
| Williams et al. | Studies of deteriorated heat transfer in prismatic cores stemming from irradiation-induced geometry distortion | |
| CN112927828B (en) | Nuclear power station pipeline leakage simulation test system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |