CN108695005A - A kind of dynamic measurement device and method of fusant hard shell thickness and boundary temperature - Google Patents
A kind of dynamic measurement device and method of fusant hard shell thickness and boundary temperature Download PDFInfo
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- CN108695005A CN108695005A CN201810395257.XA CN201810395257A CN108695005A CN 108695005 A CN108695005 A CN 108695005A CN 201810395257 A CN201810395257 A CN 201810395257A CN 108695005 A CN108695005 A CN 108695005A
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- Prior art keywords
- metal probe
- hard shell
- temperature
- fusant
- shell thickness
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses the dynamic measurement devices and method of a kind of fusant hard shell thickness and boundary temperature, the measuring device includes Linear actuator, metal probe and thermocouple, realizes that the dynamic of the boundary temperature between fusant hard shell thickness and fusant and hard shell measures;Single thermocouple is arranged in metal probe bottom;It is connect at the top of Linear actuator and metal probe, and metal probe can be moved with the precision of 0.1mm;Metal probe, when the temperature stopping variation that the thermocouple measurement for being arranged in metal probe bottom is arrived, shows that metal probe has touched the upper edge of fusant hard shell in moving process;Hard shell thickness can be calculated according to the displacement distance of metal probe and the height of pressure vessel at this time, the temperature that metal probe bottom thermocouple measures is boundary temperature;The dynamic measurement of hard shell thickness and boundary temperature provides a kind of effective approach during the present invention can test for nuclear reactor major accident safety research.
Description
Technical field
The present invention relates to nuclear power plant's major accident low head fusion pool heat transfer characteristic studying technological domains, and in particular to a kind of
The dynamic measurement device and method of fusant hard shell thickness and boundary temperature.
Background technology
When major accident occurs for nuclear power plant's presurized water reactor, if reactor core cannot be effectively cooled, core meltdown will occur,
The reactor core fusant of high temperature may fall into lower head of pressure vessel, and melting pool structure is formed in lower head of pressure vessel;
Under the action of reactor core fusant decay heat, high temperature melting melt pool transmits heat to lower head of pressure vessel wall surface, leads to pressure vessel
Low head wall surface temperature increases, and seriously threatens the integrality of pressure vessel;If cannot have by lower head of pressure vessel wall surface
Effect ground exports the decay heat in fusion pool, then low head wall surface temperature can be increased constantly, and lower head of pressure vessel may be sent out
Raw high-temerature creep failure or directly burn through failure, make a large amount of high temperature reactor core fusant enter containment, may finally cause a large amount of
Radioactive substance is released to atmospheric environment, causes serious nuclear leakage accident;
Reactor core fusant enters pressure vessel leeward capitiform at melting pool structure, in pressure during severe accident of PWR
Under conditions of external container cooling, high-temperature molten can solidify, and be formed between liquid molten object and pressure vessel wall surface
One layer of fusant hard shell, the presence of fusant hard shell have an important influence to fusion pool heat exchange, at the same fusant and hard shell it
Between boundary temperature for determining that the Rayleigh number of molten bath heat exchange is particularly significant, therefore measurement and the phase of fusant hard shell thickness
The determination of interface temperature is a content paid close attention in fusant experimental study on heat transfer.
The presently disclosed measurement scheme about hard shell thickness and boundary temperature is less, document (Zhang Y P,
Zhang L T,Zhou Y K,et al.The COPRA experiments on the in-vessel melt pool
behavior in the RPV lower head[J].Annals of Nuclear Energy,2016,89:19-27.) carry
The scheme for measuring hard shell indirectly using multipoint thermocouple is gone out.Multipoint thermocouple is fixed on experimental section wall according to the angle of setting
On face, multipoint thermocouple side both ends are inserted into molten bath, and hard shell thickness is calculated according to the temperature of thermocouple measured.This side
The shortcomings that case is to measure position to fix, and the length of multipoint thermocouple also needs first to determine, when hard shell thickness is more than multipoint thermocouple
Length when, calculate that hard shell thickness might have larger deviation by temperature.Also, the program can not measure phase boundary
Face temperature.
Invention content
For overcome the deficiencies in the prior art, the present invention provides the dynamic of a kind of fusant hard shell thickness and boundary temperature
State measuring device and method can dynamically measure the fusant hard shell thickness at different location and corresponding boundary temperature.
In order to achieve the above object, the present invention adopts the following technical scheme that:
A kind of dynamic measurement device of fusant hard shell thickness and boundary temperature, including Linear actuator 1, setting are online
The metal probe 2 that can be moved up and down by the driving of Linear actuator 1 on property driver 1, is arranged the heat on metal probe 2
The extended line of galvanic couple 3, thermocouple 3 is arranged in inside metal probe 2, and from 2 Base top contact of metal probe;Linear actuator with
The precision stepping metal probe 2 of 0.1mm.
The punching of 2 bottom section of the metal probe is for arranging thermocouple 3, trepanning and the thermocouple 3 of 2 bottom of metal probe
Between gap utilize high-temp glue filling.
The metal probe 2 is the straight tube of inner hollow.
A kind of measurement method of the fusant hard shell thickness and the dynamic measurement device of boundary temperature, when measurement,
Slowly driving metal probe 2 moves Linear actuator 1 in pressure vessel;Liquid high temperature melting of the metal probe 2 in pressure vessel
Melt in object during movement, when the temperature stopping variation that the thermocouple 3 for being arranged in 2 bottom of metal probe measures, shows gold
Belong to the upper edge that probe 2 has touched liquid high-temperature molten bottom hard shell;According to the displacement distance and pressure vessel of metal probe 2
Height can calculate hard shell thickness, the temperature that 2 bottom thermocouple of metal probe measures is boundary temperature.
Compared to the prior art compared with, the invention has the advantages that:
1, measuring device of the invention can move integrally, and have the hard shell thickness and boundary temperature for being convenient for measuring arbitrary region
The advantage of degree.
2, measuring device of the invention drives metal probe by Linear actuator, utilizes the heat for being arranged in probe base
Galvanic couple captures hard shell forward position, by the displacement distance of probe directly calculates hard shell thickness, each compared to using multipoint thermocouple
The position of measuring point and the temperature that measures calculate that hard shell thickness is more accurate, and method is simple.
3, measuring device of the invention drives metal probe by Linear actuator, can obtain metal probe movement side
Upward regional temperature distribution.
Description of the drawings
Fig. 1 is that the dynamic measurement device of a kind of fusant hard shell thickness of the present invention and boundary temperature and the whole of method are tied
Structure schematic diagram.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings and detailed description:
As shown in Figure 1, a kind of dynamic measurement device of fusant hard shell thickness and boundary temperature of the present invention, including it is linear
Driver 1, metal probe 2, thermocouple 3.
The metal probe 2 is the metal straight pipe of inner hollow, facilitates the arrangement of 3 extended line of thermocouple;Meanwhile metal
The probe of 2 bottom opening of probe, single thermocouple 3 stretches out metal probe 2 by trepanning, and high-temp glue is utilized between probe and trepanning
It seals, prevents liquid in measurement process from entering inside metal probe, while the probe of thermocouple 3 can be fixed;Thermocouple 3 prolongs
Long line is arranged in inside metal probe 2, and from 2 Base top contact of metal probe;2 top of metal probe is connected with Linear actuator 1.
When measuring hard shell thickness, selection measures the region of hard shell thickness, and Linear actuator 1 is fixed on appropriate place,
Then start the movement metal probe 2 of Linear actuator 1 to move down in pressure vessel;Liquid of the metal probe 2 in pressure vessel
In state high-temperature molten during movement, when the temperature that the thermocouple 3 for being arranged in 2 bottom of metal probe measures stops becoming
Change, shows that metal probe 2 has touched the upper edge of liquid high-temperature molten bottom hard shell;According to the displacement distance of metal probe 2
And the height of pressure vessel can calculate hard shell thickness and (be subtracted to enter from metal probe 2 with the total height of pressure vessel and be pressed
Force container is until the distance that the upper edge of contact hard shell moves), while the temperature that 2 lowest point thermocouple measurement of metal probe is arrived is phase
Interface temperature;Metal probe 2 is driven additionally by Linear actuator 1, the region temperature on 2 moving direction of metal probe can be obtained
Degree distribution.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation mode of the present invention is only limitted to this, for the ordinary technical staff in the technical field of the invention, as long as
Within the spirit of the present invention, variation and modification to embodiment described above all should be considered as the power in the present invention
Within the scope of sharp claim.
Claims (4)
1. a kind of dynamic measurement device of fusant hard shell thickness and boundary temperature, it is characterised in that:Including Linear actuator
(1), the metal probe (2) that can be moved up and down by the driving of Linear actuator (1) on Linear actuator (1) is set, if
Set the thermocouple (3) on metal probe (2), it is internal that the extended line of thermocouple (3) is arranged in metal probe (2), and from metal
Probe (2) Base top contact;Linear actuator is with the precision stepping metal probe (2) of 0.1mm.
2. the dynamic measurement device of a kind of fusant hard shell thickness and boundary temperature according to claim 1, feature
It is:Metal probe (2) the bottom section punching is for arranging thermocouple (3), the trepanning of metal probe (2) bottom and thermoelectricity
It is filled using high-temp glue in gap between even (3).
3. the dynamic measurement device of a kind of fusant hard shell thickness and boundary temperature according to claim 1, feature
It is:The metal probe (2) is the straight tube of inner hollow.
4. a kind of fusant hard shell thickness of claims 1 to 3 any one of them and the dynamic measurement device of boundary temperature
Measurement method, it is characterised in that:When measurement, selection measures the region of hard shell thickness, and Linear actuator (1) slowly visit by driving metal
Needle (2) moves down in pressure vessel;The process that metal probe (2) moves in the liquid high-temperature molten of pressure vessel
In, when the temperature stopping variation that the thermocouple (3) for being arranged in metal probe (2) bottom measures, show that metal probe (2) has connect
Contact the upper edge of liquid high-temperature molten bottom hard shell;According to the displacement distance of metal probe (2) and the height energy of pressure vessel
Hard shell thickness is enough calculated, the temperature that metal probe (2) bottom thermocouple measures is boundary temperature;Additionally by linear
Driver (1) drives metal probe (2), can obtain the regional temperature distribution on metal probe (2) moving direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395257.XA CN108695005A (en) | 2018-04-27 | 2018-04-27 | A kind of dynamic measurement device and method of fusant hard shell thickness and boundary temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395257.XA CN108695005A (en) | 2018-04-27 | 2018-04-27 | A kind of dynamic measurement device and method of fusant hard shell thickness and boundary temperature |
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| CN108695005A true CN108695005A (en) | 2018-10-23 |
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| CN201810395257.XA Pending CN108695005A (en) | 2018-04-27 | 2018-04-27 | A kind of dynamic measurement device and method of fusant hard shell thickness and boundary temperature |
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Citations (9)
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| CN202092475U (en) * | 2011-06-08 | 2011-12-28 | 岳阳市巴陵节能炉窑工程有限公司 | Automatic lifting temperature measurement device |
| CN102507033A (en) * | 2011-10-20 | 2012-06-20 | 清华大学 | Method for measuring temperature of castings in cooling and directional-solidification process of liquid metal |
| CN104133505A (en) * | 2014-07-21 | 2014-11-05 | 昆明理工大学 | Temperature control device for refining metal solidification structure by use of pulse current |
| CN105333968A (en) * | 2015-09-24 | 2016-02-17 | 中冶长天国际工程有限责任公司 | Rotary kiln temperature-detecting device |
| CN105388193A (en) * | 2015-07-14 | 2016-03-09 | 王军伟 | Sliding barrel type molten salt electrochemical corrosion measurement device and measurement method |
| CN105445315A (en) * | 2014-09-23 | 2016-03-30 | 又进电子骑士有限公司 | Complex probe and shell container for complex probe |
| CN105806881A (en) * | 2016-05-11 | 2016-07-27 | 西安交通大学 | Experiment device for measuring heat transfer properties of high-rayleigh number fusion tank |
| CN107328806A (en) * | 2017-07-07 | 2017-11-07 | 西安交通大学 | A kind of measurement experiment device and method of fused mass duricrust thickness and growth rate |
-
2018
- 2018-04-27 CN CN201810395257.XA patent/CN108695005A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1926419A (en) * | 2003-09-25 | 2007-03-07 | 美铝公司 | Molten cryolitic bath probe |
| CN202092475U (en) * | 2011-06-08 | 2011-12-28 | 岳阳市巴陵节能炉窑工程有限公司 | Automatic lifting temperature measurement device |
| CN102507033A (en) * | 2011-10-20 | 2012-06-20 | 清华大学 | Method for measuring temperature of castings in cooling and directional-solidification process of liquid metal |
| CN104133505A (en) * | 2014-07-21 | 2014-11-05 | 昆明理工大学 | Temperature control device for refining metal solidification structure by use of pulse current |
| CN105445315A (en) * | 2014-09-23 | 2016-03-30 | 又进电子骑士有限公司 | Complex probe and shell container for complex probe |
| CN105388193A (en) * | 2015-07-14 | 2016-03-09 | 王军伟 | Sliding barrel type molten salt electrochemical corrosion measurement device and measurement method |
| CN105333968A (en) * | 2015-09-24 | 2016-02-17 | 中冶长天国际工程有限责任公司 | Rotary kiln temperature-detecting device |
| CN105806881A (en) * | 2016-05-11 | 2016-07-27 | 西安交通大学 | Experiment device for measuring heat transfer properties of high-rayleigh number fusion tank |
| CN107328806A (en) * | 2017-07-07 | 2017-11-07 | 西安交通大学 | A kind of measurement experiment device and method of fused mass duricrust thickness and growth rate |
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Application publication date: 20181023 |
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