CN101266843B - Siphon breaking device - Google Patents
Siphon breaking device Download PDFInfo
- Publication number
- CN101266843B CN101266843B CN2007100870086A CN200710087008A CN101266843B CN 101266843 B CN101266843 B CN 101266843B CN 2007100870086 A CN2007100870086 A CN 2007100870086A CN 200710087008 A CN200710087008 A CN 200710087008A CN 101266843 B CN101266843 B CN 101266843B
- Authority
- CN
- China
- Prior art keywords
- sodium
- pipe
- sodium pipe
- getting
- pile
- 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.)
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Links
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 70
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 70
- 239000011734 sodium Substances 0.000 claims abstract description 70
- 230000001681 protective effect Effects 0.000 claims abstract description 17
- 230000008676 import Effects 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 11
- 238000000746 purification Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention provides a siphon breaking device which is simple in structure, safe and reliable, and can reduce sodium leakage and delay the development speed of accidents so that operators can have enough time to process the accidents when the accidents of the rupture of the pipelines outside the reactor occur. The device comprises a sodium taking pipe, a circulating pump, a sodium taking pipe, a sodium returning pipe, a separating plate, an inlet orifice plate and a sodium collecting pipe, wherein the sodium taking pipe is connected with the circulating pump through an out-of-pile pipeline, the other end of the circulating pump is connected with the sodium returning pipe through an out-of-pile pipeline, the sodium taking pipe and the sodium returning pipe are fixed on the separating plate and respectively extend into two protective sleeves in a pile, the inlet orifice plate is positioned at the lower end of the sodium taking pipe, the fracture structure of the protective sleeve into which the sodium taking pipe extends is a Venturi; the aperture of the inlet orifice plate is 45 mm; the elevation of the sodium taking pipe is reduced.
Description
Technical field
The present invention relates to the additional adjusting gear field of flow, particularly a kind of siphon destroying device.
Background technology
Sodium of reactor adopts the out-pile purification style, and the most of pipeline in the purification circuit and the absolute altitude of equipment are lower than sodium liquid level absolute altitude in the reactor vessel.In case the out-pile pipeline breaks, high temperature, highly radioactive liquid sodium will form loss of sodium accident from the ejection of pipeline cut under heap internal pressure and the acting in conjunction of siphon power in the pond.This not only constitutes a threat to the inherently safe of reactor, and the high radioactivity gas colloidal sol of discharging with liquid sodium is with the severe contamination surrounding environment.
Only Russia proposed the non-active siphon destroying device primary design of pond formula fast reactor in the world, but still used without experimental verification and engineering.Found through experiments this design when normal operation of purification circuit and generation out-pile pipeline large break loss of sodium accident, its performance can not meet design requirement, and it shows: (1) is as purification flow rate 〉=5m
3During/h, purification circuit returns sodium pipeline section (in the heap) discharge ring top of chamber and produces the overflow of gas-liquid two-phase foam shape, and directly drops on the high temperature liquid sodium free face, hot sodium pond; (2) as purification flow rate 〉=5m
3During/h; purification circuit returns and produces a large amount of gas entrainments in the downtake of sodium pipeline section protective casing; when reloading liquid level; its volume concentration of gas phase is up to about 30%; these in case enter reactor core through cold drop and main circulation pump, will be caused the serious problems such as cavitation of reactor capability vibration, heat transfer deterioration and ebullator by gases of being carried secretly.In addition, produce pressure fluctuation and bring out in-pile component and the stream of reactor core assembly causes vibration, have a strong impact on the safe operation of reactor owing to gas may gather in cold drop and break; (3) when purification circuit out-pile pipeline cut loss of sodium accident taking place, the sodium leakage amount is bigger than normal, the sodium import of accident refrigeratory (independent heat exchanger) is exposed in gas, and influence its operate as normal, the waste heat that makes reactor can't be discharged and be produced serious consequence; When (4) the cut loss of sodium accident taking place, system lacks effective human intervention measure, and accident is finished as early as possible, and can only let nature take its course to stop.
Summary of the invention
The present invention has overcome shortcoming of the prior art, provides a kind of simple in structure, safe and reliable, when out-pile pipeline breaking accident takes place, reduces the sodium leakage amount, delays the speed of development of accident so that operating personnel have the siphon destroying device that the enough time handles.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: this device comprises that getting the sodium pipe is connected with ebullator by the out-pile pipeline, the other end of ebullator is connected with time sodium pipe by the out-pile pipeline, get the sodium pipe, return the sodium pipe and be fixed on the division board, extend into respectively in interior two protective casings of heap, the import orifice plate is positioned at the lower end of getting the sodium pipe, and the described fracture texture of getting the protective casing that the sodium pipe stretches into is a Venturi tube, and has 4 mesopores around it; The aperture of described import orifice plate is 45mm; Reduce the absolute altitude of getting the sodium pipe.
In order to make more stable operation of system; eliminate gas-liquid two-phase overflow and gas-entrained problem; better play the safeguard protection effect; the present invention is all right: the vertical openings of the outlet connection of described time sodium pipe is blind dead; open the aperture of a 6mm at the blind plate center, circumferentially open 16 10mm lateral aperture equably in the sodium pipe side of returning that is higher than blind plate 5～7mm simultaneously.The protective casing exit of described time sodium pipe increases the orifice plate of a 40mm.Described Venturi tube throat diameter is 50mm.Described median pore diameter is 20mm.Described out-pile pipeline is a bimetallic tube.
Compared with prior art, advantage of the present invention is: successful solution the complicated diphasic flow phenomenon of reactor large scale system when take place purifying the pipeline large break, when out-pile pipeline breaking accident takes place, make the speed of development of the minimizing of sodium leakage amount, accident delay to make operating personnel to have time enough to handle with non-enabling fashion, the consequence of reduction accident.
Description of drawings
Fig. 1 siphon destroying device simulated technological process figure
Fig. 2 returns sodium pipe outlet connection structure cut-open view
Fig. 3 gets sodium nozzle structure cut-open view
Among the figure: get 1 time sodium pipe of sodium pipe, 2 protective casings, 3 protective casings, 4 import orifice plates, 5 out-pile pipelines, 6 ebullators, 7 outlet connections, 8 apertures, 9 lateral aperture, 10 Venturi tubes, 11 mesopores, 12 division boards 13
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
This device comprises that getting sodium pipe 1 is connected with ebullator 7 by out-pile pipeline 6; the other end of ebullator 7 is connected with time sodium pipe 2 by out-pile pipeline 6; getting sodium pipe 1 is separately fixed on the division board 13 with time sodium pipe 2; getting sodium pipe 1 extend in the heap internal protective cover pipe 3; returning the sodium pipe extend in the protective casing 4; import orifice plate 5 is positioned at the lower end of getting sodium pipe 1; the described fracture texture of getting the protective casing 3 that sodium pipe 1 stretches into is that throat diameter is the Venturi tube 11 of 50mm, and has the mesopore 12 of 4 20mm around it.The aperture of described import orifice plate 5 is 45mm.Reduce the absolute altitude of getting sodium pipe 1.Described vertical openings of returning sodium pipe 2 outlet connections 8 is blind dead, and the aperture 9 that to open a diameter at the blind plate center be 6mm returns the sodium pipe 2 sides lateral aperture 10 that circumferentially to open 16 diameters equably be 10mm what be higher than blind plate 5～7mm simultaneously; Increase the orifice plate of a 40mm in protective casing 4 exits of returning sodium pipe 2; Described out-pile pipeline 6 is a bimetallic tube.
Form annular space owing to get sodium pipe 1 with protective casing 3; its liquid level is lower than the liquid level of getting in the sodium pipe 1 when normal operation; when double takes place in out-pile pipeline 6; sodium liquid flows out in a large number from getting sodium pipe 1; cause the sodium flow velocity in the protective casing 3 to increase sharply; increase with resistance; make the annular space liquid level drop to the fracture absolute altitude rapidly; air cavity gas flows out from fracture; pressure descends rapidly, like this, causes the sodium stream at import orifice plate 5 places to reduce; thereby end the further leakage of sodium, play the safeguard protection effect of siphon destructive.
Claims (4)
1. siphon destroying device, comprise that getting the sodium pipe is connected with ebullator by the out-pile pipeline, the other end of ebullator is connected with time sodium pipe by the out-pile pipeline, get the sodium pipe, return the sodium pipe and be fixed on the division board, extend into respectively in interior two protective casings of heap, the import orifice plate is positioned at the lower end of getting the protective casing that the sodium pipe stretches into, it is characterized in that, the described fracture texture of getting the protective casing that the sodium pipe stretches into is a Venturi tube, and has 4 mesopores around it, and described median pore diameter is 20mm; The aperture of described import orifice plate is 45mm; Reduce the absolute altitude of getting the sodium pipe.
2. siphon destroying device according to claim 1, it is characterized in that, the vertical openings of the outlet connection of described time sodium pipe is blind dead, the aperture that to open a diameter at the blind plate center be 6mm, circumferentially to open 16 diameters equably be the 10mm lateral aperture in the sodium pipe side of returning that is higher than blind plate 5～7mm simultaneously.
3. siphon destroying device according to claim 1 is characterized in that, described Venturi tube throat diameter is 50mm.
4. siphon destroying device according to claim 1 is characterized in that, described out-pile pipeline is a bimetallic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100870086A CN101266843B (en) | 2007-03-14 | 2007-03-14 | Siphon breaking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100870086A CN101266843B (en) | 2007-03-14 | 2007-03-14 | Siphon breaking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101266843A CN101266843A (en) | 2008-09-17 |
| CN101266843B true CN101266843B (en) | 2011-01-12 |
Family
ID=39989160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100870086A Active CN101266843B (en) | 2007-03-14 | 2007-03-14 | Siphon breaking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101266843B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3784443A (en) * | 1970-08-07 | 1974-01-08 | Commissariat Energie Atomique | Device for the leak-tight assembly of heat exchangers in nuclear reactors |
| US5263066A (en) * | 1991-11-06 | 1993-11-16 | Commissariat A L'energie Atomique | Nuclear reactor equipped with a core catcher |
-
2007
- 2007-03-14 CN CN2007100870086A patent/CN101266843B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3784443A (en) * | 1970-08-07 | 1974-01-08 | Commissariat Energie Atomique | Device for the leak-tight assembly of heat exchangers in nuclear reactors |
| US5263066A (en) * | 1991-11-06 | 1993-11-16 | Commissariat A L'energie Atomique | Nuclear reactor equipped with a core catcher |
Non-Patent Citations (3)
| Title |
|---|
| JP特开平8-146174A 1996.06.07 |
| JP特开平8-285974A 1996.11.01 |
| 张东辉.中国实验快堆一次钠泄漏防御的改进及其效果分析.核动力工程.2008,(8),282－285. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101266843A (en) | 2008-09-17 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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