CN1102269A - The discharger of pebble bed high temperature reactor fuel element - Google Patents
The discharger of pebble bed high temperature reactor fuel element Download PDFInfo
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- CN1102269A CN1102269A CN 93119442 CN93119442D CN1102269A CN 1102269 A CN1102269 A CN 1102269A CN 93119442 CN93119442 CN 93119442 CN 93119442 D CN93119442 D CN 93119442D CN 1102269 A CN1102269 A CN 1102269A
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- 239000003758 nuclear fuel Substances 0.000 title abstract description 7
- 230000008439 repair process Effects 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims abstract description 4
- 239000000446 fuel Substances 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 238000010926 purge Methods 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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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- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The present invention is the discharger of pebble bed high temperature reactor fuel element.It is an actuating medium with reactor coolant gas or Purge gas, produces certain energy pulses air-flow by pulse air flow generator, destroys the ball bridge of hopper bottom funnel exit, makes ball lean on the discharge of single-rowization of gravity.This device links to each other with hopper ball bed has only air pulse pipeline and vollyball pipeline, the mechanical moving element that need dismantle and keep in repair not, pulse air flow generator and auxiliary Pneumatic component are installed in outside the reactor vessel, change and maintenance extremely convenient.The present invention can also be applied on the regular shape material particles air-transport system.
Description
The invention belongs to the reactor field, relate in particular to the discharger of pebble bed high temperature reactor fuel element.
On present pebble bed high temperature reactor fuel handling system, be burster or single device with the equipment that reactor core bottom discharge duct directly links to each other.The AVR experimental reactor of Germany and THTR-300 prototype reactor are respectively to adopt burster and single device.The execution unit of burster is a rotary disk identical with the discharge duct diameter on the AVR loading and unloading material system, have a vollyball mouth to the edge from disk central authorities, can there be four balls to discharge simultaneously, be drained in groups in groups in the storage bulb of single device front φ 200mm internal diameter, and then discharge through single device simplification.The characteristics of this burster are good reliabilitys, are difficult for stuckly, but rotary disk is bearing the very big pressure of goalpost in the discharge duct.Driving torque is big, and has increased a set of equipment.
German patent specification CN1042620A has described a kind of fuel element and has discharged device, this device has one and is positioned at vent pipe below the reactor core hanging basket, that open downwards, the rotatable orifice plate of fuel sphere case that is arranged on vent pipe below and one and fuel element adjacency is installed broken bulb spacer in the orifice plate side.Last single device of THTRL-300 and also similar this kind structure of broken bulb spacer.Characteristics of this device are between the exit portion of vent pipe and orifice plate and a barrier rim are arranged that ball can not flow out when dismounting and assembling orifice plate on the fuel sphere base plate; Another characteristics are to have gas nozzle to feed ball case bottom, and air-flow blows element loose, like this.Element does not almost have frictionally and flows out through the edge, goes forward side by side into the opening of orifice plate.
Above the execution unit of described two kinds of equipment be the mechanical part of motion, its transmission shaft must adopt the shaft seal structure of " all-sealed ", must shutdown when dismounting and maintenance, pressure release.
The present invention aims to provide a kind of single-row discharger of novelty, this discharger has a tool pulse air flow generator, so that the ball bridge of destruction hopper bottom funnel exit, make the discharge of single-rowization of ball, the moving mechanical part that need not keep in repair in the ball bed does not need in shutdown, pressure release and the emptying reactor core fuel sphere just can change, keep in repair the outer relevant parts of pressure vessel.
Principal feature of the present invention is:
In the break-in hopper ball bed of core unloading pipe lower end, the mechanical moving element that need dismantle and keep in repair only is not fixed with air pulse pipeline and vollyball pipeline, and pulse air flow generator and auxiliary Pneumatic component all are installed in outside the reactor vessel.Utilize pulse air flow generator to produce and have certain energy pulses air-flow, destroy the ball bridge of vollyball funnel exit, make the single-row discharge of ball, and a distance is provided with a taper embedded body above hopper outlet, making ball produce secondary puts up a bridge, act on stiction between the pressure of funnel exit and ball with minimizing, improve and the ball rate.After the ball of single-rowization discharge sub-elects broken ball by broken bulb spacer, handle, one by one ball is transported to reactor core (being discharge duct in this device) by lifter at last, thereby realize the circulation of ball through simplification (adopting single device to make the ball simplification in this device).
Device of the present invention is made up of discharge duct, hopper, vollyball funnel, taper embedded body, pulse air flow generator, air pulse pipeline, reduction valve, solenoid valve, single device, lifter, counter, control system.Utilize the impulsive force of air pulse, destroy funnel exit ball bridge, make the single-row discharge of ball.It is characterized in that:
In discharge duct lower end break-in place one hopper (or claiming the discharging hopper) is set, the hopper bottom is provided with the funnel of an asymmetry, the funnel exit bottom is installed vollyball pipeline and air pulse pipeline simultaneously, the air pulse pipeline other end links to each other with the pulse air flow generator outlet, and compressed air piping is connected with the pulse air flow generator inlet tube by stop valve, reduction valve and solenoid valve.The vollyball pipe other end is connected with single device inlet tube, and single device outlet is connected with lifter.Before and after lifter, counter is installed respectively with the pipe upper end of losing.Rapid escape valve is installed in the pulse air flow generator, open rapidly by the solenoid control rapid escape valve, pressure gas in the gas tank is discharged suddenly, and the instantaneous impact of generation has destroyed the ball bridge of funnel exit, thereby makes fuel sphere realize successfully that at vollyball Guan Zhongneng single-rowization flows.Simultaneously,, reduce the stiction between fuel sphere, and improve and the ball rate, a taper embedded body is set above funnel, make fuel sphere secondary scaffolding between embedding human body bottom margin and hopper walls in order to reduce the pressure that fuel sphere acts on funnel exit.Air pulse by the pulse air flow generator generation, destroyed the ball bridge of funnel exit, the fuel sphere that is impacted can clash into the ball of secondary scaffolding again, after making that the funnel exit fuel sphere is discharged, the ball of secondary scaffolding is followed by discharge, after some, and the scaffolding again at this two place, thereby make the flow disruption of fuel sphere in the funnel, stop vollyball.The mechanical moving element that in fuel sphere ball bed, need not dismantle and keep in repair.
Design proposal of the present invention is:
The discharge duct that links to each other with reactor core has enough big diameter (500mm), the bridging phenomenon occurs with the ball that prevents diameter 60mm in pipe.In theory, the discharge duct diameter only need be greater than 5 times of fuel sphere diameter, and ball just the bridging phenomenon can not occur in pipe.The discharge duct lower end is after break-in, and in the outlet hopper, the ball bed remains certain altitude.The hopper walls of outlet hopper bottom is designed to asymmetry, helps flowing of ball.The hopper outlet diameter is less than two times of bulb diameter, and ball can be not stuck in the exit, only allows a ball by outlet, guarantees the discharge of single-rowization of ball.Embedded body is a cone, hollow, and distance is 1.5 bulb diameters between bottom margin and the hopper walls, makes ball be easy to herein put up a bridge.Pulse air flow generator gas tank capacity is 50 liters, and the pressure gas working pressure is 0.1MPa, and pipeline shortens as far as possible between rapid escape valve and the solenoid valve, moves rapidly to guarantee the rapid escape valve piston.Fuel sphere is through the single-row discharge of vollyball pipe, and by after the single device simplification, sends into lifter one by one and send.Single device by speed reduction unit by motor driven.Electromagnetism-gas-driving valve control pressure gas promotes the piston back-and-forth movement of lifter, thereby finishes the process of transmitting of ball.The logic control of whole loading and unloading material system and the counting of ball are realized by three counters.
Description of drawings: Fig. 1 is the synoptic diagram of apparatus of the present invention
[1] discharge duct [2] hopper [3] taper embedded body
[4] funnel [5] air pulse pipeline [6] pulse air flow generator
[7] rapid escape valve [8] solenoid valve [9] reduction valve
[10] the single device of single-row vollyball pipe [11] [12] lifter
[13] pipe [14] gas tank [15] solenoid directional control valve of losing
[16] roots blower [17] air compressor [18] valve
[19] valve [20] counter [21] counter
[22] the little funnel of counter [23]
Advantage of the present invention is:
1. the vollyball parts that touch with the lower end hopper of reactor core discharging pipe ball bench grafting are on-mechanical Moving component need not dismantled and be keeped in repair.
2. pulse air flow generator and assisted gas dynamic component are installed in the reactor vessel place, can In the situation of not shutdown, not pressure release, not emptying fuel ball, change and maintenance the utmost point It is convenient.
3. pulse air flow generator work pressure is low, and consumption tolerance is few.
4. simple in structure, the vollyball smoothness.
5. except can be applicable to the pebble bed high temperature reactor fuel handling system, also can promote Be applied on the regular shape material particles air-transport system.
Embodiment:
This device is according to the equipment size design of the high temperature gas-cooled experimental reactor fuel handling system of the 10MW of Tsing-Hua University.Cold conditions simulated experiment stand helps the single-row vollyball device of stream, simulated experiment ball, single device, lifter, the pipe of losing, photoelectric counter, bypass valve, air compressor, roots blower and PC control system to form by discharge duct, the broken bridge of air pulse.Cyclic test through about 100,000 balls shows that this device security of operation, reliable can be used on the high temperature gas-cooled experimental reactor loading and unloading material system of 10MW fully.
Claims (2)
1. a kind of fuel element of high temperature gas cooled reactor is discharged circulating device, form by discharge duct, hopper, pulse air flow generator, single device, lifter, lose pipe, counter etc., it is characterized in that, this New-type fuel element discharger is to utilize pulse air flow generator to produce certain energy pulses air-flow, destroy funnel exit ball bridge, make it single-rowization discharge:
A. connect little funnel [23] under the funnel exit of discharge duct [1] lower end hopper [2] bottom, air pulse pipeline [5] one ends and little hopper side walls are joined, the other end and pulse air flow generator [6] outlet joins, rapid escape valve [7] is installed in the generator, the rapid escape valve induction pipe joins with solenoid valve [8] and reduction valve [9] successively, little hopper outlet and single-row vollyball pipe [10] join, the vollyball pipe other end is order one device [11] and lifter [12] successively, pipe [13] lower end and the lifter outlet of losing is joined, and counter [20] [21] [22] is installed respectively on three positions;
B. funnel [4] top is equipped with the embedded body that causes ball secondary scaffolding apart from hopper walls a distance;
C. funnel [4] outlet diameter is less than 2 bulb diameters;
D. funnel [4] wall is a unsymmetric structure.
2 according to the described device of claim 1, it is characterized in that, has only fixing air pulse pipeline [5] and vollyball pipeline [10] in the hopper [2], and all the other parts that need keep in repair and change are installed in outside the reactor vessel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93119442A CN1056011C (en) | 1993-10-29 | 1993-10-29 | Discharging device for ball bed high temp. air cooling reactor element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1102269A true CN1102269A (en) | 1995-05-03 |
Family
ID=4992918
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93119442 Granted CN1102269A (en) | 1993-10-29 | 1993-10-29 | The discharger of pebble bed high temperature reactor fuel element |
| CN93119442A Expired - Fee Related CN1056011C (en) | 1993-10-29 | 1993-10-29 | Discharging device for ball bed high temp. air cooling reactor element |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93119442A Expired - Fee Related CN1056011C (en) | 1993-10-29 | 1993-10-29 | Discharging device for ball bed high temp. air cooling reactor element |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN1102269A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115148385A (en) * | 2022-07-14 | 2022-10-04 | 西安热工研究院有限公司 | Core unloading device and method for pebble-bed reactor |
| CN115775643A (en) * | 2022-11-29 | 2023-03-10 | 华能山东石岛湾核电有限公司 | Protection method and protection device for high-temperature reactor fuel element delivery system |
| CN116344086A (en) * | 2023-03-29 | 2023-06-27 | 华能山东石岛湾核电有限公司 | Reactor core feeding pipe blocking on-line treatment system and method of fuel loading and unloading system |
| CN117238546A (en) * | 2023-09-01 | 2023-12-15 | 华能核能技术研究院有限公司 | Reactive unloading control device of pebble-bed high-temperature gas cooled reactor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100483458C (en) * | 2006-06-15 | 2009-04-29 | 清华大学 | Two-way fuel ball counter circuit for sphere high temperature gas-cooling reactor |
| CN100452245C (en) * | 2006-10-08 | 2009-01-14 | 清华大学 | Mechanical cyclotron single-row device for breaking bridge |
| CN102623071B (en) * | 2012-03-21 | 2014-09-03 | 清华大学 | Device and method for recognizing fuel elements with different sizes in pebble bed high-temperature reactor |
-
1993
- 1993-10-29 CN CN 93119442 patent/CN1102269A/en active Granted
- 1993-10-29 CN CN93119442A patent/CN1056011C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115148385A (en) * | 2022-07-14 | 2022-10-04 | 西安热工研究院有限公司 | Core unloading device and method for pebble-bed reactor |
| CN115148385B (en) * | 2022-07-14 | 2024-05-07 | 西安热工研究院有限公司 | Discharging device and method for reactor core of pebble-bed reactor |
| CN115775643A (en) * | 2022-11-29 | 2023-03-10 | 华能山东石岛湾核电有限公司 | Protection method and protection device for high-temperature reactor fuel element delivery system |
| CN115775643B (en) * | 2022-11-29 | 2024-01-23 | 华能山东石岛湾核电有限公司 | Protection method and protection device for high-temperature pile fuel element conveying system |
| CN116344086A (en) * | 2023-03-29 | 2023-06-27 | 华能山东石岛湾核电有限公司 | Reactor core feeding pipe blocking on-line treatment system and method of fuel loading and unloading system |
| CN116344086B (en) * | 2023-03-29 | 2024-04-19 | 华能山东石岛湾核电有限公司 | Reactor core feeding pipe blocking on-line treatment system and method of fuel loading and unloading system |
| CN117238546A (en) * | 2023-09-01 | 2023-12-15 | 华能核能技术研究院有限公司 | Reactive unloading control device of pebble-bed high-temperature gas cooled reactor |
| CN117238546B (en) * | 2023-09-01 | 2024-06-18 | 华能核能技术研究院有限公司 | Reactive unloading control device of pebble-bed high-temperature gas cooled reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1090673A (en) | 1994-08-10 |
| CN1056011C (en) | 2000-08-30 |
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| CF01 | Termination of patent right due to non-payment of annual fee |