CN108305694A - A kind of burst disc replacement technique for liquid metal sodium environment - Google Patents
A kind of burst disc replacement technique for liquid metal sodium environment Download PDFInfo
- Publication number
- CN108305694A CN108305694A CN201711389125.8A CN201711389125A CN108305694A CN 108305694 A CN108305694 A CN 108305694A CN 201711389125 A CN201711389125 A CN 201711389125A CN 108305694 A CN108305694 A CN 108305694A
- Authority
- CN
- China
- Prior art keywords
- rupture disk
- sodium
- liquid metal
- disc replacement
- burst disc
- 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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Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
- G21C9/004—Pressure suppression
- G21C9/008—Pressure suppression by rupture-discs or -diaphragms
-
- 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)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The present invention relates to a kind of burst disc replacement techniques for liquid metal sodium environment, during demolition blasting piece, argon gas are filled with into system pipeline to keep bleed outlet micro-positive pressure, it is ensured that air does not enter in system pipeline；It removes rupture disk surface and glues sodium, and the rupture disk, bolt, nut of dismounting are placed in paraffin oil drum；New rupture disk is installed and checks air-tightness, after passed examination, recovery system function.The present invention glues the particular surroundings of sodium for the argon atmosphere and equipment of sodium-cooled fast reactor steam generator accident protection system, realizes the normal updating maintenance of rupture disk equipment, ensure that the operational safety of sodium-cooled fast reactor.
Description
Technical field
The invention belongs to the equipment replacement technologies of sodium-cooled fast reactor, and in particular to a kind of explosion for liquid metal sodium environment
Piece Replacement procedure.
Background technology
China Experiment Fast Reactor (CEFR) is Chinese First sodium-cooled fast reactor, and on July 21st, 2010 is critical, July 21 in 2011
Day realizes 40% Power operation, successfully realizes 100% Power operation 72 hours on December 28th, 2015.China Experiment Fast Reactor (with
Lower abbreviation CEFR) steam generator accident protection system is for protecting the ad hoc of steam generator and secondary circuit main cooling system
Safety measure.Blasting piece device is the important equipment of steam generator accident protection system, and major function is to work as steam generation
Device occur big sodium-water reaction when, system pressure steeply rises, by be arranged blasting piece device, can rapid pressure release, avoid thing
Therefore further expand, protect the safety of steam generator and secondary circuit.
Blasting piece device structure is vertical vessel, is made of external cylinder, protective cover, interior cylinder, rupture disk, rupture disk
With interior cylinder flanged joint, external cylinder and steam generator accident protection system connectivity, interior cylinder and secondary circuit master
Cooling system is connected to.Applying argon gas is protective gas in steam generator accident protection system.Since blasting piece device is safe phase
Close important equipment, it is desirable that regularly replaced within every 4 years, and due to residing for it argon atmosphere and equipment glue the particular surroundings of sodium,
It needs to carry out particular study to its Replacement procedure.
Invention content
It is an object of the invention to be directed to sodium-cooled fast reactor steam generator accident protection system, one kind is provided and is used for
The burst disc replacement technique of liquid metal sodium environment realizes the normal updating maintenance of equipment, ensures the operational safety of sodium-cooled fast reactor.
A kind of burst disc replacement technique for liquid metal sodium environment includes the following steps：
(1) in the case of device powers down, the protective cover head cover of demolition blasting sheet devices, while being filled with into system pipeline
Argon gas is to keep bleed outlet micro-positive pressure, it is ensured that air does not enter in system pipeline；
(2) it removes rupture disk surface with tool and glues sodium, demolition blasting piece fastening bolt removes rupture disk, and by bolt, spiral shell
Female and rupture disk is placed in paraffin oil drum；
(3) new rupture disk is installed, and checks air-tightness；
(4) the protective cover head cover of blasting piece device is installed, and checks air-tightness；
(5) after passed examination, recovery system function.
Further, it is used for the burst disc replacement technique of liquid metal sodium environment as described above, wherein into system pipeline
The argon pressure being filled with is 3kPa.
Further, it is used for the burst disc replacement technique of liquid metal sodium environment as described above, wherein entirely replace explosion
In the operating process of piece, maintenance personal uses Mobile long-pipe lung ventilator, wears breathing mask and works；Setting special messenger is pacifying
Entire area control gas cylinder, observation gas cylinder tolerance simultaneously more renew gas cylinder in time.
Further, two groups of gas cylinders of the using and the reserved are arranged in air compression station, monitor storage pressure value by special messenger, work as pressure value
When reaching alarming value, switch another group of gas cylinder immediately, and the gas cylinder being finished is re-replaced.
Beneficial effects of the present invention are as follows：The present invention in the demolishing process of rupture disk by viscous sodium equipment carry out except sodium and specially
Door storage, prevents the generation of radiocontamination and sodium fire；Argon gas conduct is filled in system pipeline in the replacement process of rupture disk
Protective gas, and micro-positive pressure is kept, it prevents liquid metal sodium from reacting with air, impurity is avoided to generate；Maintenance personal wears
Breathing mask, breathing mask are connect with gas station with soft tracheae is lengthened, and staff can reach designated position, and are mitigated negative
Weight.
c
Description of the drawings
Fig. 1 is flow chart of the method for the present invention.
Specific implementation mode
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
Due to the flowing of secondary circuit main cooling system high temperature Sodium vapour, rupture disk meeting adhesiving metal sodium, in tearing open for rupture disk
Except in the process, first rupture disk surface should be removed with tool and glue sodium, and be stored in preprepared paraffin oil cylinder.It was removing
Cheng Zhong, part bolt, nut and rupture disk can all glue sodium, should all be positioned in paraffin oil drum, prevent radiocontamination and sodium fire
Occur.
It during replacing rupture disk, needs to open blasting piece device protective cover, after opening protective cover
System and air communication, since equipment pipe has the presence of liquid metal sodium, in order to ensure that liquid metal sodium does not occur with air
Effect, and generates impurity, and argon gas is filled with as protection gas in pipe-line system planted agent, and in pipeline argon gas should keep it is micro- just
Pressure, it is ensured that air does not enter in system pipeline, and in operating process of uncapping, may be to protective cover if argon pressure is excessive
It is impacted, people and equipment is caused to damage, by experiment, argon pressure 3KPa is the pressure value for meeting requirements above.
The entire work for replacing rupture disk is in argon atmosphere, and maintenance personal must wear breathing mask.Maintenance work uses
Mobile long-pipe lung ventilator, maintenance personal only wear breathing mask, and setting special messenger controls gas cylinder in safety zone, observes gas cylinder gas
It measures and simultaneously more renews gas cylinder in time, ensure that maintenance personal is long-term, safety in operation area work.
Air compression station is made of two groups, 4 gas cylinders, the using and the reserved, is responsible for the pressure of control monitoring pressure gauge by monitor
Value, when pressure value reaches alarming value, switches another group of gas cylinder, and will be finished gas cylinder and replace, has met work people immediately
The condition of member's long-term work.Operating personnel wear breathing mask, and breathing mask is connect with gas station with soft tracheae is lengthened, and work people
Member can reach designated position, and mitigate heavy burden.
As shown in Figure 1, the burst disc replacement technique of the present invention includes following technical process：
(1) in the case of device powers down, equipment surface insulating layer and electric heating wire are first removed, then by bottle gouard moved by hands with
The protective cover head cover of blasting piece device connects, and removes bolt, slings protective cover head cover, and block bleed outlet；Simultaneously to system pipes
Argon gas is filled in road to keep bleed outlet micro-positive pressure, it is ensured that air does not enter in system pipeline.
(2) it removes rupture disk surface with tool and glues sodium, demolition blasting piece fastening bolt simultaneously removes rupture disk, by bolt, spiral shell
Female and rupture disk is placed in paraffin oil drum；At this point, system should be kept to be filled with argon gas protective gas, maintain bleed outlet micro- just
Pressure.
(3) new rupture disk is installed, torque spanner is used in combination to be fastened by Tightening moment, B05 systems pressurize two hours, inspection
Look into the leakproofness of rupture disk.
(4) the protective cover head cover of blasting piece device is installed, B08 systems pressurize two hours checks blasting piece device head cover
Leakproofness.
(5) after passed examination, isolation, recovery system function are released.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.If in this way, belonging to the model of the claims in the present invention and its equivalent technology to these modifications and changes of the present invention
Within enclosing, then the present invention is also intended to include these modifications and variations.
Claims (4)
1. a kind of burst disc replacement technique for liquid metal sodium environment includes the following steps：
(1) in the case of device powers down, the protective cover head cover of demolition blasting sheet devices, while argon gas is filled with into system pipeline
To keep bleed outlet micro-positive pressure, it is ensured that air does not enter in system pipeline；
(2) remove rupture disk surface with tool and glue sodium, demolition blasting piece fastening bolt removes rupture disk, and by bolt, nut and
Rupture disk is placed in paraffin oil drum；
(3) new rupture disk is installed, and checks air-tightness；
(4) the protective cover head cover of blasting piece device is installed, and checks air-tightness；
(5) after passed examination, recovery system function.
2. being used for the burst disc replacement technique of liquid metal sodium environment as described in claim 1, it is characterised in that：To system pipes
The argon pressure being filled in road is 3kPa.
3. being used for the burst disc replacement technique of liquid metal sodium environment as described in claim 1, it is characterised in that：It is entire to replace
In the operating process of rupture disk, maintenance personal uses Mobile long-pipe lung ventilator, wears breathing mask and works；Special messenger is set
Gas cylinder is controlled in safety zone, observation gas cylinder tolerance simultaneously more renews gas cylinder in time.
4. being used for the burst disc replacement technique of liquid metal sodium environment as claimed in claim 3, it is characterised in that：Compressed air
It stands and two groups of gas cylinders of the using and the reserved is set, monitor storage pressure value by special messenger switches another immediately when pressure value reaches alarming value
Group gas cylinder, and the gas cylinder being finished is re-replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389125.8A CN108305694A (en) | 2017-12-20 | 2017-12-20 | A kind of burst disc replacement technique for liquid metal sodium environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389125.8A CN108305694A (en) | 2017-12-20 | 2017-12-20 | A kind of burst disc replacement technique for liquid metal sodium environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108305694A true CN108305694A (en) | 2018-07-20 |
Family
ID=62870268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711389125.8A Pending CN108305694A (en) | 2017-12-20 | 2017-12-20 | A kind of burst disc replacement technique for liquid metal sodium environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108305694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681685A (en) * | 2019-01-09 | 2019-04-26 | 中国原子能科学研究院 | A kind of rupture disk protective device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174479A (en) * | 2007-12-11 | 2008-05-07 | 中国原子能科学研究院 | Sodium-cooled fast reactor argon gas distribution system |
| KR20090120053A (en) * | 2008-05-19 | 2009-11-24 | 이주아 | Method for detecting a leak of pipe arrangement and repairing system |
| CN104338719A (en) * | 2014-09-12 | 2015-02-11 | 内蒙古兰太实业股份有限公司 | Liquid sodium metal ISO storage tank cleaning process |
| CN107091348A (en) * | 2017-05-05 | 2017-08-25 | 北京首都机场动力能源有限公司 | A kind of fluid-tight Safety relief valve |
-
2017
- 2017-12-20 CN CN201711389125.8A patent/CN108305694A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174479A (en) * | 2007-12-11 | 2008-05-07 | 中国原子能科学研究院 | Sodium-cooled fast reactor argon gas distribution system |
| KR20090120053A (en) * | 2008-05-19 | 2009-11-24 | 이주아 | Method for detecting a leak of pipe arrangement and repairing system |
| CN104338719A (en) * | 2014-09-12 | 2015-02-11 | 内蒙古兰太实业股份有限公司 | Liquid sodium metal ISO storage tank cleaning process |
| CN107091348A (en) * | 2017-05-05 | 2017-08-25 | 北京首都机场动力能源有限公司 | A kind of fluid-tight Safety relief valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681685A (en) * | 2019-01-09 | 2019-04-26 | 中国原子能科学研究院 | A kind of rupture disk protective device |
| CN109681685B (en) * | 2019-01-09 | 2023-09-29 | 中国原子能科学研究院 | Rupture disk protection device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180720 |
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| RJ01 | Rejection of invention patent application after publication |