CN105931691B - Nuclear Power Station's Exhausted Fuels radgas processing method - Google Patents
Nuclear Power Station's Exhausted Fuels radgas processing method Download PDFInfo
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- CN105931691B CN105931691B CN201610255277.8A CN201610255277A CN105931691B CN 105931691 B CN105931691 B CN 105931691B CN 201610255277 A CN201610255277 A CN 201610255277A CN 105931691 B CN105931691 B CN 105931691B
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- radgas
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- shipping container
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
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- High Energy & Nuclear Physics (AREA)
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Abstract
The invention discloses a kind of Nuclear Power Station's Exhausted Fuels radgas processing method, comprise the following steps：S1, by inflation line the osculum of shipping container for loading spentnuclear fuel is connected with helium source of the gas；The ventilating system of the steam vent of the shipping container and nuclear power station is connected by exhausting loop；S2, helium source of the gas conveying helium is opened, the helium is entered in the shipping container by the inflation line, dilutes the radgas in the shipping container；The helium output pressure is no more than 0.1Mpa；S3, helium is persistently conveyed, the mixed gas of the helium in the shipping container and radgas is discharged from the steam vent, the ventilating system of nuclear power station is drained into by the exhausting loop.The present invention is used in spentnuclear fuel discharging, and detecting has the processing of radgas in shipping container, by the processing method by shipping container radgas safety dumping, ensure that irradiated fuel assembly safety in shipping container safety and shipping container.
Description
Technical field
The present invention relates to Nuclear Power Station's Exhausted Fuels processing technology field, more particularly to a kind of Nuclear Power Station's Exhausted Fuels radgas
Processing method.
Background technology
Spentnuclear fuel, also known as rradiated nuclear fuel, it is to live through radiation exposure, used nuclear fuel, typically by nuclear power station
Nuclear reactor produce.In nuclear power station, it is used to keep in spentnuclear fuel provided with Spent Fuel Pool, Spent Fuel Pool passes through the screen work that configures
Place spentnuclear fuel.And when Spent Fuel Pool is connect close to when completely holding, it is necessary to which spentnuclear fuel is transported into exclusive irradiated fuel store factory
Disposal is received, fresh fuel is received with the space bridge joint for vacating enough.Radgas Kr85Detection is right before spent fuel transport container discharging
Spentnuclear fuel has unabroken prerequisite condition in container.
In existing correlation technique, correlation technique there is no to solve spentnuclear fuel transhipment discharging and radgas Kr85Discharge is asked
Topic.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of nuclear power by shipping container radgas safety dumping
Stand spentnuclear fuel radgas processing method.
The technical solution adopted for the present invention to solve the technical problems is：A kind of Nuclear Power Station's Exhausted Fuels radgas is provided
Processing method, comprise the following steps：
S1, by inflation line the osculum of shipping container for loading spentnuclear fuel is connected with helium source of the gas；Pass through exhaust
Loop connects the ventilating system of the steam vent of the shipping container and nuclear power station；
S2, helium source of the gas conveying helium is opened, the helium is entered in the shipping container by the inflation line, dilute
Release the radgas in the shipping container；The helium output pressure is no more than 0.1Mpa；
S3, helium is persistently conveyed, make the mixed gas of helium in the shipping container and radgas from the row
Stomata is discharged, and the ventilating system of nuclear power station is drained into by the exhausting loop.
Preferably, in step S2, the helium enters lower end in the shipping container by the osculum so that described
Helium is full of the inner chamber of the shipping container from bottom to top in the shipping container.
Preferably, in step S2, by controlling the valve on the helium source outlet end, pressure gauge is coordinated to control helium
The output pressure of gas.
Preferably, in step S2, when opening helium source of the gas, by the slow opening portion of the valve on the helium source outlet end
Point；Core measurement is carried out to the ventilating system；
It is no more than 8.0E+4Bq/m in the core measurement Monitoring Data of the ventilating system3, helium output pressure is no more than
In the case of 0.1Mpa, the aperture of the valve is kept.
Preferably, in step S3, in addition to：During the mixed gas discharge, core measurement is carried out to the ventilating system,
Core measurement Monitoring Data is no more than 8.0E+4Bq/m3。
Preferably, in step S3, persistently helium is conveyed so that the mixed gas is persistently discharged, until core measurement monitoring number
According to the initial value returned back to before measuring.
Preferably, in step S1, Multifunctional bench is inflated into the exhaust joint on branch road and is connected to the shipping container
On osculum, the gas-charging connection on the inflation branch road is connected into helium source of the gas, the exhaust joint is connected with gas-charging connection
The inflation line is formed, the osculum is connected with helium source of the gas；
The exhausting loop is the exhausting loop on the Multifunctional bench.
Preferably, under the suction of the exhausting loop fan, mixed gas in the shipping container is along described
Exhausting loop is emitted into the ventilating system.
Preferably, the Nuclear Power Station's Exhausted Fuels radgas processing method is further comprising the steps of：
After the completion of S4, radgas discharge, water-filling draining is carried out to the shipping container.
Preferably, in step S4, before water-filling draining, first connect inert gas detector and the shipping container is put
Penetrating property gas detects；If there are radgas, repeat step S1-S3 in the shipping container.
The Nuclear Power Station's Exhausted Fuels radgas processing method of the present invention, in spentnuclear fuel discharging, detecting transport
There is the processing of radgas in container, by the processing method by shipping container radgas safety dumping, ensure that fortune
In defeated vessel safety and shipping container irradiated fuel assembly safety, for spentnuclear fuel transhipment everything goes well with your work implement lay a good foundation, ensure
The normal overhaul of nuclear power station unit station implement.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the attachment structure schematic diagram that shipping container is exhausted in the present invention.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now compares accompanying drawing and describe in detail
The embodiment of the present invention.
The Nuclear Power Station's Exhausted Fuels radgas processing method of one embodiment of the invention, for transporting discharging in spentnuclear fuel field
When, detecting in shipping container has radgas Kr85The processing of (krypton).With reference to Fig. 1, this method may include following steps：
S1, by inflation line 30 will load spentnuclear fuel shipping container 10 osculum and (such as helium of helium source of the gas 20
Bottle) connection；The ventilating system of the steam vent of shipping container 10 and nuclear power station is connected by exhausting loop 40.
S2, the conveying helium of helium source of the gas 20 is opened, helium is entered in shipping container 10 by inflation line 30, dilution transport
Radgas in container 10；Helium output pressure is no more than 0.1Mpa.
In step S2, helium enters lower end in shipping container 10 by osculum so that helium is in shipping container 10
The inner chamber of shipping container 10 is full of from bottom to top.By controlling the valve 21 on helium source outlet end, coordinate pressure gauge 22
Control the output pressure of helium.
In step S2, when opening helium source of the gas 20, the valve 21 on the port of export of helium source of the gas 20 is slowly opened into part (such as
Open 15 degree)；After a period of time (such as 10 minutes), core measurement is carried out to ventilating system.Monitoring is measured in the core of ventilating system
Data are no more than 8.0E+4Bq/m3, helium output pressure be no more than 0.1Mpa in the case of, keep valve 21 aperture.
S3, helium is persistently conveyed, the mixed gas of the helium in shipping container 10 and radgas is arranged from steam vent
Go out, the ventilating system of nuclear power station is drained into by exhausting loop 40.
Wherein, it then follows low discharge discharges principle, and radgas is discharged into shipping container 10.
Step S3 also includes：During mixed gas is discharged, core measurement is carried out to ventilating system, core measurement Monitoring Data is not
More than 8.0E+4Bq/m3.When more than 8.0E+4Bq/m3When, pass through the tune for controlling helium output pressure to discharge radgas
Section, by core measurement Monitoring Data control in 8.0E+4Bq/m3It is interior.
In step S3, persistently helium is conveyed so that mixed gas is persistently discharged, until core measurement Monitoring Data returns back to survey
Initial value before amount.
As a kind of embodiment, processing method of the invention can be using Multifunctional bench connection transportation container 10 come real
Now inflation exhaust, by the radgas safety dumping of shipping container 10.
Specifically, Multifunctional bench is inflated into the exhaust joint on branch road to be connected on the osculum of shipping container 10, will
The gas-charging connection connection helium source of the gas 20 on branch road is inflated, exhaust joint is connected to form inflation line 30 with gas-charging connection.Row
Air circuit 40 can be realized by exhausting loop on Multifunctional bench, therefore by exhausting loop on Multifunctional bench by shipping container
10 and ventilating system connect, realize exhaust.
Open helium source of the gas 20 and convey helium, helium is entered in shipping container 10 along branch road is inflated by osculum, dilute
Release the radgas in shipping container 10.
On Multifunctional bench, exhausting loop 40 is provided with moisture trap and high efficiency particulate air filter, is arranged on mixed gas edge
When air circuit 40 drains into ventilating system, moisture trap and high efficiency particulate air filter preferably do not start, and pass through only for mixed gas.
Further, the Nuclear Power Station's Exhausted Fuels radgas processing method is further comprising the steps of：
After the completion of S4, radgas discharge, water-filling draining is carried out to shipping container 10.
In step S4, before water-filling draining, inert gas detector (NGM209 in-line meters) is first connected to shipping container
10 carry out radgas detection；If there are radgas, repeat step S1-S3 in shipping container 10.
Water-filling draining is carried out to shipping container 10, can equally be realized by Multifunctional bench.Pass through filling for Multifunctional bench
Shipping container is connected by water branch road, draining branch road with water filling source and discharge system, is run with water-filling discharging mode, and transport is held
Device 10 carries out water-filling draining.
The irradiated fuel assembly loaded in shipping container 10 is cooled by water-filling draining, it is convenient subsequently to spentnuclear fuel group
Part carries out discharging operations, and irradiated fuel assembly is taken out out of shipping container 10.
By processing of the above method to radgas, spent fuel transport container radgas safety dumping is protected
The safety of irradiated fuel assembly has been demonstrate,proved, has laid a good foundation and accumulates for subsequent transportation container water-filling exhaust/cooling circulation and container unloading
Experience is tired out, has been that everything goes well with your work implements to lay a good foundation for spentnuclear fuel transhipment in nuclear power station, ensures that the normal overhaul of nuclear power station unit station is real
Apply.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of Nuclear Power Station's Exhausted Fuels radgas processing method, it is characterised in that comprise the following steps：
S1, by inflation line the osculum of shipping container for loading spentnuclear fuel is connected with helium source of the gas；Pass through exhausting loop
The ventilating system of the steam vent of the shipping container and nuclear power station is connected；
S2, helium source of the gas conveying helium is opened, the helium is entered in the shipping container by the inflation line, dilutes institute
State the radgas in shipping container；The helium output pressure is no more than 0.1Mpa；
S3, helium is persistently conveyed, make the mixed gas of helium in the shipping container and radgas from the steam vent
Discharge, the ventilating system of nuclear power station is drained into by the exhausting loop.
2. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 1, it is characterised in that in step S2,
The helium enters lower end in the shipping container by the osculum so that the helium is in the shipping container under
And the upper inner chamber full of the shipping container.
3. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 1, it is characterised in that in step S2,
By controlling the valve on the helium source outlet end, pressure gauge is coordinated to control the output pressure of helium.
4. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 1, it is characterised in that in step S2,
When opening helium source of the gas, the valve on the helium source outlet end is slowly opened into part；Core is carried out to the ventilating system
Measurement；
It is no more than 8.0E+4Bq/m in the core measurement Monitoring Data of the ventilating system3, helium output pressure is no more than 0.1Mpa
In the case of, keep the aperture of the valve.
5. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 1, it is characterised in that in step S3,
Also include：During the mixed gas discharge, core measurement is carried out to the ventilating system, core measurement Monitoring Data is no more than 8.0E
+4Bq/m3。
6. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 5, it is characterised in that in step S3,
Persistently helium is conveyed so that the mixed gas is persistently discharged, until the initial value that core measurement Monitoring Data is returned back to before measurement.
7. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 1, it is characterised in that in step S1,
Multifunctional bench is inflated into the exhaust joint on branch road to be connected on the osculum of the shipping container, by the inflation branch road
Gas-charging connection connection helium source of the gas, the exhaust joint is connected to form the inflation line with gas-charging connection, by the row
Water hole is connected with helium source of the gas；
The exhausting loop is the exhausting loop on the Multifunctional bench.
8. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 7, it is characterised in that in the exhaust
Under the suction of loop fan, the mixed gas in the shipping container is emitted into the ventage along the exhausting loop
System.
9. the Nuclear Power Station's Exhausted Fuels radgas processing method according to claim any one of 1-8, it is characterised in that should
Nuclear Power Station's Exhausted Fuels radgas processing method is further comprising the steps of：
After the completion of S4, radgas discharge, water-filling draining is carried out to the shipping container.
10. Nuclear Power Station's Exhausted Fuels radgas processing method according to claim 9, it is characterised in that in step S4,
Before water-filling draining, first connect inert gas detector and radgas detection is carried out to the shipping container；If the transport
There is radgas in container, then repeat step S1-S3.
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| CN201610255277.8A CN105931691B (en) | 2016-04-21 | 2016-04-21 | Nuclear Power Station's Exhausted Fuels radgas processing method |
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| CN201610255277.8A CN105931691B (en) | 2016-04-21 | 2016-04-21 | Nuclear Power Station's Exhausted Fuels radgas processing method |
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| CN105931691A CN105931691A (en) | 2016-09-07 |
| CN105931691B true CN105931691B (en) | 2018-01-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482451B (en) * | 2016-09-23 | 2022-05-27 | 广东核电合营有限公司 | Vacuum drying and helium filling device for spent fuel storage and transportation container |
| CN107180661B (en) * | 2017-03-30 | 2019-02-22 | 中国核动力研究设计院 | A kind of spent fuel transport container residual heat removal facility |
| CN110619966B (en) * | 2019-09-16 | 2021-09-07 | 中广核工程有限公司 | Spent fuel assembly uncovering and retrieving system and method |
| CN113782242A (en) * | 2021-09-06 | 2021-12-10 | 哈尔滨工程大学 | Containment filtering and discharging device based on spent fuel pool |
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| CN1195419A (en) * | 1995-09-01 | 1998-10-07 | 西门子公司 | Device and method for inerting and venting atmosphere in containment vessel of nuclear-power station |
| CN201364745Y (en) * | 2008-12-24 | 2009-12-16 | 曹家强 | Radioactive gas purifying device |
| WO2015007409A1 (en) * | 2013-07-19 | 2015-01-22 | Areva Gmbh | Ventilation system and associated operating method for use during a serious incident in a nuclear plant |
| CN104541331A (en) * | 2012-08-01 | 2015-04-22 | 阿海珐有限公司 | Containment protection system for a nuclear facility and associated operating method |
| CN105513661A (en) * | 2016-01-15 | 2016-04-20 | 中国科学技术大学 | Cleaning waste gas pressure swing adsorption purification and recycling method and device for fusion reactor hot room |
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Patent Citations (5)
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|---|---|---|---|---|
| CN1195419A (en) * | 1995-09-01 | 1998-10-07 | 西门子公司 | Device and method for inerting and venting atmosphere in containment vessel of nuclear-power station |
| CN201364745Y (en) * | 2008-12-24 | 2009-12-16 | 曹家强 | Radioactive gas purifying device |
| CN104541331A (en) * | 2012-08-01 | 2015-04-22 | 阿海珐有限公司 | Containment protection system for a nuclear facility and associated operating method |
| WO2015007409A1 (en) * | 2013-07-19 | 2015-01-22 | Areva Gmbh | Ventilation system and associated operating method for use during a serious incident in a nuclear plant |
| CN105513661A (en) * | 2016-01-15 | 2016-04-20 | 中国科学技术大学 | Cleaning waste gas pressure swing adsorption purification and recycling method and device for fusion reactor hot room |
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| CN105931691A (en) | 2016-09-07 |
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