CN105788691A - Cleaning device of damaged fuel assembly - Google Patents
Cleaning device of damaged fuel assembly Download PDFInfo
- Publication number
- CN105788691A CN105788691A CN201610051976.0A CN201610051976A CN105788691A CN 105788691 A CN105788691 A CN 105788691A CN 201610051976 A CN201610051976 A CN 201610051976A CN 105788691 A CN105788691 A CN 105788691A
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- China
- Prior art keywords
- fuel assembly
- damaged fuel
- rinser
- cylinder
- sodium
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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
- G21F9/28—Treating solids
- G21F9/30—Processing
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention relates to a removal device of radioactive contamination, aims to solve the problem of removing sticky sodium in a damaged fuel assembly of a sodium-cooled fast neutron reactor in China and provides a cleaning device of the damaged fuel assembly. The cleaning device of the damaged fuel assembly comprises an outer cylinder, an inner cylinder, a partition plate, an overflowing pipe, a breathing pipe and a hanging cylinder; the inner cylinder is partitioned by the partition plate into two parts, the upper portion is a cleaning chamber, and the lower portion is an overflowing chamber; the hanging cylinder is located on the upper portion of the cleaning chamber and is in a funnel shape. The cleaning device of the damaged fuel assembly is reasonable in structure design and convenient and fast to operate, it is guaranteed that a cleaning agent and the sticky sodium react normally while efficient removal of a reaction product is achieved, and the utilization rate of the cleaning agent is greatly raised. By means of the cleaning device, the problem of removing sticky sodium in the damaged fuel assembly of the sodium-cooled fast neutron reactor in China is solved, sticky sodium cleaning efficiency is high, the removal effect is good, and the principle of minimization of radioactive waste is well satisfied.
Description
Technical field
The present invention relates to a kind of alpha-contamination removal device, particularly to the rinser of a kind of damaged fuel assembly.
Background technology
The cold fast neutron reactor of sodium, as the term suggests, it is a kind of adopt metallic sodium as the nuclear reactor of coolant, it has good development prospect due to intrinsic multiple excellent specific property.In the cold fast neutron reactor of sodium, some reactor component can contact with metallic sodium, such as fuel assembly, sodium pipeline etc., therefore when these part replacement, the sodium to adhering on its surface is needed to be purged, to guarantee the safety of the processes such as later stage transport, process.
For the general viscous sodium parts that radioactive level is not high, it may be considered that it is carried out water cleaning so that the sodium of adhesion reacts with water, thus reaching to remove purpose.But, for damaged fuel assembly, a certain amount of high put material owing to can discharge after its breakage so that it is itself be subject to high-caliber radioactive pollution.In this case, if still adopting the mode that water cleans except sodium, then can produce substantial amounts of height and put waste water, seriously run counter to radwaste minimization principle；Meanwhile, sodium and water reaction can produce substantial amounts of heat, make the cut of breakage increase further, therefore, it is difficult to accepted by this area.
For the removing of the viscous sodium of the cold fast neutron reactor parts of sodium, still there is part document that it has been carried out disclosure in various degree both at home and abroad.But, for the removing of the viscous sodium of damaged fuel assembly, so far there are no to disclosed pertinent literature.The stage is developed rapidly, therefore for guarantee being smoothed out of the cold fast neutron reactor research work of sodium, it is achieved the safe storage of damaged fuel assembly, it is necessary to design a kind of applicable rinser owing to current China is in the cold fast neutron reactor technology of sodium.
Summary of the invention
For solving the removing problem of the viscous sodium of China's cold fast neutron reactor damaged fuel assembly of sodium, the invention provides the rinser of a kind of damaged fuel assembly.
The rinser of this damaged fuel assembly includes urceolus, inner core, dividing plate, overflow pipe, air tube and hangs cylinder；Described urceolus and inner core are the cylinder of bottom end closure；Described inner core is placed in outer barrel, and inner core is divided into two parts by described dividing plate, and top is purge chamber, and bottom is overflow chamber；Described overflow pipe is positioned at purge chamber, and overflow pipe upper end open, lower end is connected with overflow chamber；Described air tube is positioned at purge chamber, air tube upper end open, and opening higher than overflow pipe upper end open, and lower end is connected with overflow chamber；The described cylinder that hangs is positioned at purge chamber's internal upper part, hangs the both ends open up and down of cylinder, and its upper shed is more than under shed, in infundibulate, hangs a upper open end and is provided with pivot flange.
Described urceolus and inner core are preferably cylinder.
It is preferred for being provided with the fixing device for fixed weir pipe and air tube in described purge chamber, in case overflow pipe and air tube are damaged under stress effect.
Described fixing device is preferably locating ring.
Described locating ring can be more than 2.
It is preferred for being provided with lifting draw-in groove near the inwall upper limb of described inner core.
It is preferred that the described upper limb hanging cylinder is provided with hanger.
Described air tube and overflow pipe all can be many.
The outside of described urceolus is preferred equipped with electric heater.
Described electric heater outside employing heat-insulation layer is preferred.
The rinser of the damaged fuel assembly of the present invention adopts motlten metal plumbous as abluent, in cleaning process, the lead in sodium and the purge chamber adhered on the cold fast neutron reactor damaged fuel assembly of sodium cleaned is needed to react generation alloy, thus the high-efficient cleaning realizing the viscous sodium of damaged fuel assembly removes.Lead cooling curing after the reaction in the alloy generated due to reaction and purge chamber, therefore, it is possible to be well closed in wherein by radioactive substance, therefore avoids the diffusion of radioactive substance.The damaged gap place of the damaged fuel assembly after cleaning can adhere to lead, can be good at closing these gaps after plumbous cooling curing, effectively prevent radioactive substance and is discharged into external environment condition by damaged gap.
In the rinser of the damaged fuel assembly of the present invention, urceolus acts primarily as protective effect, it is prevented that the radioactive substance that inner core accident breakage causes leaks；Air tube is for balancing overflow room and outside air pressure, it is ensured that flooding process is normally carried out；The use hanging cylinder makes inserting of damaged fuel assembly more accurate, simple operation.
In sum, the rinser reasonable in design of the damaged fuel assembly of the present invention, simple operation, while guaranteeing abluent and viscous sodium normal reaction, it is achieved that the high-efficient cleaning of product removes, greatly improve the utilization rate of abluent.This device solves the removing problem of the viscous sodium of the cold fast neutron reactor damaged fuel assembly of China's sodium, and the elimination efficiency of viscous sodium is high, and elimination effect is good, meets radwaste minimization principle preferably.
Accompanying drawing explanation
The rinser schematic diagram of the damaged fuel assembly of Fig. 1 present invention.
Accompanying drawing labelling: 1. urceolus, 2. inner core, 3. dividing plate, 4. overflow pipe, 5. air tube, 6. hangs cylinder, 7. purge chamber, 8. overflow chamber, 9. pivot flange, 10. fixing device, 11. lifting draw-in grooves, 12. hangers.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
Embodiment 1
As shown in Figure 1, the rinser of the damaged fuel assembly of the present invention includes urceolus 1, inner core 2, dividing plate 3, overflow pipe 4, air tube 5 and hangs cylinder 6；Described urceolus 1 and inner core 2 are the cylinder of bottom end closure；It is internal that described inner core 2 is placed in urceolus 1, and inner core 2 is divided into two parts by described dividing plate 3, and top is purge chamber 7, and bottom is overflow chamber 8；Described overflow pipe 4 is positioned at purge chamber 7, and overflow pipe 4 upper end open, lower end is connected with overflow chamber 8；Described air tube 5 is positioned at purge chamber 7, air tube 5 upper end open, and opening higher than overflow pipe 4 upper end open, and lower end is connected with overflow chamber 8；The described cylinder 6 that hangs is positioned at purge chamber 7 internal upper part, hangs the both ends open up and down of cylinder 6, and its upper shed is more than under shed, in infundibulate, hangs cylinder 6 upper open end and is provided with pivot flange 9.
The fixing device 10 for fixed weir pipe 4 and air tube 5 can be adopted in described purge chamber 7；Lifting draw-in groove 11 can be provided with near the inwall upper limb of described inner core 2；The described upper limb hanging cylinder 6 can be provided with hanger 12.
Embodiment 2
The damaged fuel assembly of the cold fast neutron reactor of certain sodium is carried out by the rinser adopting the damaged fuel assembly of embodiment 1, and its basic process is as follows:
(1) adding appropriate metallic lead to inner core 2, heating makes plumbous fusing；
(2) damaged fuel assembly is hung in inner core 2 purge chamber 7 by hanging cylinder 6 central authorities, make damaged fuel assembly immerse in melted lead；The sodium adhered on damaged fuel assembly reacts generation alloy gradually with the lead in purge chamber 7, and the entry material of fusing is flowed into overflow chamber 8 by overflow pipe 4；
(3) after reaction terminates, damaged fuel assembly is sling by inner core 2, stop heating, complete to clean.
Claims (10)
1. the rinser of a damaged fuel assembly, it is characterised in that: the rinser of this damaged fuel assembly includes urceolus, inner core, dividing plate, overflow pipe, air tube and hangs cylinder；Described urceolus and inner core are the cylinder of bottom end closure；Described inner core is placed in outer barrel, and inner core is divided into two parts by described dividing plate, and top is purge chamber, and bottom is overflow chamber；Described overflow pipe is positioned at purge chamber, and overflow pipe upper end open, lower end is connected with overflow chamber；Described air tube is positioned at purge chamber, air tube upper end open, and opening higher than overflow pipe upper end open, and lower end is connected with overflow chamber；The described cylinder that hangs is positioned at purge chamber's internal upper part, hangs the both ends open up and down of cylinder, and its upper shed is more than under shed, in infundibulate, hangs a upper open end and is provided with pivot flange.
2. the rinser of damaged fuel assembly as claimed in claim 1, it is characterised in that: described urceolus and inner core are cylinder.
3. the rinser of damaged fuel assembly as claimed in claim 1, it is characterised in that: it is provided with the fixing device for fixed weir pipe and air tube in described purge chamber.
4. the rinser of damaged fuel assembly as claimed in claim 3, it is characterised in that: described fixing device is locating ring.
5. the rinser of damaged fuel assembly as claimed in claim 4, it is characterised in that: described locating ring is more than 2.
6. the rinser of damaged fuel assembly as claimed in claim 1, it is characterised in that: it is provided with lifting draw-in groove near the inwall upper limb of described inner core.
7. the rinser of damaged fuel assembly as claimed in claim 1, it is characterised in that: described in hang the upper limb of cylinder and be provided with hanger.
8. the rinser of damaged fuel assembly as claimed in claim 1, it is characterised in that: described air tube and overflow pipe are many.
9. the rinser of damaged fuel assembly as claimed in claim 1, it is characterised in that: the outside of described urceolus is equipped with electric heater.
10. the rinser of damaged fuel assembly as claimed in claim 1, it is characterised in that: described electric heater is outside adopts heat-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610051976.0A CN105788691B (en) | 2016-01-26 | 2016-01-26 | A kind of cleaning device of damaged fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610051976.0A CN105788691B (en) | 2016-01-26 | 2016-01-26 | A kind of cleaning device of damaged fuel assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105788691A true CN105788691A (en) | 2016-07-20 |
| CN105788691B CN105788691B (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610051976.0A Active CN105788691B (en) | 2016-01-26 | 2016-01-26 | A kind of cleaning device of damaged fuel assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN105788691B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051957A (en) * | 2017-04-14 | 2017-08-18 | 中国原子能科学研究院 | It is a kind of to remove the method that sodium is glued on damaged irradiated fuel assembly surface |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671878A (en) * | 2011-03-10 | 2012-09-19 | 中国原子能科学研究院 | Fast reactor spent component cleaning device |
| CN202584751U (en) * | 2012-05-28 | 2012-12-05 | 中国原子能科学研究院 | Sodium removal device for sodium-cooled fast reactor fuel component |
| CN103100528A (en) * | 2013-02-06 | 2013-05-15 | 中国原子能科学研究院 | Process and system of cleaning and removing sodium |
| CN205334980U (en) * | 2016-01-26 | 2016-06-22 | 中国原子能科学研究院 | Damaged fuel assembly's belt cleaning device |
-
2016
- 2016-01-26 CN CN201610051976.0A patent/CN105788691B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102671878A (en) * | 2011-03-10 | 2012-09-19 | 中国原子能科学研究院 | Fast reactor spent component cleaning device |
| CN202584751U (en) * | 2012-05-28 | 2012-12-05 | 中国原子能科学研究院 | Sodium removal device for sodium-cooled fast reactor fuel component |
| CN103100528A (en) * | 2013-02-06 | 2013-05-15 | 中国原子能科学研究院 | Process and system of cleaning and removing sodium |
| CN205334980U (en) * | 2016-01-26 | 2016-06-22 | 中国原子能科学研究院 | Damaged fuel assembly's belt cleaning device |
Non-Patent Citations (1)
| Title |
|---|
| 洪顺章: "《中国实验快堆系列丛书 钠工艺基础 》", 30 April 2011, 中国原子能出版传媒有限公司 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051957A (en) * | 2017-04-14 | 2017-08-18 | 中国原子能科学研究院 | It is a kind of to remove the method that sodium is glued on damaged irradiated fuel assembly surface |
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| Publication number | Publication date |
|---|---|
| CN105788691B (en) | 2018-04-20 |
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