CN1735705A - Method for the production of a semi-finished product made of zirconium alloy for the production of a flat product and use thereof - Google Patents
Method for the production of a semi-finished product made of zirconium alloy for the production of a flat product and use thereof Download PDFInfo
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- CN1735705A CN1735705A CNA200480002113XA CN200480002113A CN1735705A CN 1735705 A CN1735705 A CN 1735705A CN A200480002113X A CNA200480002113X A CN A200480002113XA CN 200480002113 A CN200480002113 A CN 200480002113A CN 1735705 A CN1735705 A CN 1735705A
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- zirconium alloy
- flat product
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C16/00—Alloys based on zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/186—High-melting or refractory metals or alloys based thereon of zirconium or alloys based thereon
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- Forging (AREA)
Abstract
A large ingot is produced by casting the zirconium alloy, then the ingot is forged to obtain the semi-finished product wherein the semi-finished product can be a slab for production of a flat product is produced from the large cast ingot in a single forging operation at a temperature at which the zirconium alloy is in a state comprising both the crystalline alpha and beta phases of the alloy.
Description
The present invention relates to make the half-finished production method of zirconium alloy that flat product is used, this flat product is used to make fuel assembly component.
(for example using light-water refrigerative nuclear reactor, pressurized water reactor (PWR) and boiling water reactor (BWR)) in the fuel stack piece installing or the fuel stack piece installing of CANDU reactor comprise the element that contains zirconium alloy, this zirconium alloy has the low neutron absorptive character at the nuclear reactor centre portions.
Under the situation of PWR type used by nuclear reactor assembly, the plate that the grille of the coated tube of fuel stick and the piece installing of manufacturing fuel stack is used can be made by zirconium alloy, described zirconium alloy especially comprises the zirconium alloy of tin and iron, for example alloy Zircaloy2 or Zircaloy4.
The parallelepiped-shaped case of BWR reactor fuel assembly also is by making such as the flat product of the such zirconium alloy of Zircaloy2 or Zircaloy4 usually.
Other alloy, the alloy that is called M5 as the commodity that mainly comprise zirconium and niobium also is used to produce fuel assembly component flat or the tubular products form.
Usually, the zirconium alloy that is used to produce fuel assembly component comprises the zirconium of at least 97 weight %, and all the other of 3 weight % are formed except owing to the impurity that alloy production is drawn, can comprise various different elements, especially iron, tin or niobium at the most.
The zirconium alloy that meets these conditions relevant with its composition according to temperature with and process heat treated different present one or another kind of form in two kinds of homoatomic xenocryst forms of zirconium, be the α phase, it is the zirconium phase with cryostatic stabilization of fine and close hexagonal structure; Perhaps β phase, it is the high-temperature stable phase with cubic structure.
In some temperature range or when some processing finished, zirconium alloy such as being used to make the industrial alloy of fuel assembly element as defined above, can have blended alpha+beta structure.
The flat product of zirconium alloy normally is shaped by many hot and colds in succession and heat treatment step is produced.
Raw produce normally is set to the very large ingot that the alloy of required composition obtains by casting.Normally being cast into diameter for example is that 400-800mm and length are the ingot of 2-3m.Described ingot carries out forging operation subsequently in a temperature range, in this temperature range, it can be α, β or alpha+beta phase (EP-0.085.552 and US-5,674,330).
Preferably, described ingot is heated, so that alloy is in the β phase, then the heating ingot that is in the β phase is carried out first and forges step.Usually, before forging, described ingot be heated to 1050 ℃ ten hours.
After first forged step, the product that obtains by this forging began to quench from β mutually.
Carry out second under 800 ℃ the temperature and forge step being lower than then, under the situation of Zircaloy type alloy, this alloy is in the α phase.After second forged step, the product that is obtained (it has constituted the work in-process of the method that is used to produce flat product) was the slab that can have about 100mm thickness.
Subsequently this slab is carried out various hot rolling and cold rolling manipulation, to obtain final flat product, for example thickness is the band of 0.2-4mm.Quenching and annealed thermal treatment are carrying out between some shaping operation at least at final flat product.
The method of converting of just having described comprise many in succession the treatment stage, especially from the quenching several times of β phase, to obtain work in-process, as hot formed slab, perhaps second intermediates of cold shaping.
During the cooling step of product or during the quenching step, zirconium alloy product contacts with damp atmosphere and/or water, and like this, it absorbs hydrogen, and described hydrogen is fixed in the material with the form of hydride.
Usually, the hydride that exists with big precipitate form in material is disadvantageous for the cold-workable property and the erosion resistance of product.
Hydride is separated out in 220-100 ℃ temperature range in product cooling period usually, and the hydrogen of absorbed is many more, and the amount that hydride forms is big more, and hydride is big more.
Because therefore the formation of hydride or promote that preferential formation of hydride of tiny form is favourable in the limiting material preferably carry out the conversion process of zirconium alloy product so that these products be shaped and heat treatment operation during absorb minimum hydrogen as far as possible.
In addition, advantageously can be with complicated and comprise that the manufacturing process of many consecutive operations simplifies.
French Patent 2,334,763 proposed a kind of under 830-950 ℃ temperature thermal treatment and/or thermodynamics handle the method that comprises greater than the zirconium alloy of 150ppm carbon, to be dissolved to small part carbon, do not carry out any thermal treatment being higher than under 950 ℃ the temperature subsequently.
Thermal treatment in 830-950 ℃ temperature range (having α and β temperature range mutually in corresponding to alloy) and/or thermodynamics are handled the first forging step of the ingot that only is being in the β phase and are then carried out after quenching-in water.
Patent 2,334,763 method only is suitable for the zirconium alloy of particular type, and can not change the fs of products production, quenches in water in this stage.And the production phase after the thermal treatment of alpha+beta phase or thermodynamics are handled can not carry out being higher than under 950 ℃ the temperature.
The method of above-mentioned patent thereby aspect its application and the gained result relevant, be restricted with the hydride that exists in the finished product.
The objective of the invention is to propose a kind of half-finished production method of zirconium alloy that comprises at least 97 weight % zirconiums, these work in-process are used to make flat product, in the method, come production large size ingot by the casting zirconium alloy, produce the work in-process that are used for through hot rolling cold rolling manipulation acquisition subsequently flat product by forging described large size ingot then, quenching and annealed thermal treatment are added at least between some shaping operation, wherein said method makes the production simplification of described product and reduces cost, and with the amount of existing hydride be limited in one low-level, the existence of described hydride has injurious effects for the plasticity-and the erosion resistance of zirconium alloy product.
, be at zirconium alloy under the temperature of state of the α that comprises zirconium alloy and β crystallization phases for this reason, produce work in-process by the large size ingot casting by single forging operation.
According to specific forms:
-under this forging temperature, described ingot comprises the α phase zirconium alloy of 10-90% volume ratio, all the other zirconium alloys of described ingot are β phases;
-work in-process are slabs;
The thickness of-described slab is about 100mm, and is used to produce the flat product that thickness is 0.2-4mm;
-under 850 ℃-950 ℃ temperature, carry out α and β mutually zirconium alloy forge;
-this zirconium alloy comprises the total interpolation element of 3 weight % at the most, and described interpolation element comprises at least a element in element tin, iron, chromium, nickel, oxygen, niobium, vanadium and the silicon, and this alloy rest part is made up of zirconium except unavoidable impurities.
The invention still further relates to the purposes that described method is used to produce slab, described slab is used to produce the flat product that thickness is 0.2-4mm, this flat product is used to make such as the grille of the PWR reactor fuel assembly nuclear fuel assembly element with the fuel stack vanning wall of plate or BWR reactor, the perhaps fuel assembly component of CANDU reactor.
In order to understand the present invention, prior art and the half-finished production method that is used to produce flat product of the present invention are described in contrast.
Fig. 1 has schematically shown each step of prior art production method.
Fig. 2 and Fig. 1 are similar, have schematically shown to be used to produce half-finished production method of the present invention.
Fig. 1 shows ingot casting 1, and it can be the large size ingot casting, and its diameter can be that 400-800mm and length are 2m-3m, and it is to cast by the zirconium alloy that will be used to manufacture the flat product that fuel assembly component uses to obtain.
This zirconium alloy for example can be the Zircaloy2 alloy, described Zircaloy2 alloy comprises, by weight, 1.2-1.7% tin, 0.07-0.20% iron, 0.05-0.15% chromium, 0.03-0.08% nickel, 120ppm silicon and 150ppm carbon at the most, this alloy rest part is made up of zirconium except the impurity of routine.
The alloy that is used to make flat product also can be the Zircaloy4 alloy, described Zircaloy4 alloy comprises, by weight, 1.2-1.7% tin, 0.18-0.24% iron, 0.07-0.13% chromium, 150ppm carbon at the most, this alloy rest part is made up of zirconium and impurity.
Described alloy is cast into the form of large size ingot 1, described ingot is reached be higher than 1000 ℃ temperature, for example 1050 ℃ ten hours so that the alloy of described ingot is in β cube of phase of high temperatures fully.
Shown in the step 2 among Fig. 1, described ingot casting forges under the temperature in the β of alloy phase scope (for example near 1000 ℃ temperature) subsequently, and form is the quite thick flat product that is known as slab.
As shown by the arrow of this production method third step 4 of expression, thick slab 3 quenches in water or in the malaria subsequently.
In Fig. 1,, forge under the temperature (for example about 800 ℃ temperature) of thick slab 3 in the α of zirconium alloy phase scope by in the 4th step shown in 5.
Obtained constituting the slab 3 that half-finished thickness is about 100mm by forging like this, and its through hot rolling then cold-rolling treatment obtain the sheet material that thickness can be 0.2-4mm or the final flat product of ribbon form.
In the initial forging (step 2 of this method) of the ingot 1 of the β phase (step 4) of this method of must quenching mutually at β afterwards, because the refrigerative metal can be included in the outside area of alpha+beta phase in forging process, thereby cause α to generate the formation of the segregation of (alphagene) element (as tin and oxygen) and β generation (b ê tagene) element (as iron, chromium, nickel or niobium), this depends on element contained in the alloy.
These segregations have disadvantageous effect to the use properties of alloy, particularly erosion resistance and stampability.
Quenching mutually at β needs slab 3 to contact with the quenching environment that is made of water or damp atmosphere (being hydrogenous environment).
Hydrogen is absorbed when slab is heat-treated, and is fixed on the inside of alloy with the form of hydride.
Thereby the crystallized ability of zirconium alloy flat product and erosion resistance have been subjected to infringement.
Fig. 2 has described the production method of the present invention of making the slab that flat product uses.
The large size ingot casting 1 of zirconium alloy carries out single forging operation 7 mutually at alpha+beta, and obtaining to be substantially similar to the slab 8 of slab 3, this slab 3 begins mutually to quench and forges mutually at α by the forging mutually at β of complexity, from β and obtains.
The inventive method thereby comprise that utilization replaces first three step 2,4 and 5 of art methods in the single forging operation 7 of alpha+beta phase, promptly in the mutually forged step 2 of β (being higher than 1000 ℃), be the step 4 of quenching from the relative slab 3 ' of β afterwards and forge mutually at the α that is lower than under 800 ℃ the temperature, in addition in described single forging step 7, for example under the situation of alloy Zircaloy2 and 4, under 850-950 ℃ temperature, for example under about 900 ℃ temperature, forge.
The selection of alpha+beta phase forging temperature will make that the volume ratio of α phase is 10-90% in the described ingot alloy, and the rest part of this alloy is the β phase.
Forge described ingot 1 and obtain the half-finished slab 8 of formation that thickness can be about 100mm, described work in-process will carry out as heat treated quenching and annealing steps therebetween through aforesaid hot rolling and cold rolling manipulation.
By the flat product of analyzing work in-process 8 or obtaining, can see that the amount of contained hydride obviously is less than the amount of hydride contained in the prior art products in the alloy by the inventive method acquisition by these work in-process.
When using alpha+beta to forge first three step that replaces in the prior art production method mutually, the hydrogen richness of the work in-process of mensuration (being slab under the situation of producing flat product) hangs down twice under than the situation of art methods.
The hydride of separating out in common also the flat product of the size of the hydride of separating out in the product of the present invention less than prior art.
The erosion resistance of the flat product that the work in-process that obtained by the inventive method are made and plasticity-thereby obviously be better than relevant nature by the resulting product of art methods.
These advantages are owing to the slab that forges acquisition by β is not mutually carried out quench hot with beat all the possibility of result.
In fact, utilize hydrogenous quenchant that slab 3 ' is carried out this quench hot and cause product to absorb hydrogen, and therefore form hydride.
In addition, one of advantage of the inventive method is to have simplified the work in-process production method significantly.The cost and the time of implementing this method have obviously been reduced thus.
In addition, only make this product reach α and the β temperature in the scope mutually, promptly be starkly lower than the temperature that in art methods, keeps mutually at β.
Under the situation of Zircaloy2 that as above provides its composition and Zircaloy4 alloy, in 850-950 ℃ temperature range, for example under 900 ℃, carry out in the forging of the ingot 1 of alpha+beta phase.
Under the situation of Zircaloy2 and Zircaloy4 alloy or stanniferous other any alloy, the alpha+beta that is converted to alloy for the forging step of implementing the inventive method is met and is caused forming the tin segregation.
But this segregation can be inhibited by the processing of carrying out in by the process of the final flat product of work in-process production subsequently.
Be applied under the situation of niobium alloy (wherein in the transformation between mutually of α and alpha+beta near 600 ℃) in the inventive method, can be starkly lower than 900 ℃ in the forging temperature of alpha+beta phase, but will consider the forging property of alloy under this forging temperature simultaneously.
Can consider the inventive method is applied to other zirconium alloy except that Zircaloy or niobium alloy.These alloys generally include the interpolation element of 3 weight % at the most, and described interpolation element comprises at least a in element tin, iron, chromium, nickel, oxygen, niobium, vanadium and the silicon, and this alloy rest part is made up of zirconium and unavoidable impurities.
The present invention is specially adapted to produce the zirconium alloy flat product, and this flat product is used to make such as the grille of the PWR type nuclear reactor assembly fuel assembly component with the assembling tank wall of plate or BWR reactor, the perhaps fuel assembly component of CANDU reactor.
The present invention is not strictly limited to described embodiment.
The composition that depends on zirconium alloy in the forging temperature of alpha+beta phase.Can use be used for art methods α mutually or the mutually forged conventional equipment of β or be applicable to that carrying out alpha+beta at single operation forges mutually with other device that obtains slab and carry out forging operation.
The present invention is applicable to any industrial zirconium alloy product that the composition ultimate value that provides is above limited usually.
Claims
(according to the modification of the 19th of treaty)
1. comprise half-finished production method that the zirconium alloy of at least 97 weight % zirconiums is made, these work in-process are used to make flat product, in the method, producing diameter by the casting zirconium alloy is that 400-800mm and length are the ingot of 2-3m, then by forge described ingot production be used for through hot rolling subsequently cold rolling manipulation to obtain thickness be the work in-process that the thickness of the flat product of 0.2-4mm is about the slab form of 100mm, it is characterized in that, be at zirconium alloy under the temperature of state of the α that comprises zirconium alloy and β crystallization phases, produce slab (8) by ingot (1) by single forging operation.
2. the method for claim 1 is characterized in that, under this forging temperature, described ingot comprises the α phase zirconium alloy of 10-90% volume ratio, and all the other zirconium alloys of described ingot are β phases.
3. claim 1 or 2 method is characterized in that, under 850 ℃-950 ℃ temperature, carry out α and β mutually zirconium alloy forge.
4. each method among the claim 1-3, it is characterized in that, this zirconium alloy comprises the total interpolation element of 3 weight % at the most, described interpolation element comprises at least a element in element tin, iron, chromium, nickel, oxygen, niobium, vanadium and the silicon, and this alloy rest part is made up of zirconium except unavoidable impurities.
5. the purposes that each method is used to produce slab among the claim 1-4, described slab is used to produce the flat product that thickness is 0.2-4mm, this flat product is used to make such as the grille of the PWR reactor fuel assembly nuclear fuel assembly element with the fuel stack vanning wall of plate or BWR reactor, the perhaps fuel assembly component of CANDU reactor.
Claims (7)
1. comprise half-finished production method that the zirconium alloy of at least 97 weight % zirconiums is made, these work in-process are used to make flat product, in the method, come production large size ingot by the casting zirconium alloy, produce the work in-process that are used for through hot rolling cold rolling manipulation acquisition subsequently flat product by forging described large size ingot then, quenching and annealed thermal treatment are added at least between some shaping operation, it is characterized in that, be at zirconium alloy under the temperature of state of the α that comprises zirconium alloy and β crystallization phases, produce work in-process (8) by large size ingot casting (1) by single forging operation.
2. the method for claim 1 is characterized in that, under this forging temperature, described ingot comprises the α phase zirconium alloy of 10-90% volume ratio, and all the other zirconium alloys of described ingot are β phases.
3. claim 1 or 2 method is characterized in that these work in-process are slab (8).
4. the method for claim 3 is characterized in that, the thickness of described slab (8) is about 100mm, and is used to produce the flat product that thickness is 0.2-4mm.
5. each method among the claim 1-4 is characterized in that, carries out α and β zirconium alloy forging mutually under 850 ℃-950 ℃ temperature.
6. each method among the claim 1-5, it is characterized in that, this zirconium alloy comprises the total interpolation element of 3 weight % at the most, described interpolation element comprises at least a element in element tin, iron, chromium, nickel, oxygen, niobium, vanadium and the silicon, and this alloy rest part is made up of zirconium except unavoidable impurities.
7. the purposes that each method is used to produce slab among the claim 1-6, described slab is used to produce the flat product that thickness is 0.2-4mm, this flat product is used to make such as the grille of the PWR reactor fuel assembly nuclear fuel assembly element with the fuel stack vanning wall of plate or BWR reactor, the perhaps fuel assembly component of CANDU reactor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0300316A FR2849865B1 (en) | 2003-01-13 | 2003-01-13 | PROCESS FOR THE PRODUCTION OF A ZIRCONIUM ALLOY PRODUCT FOR THE PRODUCTION OF A FLAT PRODUCT AND USE THEREOF |
| FR0300316 | 2003-01-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1735705A true CN1735705A (en) | 2006-02-15 |
| CN100529148C CN100529148C (en) | 2009-08-19 |
Family
ID=32524867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200480002113XA Expired - Fee Related CN100529148C (en) | 2003-01-13 | 2004-01-09 | Method for the production of a semi-finished product made of zirconium alloy for the production of a flat product and use thereof |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20060081313A1 (en) |
| EP (1) | EP1585841A1 (en) |
| JP (1) | JP2006520430A (en) |
| KR (1) | KR20050090456A (en) |
| CN (1) | CN100529148C (en) |
| FR (1) | FR2849865B1 (en) |
| RU (1) | RU2337177C2 (en) |
| WO (1) | WO2004072318A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8116422B2 (en) * | 2005-12-29 | 2012-02-14 | General Electric Company | LWR flow channel with reduced susceptibility to deformation and control blade interference under exposure to neutron radiation and corrosion fields |
| JP2014077152A (en) * | 2012-10-09 | 2014-05-01 | Tohoku Univ | Zr ALLOY AND ITS MANUFACTURING METHOD |
| CN104919068A (en) * | 2013-01-11 | 2015-09-16 | 阿海珐核能公司 | Treatment process for a zirconium alloy, zirconium alloy resulting from this process and parts of nuclear reactors made of this alloy |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3645800A (en) * | 1965-12-17 | 1972-02-29 | Westinghouse Electric Corp | Method for producing wrought zirconium alloys |
| FR2334763A1 (en) * | 1975-12-12 | 1977-07-08 | Ugine Aciers | PROCESS FOR IMPROVING THE HOT RESISTANCE OF ZIRCONIUM AND ITS ALLOYS |
| CA1214978A (en) * | 1982-01-29 | 1986-12-09 | Samuel G. Mcdonald | Zirconium alloy products and fabrication processes |
| ZA8383B (en) * | 1982-01-29 | 1983-12-28 | Westinghouse Electric Corp | High energy beam thermal processing of alpha zirconium alloys and the resulting articles |
| JPH059688A (en) * | 1991-07-06 | 1993-01-19 | Kobe Steel Ltd | Manufacture of zr alloy rolled stock excellent in workability |
| FR2723965B1 (en) * | 1994-08-30 | 1997-01-24 | Cezus Co Europ Zirconium | PROCESS FOR THE MANUFACTURE OF ZIRCONIUM ALLOY SHEETS WITH GOOD RESISTANCE TO NODULAR CORROSION AND DEFORMATION UNDER IRRADIATION |
| US5844959A (en) * | 1997-08-01 | 1998-12-01 | Siemens Power Corporation | Zirconium niobium tin alloys for nuclear fuel rods and structural parts for high burnup |
| US5854818A (en) * | 1997-08-28 | 1998-12-29 | Siemens Power Corporation | Zirconium tin iron alloys for nuclear fuel rods and structural parts for high burnup |
| FR2801323B1 (en) * | 1999-11-23 | 2002-02-01 | Cezus Cie Europ Du Zirconium | ZIRCONIUM ALLOY WITH HIGH RESISTANCE TO CORROSION AND HYDRURATION BY WATER AND WATER VAPOR AND METHOD OF THERMOMECHANICAL TRANSFORMATION OF THE ALLOY |
| KR100441562B1 (en) * | 2001-05-07 | 2004-07-23 | 한국수력원자력 주식회사 | Nuclear fuel cladding tube of zirconium alloys having excellent corrosion resistance and mechanical properties and process for manufacturing thereof |
| FR2849866B1 (en) * | 2003-01-13 | 2006-01-13 | Cezus Co Europ Zirconium | PROCESS FOR PRODUCING A ZIRCONIUM ALLOY PRODUCT FOR PRODUCING A LONG PRODUCT AND USE THEREOF |
| FR2858332B1 (en) * | 2003-07-31 | 2005-10-28 | Cezus Co Europ Zirconium | METHOD FOR MANUFACTURING A ZIRCONIUM ALLOY FLAT PRODUCT, FLAT PRODUCT THUS OBTAINED, AND COMPONENT FUEL ASSEMBLY ELEMENT FOR NUCLEAR POWER PLANT REACTOR PRODUCED FROM THE FLAT PRODUCT |
| FR2860803B1 (en) * | 2003-10-08 | 2006-01-06 | Cezus Co Europ Zirconium | PROCESS FOR PRODUCING A ZIRCONIUM ALLOY FLAT PRODUCT, FLAT PRODUCT THUS OBTAINED, AND NUCLEAR POWER PLANT REACTOR GRADE REALIZED FROM THE FLAT PRODUCT |
| FR2874119B1 (en) * | 2004-08-04 | 2006-11-03 | Framatome Anp Sas | METHOD FOR MANUFACTURING A FUEL SINK TUBE FOR A NUCLEAR REACTOR, AND A TUBE THUS OBTAINED |
-
2003
- 2003-01-13 FR FR0300316A patent/FR2849865B1/en not_active Expired - Fee Related
-
2004
- 2004-01-09 EP EP04701028A patent/EP1585841A1/en not_active Withdrawn
- 2004-01-09 RU RU2005125715/02A patent/RU2337177C2/en not_active IP Right Cessation
- 2004-01-09 US US10/541,262 patent/US20060081313A1/en not_active Abandoned
- 2004-01-09 WO PCT/FR2004/000036 patent/WO2004072318A1/en active Application Filing
- 2004-01-09 CN CNB200480002113XA patent/CN100529148C/en not_active Expired - Fee Related
- 2004-01-09 KR KR1020057012999A patent/KR20050090456A/en not_active Application Discontinuation
- 2004-01-09 JP JP2006502091A patent/JP2006520430A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN100529148C (en) | 2009-08-19 |
| RU2337177C2 (en) | 2008-10-27 |
| FR2849865B1 (en) | 2006-01-21 |
| EP1585841A1 (en) | 2005-10-19 |
| WO2004072318B1 (en) | 2004-10-28 |
| KR20050090456A (en) | 2005-09-13 |
| WO2004072318A1 (en) | 2004-08-26 |
| RU2005125715A (en) | 2006-02-10 |
| JP2006520430A (en) | 2006-09-07 |
| FR2849865A1 (en) | 2004-07-16 |
| US20060081313A1 (en) | 2006-04-20 |
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