IE861851L - Absorber for nuclear radiations - Google Patents
Absorber for nuclear radiationsInfo
- Publication number
- IE861851L IE861851L IE861851A IE185186A IE861851L IE 861851 L IE861851 L IE 861851L IE 861851 A IE861851 A IE 861851A IE 185186 A IE185186 A IE 185186A IE 861851 L IE861851 L IE 861851L
- Authority
- IE
- Ireland
- Prior art keywords
- aluminium
- absorber
- absorber according
- gadolinium
- dispersed phase
- Prior art date
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 23
- 230000005855 radiation Effects 0.000 title claims abstract description 11
- 239000004411 aluminium Substances 0.000 claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910000748 Gd alloy Inorganic materials 0.000 claims abstract description 5
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 12
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 8
- 229910052796 boron Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052693 Europium Inorganic materials 0.000 claims description 4
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 4
- 239000006100 radiation absorber Substances 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005242 forging Methods 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- BEZBEMZKLAZARX-UHFFFAOYSA-N alumane;gadolinium Chemical compound [AlH3].[Gd] BEZBEMZKLAZARX-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000001640 fractional crystallisation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/08—Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Materials For Medical Uses (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
1. An absorber for nuclear radiations characterised in that it is formed by an alloy of gadolinium with an aluminium selected from the group comprising pure aluminium, alloyed aluminium and pure or alloyed aluminium containing a dispersed phase.
Description
58952 The present invention relates to an absorber for nuclear radiations™ With the development in nuclear processes, a great deal of research has been carried out on a world-wide basis, for the purpose 5 of devising arsSproduciog effective and competitive radiation absorbers™ To achieve that aim,,, the materials used for producing than must comply mth the follow-ing criteria: - they must have particular nuclear properties: a large effective capture section, a 1©^ level of secondary emission, and 10 good stability in respect of time with respect to the radiation; - thav must have a high melting point in order to withstand the heating effect generated by the absorption of radiation, in {articular neutron rays;; - they must be good conductors of heat in order to provide 15 for rapid removal of the heat generated; - they must have mechanical characteristics which permit them easily to be shapedj - they must resist corrosion in the atmosphere or in the working medium; and 20 - they must be of the lowest possible cost., Ainong all the materials used for absorbing neutrons f the most widely known are cadmiumP samarium, europium, boron and gadolinium.
Cadmium suffers from the disadvantage of being a highly toxic 25 substance and having a very low melting point v321°C) and a very lew hoil 'rrj point (765°C). Samarium and europium have given rise to pr&eti'eally no industrial development because of their excessively high cost. 15® most widespread among such materials is boron which is used in different forms: elementary borone, boridesf boron carbide, * boric acx<3.£ etc. Moreovere, a large number of patents have been filed an that subject.. However£, this material suffers frc® very 5 poor mechanical properties and it must be highly diluted in a metal matrix such as aluminium for example in order to acquire the qualities necessary for it to be able to assume the form required for each type of absorber. In that case however, its absorption capacity is greatly reduced and must be compensated by an increase 10 in the volume of material used? and thatP in shorte substantially increases the cost of the absorber, At any event,, boron being virtually insoluble in aluminium, the material obtained is a composite productj. and the production thereof makes it necessary to have recourse to highly complicated production processes if regular 15 distribution of the boron in the aluminium matrix is to be achieved and if heterogeneity in the absorption capacity is to be avoided.
Gadolinium and its oxide have already been used for a number of years new, in various nuclear installations in whiche, mixed with the fuel t, they perform the function of moderators. However t, the 20 application thereof to the production of radiation absorbers gives rise to problems„ As regards the oxide ^ which is generally available in powder fornix it must be mixed with other substances, v#hich involves the use of highly complicated technologies, and its very poor mechanical 25 properties make the use thereof for the production of absorbers of complex shape, both a delicate and an expensive matter,, In addition, this oxide suffers from a poor level of thermal conductivity and its absorption capacity is relatively low in comparison with that of elementary gadolinium. 30 As regards the metal itself, the cost hereof is still high and it is difficult to use because of its very high level of oxidizability. - 3 ~ However£. in the spectrum of slew neutrons, gadolinium has the highest effective capture section of all the known absorbers.
In particular £, in comparison with boron,, its section for thermal _*? neutrons of an energy level of 10 ~ eV is one hundred times 5 greater- As regards fast neutrons, its effectiveness in regard thereto is as good as that of boron.
It is for that reason that the present applicantsf being aware of the attraction of gadolinium bat also the disadvantages involved therewith, sought and discovered a %ray of making therefrom 10 attractive nuclear radiation absorbers.
The absorber is characterised in that it is formed by an alloy of gadolinium with an aluminium selected frcm the group comprising pure aluminiumt» allayed alisninium, and pare or alloyed aluminium containing a dispersed phase- 15 This therefore involves an alloy based on gadolinium and aluminium in which the proportion of gadolinium is between 0„0i>% and 70% by weight. Below a value of 0.05%4, the absorption effect is found to be excessively reduced while above a value of 70% s difficulties occur in regard to producing the alloy. Preferably, 20 the above - indicated range is between 0.1 and 15% and depends oo the nature and the flux of radiations to be absorbed, The aluminium used nsay be pore* whether it has bean refined by any method such as three-layer electrolysis or fractional crystallization or is simply such that it is collected at the 25 discharge of electrolysis tanks with its usual impurities such as iron and silicon.
However, the aluminium may also be a conventional alloy such as those denoted by numbers 1000 , 5000 and 6000 in the Aluminium 9 Association standards, which makes it-possible to enhance the ■ j, • mechanical properties of the absorbers produced., or alternatively an - 4 - 5 10 15 20 25 alloy of aluminium with at least one other metal feiiich also has absorbent qualities such as cadmium „ saneriumt, europium, lithium P hafniusn and tantalum^ which latter alloys may also be produced from alloy of types 1CC0,. 5000 ar/3 S0C0* In additiont, the aluminium which may or may rot be alloyed nay contain a dispersed phase such as carbon fibres or other fibres which are intended to enhance the mechanical strength of the absorbers or alternatively, whether combined with such fibres or nott. a product which absorbs radiation such as for example boroo. and its derivatives,, which may represent up to 30% of the mass of aluminium used™ Hie gadolinium-aluminium alloys which are produced in that way,, by virtue of their good mechanical properties,? can be easily transformed into absorbers of any shape whatever by one at least of the production processes selected from casting g whether in sand,, in a chill mould,, or under high or low pressure, hot or cold rollinge extrusion and forging.
Such alloys give perfectly homogenous structures with very regular effective capture sections. In additionr their specific gravity which is variable in dependence on the percentage of Gd gives a value close to that of aluminium,, with proportions of Gd of up to 30% by weight t< which makes it possible to produce very light neutron terriers. Table I below gives values in respect of specific gravity for two binary alloys Al-Gds, one containing 11% of Gd and the other containing 23% of Gd.
TABLE I : SPECIFIC GRAVITIES OF BINARY ALLOYS Al-Gd % by weight of Gd Specific gravity 11 25 2.92 3.12 5 - The aluminium matrix gives the finished products an 2 excellent level of thermal conductivity {fran IX) to 180 W/m depending an the aliminiwn matrix: selected) t9 which thus makes it possible rapidly to rero^e the heat generated by absorption, to 5 external cooling systems- The point at which the alloys Al-Gd begin to melt is very hight, being in most cases higher than 620°Q that characteristic pentiits the neutron barriers which are produced in that ray easily to withstand the heating' effect caused by the absorption of neutrons 10 or other rays.
The atomic mass of Gd being very high (156.9 g), I" and X-rays in particular are absorbed to a very substantial extent.
Resistance to corrosion,, generally speaking,, is not affected or only little affected by the presence of gadolinium, and 15 the corrosion properties are close to those of the aluminium natrices used. Alloys of series 1COO, 5GQ0 and 6000 enjoy excellent resistance to corrosion in respect of atmospheric agents or in a marine atmosphere. That resistance to corrosion may be further enhanced by suitable surface treatments (anodizatian,, alcdinet, painting,, plastics 20 coatings etc-).
The mechanical properties are high and. depend on the aluminium metric selected., In the case of binary alutdnium-gadolitiima alloys, mechanical properties vary with the amount of gadolinium j Table II sets out results obtained with cast alloys 2, one with a 25 proportion of Gd of 12% by weight and the other with a percentage by weight of 25%.
TABLE II - MECHANICAL PROPERTIES OF BINARY Al-Gd ALLOYS % by weight of Gd Rm MPA Bp 0»2 MPA A % HB 12% 140 60 17 40 25% 80 55 0.8 54 Tfeble III sets forth the results obtained with rolled alloys containing 11% fay weight of CM.
MiL/I1. " MERCHANTPAT, TENSILE CHARACTERISTICS IN A ROLLS) Al-Gd ALLOY 1 % by weight of Gd Lengthwise direction Lengthwise transverse direction HB Rm MPA Rp 0.2 MPA A % Rm MPA Rp 0„2 MPA A % 11 130 110 15 130 110 10 42 By using aluminium matrices vmich are doped with elements such as copperL, silicon, zinc, magnesium etc. £. the level of strength and the elastic limit can be greatly increased to attain the following values: Rm 280 to 320 MPA Rp 0„2 220 to 260 MPA A % fran 3 to 10% The higher values set out hereinbefore are not limiting it being appreciated that ternary, quaternary e, quinary,, etc alley carnpositions comprising gadolinium could give values much higher than those indicated above.
Machining of those metal alloys dees not give rise to 5 any problem,, the parameters and the operating speeds to be taken into account being the same as those which are generally used for aluninium alleys™ There are snany uses for this invention and they all concern areas in which there is a problem in regard to the absorption of 10 radiation, (neutrons, ¥-rays. X-rays), whether such areas are military or civil.
The following may be mentioned sn exanples of use: flasks for transporting and storing nuclear waste, swimming-pool racks for storing nuclear reactor fuel elements, decontamination installation 15 shielding, shielding or armouring for military vehicles t, fall-out shelters e, nuclear reactor elegants t, shielding for monitoring apparatuses using radiation or radioactive sources, etc- That list would not be intended in any way to be limitative. * i. ( - 8 -
Claims (12)
1. - An absorber for nuclear radiations w-herein it is formed by an alloy of gadolinium with an aluminium selected from the group comprising pure aluminium „ alloyed aluminium and pure or alloyed aluminium containing a dispersed phase.
2. .An absorber according to claim 1 wherein the proportion, of gadolinium is from 0-05% to 70% by weight.
3. An absorber according to claim 2 wherein the proportion of gadolinium is from 0.1 to 15%.
4. An absorber according to claim 1 wherein the alloyed aluminium is selected from the alloys denoted by the numbers 10C0£, 5000 and 6000 in the Alununium Association standards „
5. An absorber according to claijn 1 wherein the alloyed aluminium contains at least one nuclear radiation absorber metal.
6. An absorber according to claim 5 wherein the metal belongs to the group formed by cadmiumt, samariumf, europium, lithium, hafnium and tantalum™
7. An absorber according to claim 1 wherein the dispersed phase contains at least one nuclear radiation absorber product-
8. An absorber according to claim 7 wherein the dispersed phase is formed by boron or one of the derivatives thiereof.
9. An absorber according to claim 8 wherein the boron represents up to 30% by weight of the aluminium-
10. An absorber according to claim 1 wherein the dispersed phase is in the form of fibres.
11. An absorber according to claim 1 wherein it is produced by one at least of the production processes selected from casting,, rolling# extrusion and forging.
12. An absorber for nuclear radiations as claimed in claim 1 substantially as hereinbefore described by way of Example. Dated this 10th day of July 1986- BY: TONKINS & CO™;, Ap^icants Agents, (Signed) j|_ 5 DJftmouth Road, DUBLlM 6. 20 25 30 35 - 10 -
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8510983A FR2584852B1 (en) | 1985-07-11 | 1985-07-11 | NUCLEAR RADIATION ABSORBER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE861851L true IE861851L (en) | 1987-01-11 |
| IE58952B1 IE58952B1 (en) | 1993-12-01 |
Family
ID=9321402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE185186A IE58952B1 (en) | 1985-07-11 | 1986-07-10 | Absorber for nuclear radiations |
Country Status (19)
| Country | Link |
|---|---|
| EP (1) | EP0211779B1 (en) |
| JP (1) | JPS6270799A (en) |
| KR (1) | KR910007461B1 (en) |
| AT (1) | ATE40763T1 (en) |
| AU (1) | AU580177B2 (en) |
| BR (1) | BR8603239A (en) |
| CA (1) | CA1268031A (en) |
| DE (1) | DE3662078D1 (en) |
| DK (1) | DK327786A (en) |
| ES (1) | ES2001015A6 (en) |
| FI (1) | FI85923C (en) |
| FR (1) | FR2584852B1 (en) |
| GR (1) | GR861792B (en) |
| IE (1) | IE58952B1 (en) |
| IL (1) | IL79385A0 (en) |
| NO (1) | NO169035C (en) |
| NZ (1) | NZ216802A (en) |
| PT (1) | PT82958B (en) |
| ZA (1) | ZA865168B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6338553A (en) * | 1986-08-01 | 1988-02-19 | Kobe Steel Ltd | Aluminum alloy having superior thermal neutron absorbing power |
| DE19706758A1 (en) * | 1997-02-20 | 1998-05-07 | Siemens Ag | Apparatus used to store spent fuel elements from nuclear power stations |
| JP3122436B1 (en) | 1999-09-09 | 2001-01-09 | 三菱重工業株式会社 | Aluminum composite material, method for producing the same, and basket and cask using the same |
| AU2005235632B2 (en) * | 2004-04-22 | 2011-01-20 | Alcan International Limited | Improved neutron absorption effectiveness for boron content aluminum materials |
| WO2014201565A1 (en) | 2013-06-19 | 2014-12-24 | Rio Tinto Alcan International Limited | Aluminum alloy composition with improved elevated temperature mechanical properties |
| WO2017209038A1 (en) * | 2016-05-30 | 2017-12-07 | 株式会社フジクラ | Gadolinium wire material, method for manufacturing same, metal-coated gadolinium wire material using same, heat exchanger, and magnetic refrigeration device |
| JP2017214652A (en) * | 2016-05-30 | 2017-12-07 | 株式会社フジクラ | Gadolinium wire, method for producing the same, metal-coated gadolinium wire prepared therewith, heat exchanger and magnetic refrigeration device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS583001B2 (en) * | 1977-12-16 | 1983-01-19 | 財団法人特殊無機材料研究所 | Neutron absorbing material and its manufacturing method |
| DE3024892A1 (en) * | 1979-08-18 | 1982-02-11 | Thyssen Industrie Ag, 4300 Essen | Steel castings which can be hardened and tempered - contain lanthanide so they can be used as neutron absorbing shields |
| JPS6055460B2 (en) * | 1980-08-12 | 1985-12-05 | 東芝セラミツクス株式会社 | Alumina sintered pellets for neutron absorption |
| CA1183613A (en) * | 1980-12-27 | 1985-03-05 | Koichiro Inomata | Neutron absorber, neutron absorber assembly utilizing the same, and other uses thereof |
| FR2533943B1 (en) * | 1982-10-05 | 1987-04-30 | Montupet Fonderies | PROCESS FOR THE MANUFACTURE OF COMPOSITE ALLOYS BASED ON ALUMINUM AND BORON AND ITS APPLICATION |
| DE3335888A1 (en) * | 1983-10-03 | 1985-04-18 | Kernforschungsanlage Jülich GmbH, 5170 Jülich | METHOD FOR REDUCING THE REACTIVITY OF A GAS-COOLED BULLET HEAD REACTOR AND SHUT-OFF ELEMENT |
| JPS6212895A (en) * | 1985-07-10 | 1987-01-21 | 株式会社神戸製鋼所 | Aluminum alloy having excellent neutron absorptivity |
-
1985
- 1985-07-11 FR FR8510983A patent/FR2584852B1/en not_active Expired
-
1986
- 1986-07-09 DE DE8686420187T patent/DE3662078D1/en not_active Expired
- 1986-07-09 AT AT86420187T patent/ATE40763T1/en not_active IP Right Cessation
- 1986-07-09 GR GR861792A patent/GR861792B/en unknown
- 1986-07-09 EP EP86420187A patent/EP0211779B1/en not_active Expired
- 1986-07-09 NZ NZ216802A patent/NZ216802A/en unknown
- 1986-07-10 BR BR8603239A patent/BR8603239A/en unknown
- 1986-07-10 AU AU60048/86A patent/AU580177B2/en not_active Ceased
- 1986-07-10 KR KR1019860005558A patent/KR910007461B1/en not_active Expired
- 1986-07-10 ES ES8600232A patent/ES2001015A6/en not_active Expired
- 1986-07-10 NO NO862793A patent/NO169035C/en unknown
- 1986-07-10 JP JP61162924A patent/JPS6270799A/en active Pending
- 1986-07-10 DK DK327786A patent/DK327786A/en not_active Application Discontinuation
- 1986-07-10 ZA ZA865168A patent/ZA865168B/en unknown
- 1986-07-10 IE IE185186A patent/IE58952B1/en not_active IP Right Cessation
- 1986-07-10 CA CA000513519A patent/CA1268031A/en not_active Expired - Fee Related
- 1986-07-10 FI FI862902A patent/FI85923C/en not_active IP Right Cessation
- 1986-07-10 IL IL79385A patent/IL79385A0/en not_active IP Right Cessation
- 1986-07-10 PT PT82958A patent/PT82958B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI85923C (en) | 1992-06-10 |
| GR861792B (en) | 1986-11-04 |
| AU6004886A (en) | 1987-01-15 |
| NO169035B (en) | 1992-01-20 |
| NO862793D0 (en) | 1986-07-10 |
| PT82958A (en) | 1986-08-01 |
| IL79385A0 (en) | 1986-10-31 |
| ATE40763T1 (en) | 1989-02-15 |
| JPS6270799A (en) | 1987-04-01 |
| FI85923B (en) | 1992-02-28 |
| KR870001611A (en) | 1987-03-14 |
| PT82958B (en) | 1993-03-31 |
| FR2584852B1 (en) | 1987-10-16 |
| DK327786D0 (en) | 1986-07-10 |
| NO169035C (en) | 1992-04-29 |
| DK327786A (en) | 1987-01-12 |
| CA1268031A (en) | 1990-04-24 |
| KR910007461B1 (en) | 1991-09-26 |
| EP0211779A1 (en) | 1987-02-25 |
| AU580177B2 (en) | 1989-01-05 |
| ZA865168B (en) | 1987-03-25 |
| FI862902L (en) | 1987-01-12 |
| NZ216802A (en) | 1989-06-28 |
| ES2001015A6 (en) | 1988-04-16 |
| IE58952B1 (en) | 1993-12-01 |
| EP0211779B1 (en) | 1989-02-08 |
| FR2584852A1 (en) | 1987-01-16 |
| NO862793L (en) | 1987-01-12 |
| BR8603239A (en) | 1987-02-24 |
| DE3662078D1 (en) | 1989-03-16 |
| FI862902A0 (en) | 1986-07-10 |
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