DE102018114550A1 - Process for pre-cleaning solutions containing radionuclides - Google Patents
Process for pre-cleaning solutions containing radionuclides Download PDFInfo
- Publication number
- DE102018114550A1 DE102018114550A1 DE102018114550.0A DE102018114550A DE102018114550A1 DE 102018114550 A1 DE102018114550 A1 DE 102018114550A1 DE 102018114550 A DE102018114550 A DE 102018114550A DE 102018114550 A1 DE102018114550 A1 DE 102018114550A1
- Authority
- DE
- Germany
- Prior art keywords
- solution
- nuclides
- complexes
- precipitation
- radionuclides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004140 cleaning Methods 0.000 title claims abstract description 10
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 11
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- 239000012141 concentrate Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical class OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 7
- 150000004679 hydroxides Chemical class 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 230000006378 damage Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000010923 batch production Methods 0.000 claims description 2
- 238000010924 continuous production Methods 0.000 claims 1
- 238000000151 deposition Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 150000002500 ions Chemical class 0.000 description 7
- 230000002285 radioactive effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 150000001860 citric acid derivatives Chemical class 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 150000003891 oxalate salts Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
-
- 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
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/10—Processing by flocculation
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Extraction Or Liquid Replacement (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Detergent Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Die Erfindung bezieht sich auf ein Verfahren zum Vorreinigen von Radionuklide, wie Co-60, enthaltenden Lösungen, wie Verdampferkonzentraten kerntechnischer Anlagen, durch Ausfällen von nichtaktiven Nukliden in einem hydrothermalen Prozess und anschließendes Abtrennen der ausgefällten Feststoffe.The invention relates to a method for pre-cleaning radionuclides, such as Co-60, containing solutions, such as evaporator concentrates of nuclear plants, by precipitation of non-active nuclides in a hydrothermal process and subsequent separation of the precipitated solids.
Description
Die Erfindung bezieht sich auf ein Verfahren zum Vorreinigen von Radionuklide, wie Co-60, enthaltenden Lösungen, wie Verdampferkonzentraten kerntechnischer Anlagen.The invention relates to a method for the pre-cleaning of radionuclides, such as Co-60, containing solutions, such as evaporator concentrates, of nuclear plants.
Bei der Aufarbeitung von insbesondere aus kerntechnischen Anlagen stammenden Lösungen, wie Verdampferkonzentraten, können unterschiedliche Verfahren zur Abscheidung von komplex gebundenen Radionukliden zum Einsatz gelangen. Hierzu gehört die Behandlung in überkritischem Wasser, die Behandlung mit Diamantelektroden und Ionenaustauschern oder die Behandlung mit Ozon und Ionenaustauschern.When processing solutions, in particular from nuclear plants, such as evaporator concentrates, different methods can be used to separate complex-bound radionuclides. This includes treatment in supercritical water, treatment with diamond electrodes and ion exchangers or treatment with ozone and ion exchangers.
Nachteil der bekannten Verfahren ist grundsätzlich, dass auch nichtaktive Nuklide bei den entsprechenden Verfahren mit entfernt werden, die in einer ungleich höheren Konzentration in der Lösung als die radioaktiven Nuklide vorliegen, so dass z. B. bei einem Einsatz von Ionentauschern oder Adsorbern ein häufiger Wechsel des Ionentauscher- bzw. Adsorbermaterials oder bei Einsatz von Elektroden deren Erneuerung erforderlich ist.A disadvantage of the known methods is that non-active nuclides are also removed in the corresponding methods, which are present in the solution in an incomparably higher concentration than the radioactive nuclides, so that, for. B. when using ion exchangers or adsorbers, a frequent change of the ion exchanger or adsorber material or when using electrodes whose replacement is necessary.
Dabei ist als Hauptträger der Radioaktivität Co-60 zu nennen, dessen Komplex mit EDTA (Ethylendiamintetraessigsäure) von außergewöhnlicher Stabilität ist. Mit den entsprechenden Verfahren insbesondere unter Einsatz von Ionentauschern bzw. Absorbern können entsprechende Komplexe zerstört und Co-60 abgeschieden werden. Allerdings erfolgt eine unerwünschte Belastung durch Abscheiden von nichtaktiven Nukliden und weiteren radioaktiven Nukliden, so dass der angesprochene häufige Wechsel der Materialien erforderlich ist.The main carrier of the radioactivity is Co-60, whose complex with EDTA (ethylenediaminetetraacetic acid) is of exceptional stability. Corresponding complexes can be destroyed and Co-60 deposited using the appropriate methods, in particular using ion exchangers or absorbers. However, there is an undesirable burden due to the separation of non-active nuclides and other radioactive nuclides, so that the mentioned frequent change of materials is necessary.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Verfügung zu stellen, dass es ermöglicht, dass dann, wenn aus der Lösung Radionuklide abgeschieden werden sollen, der Anteil an nichtaktiven Nukliden reduziert ist.The object of the present invention is to provide a method which makes it possible for the proportion of non-active nuclides to be reduced when radionuclides are to be deposited from the solution.
Zur Lösung der Aufgabe der Erfindung sieht die Erfindung ein Verfahren zum Vorreinigen von Radionuklide enthaltenden Lösungen durch Ausfällen von zumindest nichtaktiven Nukliden in einem hydrothermalen Prozess und anschließendes Abtrennen der ausgefällten Nuklide vor, wobei ein Zerstören von Co-60-Komplexen, insbesondere EDTA-Komplexen, grundsätzlich unterbleibt.To achieve the object of the invention, the invention provides a method for the precleaning of solutions containing radionuclides by precipitation of at least inactive nuclides in a hydrothermal process and subsequent separation of the precipitated nuclides, with destruction of Co-60 complexes, in particular EDTA complexes, fundamentally omitted.
Selbstverständlich werden nach dem erfindungsgemäßen im Vergleich zum Abscheiden von Co-60 verwendeten Verfahren als milden hydrothermalen Prozess zu bezeichnendes erfindungsgemäße Verfahren auch radioaktive Nuklide der schwachen Komplexe von Fe, Cr, Ni, etc. abgeschieden, deren Beitrag zur Radioaktivität gering ist. Bei der Vorreinigung fallen entsprechende radioaktive Nuklide schwacher Komplexe gleichfalls an.Of course, according to the method according to the invention, which is to be referred to as the mild hydrothermal process in comparison to the deposition of Co-60, radioactive nuclides of the weak complexes of Fe, Cr, Ni, etc., whose contribution to the radioactivity is small, are also deposited. Corresponding radioactive nuclides of weak complexes are also obtained during the preliminary cleaning.
Aufgrund der erfindungsgemäßen Lehre besteht die Möglichkeit, die im mehrfach größeren Umfang in der Lösung enthaltenen nichtaktiven Nuklide zu entfernen, so dass das anschließende Entfernen insbesondere des Radionuklids Co-60 kostengünstiger und effektiver gestaltbar ist.On the basis of the teaching according to the invention, it is possible to remove the non-active nuclides contained in the solution to a greater extent, so that the subsequent removal, in particular of the radionuclide Co-60, can be designed more cost-effectively and effectively.
Insbesondere ist erfindungsgemäß vorgesehen, dass Citrate, Oxalate oder EDTA Komplexe von Fe, Mn, Ni und Cr bei dem hydrothermalen Prozess zerstört werden und als Hydroxide ausfällen, die sodann z.B. durch Filtrierung oder Zentrifugieren aus der Lösung entfernt werden.In particular, the invention provides that citrates, oxalates or EDTA complexes of Fe, Mn, Ni and Cr are destroyed in the hydrothermal process and precipitate out as hydroxides, which then e.g. be removed from the solution by filtration or centrifugation.
Das Hydrothermalverfahren wird insbesondere derart durchgeführt, dass die Lösung in einem Druckbehälter einer Temperatur T mit insbesondere 150°C ≤ T ≤ 220°C über eine Zeit t ausgesetzt wird, wobei die Zeit zwischen 5 Min. und 15 Min., insbesondere in einem Bereich zwischen 8 und 12 Minuten liegen kann.The hydrothermal process is carried out in particular in such a way that the solution in a pressure vessel is exposed to a temperature T with in particular 150 ° C. T T 220 220 ° C. over a time t, the time between 5 minutes and 15 minutes, in particular in one area can be between 8 and 12 minutes.
Durch die eingestellte Temperatur in dem Druckbehälter wird gleichzeitig ein Druck für die Zerstörung von u. a. den Komplexen der nichtaktiven Nuklide und zum Ausfällen dieser auf einen Wert von ca. 1,5 MPa aufgebaut.Due to the set temperature in the pressure vessel, a pressure for the destruction of u. a. the complexes of the inactive nuclides and to precipitate them to a value of approx. 1.5 MPa.
Bei entsprechenden Bedingungen wird der stabile Co-60/EDTA-Komplex nicht zerstört. Die nach dem Filtrieren der dem hydrothermalen Vorreinigungsprozess unterzogene Lösung wird sodann eingangs genannter Verfahren ausgesetzt, um die stabilen Co-60-Komplexe zu zerstören und das Radionuklid abzuscheiden.Under appropriate conditions, the stable Co-60 / EDTA complex is not destroyed. The solution subjected to the hydrothermal pre-purification process after filtering is then suspended in order to destroy the stable Co-60 complexes and to separate the radionuclide.
Um die Abscheideleistung in dem hydrothermalen Vorreinigungsprozess zu erhöhen besteht die Möglichkeit, in dem Behälter, in dem die Vorreinigung durchgeführt wird, den Druck über den sich durch die Temperatur ergebenden Wert zu erhöhen.In order to increase the separation performance in the hydrothermal pre-cleaning process, there is the possibility of increasing the pressure in the container in which the pre-cleaning is carried out above the value resulting from the temperature.
Während des hydrothermalen Prozesses bedarf es zum Ausfällen der Nuklide keiner weiteren Maßnahmen, insbesondere des Einsatzes weder anorganischer Matrixmaterialien, die ansonsten zum Abscheiden von Nukliden eingesetzt werden, noch von Oxidationsmitteln wie Wasserstoffperoxid.During the hydrothermal process, no further measures are required to precipitate the nuclides, in particular the use of neither inorganic matrix materials, which are otherwise used for the separation of nuclides, nor of oxidizing agents such as hydrogen peroxide.
Insbesondere ist vorgesehen, dass die Lösung in dem Druckbehälter auf einen pH-Wert mit pH ≥ 7 eingestellt wird. Bei höheren pH-Werten kann das Ausfällen der nichtaktiven Nuklide verbessert werden.
Das Ausfällen der nichtaktiven Nuklide kann kontinuierlich oder im Batch-Verfahren durchgeführt werden.In particular, it is provided that the solution in the pressure vessel is adjusted to a pH value with pH ≥ 7. At higher pH values, the precipitation of the inactive nuclides can be improved.
The precipitation of the inactive nuclides can be carried out continuously or in a batch process.
Des Weiteren ist durch den hydrothermalen Prozess die Möglichkeit gegeben, organische Inhaltsstoffe, wie Feststoffe, insbesondere Baumwollflusen oder Papierteilchen, zu zerstören, wodurch die Belastung von Hilfsmitteln, wie Schüttungen von Oxiden, wie TiO2, oder Ionentauschermaterialien beim Entfernen der Radionuklide in einem nachfolgenden Verfahrensschritt zusätzlich verringert wird.Furthermore, the hydrothermal process offers the possibility of destroying organic ingredients, such as solids, in particular cotton fluff or paper particles, as a result of which the load on auxiliaries, such as beds of oxides, such as TiO 2 , or ion exchange materials when removing the radionuclides in a subsequent process step is additionally reduced.
Weitere Einzelheiten, Vorteile und Merkmale der Erfindung ergeben sich nicht nur aus den Ansprüchen, den diesen zu entnehmenden Merkmalen -für sich und/oder in Kombination-, sondern auch aus der nachfolgenden Beschreibung.Further details, advantages and features of the invention result not only from the claims, the features to be extracted from them - individually and / or in combination - but also from the following description.
In der einzigen Figur ist Prinzipdarstellung der Verfahrensablauf zum Vorreinigen einer Radionuklide enthaltenden Lösung, wie Verdampferkonzentrat einer kerntechnischen Anlage, dargestellt. Erfindungsgemäß ist vorgesehen, dass das Verdampferkonzentrat einem Autoklaven
Durch diesen hydrothermalen Prozess werden in der Lösung z. B. Citrate, Oxalate oder deren Komplexe, wie auch EDTA Komplexe, in denen nichtaktive Nuklide vorliegen, zerstört und die Nuklide in Form von Hydroxiden ausgefällt, wobei es sich insbesondere um Hydroxide von Fe, Mn, Ni und Cr handelt. Auch werde organische Inhaltsstoffe wie Baumwollflusen oder Papierteilchen zerstört.This hydrothermal process z. B. citrates, oxalates or their complexes, as well as EDTA complexes in which inactive nuclides are present, destroyed and the nuclides precipitated in the form of hydroxides, in particular hydroxides of Fe, Mn, Ni and Cr. Organic ingredients such as cotton fluff or paper particles are also destroyed.
Die durch den hydrothermalen Prozess entstandene Suspension wird nach dem Abkühlen einem Abscheider
Claims (11)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018114550.0A DE102018114550A1 (en) | 2018-06-18 | 2018-06-18 | Process for pre-cleaning solutions containing radionuclides |
EP19179905.5A EP3584800B1 (en) | 2018-06-18 | 2019-06-13 | Method for pre-purifying solutions containing radionuclides |
HUE19179905A HUE064015T2 (en) | 2018-06-18 | 2019-06-13 | Method for pre-purifying solutions containing radionuclides |
FIEP19179905.5T FI3584800T3 (en) | 2018-06-18 | 2019-06-13 | Method for pre-purifying solutions containing radionuclides |
ES19179905T ES2962664T3 (en) | 2018-06-18 | 2019-06-13 | Procedure for prior purification of solutions containing radionuclides |
RU2019118658A RU2754873C2 (en) | 2018-06-18 | 2019-06-17 | Method for preliminary purification of solutions containing radionuclides |
JP2019112631A JP7043458B2 (en) | 2018-06-18 | 2019-06-18 | How to pre-purify a solution containing radionuclides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018114550.0A DE102018114550A1 (en) | 2018-06-18 | 2018-06-18 | Process for pre-cleaning solutions containing radionuclides |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102018114550A1 true DE102018114550A1 (en) | 2019-12-19 |
Family
ID=66857734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102018114550.0A Withdrawn DE102018114550A1 (en) | 2018-06-18 | 2018-06-18 | Process for pre-cleaning solutions containing radionuclides |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP3584800B1 (en) |
JP (1) | JP7043458B2 (en) |
DE (1) | DE102018114550A1 (en) |
ES (1) | ES2962664T3 (en) |
FI (1) | FI3584800T3 (en) |
HU (1) | HUE064015T2 (en) |
RU (1) | RU2754873C2 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10156119A1 (en) * | 2001-11-15 | 2003-06-05 | Kernkraftwerk Gundremmingen Gm | Process for the recovery of · 1 ·· 0-boron or decontamination of boron from evaporator concentrates from pressurized water reactors |
DE10255064A1 (en) * | 2002-11-25 | 2004-06-17 | Rwe Nukem Gmbh | Process for treating radioactive waste water |
DE102004045524A1 (en) * | 2004-09-20 | 2006-04-06 | Kernkraftwerk Gundremmingen Gmbh | Decontamination of organically-loaded waste waters from nuclear power stations, treats with ozone and precipitates or flocculates radioactive nuclides |
WO2013145237A1 (en) * | 2012-03-29 | 2013-10-03 | 三菱重工メカトロシステムズ株式会社 | Decontamination device and decontamination method for radioactive contaminated material |
US20140228612A1 (en) * | 2011-08-05 | 2014-08-14 | Radwaste And Decommissioning Center | Process and device for reducing radioactive material of object containing radioactive material to safe level in living environment |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2297055C1 (en) * | 2006-04-21 | 2007-04-10 | Общество С Ограниченной Ответственностью "Наука-Технологии-Производство" | Method for recovering still bottoms of liquid radioactive waste |
RU2321909C1 (en) * | 2006-12-06 | 2008-04-10 | Общество С Ограниченной Ответственностью "Наука-Технологии-Производство" | Method for recovering liquid radioactive waste (alternatives) |
JP2009162646A (en) * | 2008-01-08 | 2009-07-23 | Toshiba Corp | Method for treating used ion-exchange resin |
JP5018989B1 (en) * | 2011-08-05 | 2012-09-05 | 株式会社Cdmコンサルティング | Method to reduce radioactive material to safe level in living environment |
-
2018
- 2018-06-18 DE DE102018114550.0A patent/DE102018114550A1/en not_active Withdrawn
-
2019
- 2019-06-13 EP EP19179905.5A patent/EP3584800B1/en active Active
- 2019-06-13 HU HUE19179905A patent/HUE064015T2/en unknown
- 2019-06-13 ES ES19179905T patent/ES2962664T3/en active Active
- 2019-06-13 FI FIEP19179905.5T patent/FI3584800T3/en active
- 2019-06-17 RU RU2019118658A patent/RU2754873C2/en active
- 2019-06-18 JP JP2019112631A patent/JP7043458B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10156119A1 (en) * | 2001-11-15 | 2003-06-05 | Kernkraftwerk Gundremmingen Gm | Process for the recovery of · 1 ·· 0-boron or decontamination of boron from evaporator concentrates from pressurized water reactors |
DE10255064A1 (en) * | 2002-11-25 | 2004-06-17 | Rwe Nukem Gmbh | Process for treating radioactive waste water |
DE102004045524A1 (en) * | 2004-09-20 | 2006-04-06 | Kernkraftwerk Gundremmingen Gmbh | Decontamination of organically-loaded waste waters from nuclear power stations, treats with ozone and precipitates or flocculates radioactive nuclides |
US20140228612A1 (en) * | 2011-08-05 | 2014-08-14 | Radwaste And Decommissioning Center | Process and device for reducing radioactive material of object containing radioactive material to safe level in living environment |
WO2013145237A1 (en) * | 2012-03-29 | 2013-10-03 | 三菱重工メカトロシステムズ株式会社 | Decontamination device and decontamination method for radioactive contaminated material |
Non-Patent Citations (1)
Title |
---|
EPA Übersetzung WO 2013 - 145 237 A1 (EB) * |
Also Published As
Publication number | Publication date |
---|---|
JP7043458B2 (en) | 2022-03-29 |
EP3584800A1 (en) | 2019-12-25 |
JP2019219397A (en) | 2019-12-26 |
RU2019118658A3 (en) | 2021-07-05 |
FI3584800T3 (en) | 2023-10-30 |
RU2754873C2 (en) | 2021-09-08 |
RU2019118658A (en) | 2020-12-17 |
EP3584800B1 (en) | 2023-08-02 |
HUE064015T2 (en) | 2024-02-28 |
ES2962664T3 (en) | 2024-03-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1114794B (en) | Process for the extraction of uranium by the alkaline treatment of uranium ores | |
DE1215669B (en) | Process for processing irradiated nuclear reactor fuel | |
DE69406412T2 (en) | METHOD FOR REGENERATING METAL SULFATE CONTAINING WASTE SULFURIC ACID | |
EP0475289A1 (en) | Method of recovering nickel | |
EP3584800B1 (en) | Method for pre-purifying solutions containing radionuclides | |
EP2188814B1 (en) | Method for decontaminating surfaces, which have been contaminated with alpha emitters, of nuclear plants | |
DE3634180A1 (en) | Process for recovering boric-acid solutions that can be re-used in nuclear power stations from radioactive wastes and solutions arising in nuclear power stations | |
DE102006050608A1 (en) | Procedure for softening drinking water in an industrial reactor using a weakly acidic cation exchanger, comprises regenerating the cation exchanger by the water after taking up alkaline earth metal ions | |
DE4037329A1 (en) | Treatment of waste water from glass grinding - by passing water in periodical reversing direction across ultrafiltration membrane, recycling permeate and adding concentrate to molten glass | |
DE2526247A1 (en) | Recovering acid and metals from spent pickling soln. - using anionic exchange resin to remove metal forming anionic complex | |
DE2501396A1 (en) | PROCESS FOR THE REMOVAL OF COPPER FROM ACID SOLUTIONS CONTAINING SMALL AMOUNTS OF COPPER | |
DE2528990A1 (en) | Sepn. of oil-in-water emulsions - using ultrafiltration with membrane not permeable by oil with physical or chemical pretreatment | |
DE2422711A1 (en) | Removal of radioactive iodine from aq. solns. - by two-step pptn. jointly with other radioactive isotopes | |
DE202019001503U1 (en) | 3D-Filtration-ULW Ultrafiltration of the circulating water from hybrid recooling plants and other cooling plants with circulating water | |
EP4082030B1 (en) | Method and device for cleaning a liquid | |
DE19806796A1 (en) | Method and device for the treatment and / or pretreatment of liquids to be treated by means of a membrane filter device | |
EP0584146A1 (en) | Method for the desilification of aqueous inorganic solutions | |
JPS6368695A (en) | Method for removing impurities from rolling fluid | |
EP3750172B1 (en) | Process for the separation of cesium and technetium | |
DE2608399A1 (en) | Purification of condenser and boiler feed water - and a process for regenerating the bed of mixed ion exchange granules | |
DE594949C (en) | Process for cleaning water, in particular waste water, with the separation of components contained therein | |
AT282275B (en) | Process and device for cleaning or regenerating chromic acid electrolytes | |
EP1665289B1 (en) | Method for regenerating decontamination agents | |
DE942563C (en) | Process for the production of potash salts from dilute solutions | |
DE2136185B2 (en) | Process for cleaning blowdown water in steam power plants with nuclear reactors |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R081 | Change of applicant/patentee |
Owner name: NUKEM TECHNOLOGIES ENGINEERING SERVICES GMBH, DE Free format text: FORMER OWNER: NUKEM TECHNOLOGIES ENGINEERING SERVICES GMBH, 63755 ALZENAU, DE |
|
R120 | Application withdrawn or ip right abandoned |