EP3584800B1 - Method for pre-purifying solutions containing radionuclides - Google Patents
Method for pre-purifying solutions containing radionuclides Download PDFInfo
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- EP3584800B1 EP3584800B1 EP19179905.5A EP19179905A EP3584800B1 EP 3584800 B1 EP3584800 B1 EP 3584800B1 EP 19179905 A EP19179905 A EP 19179905A EP 3584800 B1 EP3584800 B1 EP 3584800B1
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- purifying
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- nuclides
- precipitated
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- 238000000034 method Methods 0.000 title claims description 36
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 14
- 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 8
- 239000007787 solid Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 6
- 230000006378 damage Effects 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- 150000004679 hydroxides Chemical class 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 239000000470 constituent Substances 0.000 claims 1
- 238000011437 continuous method Methods 0.000 claims 1
- 239000012634 fragment Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 18
- 150000002500 ions Chemical class 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 230000001376 precipitating effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 238000000151 deposition Methods 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
- 239000002245 particle Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000012857 radioactive material Substances 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010923 batch production Methods 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
- 239000007788 liquid Substances 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
- 239000000941 radioactive substance Substances 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
Definitions
- the invention relates to a method for pre-purifying solutions containing radionuclides.
- non-active nuclides are also removed in the corresponding methods, which are present in the solution in a disproportionately higher concentration than the radioactive nuclides, so that e.g. B. when using ion exchangers or adsorbers, a frequent change of the ion exchanger or adsorber material or when using electrodes whose replacement is required.
- the main source of radioactivity is Co-60, whose complex with EDTA (ethylenediaminetetraacetic acid) is exceptionally stable. Corresponding complexes can be destroyed and Co-60 separated with the appropriate processes, in particular using ion exchangers or adsorbers. However, an undesired load occurs due to the separation of non-active nuclides and other radioactive nuclides, so that the mentioned frequent changing of the materials is necessary.
- EDTA ethylenediaminetetraacetic acid
- the WO 2013/145237 A1 a hydrothermal process can be found to decontaminate radioactively contaminated material. A water-soluble and a water-insoluble part generated. The water soluble portion is then dried and placed in barrels.
- the EP 2 747 089 A1 refers to a method of reducing the levels of radioactive substances in an object using a hydrothermal process.
- the radioactive material is dissolved in an aqueous liquid.
- a liquid-solid separation is then carried out.
- the radioactive material can then be adsorbed.
- the present invention is based on the object of providing a method which makes it possible, when radionuclides are to be separated from the solution, to reduce the proportion of non-active nuclides.
- the invention provides a method for pre-purifying solutions containing radionuclides by precipitating inactive nuclides from the group Fe, Mn, Ni, Cr in a hydrothermal process and then separating the precipitated nuclides, with destruction of Co 60 complexes, in particular EDTA complexes, are generally omitted.
- radioactive nuclides of the weak complexes of Fe, Cr, Ni, etc. are also deposited according to the method according to the invention, which can be described as a mild hydrothermal process compared to the deposition of Co-60. Corresponding radioactive nuclides of weak complexes also occur during pre-cleaning.
- citrates, oxalates or EDTA complexes of Fe, Mn, Ni and Cr are destroyed in the hydrothermal process and precipitate as hydroxides which are then removed from the solution, for example by filtration or centrifugation.
- 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 ⁇ 220° C. for a time t, the time being between 5 minutes and 15 minutes, in particular in a range can be between 8 and 12 minutes.
- the stable Co-60/EDTA complex is not destroyed.
- the solution which has been subjected to the hydrothermal pre-cleaning process after filtering, is then subjected to the process mentioned at the outset in order to destroy the stable Co-60 complexes and separate the radionuclide.
- the solution in the pressure vessel is adjusted to a pH value of pH ⁇ 7.
- the precipitation of the non-active nuclides can be improved at higher pH values.
- the non-active nuclides can be precipitated continuously or in a batch process.
- the hydrothermal process makes it possible to destroy organic ingredients such as solids, in particular cotton fluff or paper particles, which means that the burden 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.
- auxiliaries such as beds of oxides such as TiO 2
- ion exchange materials when removing the radionuclides in a subsequent process step is additionally reduced.
- the pre-cleaning of the solution can be carried out according to one or more of the options explained above.
- the process sequence for pre-cleaning a solution containing radionuclides such as an evaporator concentrate of a nuclear facility, is shown in principle.
- the evaporator concentrate is fed to an autoclave 10, ie a pressure vessel, in which the solution is heated to a temperature of approximately 200° C. and maintained at this temperature for a period of approximately 10 minutes. Due to the temperature of 200 °C, a pressure of approx. 15 bar is set above the solution. However, it is possible to reduce the pressure by e.g. B. suitable pumps.
- the suspension produced by the hydrothermal process is fed to a separator 12, in which z. B. is a centrifuge or a filter.
- the separated solids are removed, and then the solids-free solution is sent to another radionuclide removal process.
- This may be a method such as treatment in supercritical water, treatment with diamond electrodes and ion exchangers, or treatment with ozone and ion exchangers.
Description
Die Erfindung bezieht sich auf ein Verfahren zum Vorreinigen von Radionuklide enthaltenden Lösungen.The invention relates to a method for pre-purifying solutions containing radionuclides.
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 originating in particular from nuclear facilities, such as evaporator concentrates, different processes for separating complex-bound radionuclides can be used. 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.The fundamental disadvantage of the known methods is that non-active nuclides are also removed in the corresponding methods, which are present in the solution in a disproportionately higher concentration than the radioactive nuclides, so that e.g. B. when using ion exchangers or adsorbers, a frequent change of the ion exchanger or adsorber material or when using electrodes whose replacement is required.
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. Adsorbern 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 source of radioactivity is Co-60, whose complex with EDTA (ethylenediaminetetraacetic acid) is exceptionally stable. Corresponding complexes can be destroyed and Co-60 separated with the appropriate processes, in particular using ion exchangers or adsorbers. However, an undesired load occurs due to the separation of non-active nuclides and other radioactive nuclides, so that the mentioned frequent changing of the materials is necessary.
Der
Die
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 present invention is based on the object of providing a method which makes it possible, when radionuclides are to be separated from the solution, to reduce the proportion of non-active nuclides.
Zur Lösung der Aufgabe der Erfindung sieht die Erfindung ein Verfahren zum Vorreinigen von Radionuklide enthaltenden Lösungen durch Ausfällen von nichtaktiven Nukliden aus der Gruppe Fe, Mn, Ni, Cr 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 pre-purifying solutions containing radionuclides by precipitating inactive nuclides from the group Fe, Mn, Ni, Cr in a hydrothermal process and then separating the precipitated nuclides, with destruction of Co 60 complexes, in particular EDTA complexes, are generally 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, radioactive nuclides of the weak complexes of Fe, Cr, Ni, etc., whose contribution to radioactivity is small, are also deposited according to the method according to the invention, which can be described as a mild hydrothermal process compared to the deposition of Co-60. Corresponding radioactive nuclides of weak complexes also occur during pre-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.Due to the teaching according to the invention, there is the possibility of removing the non-active nuclides contained in the solution to a much greater extent, so that the subsequent removal, in particular of the radionuclide Co-60, can be carried out 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, it is provided according to the invention that citrates, oxalates or EDTA complexes of Fe, Mn, Ni and Cr are destroyed in the hydrothermal process and precipitate as hydroxides which are then removed from the solution, for example by filtration or centrifugation.
Das Hydrothermalverfahren wird insbesondere derart durchgefiihrt, 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≦220° C. for a time t, the time being between 5 minutes and 15 minutes, in particular in a range 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, among other things, the complexes of non-active nuclides and for precipitating them is built up 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, which has been subjected to the hydrothermal pre-cleaning process after filtering, is then subjected to the process mentioned at the outset in order to destroy the stable Co-60 complexes and 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 efficiency in the hydrothermal pre-cleaning process, it is possible to increase 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 to separate nuclides, nor 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.In particular, it is provided that the solution in the pressure vessel is adjusted to a pH value of pH≧7. The precipitation of the non-active nuclides can be improved at higher pH values.
Das Ausfällen der nichtaktiven Nuklide kann kontinuierlich oder im Batch-Verfahren durchgeführt werden.The non-active nuclides can be precipitated 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 makes it possible to destroy organic ingredients such as solids, in particular cotton fluff or paper particles, which means that the burden 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.
Gegenstand der Erfindung ist auch ein Verfahren zum Entfernen von Komplexen von Radionukliden, insbesondere EDTA-Komplexen von Co-60, aus Lösungen, wie Verdampferkonzentraten kerntechnischer Anlagen, umfassend die Verfahrensschritte
- Vorreinigen der Lösung durch Ausfällen von nichtaktiven Nukliden aus der Gruppe Fe, Mn, Ni, Cr in einem hydrothermalen Prozess unter Vermeidung des Zerstörens von Komplexen von zumindest Co-60 und anschließendes Abtrennen der in der Vorreinigung ausgefällten Feststoffe und
- anschließendes Zerstören zumindest der Komplexe von Co-60 und Abscheiden von Co-60.
- Pre-purification of the solution by precipitating non-active nuclides from the group Fe, Mn, Ni, Cr in a hydrothermal process while avoiding destruction of complexes of at least Co-60 and subsequent separation of the solids precipitated in the pre-purification and
- then destroying at least the complexes of Co-60 and depositing Co-60.
Dabei kann das Vorreinigen der Lösung gemäß einer oder mehrerer der zuvor erläuterten Möglichkeiten durchgeführt werden.The pre-cleaning of the solution can be carried out according to one or more of the options explained above.
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 taken from them - individually and/or in combination - but also from the following description.
In der einzigen Figur ist in Prinzipdarstellung der Verfahrensablauf zum Vorreinigen einer Radionuklide enthaltenden Lösung, wie Verdampferkonzentrat einer kerntechnischen Anlage, dargestellt. Erfindungsgemäß ist vorgesehen, dass das Verdampferkonzentrat einem Autoklaven 10, also Druckbehälter, zugeführt wird, in dem die Lösung auf eine Temperatur von in etwa 200 °C erhitzt und bei dieser Temperatur über einen Zeitraum von ca. 10 Min. gehalten wird. Durch die Temperatur von 200 °C stellt sich somit oberhalb der Lösung ein Druck von ca. 15 bar ein. Es besteht jedoch die Möglichkeit, den Druck durch z. B. geeignete Pumpen zu erhöhen.In the single figure, the process sequence for pre-cleaning a solution containing radionuclides, such as an evaporator concentrate of a nuclear facility, is shown in principle. According to the invention, the evaporator concentrate is fed to an
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 werden organische Inhaltsstoffe, wie Baumwollflusen oder Papierteilchen, zerstört.By this hydrothermal process z. B. citrates, oxalates or their complexes, as well as EDTA complexes in which non-active nuclides are present, and the nuclides are precipitated in the form of hydroxides, which are 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 12 zugeführt, bei dem es sich z. B. um eine Zentrifuge oder ein Filter handelt. Die abgeschiedenen Feststoffe werden entfernt, um sodann die von den Feststoffen befreite Lösung einem weiteren Prozess zum Entfernen von Radionukliden zuzuführen. Hierbei kann es sich um ein Verfahren wie Behandlung in überkritischem Wasser, Behandlung mit Diamantelektroden und Ionenaustauschern oder Behandlung mit Ozon und Ionentauschern handeln.After cooling, the suspension produced by the hydrothermal process is fed to a
Claims (14)
- Method for pre-purifying solutions containing radionuclides by precipitation of non-active nuclides from the group Fe, Mn, Ni, Cr in a hydrothermal process and subsequent separation of the precipitated solids.
- Method according to claim 1,
wherein
one or more non-active nuclides are precipitated as hydroxides. - Method according to claim 1 or 2,
wherein
organic constituents present in the solution, in particular solids such as cotton lint or paper fragments, are destroyed. - Method according to any of the preceding claims,
wherein
the solution is subjected during precipitation to a pressure p of p ≤ 1.8 MPa, in particular 1.0 MPa ≤ p ≤ 1.8 MPa, preferably 1.0 ≤ p ≤ 1.6 MPa. - Method according to any of the preceding claims,
wherein
the solution is set in a pressure vessel (10) to a temperature of T ≥ 150°C, in particular of 150°C ≤ T ≤ 220°C. - Method according to any of the preceding claims,
wherein
the solution is kept inside a pressure vessel over a time t at the temperature T, where t ≥ 5 min, in particular 5 min ≤ t ≤ 20 min, particularly preferably 5 min ≤ t ≤ 15 min, preferably 8 min ≤ t ≤ 12 min. - Method according to any of the preceding claims,
wherein
the solution is set to a pH value of pH ≥ 7. - Method according to any of the preceding claims,
wherein
pre-purifying is performed using a batch method or continuous method. - Method according to any of the preceding claims,
wherein
at least the precipitated nuclides are removed by filtration and/or centrifuging. - Method according to any of the preceding claims,
wherein
radionuclides are removed after precipitation and removal of non-active nuclides from the solution. - Method according to any of the preceding claims,
wherein
pre-purifying of solutions of evaporator concentrates from nuclear installations is performed. - Method according to any of the preceding claims,
wherein
solutions containing Co-60 are pre-purified. - Method for removing complexes of radionuclides, in particular EDTA complexes of Co-60, from solutions such as evaporator concentrates from nuclear installations, comprising the method steps- pre-purifying of the solution according to claim 1 by precipitation of at least non-active nuclides from the group Fe, Mn, Ni, Cr in a hydrothermal process with avoidance of the destruction of complexes of at least Co-60 and subsequent separation of the solids precipitated in pre-purifying, and- subsequent destruction at least of the complexes of Co-60 and separation of Co-60.
- Method according to claim 13, wherein pre-purifying of the solution is performed according to one or more of claims 2 to 10.
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 (2)
| Publication Number | Publication Date |
|---|---|
| EP3584800A1 EP3584800A1 (en) | 2019-12-25 |
| EP3584800B1 true EP3584800B1 (en) | 2023-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19179905.5A Active EP3584800B1 (en) | 2018-06-18 | 2019-06-13 | Method for pre-purifying solutions containing radionuclides |
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| 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) |
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| 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 |
| 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 |
| WO2013021954A1 (en) * | 2011-08-05 | 2013-02-14 | 株式会社Ｃｄｍコンサルティング | Processing method and apparatus for decreasing radioactive substance absorbed in material to safe level for 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 |
-
2018
- 2018-06-18 DE DE102018114550.0A patent/DE102018114550A1/en active Pending
-
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
Also Published As
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|---|---|
| HUE064015T2 (en) | 2024-02-28 |
| RU2754873C2 (en) | 2021-09-08 |
| JP7043458B2 (en) | 2022-03-29 |
| RU2019118658A (en) | 2020-12-17 |
| FI3584800T3 (en) | 2023-10-30 |
| EP3584800A1 (en) | 2019-12-25 |
| DE102018114550A1 (en) | 2019-12-19 |
| ES2962664T3 (en) | 2024-03-20 |
| RU2019118658A3 (en) | 2021-07-05 |
| JP2019219397A (en) | 2019-12-26 |
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