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EP0355514A2 - Procédé pour conditionner les lessives radioactives d'évaporation provenant d'installations nucléaires - Google Patents

Procédé pour conditionner les lessives radioactives d'évaporation provenant d'installations nucléaires Download PDF

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Publication number
EP0355514A2
EP0355514A2 EP89114316A EP89114316A EP0355514A2 EP 0355514 A2 EP0355514 A2 EP 0355514A2 EP 89114316 A EP89114316 A EP 89114316A EP 89114316 A EP89114316 A EP 89114316A EP 0355514 A2 EP0355514 A2 EP 0355514A2
Authority
EP
European Patent Office
Prior art keywords
evaporator
final storage
concentrate
repository
storage container
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Withdrawn
Application number
EP89114316A
Other languages
German (de)
English (en)
Other versions
EP0355514A3 (fr
Inventor
Dieter Dipl.-Ing. Feyerbacher
Stefan Dipl.-Ing. Rosenberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nukem GmbH
Original Assignee
Nukem GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nukem GmbH filed Critical Nukem GmbH
Publication of EP0355514A2 publication Critical patent/EP0355514A2/fr
Publication of EP0355514A3 publication Critical patent/EP0355514A3/fr
Withdrawn legal-status Critical Current

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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
    • G21F9/06—Processing
    • G21F9/08—Processing by evaporation; by distillation

Definitions

  • the present invention relates to a method for conditioning radioactive evaporator liquors, optionally together with spherical resins, diatomaceous earth and filter aids from nuclear plants for the purpose of confinement by disposal in a heatable repository package.
  • Radioactive evaporator liquors or mixtures of evaporator liquors with spherical resins, diatomaceous earth and filter aids are usually already used in the nuclear facilities, e.g. in nuclear power plants, concentrated to a dry matter content of approx. 20-25% by weight. They have to be concentrated further by evaporation in order to prepare them for disposal in appropriate containers.
  • DE-PS 32 00 331 describes a process by which evaporator concentrates are dried in a heated repository vessel. Disadvantages of this process, however, are the relatively low evaporation rate and the formation of cavities, some of which are of considerable size, which are also distributed irregularly in the solidified product. This results in poor utilization of the container volume and an unfavorable economy.
  • DE-OS 3544270 describes a drying process in which microwave energy is used for drying, liquids and solutions being sprayed into the container and solidified in one step. This process is very complex and therefore has economic disadvantages.
  • This object is achieved in that the liquor or the mixture is first concentrated to 60 to about 85% by weight dry matter content in an evaporator, then the still flowable concentrate is poured into the heatable final storage container, and finally the concentrate in the final storage container at least the maximum temperature occurring in the repository is heated and the steam produced is suctioned off under reduced pressure until a solid floor body with a smooth surface has formed.
  • the concentrate is preferably heated to the maximum temperature occurring in the repository.
  • radioactive evaporator liquor (11), spherical resins (12) and filter aids (13) from nuclear power plants or other nuclear facilities are conveyed into an evaporator (1) which is operated with a stirrer (9) , a droplet separator (10), a condenser (7) and a distillate collector (8) is provided, from which the distillate can be removed in a controlled manner.
  • the mixture (3) is heated with stirring and concentrated until the concentrate contains 60 to about 85% by weight of dry substance.
  • the residual water still present in the concentrate which is viscous at the evaporator temperature and solid at room temperature, consists essentially of water of crystallization of the salt component.
  • the viscous concentrate is then discharged in portions into a final storage container (2) provided with a heater (4).
  • the first portion (5) is heated by the supply of heat as long and so high that the crystal water content is expelled from the concentrate to such an extent that a solid monolithic soil body with a smooth surface and without powdery components forms in the final storage container (2).
  • This floor must remain firm even at the maximum temperature occurring in the repository, so that the evaporation temperature in the repository package (2) must be at least as high as the maximum temperature to be expected in the repository. Evaporation temperatures of about 70 ° C.
  • a boiling water reactor-simulate mixture of evaporator liquors, ion exchanger spherical resins and filter aids was first concentrated in an evaporator.
  • the resulting concentrate had the composition: Na2SO4 50% by weight Spherical resins 15% by weight Na3PO4 5% by weight Ca3 (PO4) 2 1.5% by weight Fe2O3 1.5% by weight Other 2.0% by weight Residual water 25% by weight
  • This concentrate was drained in portions into a heated repository and solidified at 80 o C at 300 HPa.
  • the end product had a residual water content of about 8% and had a microporous structure without voids and inhomogeneities.
  • the end product surface was smooth, the abrasion and pressure resistance good.
  • the geometric shape did not change during acceleration tests. Heating tests at 70 o C, which correspond to final storage conditions, showed that the solidification product did not change its consistency.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Fertilizers (AREA)
EP19890114316 1988-08-17 1989-08-03 Procédé pour conditionner les lessives radioactives d'évaporation provenant d'installations nucléaires Withdrawn EP0355514A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883827897 DE3827897A1 (de) 1988-08-17 1988-08-17 Verfahren zum konditionieren von radioaktiven verdampferlaugen aus kerntechnischen anlagen
DE3827897 1988-08-17

Publications (2)

Publication Number Publication Date
EP0355514A2 true EP0355514A2 (fr) 1990-02-28
EP0355514A3 EP0355514A3 (fr) 1991-12-27

Family

ID=6361022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890114316 Withdrawn EP0355514A3 (fr) 1988-08-17 1989-08-03 Procédé pour conditionner les lessives radioactives d'évaporation provenant d'installations nucléaires

Country Status (2)

Country Link
EP (1) EP0355514A3 (fr)
DE (1) DE3827897A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995026556A1 (fr) * 1994-03-25 1995-10-05 British Nuclear Fuels Plc Sechage de dechets radioactifs ou toxiques humides ou d'autres dechets humides dangereux
ES2184540A1 (es) * 1999-10-26 2003-04-01 Equipos Nucleares Sa Procedimiento para tratamiento de residuos liquidos radiactivos y su almacenamiento posterior.
EP2733704A3 (fr) * 2012-11-16 2016-06-29 Hartmut Grunau Récipient de stockage final et procédé de séchage d'objets contaminés dans un récipient de stockage final ainsi que procédé de fabrication de celui-ci

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19913103C1 (de) * 1999-03-23 2000-12-14 Kernkraftwerke Gundremmingen B Verfahren und Vorrichtung zur Aufbereitung von Verdampferkonzentraten aus kerntechnischen Anlagen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1614497A1 (de) * 1967-04-12 1970-08-20 Siemens Ag Verfahren zur Konzentrierung radioaktiver Abfaelle
FR2307342A1 (fr) * 1975-04-11 1976-11-05 Licentia Gmbh Procede de traitement de concentres radioactifs
GB2113902A (en) * 1982-01-08 1983-08-10 Nuklear Service Gmbh Gns Process and apparatus for treating moist radioactive wastes
GB2163894A (en) * 1984-08-16 1986-03-05 Nuklear Service Gmbh Gns Preparing radioactive waste solids and evaporator concentrates for final storage in permanent storage containers
DE3432103A1 (de) * 1984-08-31 1986-03-13 Kraftwerk Union AG, 4330 Mülheim Verfahren zum volumenreduzierung von radioaktiv beladenen fluessigkeiten und rippenkoerper zur verwendung dabei

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088624B (de) * 1959-06-27 1960-09-08 Ver Kesselwerke Ag Verfahren und Vorrichtung zum Entfernen von radioaktiven Verunreinigungen aus Fluessigkeiten, insbesondere aus Wasser, durch Eindampfen
DE3029147A1 (de) * 1980-07-31 1982-02-25 Kraftwerk Union AG, 4330 Mülheim Verfahren und anlage zur behandlung radioaktiver rueckstaende aus borathaltigen abwaessern

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1614497A1 (de) * 1967-04-12 1970-08-20 Siemens Ag Verfahren zur Konzentrierung radioaktiver Abfaelle
FR2307342A1 (fr) * 1975-04-11 1976-11-05 Licentia Gmbh Procede de traitement de concentres radioactifs
GB2113902A (en) * 1982-01-08 1983-08-10 Nuklear Service Gmbh Gns Process and apparatus for treating moist radioactive wastes
GB2163894A (en) * 1984-08-16 1986-03-05 Nuklear Service Gmbh Gns Preparing radioactive waste solids and evaporator concentrates for final storage in permanent storage containers
DE3432103A1 (de) * 1984-08-31 1986-03-13 Kraftwerk Union AG, 4330 Mülheim Verfahren zum volumenreduzierung von radioaktiv beladenen fluessigkeiten und rippenkoerper zur verwendung dabei

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995026556A1 (fr) * 1994-03-25 1995-10-05 British Nuclear Fuels Plc Sechage de dechets radioactifs ou toxiques humides ou d'autres dechets humides dangereux
ES2184540A1 (es) * 1999-10-26 2003-04-01 Equipos Nucleares Sa Procedimiento para tratamiento de residuos liquidos radiactivos y su almacenamiento posterior.
EP2733704A3 (fr) * 2012-11-16 2016-06-29 Hartmut Grunau Récipient de stockage final et procédé de séchage d'objets contaminés dans un récipient de stockage final ainsi que procédé de fabrication de celui-ci
EP3203482A1 (fr) * 2012-11-16 2017-08-09 Hartmut Grunau Récipient de stockage ultime et procédé de séchage d'objets contaminés dans un récipient de stockage ultime

Also Published As

Publication number Publication date
EP0355514A3 (fr) 1991-12-27
DE3827897A1 (de) 1990-03-22
DE3827897C2 (fr) 1992-07-30

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