EP0022032A1 - Device and process for performing exchange reactions in storage pools for radioactive materials - Google Patents

Device and process for performing exchange reactions in storage pools for radioactive materials Download PDF

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Publication number
EP0022032A1
EP0022032A1 EP80400981A EP80400981A EP0022032A1 EP 0022032 A1 EP0022032 A1 EP 0022032A1 EP 80400981 A EP80400981 A EP 80400981A EP 80400981 A EP80400981 A EP 80400981A EP 0022032 A1 EP0022032 A1 EP 0022032A1
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EP
European Patent Office
Prior art keywords
water
basins
groups
circulation
exchanges
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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.)
Granted
Application number
EP80400981A
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German (de)
French (fr)
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EP0022032B1 (en
Inventor
René Guilloteau
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Societe Generale pour les Techniques Nouvelles SA SGN
Original Assignee
Generale Pour Les Techniques Nouvelles Sgn SA Ste
Societe Generale pour les Techniques Nouvelles SA SGN
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Priority to AT80400981T priority Critical patent/ATE6321T1/en
Publication of EP0022032A1 publication Critical patent/EP0022032A1/en
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Publication of EP0022032B1 publication Critical patent/EP0022032B1/en
Expired legal-status Critical Current

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    • 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
    • G21F9/34—Disposal of solid waste

Definitions

  • the present invention relates to a method and devices for carrying out exchanges in storage basins for radioactive substances.
  • radioactive substances for example waste or contaminated products
  • the water in these basins must undergo exchanges which are either thermal exchanges or ionic exchanges.
  • exchanges have been carried out in exchangers located outside the basins, which required the use of pumps to transport the water from the basins.
  • the present invention therefore relates to a method for carrying out exchanges on water of storage basins for radioactive substances, characterized in that said exchanges are carried out using autonomous groups immersed in said basins and that the circulation of water of said basins through said groups is carried out by known devices at low or medium pressure.
  • the present invention also relates to said autonomous exchange groups.
  • autonomous group is meant a group (or element) individualized, independent and, therefore interchangeable.
  • the autonomous group will consist of a device ensuring the circulation of the water in the basin at low or medium pressure and of one or more heat exchange elements supplied with water on the one hand. of the basin by said device ensuring the circulation of the water in the basin and by an external element ensuring the circulation of a cooling fluid.
  • exchange we mean all operations of a physical or chemical nature involving a transfer between water (or the materials present in the water) of the basins and an element responsible for ensuring a certain treatment of this water. It can be heat exchange where calories are exchanged, through a wall, between water and an external fluid; it can be a purification of water by filtration; it can be an exchange between ions contained in water and ions of an ion exchanger.
  • the exchange part 4 can simply be constituted by a filter whose object is to physically purify the water in the basin; it can also be a device comprising one or more beds of ion exchange resins.
  • exchange devices should be used in which the pressure drop in the basin water will be low enough for the supply of these devices to be provided by low or medium circulation devices. pressure.
  • said bed may advantageously have the shape of a basket in the shape of an O-ring containing the resin in the form of particles of suitable particle size. , said basket being crossed from the periphery towards its center by the water of the basin.
  • thermo and ionic exchanges (with or without filtration) which in particular makes it possible to carry out said ionic exchanges at a controlled and adequate temperature.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)

Abstract

La présente invention concerne un procédé pour réaliser des échanges sur l'eau de bassins de stockage de substances radioactives, caractérisé en ce que lesdits échanges sont effectués à l'aide de groupes autonomes (4) immergés dans lesdits bassins (1,2) et que la circulation de l'eau desdits bassin à travers lesdits groupes est effectués par des dispositifs (6-9) connus à basse ou moyenne pression; et groupes autonomes d'échange pour eau de bassin de stockage de substances radioactives.The present invention relates to a method for carrying out exchanges on water of storage basins for radioactive substances, characterized in that said exchanges are carried out using autonomous groups (4) immersed in said basins (1,2) and that the circulation of water from said basin through said groups is effected by known devices (6-9) at low or medium pressure; and autonomous exchange groups for water from a storage tank for radioactive substances.

Description

La présente invention concerne un procédé et des dispositifs pour réaliser des échanges dans les bassins de stockage de substances radioactives.The present invention relates to a method and devices for carrying out exchanges in storage basins for radioactive substances.

On sait que des substances radioactives (par exemple des déchets ou des produits contaminés) doivent être conservées dans des bassins remplis d'eau. L'eau de ces bassins doit subir des échanges qui sont soit des échanges termiques soit des échanges ioniques. Jusqu'à ce jour ces échanges étaient effectués dans des échangeurs situés en dehors des bassins ce qui nécessitait l'utilisation de pompes pour véhiculer l'eau des bassins.It is known that radioactive substances (for example waste or contaminated products) must be kept in tanks filled with water. The water in these basins must undergo exchanges which are either thermal exchanges or ionic exchanges. To date, these exchanges have been carried out in exchangers located outside the basins, which required the use of pumps to transport the water from the basins.

Il a été trouvé et c'est là l'objet de la présente invention qu'il était souhaitable d'une part que les échanges soient effectués dans des échangeurs directement plongés dans l'eau des bassins et d'autre part que lesdits échangeurs soient d'une technologie telle que la circulation de l'eau des bassins, à travers ces échangeurs, puisse être réalisée à l'aide de dispositifs à basse ou moyenne pression.It has been found and it is there the object of the present invention that it was desirable on the one hand that the exchanges are carried out in exchangers directly immersed in the water of the basins and on the other hand that said exchangers are a technology such that the circulation of water in the basins, through these exchangers, can be achieved using low or medium pressure devices.

La présente invention concerne donc un procédé pour réaliser des échanges sur l'eau de bassins de stockage de substances radioactives, caractérisé en ce que lesdits échanges sont effectués à l'aide de groupes autonomes immergés dans lesdits bassins et que la circulation de l'eau desdits bassins à travers lesdits groupes est effectuée par des dispositifs connus à basse ou moyenne pression.The present invention therefore relates to a method for carrying out exchanges on water of storage basins for radioactive substances, characterized in that said exchanges are carried out using autonomous groups immersed in said basins and that the circulation of water of said basins through said groups is carried out by known devices at low or medium pressure.

La présente invention concerne également lesdits groupes autonomes d'échange.The present invention also relates to said autonomous exchange groups.

Par groupe autonome on entend un groupe (ou un élément) individualisé, indépendant et, de ce faitinterchangeable. Ainsi lorsqu'on réalise un échange thermique le groupe autonome sera constitué d'un dispositif assurant la circulation de l'eau du' bassin à basse ou moyenne pression et d'un ou plusieurs éléments d'échanges thermiques alimentés d'une part en eau du bassin par ledit dispositif assurant la circulation de l'eau du bassin et par un élément extérieur assurant une circulation d'un fluide de refroidissement. Par échange, on entend toutes les opérations de nature physique ou chimique impliquant un transfeit entre l'eau (ou les matériaux présents dans l'eau) des bassins et un élément chargé d'assurer un certain traitement de cette eau. Il peut s'agir d'échange thermique où des calories sont échangées, à travers une paroi, entre l'eau et un fluide extérieur; il peut s'agir d'une purification de l'eau par une filtration; il peut s'agir d'un échange entre des ions contenus dans l'eau et des ions d'un échangeur ionique.By autonomous group is meant a group (or element) individualized, independent and, therefore interchangeable. Thus when a heat exchange is carried out, the autonomous group will consist of a device ensuring the circulation of the water in the basin at low or medium pressure and of one or more heat exchange elements supplied with water on the one hand. of the basin by said device ensuring the circulation of the water in the basin and by an external element ensuring the circulation of a cooling fluid. By exchange, we mean all operations of a physical or chemical nature involving a transfer between water (or the materials present in the water) of the basins and an element responsible for ensuring a certain treatment of this water. It can be heat exchange where calories are exchanged, through a wall, between water and an external fluid; it can be a purification of water by filtration; it can be an exchange between ions contained in water and ions of an ion exchanger.

L'invention sera mieux comprise en se référant à la figure unique qui représente, en coupe, le bord d'un bassin de stockage de substances radioactives dans lequel est plongé un groupe d'échange (thermique) selon l'invention.The invention will be better understood by referring to the single figure which represents, in section, the edge of a storage tank for radioactive substances in which a (thermal) exchange group according to the invention is immersed.

Sur cette figure on a schématisé :

  • - en 1 une paroi latérale verticale, généralement revêtue d'acier inoxydable, du bassin,
  • - en 2 le fond de ce bassin également revêtu d'acier inoxydable,
  • - en 3 une base, reposant sur le fond du bassin, pouvant recevoir la "partie échange" proprement dite de l'échangeur; cette base est généralement terminée à sa partie supérieure par un évasement permettant une mise en place plus aisée de la partie échange proprement dite; cette base est de préférence maintenue au fond du bassin par un dispositif à démontage à distance facile comme par exemple un dispositif à bai?nnette; enfin cette base est munie d'ouverture permettant la sortie de l'eau du bassin après passage de celle-ci dans l'échangeur,
  • - en 4 la "partie échange" proprement dite. Cette partie est par exemple un échangeur thermique tubulaire ou un échangeur ionique comportant un ou plusieurs lits d'échange; sur la figure unique on a schématisé un échangeur thermique tubulaire. Cette "partie échange" 4 se met en place sur la base 3 grâce à sa forme basse légèrement conique qui correspond à l'évasement de la base; l'extrémité haute de cette partie échange est elle-même évasée de façon à recevoir le "château" de circulation. Le fluide de refroidissement est amené à cette partie échange au moyen de tubes 5 de préférence flexibles et aisément démontables; ce fluide peut être par exemple de l'eau non polluée dont la circulation est assurée par une pompe convenable immergée ou non immergée et dont le refroidissement est assuré par un échangeur (par exemple eau/air) situé hors du bassin; sur la figure on a schématisé une telle pompe et un tel échangeur; mais ce fluide peut être également un liquide vaporisable connu.
  • - en 6 le "château" de circulation de l'eau du bassin; ce château vient s'emboîter par une partie basse conique dans l'évasement de la partie haute de 4. Ce château est essentiellement constitué par un moteur 7 situé hors du bassin qui entraine une hélice 8 laquelle assure l'aspiration de l'eau du bassin à travers une ou plusieurs ouvertures 9 et le refoulement de cette eau, à travers la partie échange 4, jusqu'à l'ouverture pratiquée dans la base 3. On peut utiliser d'autres dispositifs de circulation de l'eau que celui (moteur-hélice) représenté sur la figure ; il est cependant essentiel, pour pouvoir bénéficier de tous les avantages de l'invention, que la "partie échange" ne provoque qu'une faible perte de charge de l'eau du bassin et que, par conséquent, on puisse utiliser des "dispositifs de circulation" du type à basse ou moyenne pression.
In this figure we have schematized:
  • - in 1 a vertical side wall, generally coated with stainless steel, of the basin,
  • - in 2 the bottom of this basin also coated with stainless steel,
  • - In 3 a base, resting on the bottom of the basin, which can receive the "exchange part" proper of the exchanger; this base is generally terminated at its upper part by a widening allowing easier installation of the exchange part proper; this base is preferably held at the bottom of the basin by a device with easy disassembly at a distance such as for example a bayonet device; finally, this base is provided with an opening allowing the water to leave the basin after it has passed through the exchanger,
  • - in 4 the "exchange part" proper. This part is for example a tubular heat exchanger or an ion exchanger comprising one or more exchange beds; in the single figure is shown schematically a tubular heat exchanger. This "exchange part" 4 is put in place on the base 3 thanks to its slightly conical low shape which corresponds to the flaring of the base; the upper end of this exchange part is itself flared so as to receive the "castle" of circulation. The cooling fluid is brought to this exchange part by means of tubes 5, preferably flexible and easily removable; this fluid can be, for example, unpolluted water, the circulation of which is ensured by a suitable submerged or non-submerged pump and the cooling of which is provided by an exchanger (for example water / air) situated outside the basin; in the figure we schematized such a pump and such an exchanger; but this fluid can also be a known vaporizable liquid.
  • - in 6 the "castle" of water circulation in the basin; this castle is fitted by a conical lower part in the flaring of the upper part of 4. This castle is essentially constituted by a motor 7 located outside the basin which drives a propeller 8 which ensures the suction of water from basin through one or more openings 9 and the discharge of this water, through the exchange part 4, to the opening made in the base 3. Other water circulation devices can be used than that ( motor-propeller) shown in the figure; it is however essential, in order to be able to benefit from all the advantages of the invention, that the "exchange part" causes only a small pressure drop in the water of the basin and that, consequently, it is possible to use "devices circulation "type of low or medium pressure.

La partie échange 4 peut être simplement constituée par un filtre dont l'objet est d'épurer physiquement l'eau du bassin; elle peut être également un dispositif comportant un ou plusieurs lits de résines d'échanges ioniques.The exchange part 4 can simply be constituted by a filter whose object is to physically purify the water in the basin; it can also be a device comprising one or more beds of ion exchange resins.

- Dans tous les cas, il conviendra d'employer des dispositifs d'échanges dans lesquels la perte de charge de l'eau du bassin sera suffisamment faible pour que l'alimentation de ces dispositifs soit assurée par des appareils de circulation à basse ou moyenne pression. Ainsi par exemple dans le cas où la partie échange est constituée par un lit de résines d'échanges ioniques, ledit lit pourra avantageusement avoir la forme d'un panier en forme d'un cylindre torique contenant la résine sous forme de particules de granulométrie convenable, ledit panier étant traversé de la périphérie vers son centre par l'eau du bassin.- In all cases, exchange devices should be used in which the pressure drop in the basin water will be low enough for the supply of these devices to be provided by low or medium circulation devices. pressure. Thus, for example, in the case where the exchange part consists of a bed of ion exchange resins, said bed may advantageously have the shape of a basket in the shape of an O-ring containing the resin in the form of particles of suitable particle size. , said basket being crossed from the periphery towards its center by the water of the basin.

Les avantages des nouveaux groupes d'échange plongés dans les bassins sont nombreux; on peut citer par exemple :

  • - l'absence de circulation de l'eau polluée des bassins à l'extérieur de ces bassins,
  • - le fait que l'on n'ait pas à utiliser, pour faire circuler l'eau des bassins, de pompes, avec presse-étoupe et des vannes, délivrant de l'eau sous pression élevée,
  • - la facilité de montage et de démontage des groupes d'échange, et l'autonomie énergétique que peut assurer, dans certains cas, un système de récupération d'énergie mécanique jumelé au système de refroidissement de l'eau des bassins.
The advantages of the new exchange groups immersed in the basins are numerous; we can quote for example:
  • - the absence of circulation of polluted water from the basins outside these basins,
  • - the fact that one does not have to use, to circulate the water of the basins, pumps, with stuffing box and valves, delivering water under high pressure,
  • - the ease of assembly and disassembly of the exchange groups, and the energy autonomy that can ensure, in some cases, a mechanical energy recovery system combined with the cooling system of the water in the basins.

Il est également possible selon la présente invention de réaliser, dans un même échangeur, des échanges thermiques et ioniques (avec ou sans filtration) ce qui permet notamment d'effectuer lesdits échanges ioniques à une température contrôlée et adéquate.It is also possible according to the present invention to carry out, in the same exchanger, thermal and ionic exchanges (with or without filtration) which in particular makes it possible to carry out said ionic exchanges at a controlled and adequate temperature.

Claims (5)

1. Procédé pour réaliser des échanges sur l'eau de bassins de stockage de substances radioactives, caractérisé en ce que lesdits échanges sont effectués à l'aide de groupes autonomes immergés dans lesdits bassins et que la circulation de l'eau desdits bassins à travers lesdits groupes est effectuée par des dispositifs connus à basse ou moyenne pression.1. A method for carrying out exchanges on water of storage basins for radioactive substances, characterized in that said exchanges are carried out using autonomous groups immersed in said basins and that the circulation of water from said basins through said groups are carried out by known devices at low or medium pressure. 2. Procédé selon la revendication 1, caractérisé en ce qu'on y réalise des échanges thermiques, ioniques et des filtrations.2. Method according to claim 1, characterized in that there is carried out thermal, ionic exchanges and filtrations. 3. Groupes autonomes d'échange pour eau de bassin de stockage de substances radioactives, caractérisés en ce qu'ils sont plongés directement dans l'eau desdits bassins et que la circulation de l'eau desdits bassins à travers le dispositif d'échange desdits groupes est effectuée par des dispositifs connus à basse ou moyenne pression.3. Autonomous exchange groups for water from a storage tank for radioactive substances, characterized in that they are immersed directly in the water of said tanks and that the circulation of water from said tanks through the device for exchanging said groups is carried out by known devices at low or medium pressure. 4. Groupes selon la revendication 3, caractérisés en ce qu'on y réalise des échanges thermiques et/ou ioniques.4. Groups according to claim 3, characterized in that there is carried out thermal and / or ionic exchanges. 5. Groupes selon l'une des revendications 3 et 4, caractérisés en ce qu'ils sont aisément démontables, par simple emboîtement par exemple, de façon à permettre un changement facile du dispositif d'échange proprement dit.5. Groups according to one of claims 3 and 4, characterized in that they are easily removable, by simple interlocking for example, so as to allow an easy change of the actual exchange device.
EP80400981A 1979-07-02 1980-06-30 Device and process for performing exchange reactions in storage pools for radioactive materials Expired EP0022032B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80400981T ATE6321T1 (en) 1979-07-02 1980-06-30 DEVICE AND METHOD FOR CARRYING OUT EXCHANGE REACTIONS IN RADIOACTIVE MATERIAL STORAGE POOLS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7917159 1979-07-02
FR7917159A FR2460529A1 (en) 1979-07-02 1979-07-02 NEW EXCHANGE GROUPS FOR RADIOACTIVE SUBSTANCES STORAGE BASINS

Publications (2)

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EP0022032A1 true EP0022032A1 (en) 1981-01-07
EP0022032B1 EP0022032B1 (en) 1984-02-15

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EP80400981A Expired EP0022032B1 (en) 1979-07-02 1980-06-30 Device and process for performing exchange reactions in storage pools for radioactive materials

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US (1) US4511500A (en)
EP (1) EP0022032B1 (en)
JP (1) JPS5614194A (en)
AT (1) ATE6321T1 (en)
CA (1) CA1170377A (en)
DE (1) DE3066579D1 (en)
FR (1) FR2460529A1 (en)

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DE19640297A1 (en) * 1996-09-30 1997-12-18 Siemens Ag Nuclear fuel element cooling pond decontamination system
DE19907914C1 (en) * 1999-02-24 2000-06-29 Siemens Ag Loading transport container with fuel element, especially spent nuclear fuel element, comprises use of transfer lock which is sealed and freed from pond water before fuel element transfer to transport container outside pond
US20080137794A1 (en) * 2005-12-01 2008-06-12 Nac International, Inc. Systems and methods for loading and transferring spent nuclear fuel
US9193606B2 (en) * 2013-08-12 2015-11-24 Institute Of Nuclear Energy Research, Atomic Energy Council Device for purifying a water sink
DE102014008727A1 (en) * 2014-08-18 2016-02-18 Westinghouse Electric Germany Gmbh Fuel element storage tank cooling module and fuel storage tank cooling system
MX2019010264A (en) * 2017-04-20 2019-10-09 Dominion Eng Inc Modular water purification system for nuclear power plants.

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FR1575859A (en) * 1968-06-10 1969-07-25
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Also Published As

Publication number Publication date
CA1170377A (en) 1984-07-03
US4511500A (en) 1985-04-16
JPS5614194A (en) 1981-02-10
ATE6321T1 (en) 1984-03-15
EP0022032B1 (en) 1984-02-15
DE3066579D1 (en) 1984-03-22
FR2460529B1 (en) 1984-01-06
JPH0135317B2 (en) 1989-07-25
FR2460529A1 (en) 1981-01-23

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