EP0895250B1 - Abschirmbehälter für den Transport und/oder die Lagerung abgebrannter Brennelemente - Google Patents
Abschirmbehälter für den Transport und/oder die Lagerung abgebrannter Brennelemente Download PDFInfo
- Publication number
- EP0895250B1 EP0895250B1 EP98113968A EP98113968A EP0895250B1 EP 0895250 B1 EP0895250 B1 EP 0895250B1 EP 98113968 A EP98113968 A EP 98113968A EP 98113968 A EP98113968 A EP 98113968A EP 0895250 B1 EP0895250 B1 EP 0895250B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- residual moisture
- molecular sieve
- adsorber
- moisture adsorber
- 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.)
- Expired - Lifetime
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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
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
Definitions
- the invention relates to a shielding container for the Transport and / or storage of spent fuel from nuclear power plants, - with tank jacket, tank bottom and at least one container lid, which shielding container a plurality of parking spaces in its interior for the spent fuel elements, the container lid with at least one closable Through hole is provided.
- - Storage means in Within the scope of the invention in particular the intermediate storage.
- the shielding container according to the invention in particular for the transport and / or storage of spent Fuel elements is provided, it is also within the scope of Invention, other radiating, in particular neutron radiating Transport objects in the shielding container and / or to store.
- Shielding containers of the type mentioned are in different Embodiments known.
- the in the shielding container fuel elements or fuel rods to be set can in the defective state during their reactor use and / or their subsequent wet storage, usually one absorb a significant amount of moisture or water. It is understood that this moisture is not in the Shielding container can remain as it is otherwise during the temporary storage, which usually lasts several decades to signs of corrosion on shielding container components, especially in the area of shielding container seals, would come. This would be long term the tightness of the shielding container is endangered. For this The reason is within the framework of the measures known from practice to reduce the moisture content in the Container interior vacuum drying of this container interior carried out.
- Vacuum drying is usually done via at least one provided in the container lid Through hole carried out, the moisture particles or water particles over the at least one Through hole are deducted.
- the main part moisture can be removed, nonetheless however, an annoying residual moisture in the shielding container remains.
- Fuel rods or fuel elements do not have to be with one negligible proportion of residual moisture that cannot be removed by vacuum drying. These are still present in the fuel rods or fuel elements Residual moisture can remain during the several decades, for example 40 years, permanent storage in the container interior escape and there, especially in Area of the seals of the shielding container cause. It is understood that these signs of corrosion the tightness of the shielding container can affect.
- the invention is based on the technical problem a shielding container of the type mentioned specify where a reliable and complete Removal of residual moisture in a simple and inexpensive manner Way can be realized and that in terms of safety Regarding all requirements.
- the invention teaches to solve this technical problem a shielding container of the type described above, the is characterized in that in the container interior at least one residual moisture adsorber with molecular sieve is provided and that the residual moisture adsorber is essentially is arranged vertically below the through hole. -
- the spent fuel is in the shielding container introduced and then the shielding container with closed at least one container lid.
- the through hole preferably closed with a blind plug.
- the molecular sieve is an embodiment of the invention via a through hole in the container interior introduced which through hole also as a drainage hole is used in vacuum drying. It is within the scope of the invention that the container lid May have a plurality of through holes, which is expedient can be closed with a blind plug. It it goes without saying that a plurality also exist in the container interior of residual moisture adsorbers with assigned molecular sieves can be introduced.
- Molecular sieve means in the context of the invention in particular natural and synthetic zeolites with strong adsorption capacity for gases and vapors.
- Such molecular sieves usually have uniform pore diameters, which in the order of magnitude of the diameter of the molecules to be adsorbed lie. Because of the large inner surface this molecular sieve has a high adsorption capacity reached. This adsorption effect is based on the fact that only such substances are adsorbed to the molecular sieves, whose molecules can penetrate the pores. It understands themselves that the used in the context of the invention Molecular sieves primarily on the adsorption of Water molecules are aligned.
- the receptacle walls consist of a sintered Metal, suitably sintered stainless steel, which sintered metal walls for the moisture particles, in particular Water particles that are permeable.
- the scope of the invention of particular importance are the dimensions of the Residual moisture adsorbers on the one hand and the dimensions of the Through hole on the other hand set up with the proviso that the residual moisture adsorber through the through hole insertable into the shielding container and out of the shielding container is executable.
- the dimensions of the Residual moisture adsorbers on the one hand and the dimensions of the Through hole on the other hand set up with the proviso that the residual moisture adsorber through the through hole insertable into the shielding container and out of the shielding container is executable.
- a through hole which through hole also expediently as Dewatering opening used in vacuum drying has been.
- the residual moisture adsorber via the through-hole to the shielding container can be removed or replaced.
- the invention becomes the receptacle of the residual moisture adsorber introduced into the interior of the shielding container and then the shielding container with the container lid locked.
- the molecular sieve or the molecular sieve mass is about a through hole in the substantially perpendicular receptacle arranged below the through hole introduced and then the through hole expediently closed with a blind plug.
- the molecular sieve according to one long adsorption period through the passage opening removable residual adsorber, especially suction. It is understood that the molecular sieve or the molecular sieve mass be exchanged in the manner described can.
- the invention is based on the knowledge that the introduction described residual moisture in a shielding container Surprisingly complete and reliable with an inventive Residual moisture adsorber can be removed. It is particularly surprising that the Relatively firmly integrated in defective fuel rods or trapped moisture is removed completely.
- the residual moisture adsorber according to the invention with molecular sieve are characterized by a large one in the shielding containers Adsorption capacity even at relatively low Moisture or water content and at high temperatures out. It is particularly advantageous that the molecular sieve is sufficiently radiation-resistant and also chemical is largely inert. Any chemical or physical processes resulting in negative impairments the shielding container or its function will not take place.
- the invention is also based on the knowledge on the basis that an inventive residual moisture adsorber can be used without complex changes the shielding container. As far as draws the invention through simplicity and little effort out. Usual and in traffic can without problems Shielding container with a residual moisture adsorber according to the invention be retrofitted. The one in the shielding container available space for the fuel elements is not reduced if according to the preferred embodiment the invention of the residual moisture adsorber in the area of anyway available space in the immediate vicinity Is arranged near the container shell. As a result, can the residual moisture in the shielding container according to the invention be removed very completely, so that long term corrosion on container components does not occur.
- FIGS. 1 and 2 there is a shielding container 1 for transportation and / or the storage of spent fuel elements 2 Nuclear power plants shown.
- the shielding container 1 exists from a container jacket 3, a container bottom 4 and a Container lid 5.
- the shielding container 1 has in its Container interior 6 a plurality of parking spaces for the spent fuel 2.
- the container lid 5 is in the embodiment of FIGS. 1 and 2 with a through hole which can be closed by a blind plug 13 8 provided.
- the residual moisture adsorber 9 with a receptacle 11 for the molecular sieve 10 equipped, which receptacle 11 receptacle walls 12, which is for moisture particles or water vapor are permeable.
- the receptacle walls 12 suitably consist of sintered Stainless steel.
- the residual moisture adsorber 9 is vertically below the through hole 8 is arranged.
- the Residual moisture adsorber 9 has a circular cross section.
- the length of a residual moisture adsorber according to the invention 9 essentially the height, preferably at least two thirds of the height of the container interior 6.
- the residual moisture adsorber 9th and the associated through hole 8 preferably on the outer edge of the container interior 6 or in the area of the container jacket 3 are arranged. It is within the scope of the invention that two or more residual moisture adsorbers 9 in the container interior 6 are provided and each residual moisture adsorber 9 a corresponding through hole 8 assigned.
- the diameter of the Residual moisture adsorbers 9 run slightly smaller than the diameter of the through hole 8.
- the fuel elements 2 are set have been applied and the container lid 5 vacuum drying of the interior of the container 6 performed through the through hole 8. Subsequently can the entire residual moisture adsorber 9 with receptacle 11 and molecular sieve 10 therein via the through hole 8 into the container interior 6 be introduced.
- the residual moisture adsorber 9 vertically below the through hole 8 arranged.
- the residual moisture adsorber 9 is attached to one Blind plug 13, which is used to close the through hole serves, attached.
- the residual moisture adsorber 9 introduced together with the blind plug 13, the Through hole 8 is closed at the same time. After a corresponding period of time can without problems the blind plug 13 together with the residual moisture adsorber 9 from the Shielding container 1 are pulled. The residual moisture adsorber 9 can then, if necessary, by a new or regenerated residual moisture adsorber be replaced. It is understood that the container lid 5 does not have to be removed for this.
- the embodiment according to FIG. 1 stands out by the advantage that the anyway in the area of the container shell 3 available space for the Residual moisture adsorber 9 is used, so that no space for the fuel assembly 2 is lost.
- FIG. 2 shows a shielding container 1 according to the invention, where a larger molecular sieve mass to remove the Residual moisture is required.
- the residual moisture adsorber points here 9 or the receptacle 11 a larger diameter than the through hole 8.
- the open one above Receptacle 11 is initially without a molecular sieve open shielding container 1 into the container interior 6 introduced.
- the container lid 5 is then placed on.
- the subsequent vacuum drying preferably takes place via the through hole 8 instead.
- the receptacle 11 then closed with a stopper 14. After that the through hole 8 is closed with a blind plug 13.
- the molecular sieve 10 can be removed or exchanged, so after Removing the blind plug 13 and the plug 14 the molecular sieve mass deducted, preferably suctioned or blown out become.
- the receptacle 11 expediently has a gripper head 15 for crane transport.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Packages (AREA)
- Drying Of Solid Materials (AREA)
- Closures For Containers (AREA)
Description
- Fig. 1
- ausschnittsweise einen Querschnitt durch einen erfindungsgemäßen Abschirmbehälter in einer ersten Ausführungsform,
- Fig. 2
- den Gegenstand gemäß Fig. 1 in einer anderen Ausführungsform.
Claims (6)
- Abschirmbehälter (1) für den Transport und/oder die Lagerung abgebrannter Brennelemente (2) aus Kernkraftwerken, - mit Behältermantel (3), Behälterboden (4) und zumindest einem Behälterdeckel (5), welcher Abschirmbehälter (1) in seinem Behälterinnenraum (6) eine Mehrzahl von Einstellplätzen für die abgebrannten Brennelemente (2) aufweist, wobei der Behälterdeckel (5) mit zumindest einer verschließbaren Durchgangsbohrung (8) versehen ist, dadurch gekennzeichnet, daß in dem Behälterinnenraum (6) zumindest ein Restfeuchteadsorber (9) mit Molekularsieb (10) vorgesehen ist und daß der Restfeuchteadsorber (9) im wesentlichen senkrecht unterhalb der Durchgangsbohrung (8) angeordnet ist.
- Abschirmbehälter nach Anspruch 1, dadurch gekennzeichnet, daß der Restfeuchteadsorber (9) mit einem Aufnahmebehälter (11) für das Molekularsieb (10) ausgerüstet ist, welcher Aufnahmebehälter (11) für Feuchtigkeitsteilchen durchlässige Aufnahmebehälterwände (12) aufweist.
- Abschirmbehälter nach Anspruch 2, dadurch gekennzeichnet, daß die Aufnahmebehälterwände (12) aus einem gesinterten Metall, vorzugsweise gesintertem Edelstahl, bestehen.
- Abschirmbehälter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Abmessungen des Restfeuchteadsorbers (9) einerseits und die Abmessungen der Durchgangsbohrung (8) andererseits mit der Maßgabe eingerichtet sind, daß der Restfeuchteadsorber (9) über die Durchgangsbohrung (8) in den Abschirmbehälter (1) einführbar und aus dem Abschirmbehälter (1) ausführbar ist.
- Abschirmbehälter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Molekularsieb (10) über die Durchgangsbohrung (8) in den Restfeuchteadsorber (9) einfüllbar ist.
- Abschirmbehälter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Molekularsieb (10) über die Durchgangsbohrung (8) aus dem Restfeuchteadsorber (9) abziehbar, insbesondere absaugbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19733283A DE19733283C2 (de) | 1997-08-01 | 1997-08-01 | Abschirmbehälter für den Transport und/oder die Lagerung abgebrannter Brennelemente |
DE19733283 | 1997-08-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0895250A1 EP0895250A1 (de) | 1999-02-03 |
EP0895250B1 true EP0895250B1 (de) | 2002-04-17 |
Family
ID=7837679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98113968A Expired - Lifetime EP0895250B1 (de) | 1997-08-01 | 1998-07-25 | Abschirmbehälter für den Transport und/oder die Lagerung abgebrannter Brennelemente |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0895250B1 (de) |
DE (1) | DE19733283C2 (de) |
ES (1) | ES2175568T3 (de) |
TW (1) | TW365678B (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879015B1 (fr) * | 2004-12-07 | 2007-03-23 | Cogema Logistics Sa | Dispositif pour assainir et/ou securiser une enceinte de confinement definie dans un dispositif de transport et/ou de stockage de matieres radioactives |
ES2909609T3 (es) * | 2019-09-16 | 2022-05-09 | Gns Ges Fuer Nuklear Service Mbh | Procedimiento para el secado de recipientes de transporte y/o de almacenamiento y recipiente de transporte y/o de almacenamiento |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3222764A1 (de) * | 1982-06-18 | 1983-12-22 | GNS Gesellschaft für Nuklear-Service mbH, 4300 Essen | Abschirmbehaelter fuer die aufnahme von radioaktiven abfaellen |
DE3427258A1 (de) * | 1984-07-24 | 1986-01-30 | Kraftwerk Union AG, 4330 Mülheim | Einrichtung zur abtrennung und zum konditionieren von kontaminierten feststoffen |
US4882094A (en) * | 1988-02-26 | 1989-11-21 | Foster-Miller, Inc. | Separation system for dewatering radioactive waste materials |
DE3904149C2 (de) * | 1989-02-11 | 1994-01-20 | Kernforschungsz Karlsruhe | Vorrichtung an Behältern mit radioaktiven Abfällen zur Verringerung des Innendrucks durch Wasserstoffbildung |
JP2635419B2 (ja) * | 1989-08-31 | 1997-07-30 | 株式会社神戸製鋼所 | 放射性固体廃棄物の乾燥装置 |
DE4023162C2 (de) * | 1990-07-20 | 1996-08-29 | Siemens Ag | Fülladapter zur Infaßtrocknung von flüssigen radioaktiven Abfällen |
DE4135066C1 (de) * | 1991-10-24 | 1993-04-01 | Gns Gesellschaft Fuer Nuklear-Service Mbh, 4300 Essen, De |
-
1997
- 1997-08-01 DE DE19733283A patent/DE19733283C2/de not_active Expired - Lifetime
-
1998
- 1998-06-12 TW TW087109398A patent/TW365678B/zh active
- 1998-07-25 EP EP98113968A patent/EP0895250B1/de not_active Expired - Lifetime
- 1998-07-25 ES ES98113968T patent/ES2175568T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE19733283A1 (de) | 1999-02-18 |
DE19733283C2 (de) | 1999-08-05 |
TW365678B (en) | 1999-08-01 |
ES2175568T3 (es) | 2002-11-16 |
EP0895250A1 (de) | 1999-02-03 |
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