EP0978849B1 - Endlagerbehälter für abgebrannte Brennelemente aus Kernkraftwerken - Google Patents
Endlagerbehälter für abgebrannte Brennelemente aus Kernkraftwerken Download PDFInfo
- Publication number
- EP0978849B1 EP0978849B1 EP98114501A EP98114501A EP0978849B1 EP 0978849 B1 EP0978849 B1 EP 0978849B1 EP 98114501 A EP98114501 A EP 98114501A EP 98114501 A EP98114501 A EP 98114501A EP 0978849 B1 EP0978849 B1 EP 0978849B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- repository
- cover
- storage container
- intermediate storage
- 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
Links
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
- G21F5/00—Transportable or portable shielded containers
- G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal
- G21F5/008—Containers for fuel elements
-
- 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
-
- 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
- G21F5/12—Closures for containers; Sealing arrangements
Definitions
- the invention relates to a repository for spent Fuel elements from nuclear power plants. - Usually and in accordance with the regulations, spent fuel assemblies from nuclear power plants first in appropriate containers temporarily stored in an interim storage facility. Subsequently the spent fuel for final disposal usually stored in an underground repository.
- the intermediate storage container is usually with a double lid arrangement equipped which cover arrangement sealing devices in the form of metal seals and elastomer seals.
- the tightness of the Containers are continuously monitored. This continuous Monitoring and maintenance is labor-intensive, personnel-intensive and expensive. There may also be manual maintenance work on the containers required maintenance personnel becomes an inevitable Exposed to radiation.
- the Fuel assemblies from the interim storage containers to final storage containers reload.
- the fuel assemblies are initially conditioned in a conditioning system and the conditioned Fuel rods are in the conditioning system filled into the repository. It goes without saying that this reloading of the fuel elements is complex. Also this results in a disadvantageous radiation exposure for the staff involved.
- the invention is based on the technical problem specify a storage container with which the above Disadvantages set out can be avoided and in particular regarding the long-term storage of fuel elements all tightness criteria are met and that for the intermediate storage of the fuel elements is suitable as well can be fed directly to final storage after the intermediate storage is.
- the invention teaches to solve this technical problem a repository for spent fuel Nuclear power plants, according to claim 1.
- the scope of the invention the repository container is of particular importance directly in the water basin or reactor basin of the nuclear power plant filled with the fuel rods. It is within the scope of the invention that at the top of the primary cover a drainage line opening is formed. Then, preferably outside the water basin or reactor basin, a drainage or drying of Repository container carried out via the drainage line.
- the drainage line is expedient pressurized with a vacuum.
- the secondary cover according to the invention welded to the container jacket. Thereupon the final storage container temporarily stored. It is also in the Framework of the invention that drainage, drying and The secondary cover is only welded when the final storage container is already in an intermediate storage container located.
- the invention Repository without further reloading the fuel rods are fed directly to final storage or placed in a repository.
- a receptacle for Fuel rods means that both used for intermediate storage becomes immediately as well as after the intermediate storage can be sent to final storage.
- the intermediate storage are expediently a plurality of the inventive Repository container in an intermediate storage container set.
- the container jacket and the bottom of the repository made of steel, preferably made of fine grain steel.
- Fine grain steel means in the context of the invention in particular a steel containing 0.15% carbon, 1.5% manganese and 0.75% nickel (15 MnNi 6 3). This material fulfills in advantageously all strength requirements and the weldability.
- the container jacket of the final storage container is expediently cylindrical.
- the invention is the primary lid in the container jacket screwed in.
- the primary cover prefers a trapezoidal thread.
- the primary cover from the same material as the container jacket and the container bottom are, preferably made of steel, preferably made of fine grain steel.
- the primary cover neutron moderating and / or radiation absorbing Components on. This is conveniently on the primary cover a shielding plate made of neutron moderating and / or absorbent materials. So far it is within the scope of the invention that the primary cover a Shielding function with regard to the gamma radiation and / or Neutron radiation takes over.
- a shielding plate is preferred arranged below the primary cover.
- P refers the encapsulated shielding plate is immediately on connected the primary cover.
- the shielding plate can for example as a neutron moderator plate made of titanium hydride or graphite.
- the drainage line is preferably passed through the shielding plate.
- the drainage line opening is expediently on the top of the primary cover with a plug lockable.
- the plug contains a neutron moderating material. That way achieved that with closed repository or applied the primary cover neutron radiation the drainage pipe or drainage pipe opening can get through the primary cover.
- the invention is between the primary cover and Container jacket arranged at least one sealing element. It is within the scope of the invention that the sealing element is designed as an elastomer seal.
- the seal on Primary cover prevents gaseous substances from escaping before and during the welding of the secondary cover. In this respect, the primary cover takes on a temporary one Sealing function before and during the secondary cover welding.
- the secondary cover consists of the same material as the container casing, and preferably made of steel, preferably of fine-grain structural steel.
- the secondary lid is placed over the primary lid and preferably gas-tightly welded to the container jacket using a narrow-gap welding process.
- the fuel elements in the repository container according to the invention are enclosed so tightly that further complex sealing measures or monitoring of the tightness are not necessary.
- the secondary lid welded according to the invention forms a tight and permanent barrier both for the intermediate storage and for the final storage of the final storage container.
- the radiation power measured on the outer surface of the secondary cover is always below 100 ⁇ Sv / h.
- a gripping element is preferably connected to the secondary lid in order to facilitate the handling and transportation of the final storage container.
- the entire repository is surrounded by a closed, corrosion-resistant outer layer.
- This corrosion-resistant outer layer can be, for example, a ceramic layer.
- Fuel rods in a tight packing vertically into the interior of the container set are preferred of the container interior after loading with the Fuel rods as low as possible. Due to the dense filling the fuel rods support each other with the fuel rods and to this extent also the mechanical resistance of the repository increased.
- the invention is the repository for receiving the fuel rods of three pressurized water reactor fuel assemblies or to hold the fuel rods of nine boiling water reactor fuel elements designed.
- Another one The embodiment of the invention is the repository container according to the invention for holding the fuel rods of four Pressurized water reactor fuel elements or to accommodate the Fuel rods designed from twelve boiling water reactor fuel elements.
- the invention is based on the knowledge that the inventive Repository with fuel rods for intermediate storage in an intermediate storage container can be adjusted without expensive sealing measures this intermediate storage container required are. It is so far: within the scope of the invention that the Intermediate storage containers only with an intermediate storage container lid must be closed, for example in the intermediate storage container is screwed in. Due to the inventive design of the repository and its high tightness can be complex continuous Leakage checks of the intermediate storage container are not necessary. This also reduces the radiation exposure of the maintenance personnel reduced. It is within the scope of the invention that a plurality of the repository according to the invention in an intermediate storage container are introduced.
- the invention is also based on the knowledge that the repository according to the invention after the intermediate storage easily and in a less complex manner of final storage can be supplied.
- the storage in the Repository takes place after a sufficiently long interim storage period or after the radioactive activity and the Post-decay heat has subsided sufficiently.
- the repository as such can be handled or can be transported without reloading the fuel or the fuel rods is required.
- the secondary cover to weld the repository only when the final storage container is already in an intermediate storage container located.
- the intermediate storage container lid of the intermediate storage container as it were as an auxiliary welding device serve for the welding of the repository.
- the welding is carried out so that the said Intermediate storage container lid turned over its thread is that a loading opening of the intermediate storage container lid is arranged above a repository.
- the repository is raised, so that expediently only the repository head of the repository protrudes from the loading opening.
- Welding of the secondary cover without additional shielding measures possible.
- the loading opening in the intermediate storage container lid can after welding the secondary cover the individual repository with a shielding plug be closed.
- Disposable containers are expediently used, the outer diameter with others intended for final storage Containers matches, for example with the outer diameter of glass molds for glazed highly radioactive Waste from reprocessing.
- - is the outside diameter of the cylindrical repository 350 to 550 mm, preferably 430 to 530 mm.
- the wall thickness the container shell is preferably 30 to 100 mm, preferably 40 to 70 mm.
- the amount of the invention Repository container from the bottom of the container bottom to The top of the secondary cover is expediently 4700 to 5300 mm, preferably 4800 to 5100 mm and very preferred 4900 to 5000 mm.
- the primary cover thickness is preferably (without shielding plate) 150 to 300 mm, preferred 180 to 280 mm. According to a preferred embodiment of the invention does the secondary cover have a thickness (without gripping element) from 30 to 70 mm.
- the thickness of the shield plate is preferably 50 to 100 mm.
- the bottom of the container is facing expediently a thickness of 60 to 120 mm, preferred 80 to 100 mm.
- the invention is distinguished by the considerable advantage from that by including the fuel elements in the invention Repository containers a reliable and permanent tight containment of the radioactive materials remains guaranteed.
- the repository container according to the invention can be used for transport, for interim storage and also used for the final storage of the fuel elements become.
- Drainage line a reliable drainage and Drying of the container interior can be achieved.
- the drainage pipe led to the bottom of the tank can, especially when the fuel rods are packed tightly a surprisingly effective one in the container interior Drainage and drying can be achieved.
- Essential to the invention is that the drainage or drying only with the primary cover applied and only after the drainage or drying of the secondary cover applied and is welded to the container jacket.
- the invention relates to a repository 1 for spent Fuel elements from nuclear power plants.
- the repository 1 consists of container jacket 2, container base 3, a container lid arrangement 4 and the container interior 5 (Figs. 1 and 2).
- the container interior 5 does not take them shown fuel rods in the densest packing.
- the container lid assembly 4 of the repository 1 has a primary lid 7, which primary lid 7 in the container jacket 2 via a corresponding one, not shown Thread is screwed in.
- a primary lid 7 which primary lid 7 in the container jacket 2 via a corresponding one, not shown Thread is screwed in.
- Shielding plate 8 made of a neutron moderating material attached, which shield plate 8 inside the container is oriented (see in particular Fig. 2).
- Between the primary cover 7 and container jacket 2 is preferably not a shown sealing element, preferably in the form of a Metal seal, provided.
- the container lid assembly 4 also has one the primary cover 7 arranged secondary cover 9, the is welded gas-tight to the container jacket 2.
- Fig. 2 the corresponding weld seam 10 has been indicated.
- a drainage line 17 is provided, which extend from the top of the container bottom 3 to extends to the top of the primary cover 7.
- the drainage pipe 17 is according to the preferred embodiment and in Embodiment both through the primary cover 7 as also passed through the shielding plate 8.
- a first drain line opening 19 is provided at the top of the primary cover 7 .
- This drainage pipe opening 19 is closed in the figures with a plug 20.
- the plug 20 preferably contains Neutron moderator material.
- the drainage line 17 furthermore has at least one second drainage line opening 21, preferably with a little distance is arranged above the top of the container bottom 3.
- the distance of the second drainage line opening 21 to Container bottom 3 is, for example, 10 to 20 mm.
- a shield plate opening is in the shield plate 8 22 provided, preferably at the edge of the shielding plate 8 is arranged. So through this shield plate opening 22 incoming neutron radiation is shielded is, according to a preferred embodiment, the above described plug 20 with a neutron moderating Provide material.
- the repository 1 in the water basin or reactor basin of a nuclear power plant loaded with fuel rods 6, which fuel rods 6 preferably in the densest packing vertically set in the container interior of the repository 1 become.
- the primary cover 7 is applied and preferably screwed into the container jacket 2. This is followed by drainage and drying of the container interior 5 via the drainage line 17 instead of.
- a negative pressure in the interior of the container is preferably used for this purpose 5 generated.
- the plug 20 is preferably into the first drainage line opening 19 of the primary cover 7 used. Thereupon the application and The secondary cover 9 is welded.
- the repository 1 also points in the area of the container lid arrangement 4 preferably a handling flange 23 on the safe handling of the repository 1 supported.
- the handling flange 23 also serves for fixing when screwing in the primary cover 7.
- a gripping element 24 is connected to the secondary cover.
- the Gripping element 24 is used for easier handling of the repository 1 and can for example be gripped by a crane become.
- the repository 1 according to the invention with the recorded Fuel rods 6 for intermediate storage in an intermediate storage container 11 set (Fig. 4).
- a repository according to the invention to hold about 2400 kg fuel rods (from three Fuel elements of a pressurized water reactor), for example an outer diameter of 430 mm and an inner diameter from 330 mm.
- the wall thickness of the container jacket is therefore 50 mm.
- the vertical length of the container interior is expediently 4470 mm.
- the primary cover preferably has a thickness (without shielding plate) of 250 mm and a shielding plate made of moderator material has a thickness of 80 mm.
- the secondary cover has expediently a thickness of 50 mm.
- the thickness of the bottom of the container is preferably 90 mm.
- the entire vertical The length of the repository is expediently 4985 mm.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Closures For Containers (AREA)
Description
- Fig. 1
- einen Längsschnitt durch einen erfindungsgemäßen Endlagerbehälter,
- Fig. 2
- den Ausschnitt A aus Fig. 1 in vergrößerter Darstellung,
- Fig. 3
- einen Schnitt B-B durch den Gegenstand nach Fig. 2 in der Draufsicht und
- Fig. 4
- einen Längsschnitt durch einen Zwischenlagerbehälter mit eingesetzten erfindungsgemäßen Endlagerbehältern.
Claims (5)
- Endlagerbehälter (1) für abgebrannte Brennelemente aus Kernkraftwerken, - mitBehältermantel (2), Behälterboden (3), Behälterdeckelanordnung (4) und Behälterinnenraum (5),wobei der Behälterinnenraum (5) zur Aufnahme von Brennstäben (6) der Brennelemente ausgelegt ist,wobei die Behälterdeckelanordnung (4) einen Primärdeckel (7) aufweist, der mit dem Behältermantel (2) arretiert ist,wobei zwischen Primärdeckel (7) und Behältermantel (2) zumindest ein Dichtungselement angeordnet ist, wobei zumindest eine Entwässerungsleitung (17) vorgesehen ist, welche sich von der Oberseite des Behälterbodens (3) bis zur Oberseite des Primärdeckels (7) erstreckt, und wobei die Behälterdeckelanordnung (4) fernerhin einen über dem Primärdeckel (7) angeordneten Sekundärdeckel (9) aufweist, dadurch gekennzeichnet, daß der Primärdeckel (7) in den Behältermantel (2) eingeschraubt ist und der Sekundärdeckel (9) mit dem Behältermantel (2) verschweißt ist.
- Endlagerbehälter nach Anspruch 1, dadurch gekennzeichnet, daß unterhalb des Primärdeckels (7) eine Abschirmplatte (8) angeordnet ist.
- Endlagerbehälter nach Anspruch 2, dadurch gekennzeichnet, daß die Entwässerungsleitung (17) durch die Abschirmplatte (8) geführt ist.
- Endlagerbehälter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß im Bereich der Behälterdeckelanordnung (4) endlagerbehälteraußenseitig ein Hantierungsflansch (23) angeschlossen ist.
- Endlagerbehälter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß an der Oberseite des Sekundärdeckels (9) zumindest ein Greifelement (24) angeschlossen ist.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59801394T DE59801394D1 (de) | 1998-08-01 | 1998-08-01 | Endlagerbehälter für abgebrannte Brennelemente aus Kernkraftwerken |
ES98114501T ES2161005T3 (es) | 1998-08-01 | 1998-08-01 | Recipiente de almacenaje final para elementos combustibles gastados de centrales nucleares. |
EP98114501A EP0978849B1 (de) | 1998-08-01 | 1998-08-01 | Endlagerbehälter für abgebrannte Brennelemente aus Kernkraftwerken |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98114501A EP0978849B1 (de) | 1998-08-01 | 1998-08-01 | Endlagerbehälter für abgebrannte Brennelemente aus Kernkraftwerken |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0978849A1 EP0978849A1 (de) | 2000-02-09 |
EP0978849B1 true EP0978849B1 (de) | 2001-09-05 |
Family
ID=8232392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98114501A Expired - Lifetime EP0978849B1 (de) | 1998-08-01 | 1998-08-01 | Endlagerbehälter für abgebrannte Brennelemente aus Kernkraftwerken |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0978849B1 (de) |
DE (1) | DE59801394D1 (de) |
ES (1) | ES2161005T3 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2647110T3 (es) * | 2013-07-10 | 2017-12-19 | GNS Gesellschaft für Nuklear-Service mbH | Alojamiento de barras de combustible |
EP2975614B1 (de) * | 2014-07-17 | 2017-08-30 | GNS Gesellschaft für Nuklear-Service mbH | Transport- und/oder Lagerbehälter, Montagevorrichtung und Verfahren zum Verschließen eines Transport- und/oder Lagerbehälters |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4197467A (en) * | 1977-12-16 | 1980-04-08 | N L Industries, Inc. | Dry containment of radioactive materials |
DE2950198A1 (de) * | 1979-12-13 | 1981-06-19 | Kraftwerk Union AG, 4330 Mülheim | Einrichtung und verfahren zur lagerung von verbrauchten brennelementen |
GB2257648A (en) * | 1991-07-18 | 1993-01-20 | British Nuclear Fuels Plc | A nuclear fuel container |
DE4135066C1 (de) * | 1991-10-24 | 1993-04-01 | Gns Gesellschaft Fuer Nuklear-Service Mbh, 4300 Essen, De |
-
1998
- 1998-08-01 EP EP98114501A patent/EP0978849B1/de not_active Expired - Lifetime
- 1998-08-01 DE DE59801394T patent/DE59801394D1/de not_active Expired - Lifetime
- 1998-08-01 ES ES98114501T patent/ES2161005T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0978849A1 (de) | 2000-02-09 |
DE59801394D1 (de) | 2001-10-11 |
ES2161005T3 (es) | 2001-11-16 |
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