US20040140307A1 - Basket for radioactive-waste container - Google Patents
Basket for radioactive-waste container Download PDFInfo
- Publication number
- US20040140307A1 US20040140307A1 US10/405,892 US40589203A US2004140307A1 US 20040140307 A1 US20040140307 A1 US 20040140307A1 US 40589203 A US40589203 A US 40589203A US 2004140307 A1 US2004140307 A1 US 2004140307A1
- Authority
- US
- United States
- Prior art keywords
- layers
- basket
- faces
- radioactive
- layer
- 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.)
- Abandoned
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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
- G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal
- G21F5/008—Containers for fuel elements
- G21F5/012—Fuel element racks in the containers
Definitions
- the present invention relates to a radioactive-waste container. More particularly this invention concerns a basket adapted to hold spent fuel rods or the like in a radioactive-waste container.
- a transport/storage container for spent nuclear-fuel elements has a vessel having a side wall with an inner surface defining an interior extending along an axis and a plurality of like sections forming a basket extending substantially a full axial length of the interior and forming a plurality of axial full-length rectangular-section wells adapted to receive the spent fuel elements.
- Each of the sections is formed of two long light-metal neutron-absorbing plates crossing each other, each having a pair of outer ends directly engaging the inner surface of the side wall in heat-transmitting contact therewith, and subdividing the interior at the respective section into a plurality of segments.
- a plurality of short light-metal neutron absorbing plates are fitted together in each of the segments and form with the main plates of the respective section rectangular-section axially throughgoing openings forming the wells with the plates of the other sections.
- Such a basket fulfills several functions. First of all it physically contains and separates the radioactive elements being stored or transport from one another, to which end it must be fairly strong as these rods are very heavy. Furthermore it must have good neutron-shielding capacity for obvious shielding purposes. Finally the basket must be able to conduct heat readily from the decaying elements to the outer wall of the container.
- the basket is typically made of sheet or plate material having at least two layers.
- One layer is selected for strength and heat transmission and typically is high-strength stainless steel.
- the other layer is typically a boron-alloyed or boron-containing metal whose primary function is maintaining subcriticality, or shielding.
- copper or aluminum it is possible to use also copper or aluminum to maximize heat transmission.
- Another object is the provision of such an improved basket for a radioactive-waste container which overcomes the above-given disadvantages, that is which shields and conducts heat well and that is quite strong.
- a radioactive waste container according to the invention has a waste-holding basket formed of two layers of respective dissimilar materials. The layers have faces engaging each other and are bonded together over their entire engaged faces.
- the surface bond with no spacing according to the invention can be done by roller plating, that is rolling together two sheets of metal under very high pressure with or without an intermediate bonding layer, by high-pressure hydroforming in particular when nonflat shapes are needed, or even by explosive plating.
- roller plating that is rolling together two sheets of metal under very high pressure with or without an intermediate bonding layer
- high-pressure hydroforming in particular when nonflat shapes are needed, or even by explosive plating.
- one of the layers is made of copper, a copper alloy, aluminum, an aluminum alloy, borated stainless steel and/or a boron-containing metal alloy and the other layer is made of high-strength stainless steel.
- the high-strength steel layer acts as the support and supplies most of the strength to the basket while the other layer functions more for shielding. Both layers can conduct heat away and, since they are intimately joined together, will conduct between each other very efficiently.
- a spent radioactive fuel rod shown partly at 3 is held in a container shown partly at 4 in a similarly partially shown basket comprised of a pair of layers 1 and 2 .
- the layers 1 and 2 have confronting faces 1 ′ and 2 ′ that are secured molecularly together at a bond 5 that extends over the entire areas of these faces 1 ′ and 2 ′.
- This bond 5 is produced here by roller plating, that is pressing two sheets or plates together between rollers with such force that they bond together.
- the layer or lamina 1 is made of copper, a copper alloy, aluminum, an aluminum alloy, borated stainless steel and/or a boron-containing metal alloy.
- the other layer or lamina 2 is made of high-strength stainless steel. The two layers 1 and 2 are unitarily joined together at the faces 1 ′ and 2 ′ in surface contact, that is bonded on a molecular level.
- the bond 5 can also be a sheet bonding layer between the faces 1 ′ and 2 ′ unitarily bonding same together.
Abstract
A radioactive waste container according to the invention has a waste-holding basket formed of two layers of respective dissimilar materials. The layers have faces engaging each other and are bonded together over their entire engaged faces.
Description
- The present invention relates to a radioactive-waste container. More particularly this invention concerns a basket adapted to hold spent fuel rods or the like in a radioactive-waste container.
- As described in U.S. Pat. No. 6,256,363 a transport/storage container for spent nuclear-fuel elements has a vessel having a side wall with an inner surface defining an interior extending along an axis and a plurality of like sections forming a basket extending substantially a full axial length of the interior and forming a plurality of axial full-length rectangular-section wells adapted to receive the spent fuel elements. Each of the sections is formed of two long light-metal neutron-absorbing plates crossing each other, each having a pair of outer ends directly engaging the inner surface of the side wall in heat-transmitting contact therewith, and subdividing the interior at the respective section into a plurality of segments. A plurality of short light-metal neutron absorbing plates are fitted together in each of the segments and form with the main plates of the respective section rectangular-section axially throughgoing openings forming the wells with the plates of the other sections.
- Such a basket fulfills several functions. First of all it physically contains and separates the radioactive elements being stored or transport from one another, to which end it must be fairly strong as these rods are very heavy. Furthermore it must have good neutron-shielding capacity for obvious shielding purposes. Finally the basket must be able to conduct heat readily from the decaying elements to the outer wall of the container.
- As a result the basket is typically made of sheet or plate material having at least two layers. One layer is selected for strength and heat transmission and typically is high-strength stainless steel. The other layer is typically a boron-alloyed or boron-containing metal whose primary function is maintaining subcriticality, or shielding. In addition it is possible to use also copper or aluminum to maximize heat transmission.
- These layers are very difficult to join together. Typically welds are used, which means that there are gaps or spaces between the layers. As a result, heat transmission is reduces because of the spaces. Furthermore these spaces can trap water and create subsequent corrosion problems. Finally the welding invariably weakens at least the boron-containing layer, reducing the overall strength of the basket. The only way to make such a multilayer basket strong enough is to use fairly thick plate material, increasing the weight of the basket and reducing the space available for the radioactive material being stored.
- Another disadvantage of the known systems is that they are fairly expensive to manufacture. The techniques for welding together such disparate materials are somewhat complex, and at best yield poor results.
- It is therefore an object of the present invention to provide an improved basket for a radioactive-waste container.
- Another object is the provision of such an improved basket for a radioactive-waste container which overcomes the above-given disadvantages, that is which shields and conducts heat well and that is quite strong.
- A radioactive waste container according to the invention has a waste-holding basket formed of two layers of respective dissimilar materials. The layers have faces engaging each other and are bonded together over their entire engaged faces.
- Joining the two layers of the basket over their entire surfaces ensures that there are no air gaps between them, greatly increasing the strength of the assembly even though it might include a relatively weak boron-containing metal. Furthermore the elimination of any air spaces between the layers ensures that heat will be efficiently transmitted by them to the surrounding container. The layer of radiation-blocking material is also continuous and of uniform thickness so it offers maximum shielding with no leak spots.
- The surface bond with no spacing according to the invention can be done by roller plating, that is rolling together two sheets of metal under very high pressure with or without an intermediate bonding layer, by high-pressure hydroforming in particular when nonflat shapes are needed, or even by explosive plating. What is important in accordance with the invention is that the confronting surfaces of the two layers are joined together at the molecular level over their entire abutting surfaces, with or without the interposition of an intermediate bonding layer with which both layers are molecularly bonded.
- In accordance with the invention one of the layers is made of copper, a copper alloy, aluminum, an aluminum alloy, borated stainless steel and/or a boron-containing metal alloy and the other layer is made of high-strength stainless steel. The high-strength steel layer acts as the support and supplies most of the strength to the basket while the other layer functions more for shielding. Both layers can conduct heat away and, since they are intimately joined together, will conduct between each other very efficiently.
- The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing whose sole figure is a largely diagrammatic representation of the invention.
- As seen in the drawing a spent radioactive fuel rod shown partly at3 is held in a container shown partly at 4 in a similarly partially shown basket comprised of a pair of
layers layers faces 1′ and 2′ that are secured molecularly together at abond 5 that extends over the entire areas of thesefaces 1′ and 2′. Thisbond 5 is produced here by roller plating, that is pressing two sheets or plates together between rollers with such force that they bond together. - In accordance with the invention the layer or
lamina 1 is made of copper, a copper alloy, aluminum, an aluminum alloy, borated stainless steel and/or a boron-containing metal alloy. The other layer orlamina 2 is made of high-strength stainless steel. The twolayers faces 1′ and 2′ in surface contact, that is bonded on a molecular level. - The
bond 5 can also be a sheet bonding layer between thefaces 1′ and 2′ unitarily bonding same together.
Claims (4)
1. In a radioactive waste container, a waste-holding basket formed of two layers of respective dissimilar materials, the layers having faces engaging each other and being bonded together over their entire engaged faces.
2. The basket defined in claim 1 wherein one of the layers is made of copper, a copper alloy, aluminum, an aluminum alloy, borated stainless steel or a boron-containing metal alloy and the other layer is made of high-strength stainless steel.
3. The basket defined in claim 1 wherein the layers are joined unitarily in surface contact.
4. The basket defined in claim 1 , further comprising
a layer of bonding material between the faces unitarily bonding the layers together.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03001434A EP1443524A1 (en) | 2003-01-22 | 2003-01-22 | Transport and/or storage container for radioactive materials, especially spent nuclear fuel bundles |
EP03001434.4 | 2003-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040140307A1 true US20040140307A1 (en) | 2004-07-22 |
Family
ID=32605237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/405,892 Abandoned US20040140307A1 (en) | 2003-01-22 | 2003-04-02 | Basket for radioactive-waste container |
Country Status (2)
Country | Link |
---|---|
US (1) | US20040140307A1 (en) |
EP (1) | EP1443524A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090175404A1 (en) * | 2007-10-29 | 2009-07-09 | Singh Krishna P | Apparatus for supporting radioactive fuel assemblies and methods of manufacturing the same |
JP2015004576A (en) * | 2013-06-20 | 2015-01-08 | 三菱重工業株式会社 | Radioactive substance storage basket and radioactive substance storage container |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4663533A (en) * | 1983-12-27 | 1987-05-05 | Battelle Memorial Institute | Storage and shipping cask for spent nuclear fuel |
US4666659A (en) * | 1983-10-25 | 1987-05-19 | Mitsubishi Heavy Industries, Ltd. | Shipping and storage container for spent nuclear fuel |
US4780268A (en) * | 1984-06-13 | 1988-10-25 | Westinghouse Electric Corp. | Neutron absorber articles |
US4827139A (en) * | 1987-04-20 | 1989-05-02 | Nuclear Assurance Corporation | Spent nuclear fuel shipping basket and cask |
US5612543A (en) * | 1996-01-18 | 1997-03-18 | Sierra Nuclear Corporation | Sealed basket for boiling water reactor fuel assemblies |
US6256363B1 (en) * | 1999-04-17 | 2001-07-03 | Gnb Gesellschaft Fur Nuklear-Behalter Mbh | Storage/transport container for spent nuclear-fuel elements |
US20020163989A1 (en) * | 2000-09-01 | 2002-11-07 | Maurice Dallongeville | Storage container for radioactive materials |
US6741669B2 (en) * | 2001-10-25 | 2004-05-25 | Kenneth O. Lindquist | Neutron absorber systems and method for absorbing neutrons |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7833030U1 (en) * | 1978-11-07 | 1979-03-08 | Transnuklear Gmbh, 6450 Hanau | INSERT BASKET FOR BURN-DOWN FUEL ELEMENTS IN TRANSPORT AND / OR STORAGE CONTAINERS |
DE3447278A1 (en) * | 1984-12-22 | 1986-06-26 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe | LONG-TERM CORROSION PROTECTION COVER FOR TIGHTLY CLOSED CONTAINERS WITH HIGH RADIOACTIVE CONTENT |
JPS61162799A (en) * | 1985-01-11 | 1986-07-23 | 株式会社神戸製鋼所 | Basket for spent fuel transport vessel |
JPS6212899A (en) * | 1985-07-10 | 1987-01-21 | 株式会社神戸製鋼所 | Basket for spent fuel transport and storage vessel |
JPH11264893A (en) * | 1998-01-14 | 1999-09-28 | Nuclear Fuel Ind Ltd | Storage vessel of spent fuel |
JP3122436B1 (en) * | 1999-09-09 | 2001-01-09 | 三菱重工業株式会社 | Aluminum composite material, method for producing the same, and basket and cask using the same |
JP3207840B1 (en) * | 2000-07-06 | 2001-09-10 | 三菱重工業株式会社 | Aluminum alloy material and method for producing the same, basket and cask using the same |
-
2003
- 2003-01-22 EP EP03001434A patent/EP1443524A1/en not_active Withdrawn
- 2003-04-02 US US10/405,892 patent/US20040140307A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4666659A (en) * | 1983-10-25 | 1987-05-19 | Mitsubishi Heavy Industries, Ltd. | Shipping and storage container for spent nuclear fuel |
US4663533A (en) * | 1983-12-27 | 1987-05-05 | Battelle Memorial Institute | Storage and shipping cask for spent nuclear fuel |
US4780268A (en) * | 1984-06-13 | 1988-10-25 | Westinghouse Electric Corp. | Neutron absorber articles |
US4827139A (en) * | 1987-04-20 | 1989-05-02 | Nuclear Assurance Corporation | Spent nuclear fuel shipping basket and cask |
US5612543A (en) * | 1996-01-18 | 1997-03-18 | Sierra Nuclear Corporation | Sealed basket for boiling water reactor fuel assemblies |
US6256363B1 (en) * | 1999-04-17 | 2001-07-03 | Gnb Gesellschaft Fur Nuklear-Behalter Mbh | Storage/transport container for spent nuclear-fuel elements |
US20020163989A1 (en) * | 2000-09-01 | 2002-11-07 | Maurice Dallongeville | Storage container for radioactive materials |
US6741669B2 (en) * | 2001-10-25 | 2004-05-25 | Kenneth O. Lindquist | Neutron absorber systems and method for absorbing neutrons |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090175404A1 (en) * | 2007-10-29 | 2009-07-09 | Singh Krishna P | Apparatus for supporting radioactive fuel assemblies and methods of manufacturing the same |
US8576976B2 (en) | 2007-10-29 | 2013-11-05 | Holtec International, Inc. | Apparatus for supporting radioactive fuel assemblies and methods of manufacturing the same |
US9728284B2 (en) | 2007-10-29 | 2017-08-08 | Holtec International, Inc. | Apparatus for supporting radioactive fuel assemblies and methods of manufacturing the same |
JP2015004576A (en) * | 2013-06-20 | 2015-01-08 | 三菱重工業株式会社 | Radioactive substance storage basket and radioactive substance storage container |
Also Published As
Publication number | Publication date |
---|---|
EP1443524A1 (en) | 2004-08-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GNB GESELLSCHAFT FUR NUKLEAR-BEHALTER MBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CANZLER, HANS-JURGEN;HUGGENBERG, ROLAND;REEL/FRAME:014131/0689;SIGNING DATES FROM 20030519 TO 20030523 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |