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Publication numberUS3575601 A
Publication typeGrant
Publication dateApr 20, 1971
Filing dateApr 11, 1969
Priority dateMay 7, 1965
Also published asDE1564969A1, DE1564969B2
Publication numberUS 3575601 A, US 3575601A, US-A-3575601, US3575601 A, US3575601A
InventorsEvans Leslie Samuel, Lindsay Graham Eades
Original AssigneeAtomic Energy Authority Uk
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Transport containers for radioactive materials
US 3575601 A
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Description  (OCR text may contain errors)

United States Patent 1 1 3,575,601

[72] Inventors Graham Eades Lindsay [56] 'ReterencesCited "W Dim; UNITED STATES PATENTS k t' f 'g g 2,935,616 5/1960 Smith,Jr. e161. 250/108 3,046,403 7/1962 Montgomery.... 250/106(S) 2%- 23 3,111,586 11/1963 Rogers 250/103 3,113,215 12/1963 Allen 250/108 g i g May 3,119,933 1/1964 Allen 250/108 [45] Patented 1, 3,310,676 3/1967 Haram,.lr 250/43.5x

9 [73] Assignee United Kingdom Atomic Energy Authority i a y Examiner-Archie R. Borchelt London, England AttorneyLarson, Taylor and Hinds [54] TRANSPORT CONTAINERS FOR RADIOACTIVE MATERIALS 4 Claims, 3 Drawing Figs. [52] U.S. Cl. 250/108, ABSTRACT: A container for the transportation of radioactive 250/106 material, specifically, irradiated fuel elements. The transport [51] Int. Cl G2lf 1/00 container consists of an outer shock resistant steel container [50] Field of Search 250/106, and an interfitted inner container constructed of a plurality of 108 radioactive shielding inserts.

6 &9 I I I I I i 2 I 7 PATENTED APR20197| 335751301 SHEET 2 OF 2 INVENTORS GRAHAM E. LINDSAY LESLIE S. EVANS ATTORNEYS 1. TRANSPORT CONTAINERS FOR RADIOACTIVE MATERIALS This application is a continuation of our previous application, Ser. No. 548,255, filed Mayv 6, 1966, now abandoned.

This invention relates to containers for the carriage of radioactive materials and is particularly but not exclusively concerned with containers for transporting irradiated nuclear fuel elements.

An irradiated fuel element transport container is required to comply with international regulations covering the transportation of radioactive materials. The regulations govern the provision of biological shielding, permitted radiation levels and acceptable internal and external temperatures and require that the container shall withstand a defined maximum transport accident, for example a container must be capable of withstanding a free drop test from 30 feet 'followed additionally by a fire test at 800 C. for 30 minut'es without damage sufficiently severe to cause a release of contents or a significant reduction in shielding.

Known forms of transport container, generally of steel, cast iron and lead construction have been specifically designed for particular fonns of fuel element with the result that a multiplicity of noninterchangeable containers are available. The noninterchangeability of the containers leads to duplication of transport facilities special support and. handling arrangements etc. with resultant increases in cost.

One object of the present invention is to provide a container for the transportation of radioactive materials in which the possibility of accidental release of the contents of the container is minimized and a further object of the invention is to provide a container particularly suitable for the transportation of a variety of radioactive materials.

According to the invention a container forthe transportation of radioactive material hemretically scalable vessel of impact resistant construction, internals for said vessel formed from dense radiation shielding material and means associated with said internals to shieldably locate said radioactive material.

Preferably the vemel has the form of a thick walled high pressure drum and the internals comprise -a plurality of shielding inserts arranged to enclose a central load receiving space. The inserts may be provided with locating pockets for the material being carried or alternatively a separate basket can be used to position the radioactive material relative to the shielding inserts. In one form the vessel is circular in cross section and is provided with dished ends.

The vessel may include a wall extension portion adapted for insertion between the body of the vessel and a removable lid or top portion to accommodate long length loads.

In one form the vessel is provided with external heat transfer fins and a number of said fins extend to the base of the vessel to form vessel support members.

To enable the nature of the invention to be more readily understood embodiments of the invention will now be described by way of example only with reference to the accompanying drawings. In the drawings:

FIG. I is a sectional elevation of a transport container for irradiated nuclear fuel elements;

FIG. 2 is a sectional plan on the line II-Il of FIG. 1; an

FIG. 3 is a sectional elevation of a container similar to that of FIG. I but showing an extension portion.

Referring to FIG. I and FIG. 2 of the drawings a container for irradiated fuel elements comprises a thick steel outer vessel 1 into which can be inserted cast iron shielding members arranged to suit the dimensions of the fuel elements being transported.

The vessel is fabricated from steel plates approximately 5.5 inches thick. The top and bottom are ellipsoidal, the top comprising a full diameter lid 3 removably secured to the body of the container by a plurality of bolts 4 located in recesses 5 formed in the lid. The lid is spigotted to the body and joint rings 6 interposed between the lid and the body ensures leak comprises a ti htness. I

e container, approximately 5 feet in diameter, IS provided cast iron shielding members l0, l1 and 12. Members 10 and 11 form the top and bottom of an inner container and are spigotted to a substantially annularmember 12. Member 12 is apertured to provide locating positions I3 for irradiated nuclear fuel elements. For ease of handling the shielding member 10 may be attached to and removable with the lid.

FIG. 3 shows a modification to the container whereby the fuel elements having a length greater than normal can be accommodated within the container. The container is extended by inserting an annular extension portion 14 between the lid and the container body. Extension portion 14 is provided with mating faces corresponding to the joint surface on the lid and body, and is secured in position by the use of long lid clamping bolts 15. The internal shielding container is also extended by the insertion of a further annular member 16.

It will be appreciated that the shielding blocks 12 and 16 need not be provided with pockets for the location of the fuel' elements. The elements may be positioned in a separate basket (not shown) insertable in a central aperture provided in the said blocks. Such an arrangement provides great flexibility in the dimensions and number of fuel elements that can be accommodated.

The internal shielding need not fill all the internal shielding space ,within'the steel container, for example where shielding conditions permit a thinner section inner container of material or construction to meet a particular requirement can be used and the inner shielding members spaced from the outer wall by suitable struts The struts may be of a light weight material to reduce the total weight of the container in this instance. The struts also act as heat transfer paths between the internal shielding and the outer container.

It will be apparent that the transport container described is particularly advantageous in the ease by which a variety of active materials can be accommodated in a single construction of basic outer container by replacing or rearranging the internal shielding members to provide the desired degree of shielding for the specific load.

We claim:

I. A container for transportation of radioactive material comprising an impact resistent outer vessel constructed from a plurality. of parts, interlitting to define a hermetically sealable chamber, an inner container, the outer surfaces of which conform to the inner surfaces of the outer vessel, said inner container removably located in said chamber, said inner container constructed of a plurality of radioactive shielding inserts interfitting to define a second closable chamber therein, said inserts being interchangeable with similar inserts such that the dimensions of said second chamber may be selectively varied to accommodate different shapes and sizes of said material without necessarily adjusting the dimensions of the outer vessel.

2. A container according to claim 1, wherein the outer vessel comprises a body portion, a removable lid and a wall extension portion adapted for insertion between said body portion and said lid to accommodate long length loads.

3. A container according to claim I, wherein the inserts are provided with locating pockets for the material being carried.

4. A container according to claim 3, wherein the vessel is provided with external heat transfer fins and a number of said fins extend to the base of the outer vessel to form vessel support members.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2935616 *Feb 14, 1955May 3, 1960Farrel Birmingham Co IncRadiation shielding container
US3046403 *Apr 17, 1959Jul 24, 1962Babcock & Wilcox CoDevice for the storage of a heat evolving material
US3111586 *Aug 25, 1961Nov 19, 1963Baldwin Lima Hamilton CorpAir-cooled shipping container for nuclear fuel elements
US3113215 *Feb 27, 1961Dec 3, 1963Stanray CorpCask construction for radioactive material
US3119933 *May 3, 1960Jan 28, 1964Stanray CorpContainer for transporting thermally hot intensely radioactive material
US3310676 *Aug 20, 1963Mar 21, 1967Nuclear Material And EquipmentNeutron irradiating apparatus having a plurality of axial shielded passages for interchanging sources and target materials
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4508969 *Jun 25, 1981Apr 2, 1985Deutsche Gesellschaft Fur WiederaufarbeitungDevice for holding, transporting and final storing of burned-out reactor fuel elements
US4543488 *Oct 9, 1984Sep 24, 1985Transnuklear GmbhTransportation and storage for nuclear fuel wastes
US4803042 *Nov 23, 1987Feb 7, 1989Westinghouse Electric Corp.Nuclear reactor core component shipping container
US4935943 *Aug 30, 1984Jun 19, 1990The United States Of America As Represented By The United States Department Of EnergyCorrosion resistant storage container for radioactive material
US5061858 *Oct 19, 1987Oct 29, 1991Westinghouse Electric Corp.Cask assembly for transporting radioactive material of different intensities
US5442666 *Mar 4, 1994Aug 15, 1995Westinghouse Electric CorporationApparatus for storing control drive rod shafts during chemical decontamination of a reactor
US6580085Feb 2, 1999Jun 17, 2003FramatomeTransport container for nuclear fuel assemblies
US8259892 *Jun 21, 2007Sep 4, 2012Areva NpTransport container for nuclear fuel assemblies and use of said container
DE2915376A1 *Apr 14, 1979Oct 23, 1980Transnuklear GmbhBehaelterkombination zum transport und zur lagerung radioaktiver abfallstoffe, insbesondere bestrahlter kernreaktorbrennelemente
WO1999041754A1 *Feb 2, 1999Aug 19, 1999CogemaTransport container for nuclear fuel assemblies
WO2001063621A1 *Feb 23, 2001Aug 30, 2001Michels LaurentDouble-chamber container for transporting or storing radioactive materials
Classifications
U.S. Classification250/494.1, 976/DIG.345, 976/DIG.343, 250/506.1, 976/DIG.272, 250/428, 376/272
International ClassificationG21F5/008, G21F5/005, G21F5/012
Cooperative ClassificationG21F5/012, G21F5/005
European ClassificationG21F5/005, G21F5/012