US3466662A - Fireproof shielded containers for radioactive materials - Google Patents
Fireproof shielded containers for radioactive materials Download PDFInfo
- Publication number
- US3466662A US3466662A US494697A US49469765A US3466662A US 3466662 A US3466662 A US 3466662A US 494697 A US494697 A US 494697A US 49469765 A US49469765 A US 49469765A US 3466662 A US3466662 A US 3466662A
- Authority
- US
- United States
- Prior art keywords
- screen
- lead
- container
- radioactive materials
- calcium sulphate
- 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
- 239000012857 radioactive material Substances 0.000 title description 13
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 30
- 235000011132 calcium sulphate Nutrition 0.000 description 15
- 239000001175 calcium sulphate Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000011505 plaster Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
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
Definitions
- a container for radio-active materials of the kind comprising an inner casing, a lead screen closely surrounding this casing and an outer shell, as for instance of steel, there is left between the lead screen and the outer shell an intermediate space which is lled with plaster (hydrated calcium sulphate) to form a refractory protective heat-insulating and water containing layer.
- the cover of the container may also comprise a layer of plaster between its lead screen and its outer plate.
- This invention refers to containers for radioactive materials.
- Radioactive materials are generally stored and transported within containers so arranged as to protect against dangerous radiations.
- the casing in which the material is disposed is generally surrounded by a thick lead screen which is itself re-inforced by an outer metallic shell.
- the devices or casks thus realized may be damaged by violet shocks or by tire and therefore they are generally placed within another protective casing made of wood or like relatively deformable material and having an outer metallic covering.
- the present invention has for its object to provide a container for radio-active materials which will not suffer from the above inconveniences.
- a container for radioactive materials comprises an inner casing, a thick lead screen surrounding the said casing in direct contact therewith, an outer shell surrounding the lead screen, but of such dimensions as to leave an intermediate space, and a mass of plaster, i.e., hydrated calcium sulphate (SO4Ca, 11H20) poured into the said intermediate space to lill the same.
- plaster i.e., hydrated calcium sulphate (SO4Ca, 11H20)
- the mechanical and the thermal characteristics of the mass which tills the intermediate space may be varied at will by incorporating to the calcium sulphate appropriate llers.
- the llers are preferably of heat-insulating character. With containers of large dimensions in which the radioactive material may generate an important quantity of heat, it may on the contrary be desirable to use heat-conducting llers.
- the mass of hydrated calcium sulphate contains a considerable quantity of water. In the case of a re this water is liberated in the form of steam. In order to avoid bursting of the outer shell the latter is preferably provided with vents which are normally closed by readily frangible covers or by easily fusible plugs. This generation of steam absorbs a considerable quantity of heat, but even when the whole mass is fully dehydrated, it still forms an excellent heat insulating layer.
- FIG. 1 is a fragmental vertical section of a container according to the present invention.
- FIGS. 2 and 3 are small scale views which diagrammatically illustrate two steps during the manufacture of the container.
- the container illustrated in FIG. l comprises an inner casing 1 of conventional type, adapted to house the radioactive material to be transported.
- the upper end of this inner casing is closed by a removable cover 2, seals 3 being disposed below the underface of the cover and a flanged portion of the wall of the casing.
- a thick lead screen 4 surrounds the inner casing 1 in direct contact with the outer surface thereof.
- the cover 2 is provided with an upturned lateral edge and it has also a thick lead layer or screen S on its upper face.
- the upturned upper edge of the inner casing 1 is counected with an upper horizontal flange 6 by an upwardly flaring frusto-conical intermediate annular portion 7, preferably made of stainless steel, which may be welded to the said edge and to the flange.
- This intermediate portion is wide enough to provide a substantial space between the outer surface of the lead screen 4 and the flange 6.
- the flange 6 is itself welded to an outer metallic shell 8 of such dimensions as to leave an intermediate space between its inner surface and the outer surface of the lead screen 4.
- the outer edge of the cover 2 is similarly connected with an outer horizontal flange 9 by an intermediate frusto-conical portion 10 made of stainless steel, the said ange 9 being welded with an upper plate 11 spaced from the upper surface of the lead layer or screen S.
- the intermediate space comprised -between the lead screen 4 and the outer shell 8 is lled with a mass 13 of hydrated calcium sulphate I(plaster) which has -been obtained by pouring this substance into the said space in the liquid or semi-liquid state.
- the space between the lead layer 5 and the upper plate 11 is similarlyjilled with another mass 13 of hydrated calcium sulphate.
- the ilanges 6 and 9 are provided with appropriate passages or vents which are normally obturated by fusible plugs such as 14 and 15.
- the outer shell 8 may further comprise easily fragnible portions or fusible discs, such as 16.
- FIGS. 2 and 3 illustrate the manufacturing step of a container according to the present invention.
- the inner casing 1 made for instance of stainless sheet-iron, is disposed in the inverted position on an appropriate supporting surface, not illustrated.
- a tubular open-ended mould 17 is then placed on the casing with its intumed lower edge resting on the intermediate frustoconical portion 7 of the casing.
- Molten lead is poured linto the inner space A of the mould to form the lead screen around the casing.
- the mold is removed and the screen thus obtained is machined to the exact configuration desired.
- the outer shell 8 has been prepared separately with apertures such as 8a in its bottom. It is disposed at the inverted position on the unit formed by the inner casing and the lead screen, and the horizontal flange 6 is welded to the intermediate portion 7 and to the edge of the open end of the outer shell 8. Alternatively this flange could have been previously welded to the intermediate portion 7 before casting the lead screen, if desired. In any case this horizontal flange 6 acts as a centering means for the outer shell 8 with respect to the inner casing 1.
- the apertures 8a are closed by means of fusible discs such as 16 (FIG. l).
- the cover of the container is prepared in the same manner, but here the upturned lateral edge of the cover forms the mould into which the molten lead is poured to form the layer or screen 5.
- the upper plate 11 is formed with apertures, not shown, through which the mass of calcium sulphate may be poured after the plate is welded to the outer fiange 9. As in the case of the apertures 8a of the outer shell 8, these apertures of the upperplate are thereafter closed by fusible discs.
- an open-ended container for radioactive materials comprising an inner casing, a protective lead screen surrounding said inner casing in direct contact therewith,
- a container as claimed in claim 1 further having a cover to close its upper end with said cover having an inner plate with an inner side and an outer side, a protective lead layer in contact with the outer side of said plate, an outer plate to cover said lead layer, and flange means to connect said inner plate with said outer plate, the improvement in which said outer plate is spaced from said screen layer to define therewith an intermediate space, said cover further comprising a solid non-shielding mass of hydrated calcium sulphate filling said intermediate space between said inner and outer plates to form a heat-absorbing barrier protecting said lead layer against fires.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Packages (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR45242A FR1438241A (fr) | 1964-10-21 | 1964-10-21 | Perfectionnements aux caissons ou châteaux pour le transport des matières radioactives et analogues |
Publications (1)
Publication Number | Publication Date |
---|---|
US3466662A true US3466662A (en) | 1969-09-09 |
Family
ID=9694458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US494697A Expired - Lifetime US3466662A (en) | 1964-10-21 | 1965-10-11 | Fireproof shielded containers for radioactive materials |
Country Status (6)
Country | Link |
---|---|
US (1) | US3466662A (de) |
BE (1) | BE670734A (de) |
DE (1) | DE1514616A1 (de) |
FR (1) | FR1438241A (de) |
GB (1) | GB1046848A (de) |
NL (1) | NL6514374A (de) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3723742A (en) * | 1968-04-11 | 1973-03-27 | Trw Inc | Radioisotope capsule protection structure |
US3780306A (en) * | 1971-05-27 | 1973-12-18 | Nat Lead Co | Radioactive shipping container with neutron and gamma absorbers |
US3886368A (en) * | 1973-02-27 | 1975-05-27 | Nuclear Fuel Services | Spent fuel shipping cask |
US3930166A (en) * | 1972-11-28 | 1975-12-30 | Robatel Slpi | Package for transporting or enclosing radioactive materials |
US3982134A (en) * | 1974-03-01 | 1976-09-21 | Housholder William R | Shipping container for nuclear fuels |
US4747512A (en) * | 1987-06-19 | 1988-05-31 | Lo Kin K | Transportation packaging for liquids |
US5337917A (en) * | 1991-10-21 | 1994-08-16 | Sandia Corporation | Crash resistant container |
WO2006043826A1 (en) * | 2004-10-19 | 2006-04-27 | Nuclear Protection Products As | Container for long-term storage of radioactive material, and method and apparatus for manufacturing the container |
WO2010104398A1 (en) * | 2009-03-11 | 2010-09-16 | Nuclear Protection Products As | A method and a moulding plant for manufacturing a storage container for storage of nuclear radiation material |
US20100284778A1 (en) * | 2007-12-26 | 2010-11-11 | Areva Np | Transport Container for Nuclear Fuel Assembly and Method of Transporting a Nuclear Fuel Assembly |
US8616404B1 (en) * | 2010-06-03 | 2013-12-31 | Savannah River Nuclear Solutions, Llc | Shipping container |
EP2827336A1 (de) * | 2013-07-15 | 2015-01-21 | GNS Gesellschaft für Nuklear-Service mbH | Transport- und/oder Lagerbehälter |
US11342091B2 (en) * | 2004-03-18 | 2022-05-24 | Holtec International | Systems and methods for storing spent nuclear fuel |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2055761A1 (de) * | 1969-08-12 | 1971-04-30 | Robatel Slpi | |
FR2055982A5 (en) * | 1969-08-13 | 1971-05-14 | Transnucleaire | Storage and transport container for a - radioactive materials |
JPS5985999A (ja) * | 1982-11-08 | 1984-05-18 | 秩父セメント株式会社 | 多重型容器およびその製造方法 |
DE8809283U1 (de) * | 1988-07-20 | 1988-09-22 | Nukem GmbH, 63755 Alzenau | Transport- und/oder Lagerbehälter für radioaktive Stoffe |
DE102016108947A1 (de) * | 2016-05-13 | 2017-11-16 | Daher Nuclear Technologies Gmbh | Anordnung zum Transport von radioaktivem Material sowie Verfahren zur Erhöhung des Brandschutzes einer solchen Anordnung |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3005105A (en) * | 1958-10-17 | 1961-10-17 | Edlow Lead Company | Shipping cask for radioactive materials |
US3111586A (en) * | 1961-08-25 | 1963-11-19 | Baldwin Lima Hamilton Corp | Air-cooled shipping container for nuclear fuel elements |
US3113215A (en) * | 1961-02-27 | 1963-12-03 | Stanray Corp | Cask construction for radioactive material |
US3173884A (en) * | 1962-07-13 | 1965-03-16 | David A Jackson | Concrete comprising galena ore aggregate, calcium aluminum hydraulic binder and standard aggregates |
-
1964
- 1964-10-21 FR FR45242A patent/FR1438241A/fr not_active Expired
-
1965
- 1965-10-08 BE BE670734A patent/BE670734A/xx unknown
- 1965-10-11 US US494697A patent/US3466662A/en not_active Expired - Lifetime
- 1965-10-11 GB GB43025/65A patent/GB1046848A/en not_active Expired
- 1965-11-05 NL NL6514374A patent/NL6514374A/xx unknown
- 1965-11-10 DE DE1965S0100440 patent/DE1514616A1/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3005105A (en) * | 1958-10-17 | 1961-10-17 | Edlow Lead Company | Shipping cask for radioactive materials |
US3113215A (en) * | 1961-02-27 | 1963-12-03 | Stanray Corp | Cask construction for radioactive material |
US3111586A (en) * | 1961-08-25 | 1963-11-19 | Baldwin Lima Hamilton Corp | Air-cooled shipping container for nuclear fuel elements |
US3173884A (en) * | 1962-07-13 | 1965-03-16 | David A Jackson | Concrete comprising galena ore aggregate, calcium aluminum hydraulic binder and standard aggregates |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3723742A (en) * | 1968-04-11 | 1973-03-27 | Trw Inc | Radioisotope capsule protection structure |
US3780306A (en) * | 1971-05-27 | 1973-12-18 | Nat Lead Co | Radioactive shipping container with neutron and gamma absorbers |
US3930166A (en) * | 1972-11-28 | 1975-12-30 | Robatel Slpi | Package for transporting or enclosing radioactive materials |
US3886368A (en) * | 1973-02-27 | 1975-05-27 | Nuclear Fuel Services | Spent fuel shipping cask |
US3982134A (en) * | 1974-03-01 | 1976-09-21 | Housholder William R | Shipping container for nuclear fuels |
US4747512A (en) * | 1987-06-19 | 1988-05-31 | Lo Kin K | Transportation packaging for liquids |
US5337917A (en) * | 1991-10-21 | 1994-08-16 | Sandia Corporation | Crash resistant container |
US11342091B2 (en) * | 2004-03-18 | 2022-05-24 | Holtec International | Systems and methods for storing spent nuclear fuel |
US7741628B2 (en) | 2004-10-19 | 2010-06-22 | Nuclear Protection Products As | Container for long-term storage of radioactive material, and method and apparatus for manufacturing the container |
US20080277602A1 (en) * | 2004-10-19 | 2008-11-13 | Frank Stengrimsen | Container for Long-Term Storage of Radioactive Material, and Method and Apparatus for Manufacturing the Container |
US20080179550A1 (en) * | 2004-10-19 | 2008-07-31 | Nuclear Protection Products As | Long term storage container and manufacturing method |
NO338856B1 (no) * | 2004-10-19 | 2016-10-24 | Mezonic As | Fremgangsmåte for fremstilling av beholder for langvarig lagring av radioaktivt materiale, lagringsbeholder og støpeanordning for fremstilling av beholderdeler |
WO2006043826A1 (en) * | 2004-10-19 | 2006-04-27 | Nuclear Protection Products As | Container for long-term storage of radioactive material, and method and apparatus for manufacturing the container |
US20100284778A1 (en) * | 2007-12-26 | 2010-11-11 | Areva Np | Transport Container for Nuclear Fuel Assembly and Method of Transporting a Nuclear Fuel Assembly |
US9275768B2 (en) * | 2007-12-26 | 2016-03-01 | Areva Np | Transport container for nuclear fuel assembly and method of transporting a nuclear fuel assembly |
WO2010104398A1 (en) * | 2009-03-11 | 2010-09-16 | Nuclear Protection Products As | A method and a moulding plant for manufacturing a storage container for storage of nuclear radiation material |
US20100230854A1 (en) * | 2009-03-11 | 2010-09-16 | Frank Stengrimsen | Method and a plant for manufacturing a storage container for storage of nuclear radiation material |
US7981344B2 (en) | 2009-03-11 | 2011-07-19 | Nuclear Protection Products As | Method for manufacturing a storage container for storage of nuclear radiation material |
US8226403B2 (en) | 2009-03-11 | 2012-07-24 | Nuclear Protection Products As | Moulding apparatus for manufacturing a storage container for storage of nuclear radiation material |
US8616404B1 (en) * | 2010-06-03 | 2013-12-31 | Savannah River Nuclear Solutions, Llc | Shipping container |
EP2827336A1 (de) * | 2013-07-15 | 2015-01-21 | GNS Gesellschaft für Nuklear-Service mbH | Transport- und/oder Lagerbehälter |
Also Published As
Publication number | Publication date |
---|---|
NL6514374A (de) | 1967-05-08 |
GB1046848A (en) | 1966-10-26 |
DE1514616A1 (de) | 1969-10-02 |
FR1438241A (fr) | 1966-05-13 |
BE670734A (de) | 1966-01-31 |
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