US3808446A - Cooling fins of radiation shielding material on containers for transporting radioactive material - Google Patents

Cooling fins of radiation shielding material on containers for transporting radioactive material Download PDF

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Publication number
US3808446A
US3808446A US00830610A US83061069A US3808446A US 3808446 A US3808446 A US 3808446A US 00830610 A US00830610 A US 00830610A US 83061069 A US83061069 A US 83061069A US 3808446 A US3808446 A US 3808446A
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US
United States
Prior art keywords
fins
radiation
container
radioactive material
shielding material
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
Application number
US00830610A
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English (en)
Inventor
E Sidebotham
A Jackson
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UK Atomic Energy Authority
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UK Atomic Energy Authority
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Application granted granted Critical
Publication of US3808446A publication Critical patent/US3808446A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G21F5/10—Heat-removal systems, e.g. using circulating fluid or cooling fins

Definitions

  • a container for transporting decay-heat-producing radioactive material has a body which incorporates shielding material, and on said body external fins which also incorporate shielding material, the fins being inclined in at least one direction to the normal from the external surface of the container body so as to present to radiation emitted from said radioactive material on elongated attenuation path, thereby enabling the body of the containerto be reduced in thickness and therefore in weight, for an equivalent shielding duty.
  • This invention relates to containers for transporting radioactive material.
  • Containers for transporting irradiated fuel have in the past had to be designed to compromise between the necessity to keep radiation below the limit allowed by transport regulations and the necessity to keep the weight of the container as low as is, reasonable from both the tariff and the cost of production points of view.
  • Such design has been further complicated by the additional necessity of having to provide fins on the outsides of the containers in order that decay heat can be dissipated.
  • the heat-dissipating fins have been straight circumferential and disposed perpendicularly to the container body.
  • the material employed for the fins has contributed only locally towards the shielding function of the containers themselves.
  • a container for transporting decay-heat-producing radioactive material having a body incorporating shielding material and on said body external fins for dissipation of such decay heat, is characterised in that the fins incorporate shielding material and are inclined in at least one direction to the normal from the external surface of the body of said container in such a manner that radiation emitted from the radioactive material is presented with 'a total attenuation path sufficient to attenuate such radiation by a required amount, whereas emitted radiation passing normally through the body of said container in the absence of said fins would be attenuated less than said required amount.
  • Reference to a required amount in relation to attenuation of radiation is to be understood to relate to a limit on the amount of radiation emitted from a transport container as set by international, national or local regulations, codes of practice or recommendations governing the transport of radioactive material.
  • the fins are inclined in two directions to said normal and are sufficiently closely spaced so that emitted radiation in addition to having to pass through the body of the container has additionally to pass through at least two thicknesses of the fin material.
  • the fins are circumferential and each fin in cross-section has two integral limbs at right angles to one another, one limb of each fin being secured along its free edge to the external surface of the container body so as to be at substantially 45 thereto,
  • the body 1 of the container has semi-circular fins 2 circumferentially welded thereto at 3, thefins 2 being formed from angle iron (for example: 4 X 4 X 4 inch, or 4 X 6 X /8 inch the longer limb in the latter example being the non-welded limb, which improves overlap where close pitching is employed) and secured to the container body 1 with the limbs thereof at to the normal from the body 1.
  • Each two semi-circular fin portions are butt-welded at their ends to form a complete circumferential fin 2.
  • the drawing also shows non-radiused fins (the three on the left hand side) and one fin (the one on the extreme left hand side) with a longer free limb than the remainder, as examples of alternatives which can be employed exclusively or in combination.
  • the gap between the fins 2 is not significantly more than twice the limb thickness, so that any radiation passing through the container body 1 and not having.
  • a container according to the invention is advantageous in that the wall thickness of the container body, compared with that of the known construction herein before referred to, can be reduced, for the same shielding requirement (for example by 2.8 X limb thickness), which leads to a saving in both weight and cost. Furthermore, improvement in its performance in drop tests is to be expected.
  • the invention envisages shapes and fabrications of fins other than according to the describedexample, together with the employment of the described or other fins on plane-sided or other-than-cylindrical containers.
  • a container comprising a body which incorporates radiation shielding material and external cooling fins on said body, said fins incorporating radiation shielding material and being inclined in at least one direction to the normal from the external surface of said and the spacing between fins being substantially twice 7 the limb thickness.
  • This preferred form has the fins secured to the container body by welding, the fins being formed in semi-circles and produced by hot-rolling angle iron in amanner such that the limbs are at substantially 45 to'the plane of the semi-circle.
  • FIGURE of the accompanying drawing is a fragmentary side view inmedial section and illustrates a short length of a complete hollow cylindrical transport container for irradiated nuclear reactor fuel elements.
  • said fins being positioned relative to each other and the degree of inclination being such that radiation emitted from the radioactive material in the direction normal to the external surface of said body is presented with a total attenuation path which includes said body and at least one of said fins, whilst radiation in a direction oblique to the external surface of said body is presented with at least an extended attenuation path afforded by oblique passage through the body, and which attenuates such radiation by a required amount
  • a container comprising a body which incorporates radiation shielding material, andexternal fins on said body, said fins incorporating radiation shielding material, being inclined in two directions to the normal from the external surface of said body, and said fins being sufficiently'closely spaced so that any radiation emitted from the radioactive material in addition to having to pass through the body of the container. has additionally to pass through at least two thicknesses of the fin material, whereas emitted radiation passing normally through the body of said container in the absence of said fins would be attenuated less than said required 1 I amount.
  • the spacing between fins being substantially twice the limb thickness so that any radiation emitted from the *gfradioactive material is presented with a total attenuation path which includes said and at least one of said fins and which attenuates such radiation by a required amount, whereas emitted radiation passing normally through the body of said container in the absence of said fins would be attenuated less than said required amount.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Particle Accelerators (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packages (AREA)
US00830610A 1968-07-08 1969-06-05 Cooling fins of radiation shielding material on containers for transporting radioactive material Expired - Lifetime US3808446A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3257668 1968-07-08

Publications (1)

Publication Number Publication Date
US3808446A true US3808446A (en) 1974-04-30

Family

ID=10340796

Family Applications (1)

Application Number Title Priority Date Filing Date
US00830610A Expired - Lifetime US3808446A (en) 1968-07-08 1969-06-05 Cooling fins of radiation shielding material on containers for transporting radioactive material

Country Status (5)

Country Link
US (1) US3808446A (fr)
BE (1) BE735687A (fr)
DE (1) DE1934048B2 (fr)
FR (1) FR2012489A1 (fr)
GB (1) GB1266684A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2872956A1 (fr) * 2004-07-12 2006-01-13 Cogema Logistics Sa Dispositif externe d'evacuation de chaleur pour emballage destine au stockage et/ou au transport de matieres nucleaires
US20140219411A1 (en) * 2013-02-06 2014-08-07 Westinghouse Electric Company Llc Alternate passive spent fuel pool cooling systems and methods

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008992C2 (de) * 1980-03-08 1984-02-02 Transnuklear Gmbh, 6450 Hanau Behälter für den Transport- und/oder die Lagerung radioaktiver Stoffe
DE10338845B3 (de) * 2003-08-20 2005-06-09 Steag Encotec Gmbh Behälter für abgebrannte Brennelemente
FR3045143B1 (fr) * 2015-12-14 2017-12-22 Tn Int Structure amelioree de dissipation de chaleur par convection naturelle, pour emballage de transport et/ou d'entreposage de matieres radioactives

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3008050A (en) * 1957-08-01 1961-11-07 Jersey Prod Res Co Apparatus for logging well bores
US3113089A (en) * 1954-11-24 1963-12-03 Martin Marietta Corp Shield for intercepting radiant energy from an atomic reactor
US3121794A (en) * 1959-10-12 1964-02-18 Kalman M Held Scattering radiation shield
US3132998A (en) * 1958-09-01 1964-05-12 Atomic Energy Authority Uk Nuclear reactors
US3239424A (en) * 1962-03-20 1966-03-08 Atomic Energy Authority Uk Neutron shielding
US3483381A (en) * 1966-09-09 1969-12-09 Nat Lead Co Shipping container for radioactive materials having corner shielding means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113089A (en) * 1954-11-24 1963-12-03 Martin Marietta Corp Shield for intercepting radiant energy from an atomic reactor
US3008050A (en) * 1957-08-01 1961-11-07 Jersey Prod Res Co Apparatus for logging well bores
US3132998A (en) * 1958-09-01 1964-05-12 Atomic Energy Authority Uk Nuclear reactors
US3121794A (en) * 1959-10-12 1964-02-18 Kalman M Held Scattering radiation shield
US3239424A (en) * 1962-03-20 1966-03-08 Atomic Energy Authority Uk Neutron shielding
US3483381A (en) * 1966-09-09 1969-12-09 Nat Lead Co Shipping container for radioactive materials having corner shielding means

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2872956A1 (fr) * 2004-07-12 2006-01-13 Cogema Logistics Sa Dispositif externe d'evacuation de chaleur pour emballage destine au stockage et/ou au transport de matieres nucleaires
WO2006016082A1 (fr) * 2004-07-12 2006-02-16 Tn International Dispositif externe d'evacuation de chaleur pour emballage destine au stockage et/ou au transport de matieres nucleaires
US20140219411A1 (en) * 2013-02-06 2014-08-07 Westinghouse Electric Company Llc Alternate passive spent fuel pool cooling systems and methods
US9646726B2 (en) * 2013-02-06 2017-05-09 Westinghouse Electric Company Llc Alternate passive spent fuel pool cooling systems and methods
US10236086B2 (en) 2013-02-06 2019-03-19 Westinghouse Electric Company Llc Alternate passive spent fuel pool cooling systems and methods

Also Published As

Publication number Publication date
BE735687A (fr) 1970-01-05
FR2012489A1 (fr) 1970-03-20
GB1266684A (fr) 1972-03-15
DE1934048A1 (de) 1970-01-15
DE1934048B2 (de) 1978-02-23

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