US3454761A - Irradiation plant - Google Patents

Irradiation plant Download PDF

Info

Publication number
US3454761A
US3454761A US446978A US44697865A US3454761A US 3454761 A US3454761 A US 3454761A US 446978 A US446978 A US 446978A US 44697865 A US44697865 A US 44697865A US 3454761 A US3454761 A US 3454761A
Authority
US
United States
Prior art keywords
passageway
goods
plant
radiation
conveyor
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
US446978A
Other languages
English (en)
Inventor
Alfred Brunner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Sulzer AG
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 Sulzer AG filed Critical Sulzer AG
Application granted granted Critical
Publication of US3454761A publication Critical patent/US3454761A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C1/00—Reactor types
    • G21C1/30—Subcritical reactors ; Experimental reactors other than swimming-pool reactors or zero-energy reactors
    • G21C1/303—Experimental or irradiation arrangements inside the reactor
    • 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
    • G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K5/00—Irradiation devices
    • G21K5/02—Irradiation devices having no beam-forming means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • This invention relates to an irradiation plant comprising a chamber surrounded by thick walls and containing a source of biologically active radiation.
  • the goods to be irradiated are transported in portions into the irradiation chamber and/or are removed therefrom through a bent passageway.
  • the object of the present invention to provide an irradiation plant wherein the aforesaid disadvantages of conventional irradiation arrangements are avoided.
  • the average cross sectional area of the passageway containing the conveyor is at least twice as large as is necessary for permitting passage of the goods portions to be irradiated.
  • Thepassageway according to the invention includes several narrow passes or defiles whose cross sectional areas are reduced to a size just permitting passage of the goods portions. With this arrangement spaces are formed between the narrow passes which spaces are relatively large and receive only little radiation through the narrow passes and can transmit only little radiation.
  • the aforesaid narrow passes are formed by the same material, for example concrete, which forms the spaces or chambers between the narrow passes. Special advantages, however, are obtained if the narrow passes are formed by relatively thin shields which block ofif at least 50% of the radiation. Such thin screens or shields can easily be so constructed as to permit removal and make the passageway accessible to a crawling person or to a person moving on a roller coaster.
  • the shields are preferably made of a material which is very dense and radiation absorptive, such as lead or deriched uranium.
  • the shields or screens are preferably constructed as doors.
  • the passageway may be made so large that it can be used as regular access tunnel to the radiation chamber and that large replacement parts etc. may be transported through the tunnel.
  • the conveyor for which passages must be kept open is preferably placed along the inner, shorter side of the passageway and the hinges of the screen doors are placed at the outer, longer wall of the passageway.
  • FIGURE 1 is a schematic plan view of a portion of an irradiation arrangement according to the invention.
  • FIGURE 2 is a cross sectional, large scale view of the passageway forming part of the arrangement shown in FIGURE 1.
  • FIGURE 3 is a schematic plan view of a modified passageway according to the invention.
  • FIGURE 4 is a developed longitudinal section of a further modification of a passageway according to the invention.
  • numeral 1 designates a chamber containing a source 2 of biologically active radiation. Adjacent to the source 2 are an upper and a lower run of a conveyor 3 for exposing batches of the goods to be treated to the radiation emanating from the source 2. The greater part of the residual radiation is absorbed by thick walls 4 of the chamber 1 so that living beings outside of the chamber are not endangered.
  • the goods to be irradiated are transported, preferably in small packages, by a loopshaped conveyor 5 through two semicircular passageways 6 and 6' from a receiving station 7 to the conveyor 3 and therefrom to a discharge station 8. If desired, the goods, for example potatoes, may be moved in a continuous stream without forming packages.
  • the passageways 6 and 6' are divided by doors 10 into sectorlike spaces A, B, C, D.
  • a door 10 is shown in large scale in FIGURE 2.
  • the door may consist of a steel frame, not shown, which is covered by 30 mm. thick sheet lead.
  • the door hangs on hinges 11. Provisions may be made on the lower edge and on the left side edge of the door to prevent passage of direct radiation.
  • the part of the door facing the inner side wall of the curved passageway is provided with a recess for accommodating the conveyor 5 and affording passage of the containers 13 for the goods to be irradiated.
  • the conveyor 5 comprises a rail 12 placed at a slight gradient and made fast on the ceiling of the passageway 6.
  • the portions or batches of the substance to be irradiated are received in containers 13 which hang on the rail 12 and roll thereon due to gravity through the passageway 6 to the conveyor 3 and therefrom through the passageway 6'.
  • a positively driven conveyor may be used, for example a travelling chain driven by a motor.
  • a roller conveyor, a belt conveyor, or the like may be used.
  • a single passageway may be provided for supplying the goods to as Well as for removing the goods from the conveyor 3 in the treating chamber 1.
  • FIGURE 3 illustrates an embodiment of the invention wherein the walls of the passageway are not smooth but are crevassed.
  • the corners 30, 31 of the crevasses and the sidewalls of the crevasses extending therefrom are so arranged that when standing in a corner a minimum of surfaces can be seen between which radiation may be exchanged to any appreciable extent.
  • the side walls 32, 33 of each crevasse extending from a corner 31 face such Wall portions of the passageway only which either emit radiation or receive radiation; the side walls of the crevasses should never face wall portions which emit radiation and also wall portions which receive radiation.
  • FIGURE 4 is a developed longitudinal section of a passageway of the type shown in FIGURE 3 wherein, however, the floor and the ceiling are also crevassed.
  • the depth of the crevasses should be as little as possible so that the exterior of the apparatus takes up as little space as possible.
  • a roller conveyor is used wherein rollers 41 are supported between carriers 40.
  • the screens or shields of the arrangement shown in I FIGURE 4 have stationary parts 43 and 44 extending the width of the conveyor and have a movable part 45.
  • the latter is constructed as a drawbridge or trap door. It is shown in the lowered position, bridging the crevasses in the floor of the passageway.
  • An additional plate may be lockably hinged to the trap door 45 which plate is folded onto the trap door when the trap door is folded up, i.e. in vertical position, and which plate is unfolded to cover the portion of the crevasses which are beneath the conveyor. This facilitates servicing of the conveyor because nothing can fall into the crevasses when the trap door is folded down into the horizontal position.
  • a plant for irradiating goods comprising:
  • bent passageway means in said wall means connecting said irradiation chamber with the outside of said wall means for affording passage of the goods to be irradiated to and from said irradiation chamber, said bent passageway means including a pair of spaced opposite'walls defining a passage for the goods,
  • conveying means for conveying the goods through said passagewayin a predetermined path having a crosssectional area substantially as great as required for permitting passage of the goods
  • each pair of adjacent means defining a space therebetween for absorption of radiation emitted from said irradiation chamber.
  • bent passageway means consists of a pair of spaced semicircular passageways, each semicircular passageway being psitioned at an opposite end of said chamber.
  • a plant for irradiating goods comprising:
  • each said bent passageway means including a pair of spaced opposite walls defining a path of a cross-sectional area substantially as great as required for permitting passage of the goods, at least one of said walls having a plurality of crevasses formed therein out of said path, each said crevasse having a pair of opposite sidewalls, the one of the sidewalls of each crevasse nearest an end of said path facing away from said end, and
  • each pair of opposite walls define a semicricular passage.
  • each said sidewall of each crevasse is located in a plane tangent to the opposite wall of said passageway means.
  • a plant as set forth in claim 10 which further comprises a plurality of shields disposed between said walls of said passageway means, each of said shields being mounted between a pair of adjacent crevasses and being disposed across said passageway means, each said shield having a recess therein for accommodating passage of said conveying means therethrough.
  • each said shield prevents penetration of at least 50% of the radiation emitted thereto.
  • a plant for irradiating goods comprising:
  • bent passageway means connecting said irradiation chamber with the outside for affording passage of the goods to be irradiated to and from the irradiation chamber
  • the cross sectional area of said passageway means being at least twice as great as the area required for accommodating said conveying means and for permitting passage of the goods
  • said passageway means including a plurality of narrow passes formed by shields whose cross sectional area is substantially as great as required for accommodating said conveying means and for permitting passage of the goods, said shields preventing penetration of at least 50% of the radiation extending into said passageway means and being movably connected to said wall means for affording temporary opening of said narrow passes to make the area thereof substantially equal to the cross sectional area of said passageway means.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Ventilation (AREA)
  • Radiation-Therapy Devices (AREA)
US446978A 1964-04-13 1965-04-09 Irradiation plant Expired - Lifetime US3454761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH478864A CH413134A (de) 1964-04-13 1964-04-13 Bestrahlungsanlage

Publications (1)

Publication Number Publication Date
US3454761A true US3454761A (en) 1969-07-08

Family

ID=4282544

Family Applications (1)

Application Number Title Priority Date Filing Date
US446978A Expired - Lifetime US3454761A (en) 1964-04-13 1965-04-09 Irradiation plant

Country Status (7)

Country Link
US (1) US3454761A (de)
BE (1) BE662377A (de)
CH (1) CH413134A (de)
ES (1) ES311099A1 (de)
FR (1) FR1433639A (de)
GB (1) GB1078963A (de)
NL (1) NL6405536A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6437344B1 (en) 1999-08-25 2002-08-20 Mpr Associates, Inc. Product irradiation device and method of irradiating products using the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334604A (en) * 1979-03-15 1982-06-15 Casino Investment Limited Coin detecting apparatus for distinguishing genuine coins from slugs, spurious coins and the like
US6191424B1 (en) 1998-12-03 2001-02-20 I-Ax Technologies Irradiation apparatus for production line use

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142759A (en) * 1960-01-20 1964-07-28 Atomic Energy Authority Uk Monorail package irradiation plant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3142759A (en) * 1960-01-20 1964-07-28 Atomic Energy Authority Uk Monorail package irradiation plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6437344B1 (en) 1999-08-25 2002-08-20 Mpr Associates, Inc. Product irradiation device and method of irradiating products using the same

Also Published As

Publication number Publication date
NL6405536A (de) 1965-10-14
ES311099A1 (es) 1968-03-16
BE662377A (de) 1965-10-12
GB1078963A (en) 1967-08-09
FR1433639A (fr) 1966-04-01
CH413134A (de) 1966-05-15

Similar Documents

Publication Publication Date Title
US3676675A (en) Production irradiator
US3224562A (en) Conveyor systems
US3620158A (en) Continuous press
US3454761A (en) Irradiation plant
PT1143814E (pt) Aparelho para tratamento a gas de produtos
DE3264199D1 (en) Distributing device for a conveyor
CN108449985A (zh) 用于物体的非破坏性的材料测试的装置
IT8412417A1 (it) Apparato per il trattamento di nastri di materiale tessile a trasporto continuo con aria in circolazione e specialmente apparato con attrezzatura essiccante
BR9400086A (pt) Aparelho para revestir com produto
US4253005A (en) Microwave suppression apparatus
ATE30134T1 (de) Vorrichtung zum stabilen, synchronen transportieren von fliessmittelpackungen durch behandlungsstationen.
US3353651A (en) Article accumulator
JP4338598B2 (ja) 物品を搬送するための搬送システム
US3749229A (en) Method and apparatus for protecting chain conveyor
US3556286A (en) Endless belt conveyor
JPS60193293A (ja) マイクロ波式連続炉
JP2022144756A (ja) 紫外線照射搬送ローラコンベアおよび紫外線殺菌装置
GB1424431A (en) Process and apparatus for drying porous material
GB1001808A (en) A machine for drying tea leaves
JPH0536322B2 (de)
JP2023159953A (ja) Ｘ線検査装置
DE2615905B1 (de) Vorrichtung zum Transport von band- und/oder blattfoermigem fotografischen Material
JP2007178313A (ja) 電子線照射装置
JP3734861B2 (ja) ばら物運搬用パイプコンベヤにおける粉塵飛散防止装置
JPH0234639Y2 (de)