GB982763A - Improvements applied to means for continuously sorting radioactive elements - Google Patents

Improvements applied to means for continuously sorting radioactive elements

Info

Publication number
GB982763A
GB982763A GB38119/61A GB3811961A GB982763A GB 982763 A GB982763 A GB 982763A GB 38119/61 A GB38119/61 A GB 38119/61A GB 3811961 A GB3811961 A GB 3811961A GB 982763 A GB982763 A GB 982763A
Authority
GB
United Kingdom
Prior art keywords
radio
activity
memory
belt
lump
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
Application number
GB38119/61A
Inventor
Andre Laforet
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB982763A publication Critical patent/GB982763A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/346—Sorting according to other particular properties according to radioactive properties

Landscapes

  • Control Of Conveyors (AREA)
  • Measurement Of Radiation (AREA)

Abstract

982, 763. Sorting according to radio-activity. COMMISSARIAT A L'ENERGIE ATOMIQUE. Oct. 24, 1961 [Oct. 24, 1960], No. 38119/61. Heading G1A. An arrangement for continuously sorting separate lumps of radio-active material e.g. radio-active ore C which are carried at constant speed and at substantially constant intervals on a conveyer belt 1, has a radio-activity detector 3 located facing the belt detecting radio-activity in a zone 4 by emitting pulses the number of which per unit of time is an increasing function of the radio-activity detected from a lump C passing through the zone 4. The pulses are integrated in a threshold integrator (ratemeter) 8 and when the integrated number exceeds a predetermined value, a blocking signal is fed to a memory 9 preventing it from receiving further signals from the integrator 8 thus avoiding any repetition likely to cause errors in sorting. After a lump C has passed through the zone 4 it passes a photo-electric cell 5 which then transmits a pulse through a line 14 to the memory 9 unblocking it to further signals from the integrator 8 and allowing the stored information to be transmitted to an amplifier 10 the amplified information being fed to a delay unit or second memory 11 which controls an electromagnetic valve 7a which operates an ejector 6 at the moment when a lump of predetermined radio-activity passes, after a period of time equal to D/V where D is the distance between the ejector 6 and the photo-electric cell 5, and V is the velocity of the belt. The detector, which is protected from parasitic radiations by a shield 18 of lead bricks, may be formed from a scintillation detector of a sodium iodide crystal actuated by thallium and a photomultiplication tube. The memory 9 may consist of an annular magnetic core arrangement with a rectangular hysteresis loop and the delay device 11 may consist for example of a univibrator or a blocking oscillator. Where means are provided to vary the speed of the belt or the distance between the photoelectric cell and the ejector it is also necessary to provide means for varying the delay caused by the delay unit 11.
GB38119/61A 1960-10-24 1961-10-24 Improvements applied to means for continuously sorting radioactive elements Expired GB982763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR842052A FR1278051A (en) 1960-10-24 1960-10-24 Process and installation for continuous sorting of separate elements according to the value of one of their physical characteristics, in particular according to their radioactivity

Publications (1)

Publication Number Publication Date
GB982763A true GB982763A (en) 1965-02-10

Family

ID=8741375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38119/61A Expired GB982763A (en) 1960-10-24 1961-10-24 Improvements applied to means for continuously sorting radioactive elements

Country Status (5)

Country Link
BE (1) BE609198A (en)
FR (1) FR1278051A (en)
GB (1) GB982763A (en)
LU (1) LU40722A1 (en)
OA (1) OA01335A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427852A1 (en) * 1978-06-05 1980-01-04 Sphere Invest METHOD AND APPARATUS FOR DETECTING A CHARACTERISTIC OF A SERIES OF MOVING OBJECTS
US4275298A (en) * 1977-05-31 1981-06-23 Coal Industry (Patents) Limited Method of and apparatus for determining the proportion of at least one material in a moving mixture of materials
AT522316B1 (en) * 2019-04-10 2020-10-15 Nuclear Eng Seibersdorf Gmbh Process for the treatment and sorting of materials potentially contaminated with radioactive substances

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4275298A (en) * 1977-05-31 1981-06-23 Coal Industry (Patents) Limited Method of and apparatus for determining the proportion of at least one material in a moving mixture of materials
FR2427852A1 (en) * 1978-06-05 1980-01-04 Sphere Invest METHOD AND APPARATUS FOR DETECTING A CHARACTERISTIC OF A SERIES OF MOVING OBJECTS
AT522316B1 (en) * 2019-04-10 2020-10-15 Nuclear Eng Seibersdorf Gmbh Process for the treatment and sorting of materials potentially contaminated with radioactive substances
AT522316A4 (en) * 2019-04-10 2020-10-15 Nuclear Eng Seibersdorf Gmbh Process for the treatment and sorting of materials potentially contaminated with radioactive substances

Also Published As

Publication number Publication date
LU40722A1 (en) 1961-12-18
BE609198A (en) 1962-02-15
OA01335A (en) 1969-02-15
FR1278051A (en) 1961-12-08

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