WO2012168054A2 - Conteneur anti-radiation - Google Patents

Conteneur anti-radiation Download PDF

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Publication number
WO2012168054A2
WO2012168054A2 PCT/EP2012/059334 EP2012059334W WO2012168054A2 WO 2012168054 A2 WO2012168054 A2 WO 2012168054A2 EP 2012059334 W EP2012059334 W EP 2012059334W WO 2012168054 A2 WO2012168054 A2 WO 2012168054A2
Authority
WO
WIPO (PCT)
Prior art keywords
radiation protection
protection container
rod
channel
radiation
Prior art date
Application number
PCT/EP2012/059334
Other languages
German (de)
English (en)
Other versions
WO2012168054A3 (fr
Inventor
Hartmut Damm
Simon Weidenbruch
Original Assignee
Endress+Hauser Gmbh+Co. Kg
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 Endress+Hauser Gmbh+Co. Kg filed Critical Endress+Hauser Gmbh+Co. Kg
Publication of WO2012168054A2 publication Critical patent/WO2012168054A2/fr
Publication of WO2012168054A3 publication Critical patent/WO2012168054A3/fr

Links

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
    • G21F5/015—Transportable or portable shielded containers for storing radioactive sources, e.g. source carriers for irradiation units; Radioisotope containers
    • 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
    • G21F5/02—Transportable or portable shielded containers with provision for restricted exposure of a radiation source within the container
    • 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
    • G21F5/02—Transportable or portable shielded containers with provision for restricted exposure of a radiation source within the container
    • G21F5/04—Means for controlling exposure, e.g. time, size of aperture
    • 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
    • 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
    • G21F5/12—Closures for containers; Sealing arrangements

Definitions

  • the invention relates to a radiation protection container, with a lined externally with a radioactive material absorbing material
  • Radiation protection containers are used in particular for receiving radioactive radiators from radiometric measuring devices.
  • the latter are used in industrial metrology, for example for measuring a filling level of a filling material in a container, for monitoring an exceeding or falling below a predetermined level of a filling material in a container, or for measuring a density of a medium.
  • the basic principle of the radioactive measuring technique is based on the fact that one or more radioactive radiators, such. COO or CS137 preparations are positioned at a measuring location such that the radiation emitted by them is a region to be measured, e.g. penetrates a part of a container filled with a filling material, and a radiation intensity exiting on a side opposite to the radiators with a corresponding detector, e.g. a scintillation detector.
  • the emitted radiation intensity depends on the geometric radiation
  • the radioactive radiators used in radiometric measuring instruments are introduced during their transport to the measuring location and in a variety of measuring instruments and applications during the measurement in a radiation protection container, which serves to the To shield the radiator to the outside in such a way that as far as possible no radiation that is not required for measurement penetrates to the outside.
  • Radiation protection containers regularly made of metal, e.g. out of each other
  • welded steel moldings and are internally coated with a radioactive material, e.g. Lead, poured out.
  • a radioactive material e.g. Lead
  • Radioactive protection containers inevitably have at least one often but also two or even more openings. It is regularly provided an opening through which the radioactive
  • Radiation container leading tubular channel 5 can be used.
  • This specimen holder 1 have at the end a recess for receiving the radiator 7. To achieve a high-quality shield, the specimen holder 1 is inserted as accurately as possible into the channel 5. However, owing to manufacturing tolerances, a gap 9 extending substantially straight-line over the entire length of specimen holder 1 and channel 5 in the direction of opening 3 remains between specimen holder 1 and channel 5, through which radiation can escape. This is indicated in Figures 1 and 2 by arrows P1. There are specimen holder 1, to which - as shown in Fig. 2 - on whose the
  • Closing device radioactive radiation of the positioned in the radiation protection container radiator 7 is emitted via a radiator 7 to the output 1 1 leading radiation channel 13 in the direction of the metrologically detected area.
  • Specimen holder 1 is arranged so that it by rotation of the
  • Specimen holder 1 either directly above the specimen holder 1 arranged to the output 1 1 leading radiation channel 13, or via a laterally adjacent to the beam channel 13 shield 15 can be positioned. Again, there is the problem that due to
  • Radiation channel 13 remains leading gap on which radiation can escape to a limited extent on the path indicated in Fig. 1 by the arrow P2.
  • closure devices are known in which the output
  • I I can be closed by externally in front of the output 1 1 sliding mechanical shutter.
  • shutters can be made sufficiently large and massive so that good shielding can be achieved through them.
  • it is difficult to obtain these relatively large and heavy components mechanically movable. This is further complicated by the fact that radiometric
  • Measuring instruments are usually used in extremely harsh environmental conditions that make the use of alternative measurement methods impossible. There they are often very high or strongly changing temperatures and / or Pressed and / or exposed to strong chemical and / or mechanical stress, which consequently also exposed to the movable shutter.
  • FIG. Fig. 2 shows side by side two
  • Strahlenschutzbehalter is a the leading from the interior to the output 1 1 beam channel perpendicular effet derives.
  • Strahlenschutzbehalter provided in an opening 17 opening another channel 19, in which a rotatably mounted rod-shaped closure element 21 is inserted.
  • the latter has a perpendicular to its longitudinal axis through the closure element 21 through bore B leading.
  • Closure element 21 is opened by being brought by rotation into a position in which the jet channel leads via the bore B to the outlet 1 1, and closed, in which it is rotated to the position shown here, in which the rod-shaped closure element 21 the Radiation channel closes. Again, there is a straight gap 25 between the closure member 21 and the other channel 19 in which it is used, can escape through the radiation to a lesser extent due to manufacturing tolerances and the requirement of rotation of the closure element 21.
  • radiation protection containers are known from the prior art, in the interior of which a single or a plurality of mutually parallel outwardly shielded guide tubes are provided for receiving a corresponding number of preparation rods.
  • Preparation rods are rod-shaped elements, in each of which, preferably in the middle, a radioactive radiator is used. They are used, for example, in applications in which the emitters are lowered in the measurement mode at predetermined heights into a dip tube located under the radiation protection container in a container.
  • the preparation rods are made
  • Radiation protection during transport and preferably during longer lasting measurement breaks in the radiation protection container brought in.
  • radiation protection container emanating from the emitters radiation is the outside by the surrounding the guide tubes
  • the shielding takes place by the segment of the specimen rod itself upstream of the radiator in the respective longitudinal direction.
  • the invention consists in a radiation protection container, with
  • the rod-shaped element over at least a major part of its entire length has a helically rotated along its longitudinal axis outer geometry
  • the channel has a form this same interior, in which the rod-shaped element can be introduced by rotation about its longitudinal axis.
  • the channels are surrounded on the outside by a radix radiation absorbing material.
  • a radix radiation absorbing material According to a first variant of the invention, at least one of
  • the invention comprises a second variant in which
  • Radiation channel is connected to an outlet of the radiation protection container
  • the rod-shaped element is a threaded spindle, esp. A threaded spindle with a round thread, a triangular thread or a trapezoidal thread.
  • the invention comprises a third variant in which
  • Preparation rods are, in each of which one of the radioactive emitters can be used at a predetermined height along its longitudinal axis.
  • Radiation protection container two or more guide tubes arranged parallel to each other, in each of which one can be used equipped with a radioactive preparation rod.
  • Radiation protection container can be introduced into the guide tubes in the radiation protection container by rotation about its longitudinal axis, and
  • the preparation rods are along their longitudinal direction about their longitudinal axis turned rods, esp. Rods with rectangular, square, oval, triangular or star-shaped cross-section.
  • the invention has the advantage that the unavoidable gaps between the channels and the rod-shaped elements closing them do not run in a straight line due to the shaping according to the invention but are also helical. There is no straight line from
  • Fig. 1 shows: a conventional radiation protection container with a
  • Fig. 2 shows: two sectional drawings of a conventional
  • Radiation protection container with a rotatably mounted
  • Fig. 3 shows: two sectional drawings of an inventive
  • Radiation protection container with a specimen holder and a rotatably mounted radiation protection container closure
  • Fig. 4 shows: a radiation protection container according to the invention with
  • the invention relates to a radiation protection container, esp. For a
  • radiometric measuring device with an externally surrounded by a radioactive material absorbing material for receiving at least one radioactive radiator having at least one closable by a rod-shaped element, connecting the interior with an opening of the radiation protection container channel.
  • the rod-shaped element over at least a majority of its entire length, preferably even over its entire length away, a helically rotated along its longitudinal axis outer geometry, and the channel has an inner space for this purpose in which the rod-shaped element by rotation to whose longitudinal axis can be introduced.
  • the latter is equivalent to the fact that a width of a gap between channel and element along the longitudinal axis of the channel is less than that by the helical shape of the channel
  • this gap is not rectilinear, but has in the direction of the longitudinal axis of one of the helical outer shape of the rod-shaped element and the
  • the invention is in connection with a variety of different
  • Fig. 3 shows two sectional drawings in mutually rotated by 90 ° cutting planes of a first embodiment of a radiation protection container according to the invention, in which two variants of the invention are used. Exactly as in the radiation protection container known from the prior art shown in Fig. 2, also shown here
  • Radiation protection container an interior space for receiving a radioactive emitter 7, which via one of a first
  • the first rod-shaped element 23 is also here a specimen holder which has a recess for receiving the radioactive radiator 7 at the end.
  • the rod-shaped element 23 has a helically rotated outer geometry along its longitudinal axis, and the channel 25 has a thereto
  • the rod-shaped element 23 is for this purpose at least over a large part of the entire length of time, preferably - as shown here- over its entire length, preferably designed as a threaded spindle.
  • This can be a threaded spindle with a round thread as in the present embodiment.
  • other thread forms such as e.g. Triangular thread or trapezoidal thread, are used.
  • a radiation channel leading to one of the first openings 27 opposite output 29 of the radiation protection container is connected to the channel 25, via which radiation emanating from the radiator can be emitted in the direction of an area to be detected.
  • Radiation container opening second channel 33 provided in which a second rod-shaped element 35 is arranged.
  • the second rod-shaped element 35 also has a length along at least a large part of its entire length, preferably over its entire length whose longitudinal axis is helically rotated outer geometry, and is screwed into the same inner space of the second channel 33.
  • the second rod-shaped element 35 forms a rotatable
  • the second rod-shaped element 35 can accordingly be brought into an open position by rotation, in which the beam channel 37 connects the interior of the radiation protection container to the outlet 29 of the radiation protection container. In this position, radiation emitted by the emitter 7 exits the exit 29 through the beam channel 37.
  • the second rod-shaped element 35 can be brought into a closed position shown in FIG. 3 by rotation, preferably by 90 ° relative to the opened position, in which the second rod-shaped element 35 closes the outlet 29.
  • the second the protective container closure forming rod-shaped element 35 is preferably used as a threaded spindle, for. B. as shown here as
  • Threaded spindle formed with a round thread or as a threaded spindle with a trapezoidal or triangular thread.
  • the two rod-shaped elements 23, 35 consist of a radioactive material absorbing material. For this they can be considered massive
  • Be formed steel components may also be considered to be complete with an absorber such as e.g. Lead, filled spindle-shaped pipes
  • This form can, for example, by mechanical
  • Forming a cylindrical tube can be made that then
  • correspondingly shaped spindle-shaped tubes can be used at the corresponding positions in the radiation protection container, the remaining free interior then then with a Radiation absorbing material, such as lead is poured out.
  • the radiation protection container can also initially be completely filled with the absorber, and the channels 25, 33 are then exposed by a corresponding mechanical processing of the absorber material, such as milling, in the radiation protection container.
  • Radiation protection container is screwed.
  • the bracket is screwed.
  • Fastening device 39, 41 for safety reasons additionally with a seal and / or a theft protection, such as. one the bolt
  • Radiation protection container and the respective opening 27, 31 Radiation protection container and the respective opening 27, 31.
  • the radiation protection container according to the invention esp. Also in applications can be used in which high temperatures or strong
  • FIG. 4 shows a further variant of an inventive
  • Radiation protection container which is used, for example, when one or more radiators 7 are transported in the radiation protection container to a measuring location at which the radiation protection container then, for. is mounted on a container 45, and the emitters 7 for the measurement of the
  • a channel 49 surrounded on the outside by the absorbing material is provided in the radiation protection container for each emitter 7, into each of which a rod-shaped element 51 can be inserted.
  • the rod-shaped elements 51 are formed in this variant as preparation rods, in each case at a predetermined height along the
  • the channels 49 accordingly form guide tubes for the preparation rods.
  • radioactive emitter 7 can in the radiation protection container a single
  • Guide tube may be provided, or there may be two or - as shown in Fig. 4 - more guide tubes are arranged parallel to each other, in each of which a preparation rod equipped with a radioactive spot 7 preparation rod can be introduced.
  • a preparation rod equipped with a radioactive spot 7 preparation rod can be introduced.
  • Elements 51 according to the invention over at least a majority of their entire length, preferably over their entire length, a helical outer geometry along the longitudinal axis thereof, and the associated channels 49 forming the guide tubes have identical inner spaces into which the rod-shaped elements 51 penetrate Rotation about the longitudinal axis can be screwed.
  • Preparation rods are, for example, in the rods, e.g. Made of steel, with a square over the entire length, rectangular, triangular, star-shaped or oval cross section in the longitudinal direction to be rotated about its longitudinal axis.
  • the production of the guide tubes for example, by appropriately shaped tubes are used in the radiation protection container, which then subsequently with a radioactive radiation
  • absorbent material such as e.g. Lead is poured out, so that the
  • the channels 49 open on a first side of the radiation protection container in each case in openings 53, through which the preparation rods from the
  • Radiation protection container can be left out or introduced into this.
  • a conveyor 55 is provided on a side of the channels 49 opposite these openings 53, via which the
  • Preparation rods For transporting the radiation protection container, introduced into the guide tubes in the radiation protection container under train and rotation thereof about its longitudinal axis in the radiation protection container, and in the reverse direction, esp.
  • a measuring location located under the openings 53, such as, for example, the immersion tube 47 arranged here in the container, can be transported. If the specimen rods, as shown here, lowered to different heights in the dip tube 47, so each radiator 7 radiates through another portion of the container 45. In this way, on the

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Measurement Of Radiation (AREA)

Abstract

L'invention concerne un conteneur anti-radiation comportant un espace intérieur entouré à l'extérieur d'un matériau absorbant le rayonnement radioactif et destiné à recevoir au moins une source de rayonnement radioactif (7), et au moins un canal (25, 33, 49) pouvant être fermé par un élément en forme de barre (23, 35 51) et reliant l'espace intérieur à une ouverture (27, 31, 53) du conteneur anti-radiation. On obtient selon l'invention un blindage enveloppant le plus performant possible de la source de rayonnement (7) placée à l'intérieur du fait que l'élément en forme de barre (23, 35, 51) présente au moins sur une grande partie de sa longueur totale une géométrie extérieure sinueuse le long de son axe longitudinal et que le canal (25, 33, 49) comporte un espace intérieur de forme similaire dans lequel l'élément en forme de barre (23, 35, 51) peut être introduit par rotation autour de son axe longitudinal.
PCT/EP2012/059334 2011-06-09 2012-05-21 Conteneur anti-radiation WO2012168054A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011077304A DE102011077304A1 (de) 2011-06-09 2011-06-09 Strahlenschutzbehälter
DE102011077304.5 2011-06-09

Publications (2)

Publication Number Publication Date
WO2012168054A2 true WO2012168054A2 (fr) 2012-12-13
WO2012168054A3 WO2012168054A3 (fr) 2013-01-31

Family

ID=46124370

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/059334 WO2012168054A2 (fr) 2011-06-09 2012-05-21 Conteneur anti-radiation

Country Status (2)

Country Link
DE (1) DE102011077304A1 (fr)
WO (1) WO2012168054A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9875820B2 (en) 2013-06-19 2018-01-23 Johnson Matthey Public Limited Company Radiation source container

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Publication number Priority date Publication date Assignee Title
FR3001958B1 (fr) * 2013-02-13 2016-02-05 Andra Procede et casier d'entreposage de colis de substances radioactives dans un puits
GB201411573D0 (en) * 2014-06-30 2014-08-13 Johnson Matthey Plc Radiation shielding apparatus
DE102017115788A1 (de) * 2017-07-13 2019-01-17 Vega Grieshaber Kg Strahlenschutzbehälter und Set
DE102020130624A1 (de) 2020-11-19 2022-05-19 Endress+Hauser SE+Co. KG Strahlenschutzbehälter für radiometrische Messgeräte
DE102023116382B3 (de) 2023-06-22 2024-01-11 Vega Grieshaber Kg Strahlenschutzbehälter mit Sicherheitseinrichtung und Verfahren zur Überwachung eines Strahlenschutzbehälters

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US3496361A (en) * 1961-09-12 1970-02-17 Republic Steel Corp Apparatus for producing a collimated beam of radioactive rays
FR91057E (fr) * 1965-04-21 1968-04-05 Saint Gobain Techn Nouvelles Perfectionnements aux irradiateurs
DE7016737U (de) * 1970-05-05 1970-07-30 Vdo Schindling Einrichtung zur messung eines vorgegebenen fuellstandes in einem fluessigkeitsbehaelter.
US4071771A (en) * 1976-06-28 1978-01-31 Ohio-Nuclear, Inc. Shutters for X-ray scanners
US6452200B1 (en) * 1999-05-13 2002-09-17 Mds Nordion Inc. Gap shielded container for a radioactive source
DE20101055U1 (de) * 2001-01-19 2001-03-29 Endress Hauser Gmbh Co Strahlenschutzbehälter
DE20101056U1 (de) * 2001-01-19 2001-03-29 Endress Hauser Gmbh Co Strahlenschutzbehälter

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9875820B2 (en) 2013-06-19 2018-01-23 Johnson Matthey Public Limited Company Radiation source container

Also Published As

Publication number Publication date
WO2012168054A3 (fr) 2013-01-31
DE102011077304A1 (de) 2012-12-13

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