EP2916326B1 - System zum hermetisch verschliessen einer zugangsöffnung für den zugang in eine kammer für toxische und/oder radioaktive flüssigkeiten - Google Patents

System zum hermetisch verschliessen einer zugangsöffnung für den zugang in eine kammer für toxische und/oder radioaktive flüssigkeiten Download PDF

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Publication number
EP2916326B1
EP2916326B1 EP15157481.1A EP15157481A EP2916326B1 EP 2916326 B1 EP2916326 B1 EP 2916326B1 EP 15157481 A EP15157481 A EP 15157481A EP 2916326 B1 EP2916326 B1 EP 2916326B1
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EP
European Patent Office
Prior art keywords
hollow space
annular
gaskets
control chamber
closing panel
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Application number
EP15157481.1A
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English (en)
French (fr)
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EP2916326A1 (de
Inventor
Renzo Cavini
Marco Testa
Alessia Zanelli
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Comecer SpA
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Comecer SpA
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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
    • G21F7/00—Shielded cells or rooms
    • G21F7/005—Shielded passages through walls; Locks; Transferring devices between rooms

Definitions

  • the present invention concerns a system to hermetically seal an access opening to a chamber suited to contain toxic and/or radioactive fluids.
  • the present invention finds an advantageous, but not exclusive, application in ports or mobile doors for closing an access opening to a bunker containing a cyclotron for the production of radiopharmaceuticals, to which the following description will make explicit reference without thereby losing its generality.
  • a bunker containing a cyclotron must have a high degree of confinement and tightness to prevent the highly radioactive and toxic gases produced during the cyclotron operation from coming out of the bunker and contaminating the outside environment.
  • the most critical area subject to this confinement is the sealing system of the mobile door closing the access opening to the bunker.
  • the object of the present invention is to provide a system to hermetically seal an access opening to a bunker, said system allowing to simplify the qualification procedure of environmental insulation of the bunker and, at the same time, being of easy and economic realization.
  • Korean patent KR 100760597 B1 discloses an hermetic substrate transportation container, which serves to permit storage of an electronic substrate, to keep a rise of internal moisture concentration low, thus preventing generation of natural oxidation film on the surface of the electronic substrate and allowing detection of the contents inside the substrate transportation container from outside.
  • the substrate transportation container comprises a container body having an aperture for loading and unloading the electronic substrate, and a lid for sealing such aperture, and the container body and the lid are made of a material having an amorphous polyolefin as its main constituent.
  • Japanese patent application JP 07-142418 A discloses a vertical furnace in which an object to be processed is protected against metallic contamination while enhancing the durability.
  • a boat cap is mounted on a furnace cover provided for a boat elevator such that the boat cap can abut, at the flange thereof, on the lower face of the flange of a reaction tube.
  • a bank part is provided along the periphery of the furnace cover and a seal ring is fitted to the upper face of the bank part.
  • Another seal ring is fitted concentrically to the seal ring onto the upper face of the flange of the boat cap.
  • a hole communicating the seal rings is made through the flange of reaction pipe and a suction port communicating with the hole is provided for a reaction pipe fixing ring.
  • the reference 1 generally indicates an environment whose atmosphere is not harmful to human health
  • 2 indicates the inner chamber of a bunker for a cyclotron, i.e. an environment containing, in use, a dangerous atmosphere to human health due to the presence of radioactive and/or toxic substances.
  • the chamber 2 is defined by walls 4 able to retain radioactive and toxic substances and has a rectangular opening 3 to allow the access of the operator or the passage of objects when the cyclotron is turned off, and therefore when the chamber 2 does not contain any radioactive and/or toxic substances.
  • the sealing system comprises a mobile closing panel, which is formed, for example, by a closing panel 5, sliding parallel to the plane of the opening 3 to be arranged in front of an annular portion 8 of the wall 4 surrounding the opening 3 so as to close the opening 3, and by at least two annular gaskets 15 and 16 ( Figure 2 ), suited to be interposed, concentrically to one another and mutually spaced, between the closing panel 5 and the annular portion 8 to ensure the hermetic sealing.
  • the annular portion 8 comprises at least two mutually concentric annular seats 6 and 7, separated by an annular sub-portion 8a of the annular portion 8, each of the gaskets 14 and 15 being respectively arranged in one of the seats 6 and 7.
  • the seats 6 and 7, and then the seals 14 and 15, have a substantially rectangular shape with rounded corners.
  • the shape of the seats 6 and 7 and of the seals 14 and 15 does not limit the invention, but it is substantially linked to the shape of the opening 3.
  • the gaskets 14 and 15 are two pneumatic or hydraulic dynamic expansion gaskets provided with respective fluid supply ducts 9 and 10 suited to expand the gaskets.
  • Figure 2 shows the gaskets 14 and 15 in their resting configuration, in which they are housed in their respective seats 6 and 7, all substantially below the plane defined by the annular portion 8
  • Figure 3 shows the seals 14 and 15 in their working configuration, in which their respective front portions 14a and 15a project from the seats 6 and 7 and create a seal on the inner surface of the closing panel 5.
  • the interposition of the gaskets 14 and 15 between the closing panel 5 and the annular portion 8 defines a hollow space 18 ( Figures 2 and 3 ) between the inner surface of the closing panel 5, the annular portion 8, and in particular the sub-portion 8a, and the gaskets 14 and 15.
  • the hollow space 18 is in all respects a small chamber separating the chamber 2 from the environment 1 to eliminate or at least to reduce as much as possible the fluid exchange (air and liquid) between the chamber 2 and the environment 1 when the closing panel 5 is closed.
  • the annular portion 8 has a hole 11 at the hollow space 18, i.e. the hole 11 is drilled in the sub-portion 8a, and the sealing system comprises a control chamber 12 ( Figure 1 ) and a conduit 13 to connect the hole 11 to the control chamber 12 so as to connect the hollow space 18 to the control chamber 12.
  • the hole 11 is a through hole, i.e. it passes through the wall 4 of the chamber 2, and has an outer end facing the hollow space 18 and an inner end connected to the conduit 13.
  • the sealing system also comprises one or more valves, for example two valves, to have a minimum of safety redundancy, indicated with 16 and 17 in the figures, arranged in several points of the conduit 13 to allow or block the fluid circulation in the conduit 13.
  • the sealing system also comprises a sucking pump 19 arranged in the control chamber 12 to create a given vacuum in the hollow space 18, so as to suck toxic and/or radioactive fluids that might possibly leak, in use, from the gasket 14, namely from the gasket which is closest to the opening 3, and so as to collect them in the control chamber 12. In this way any small leak of the gaskets 14 and 15 is automatically corrected.
  • the control chamber 12 then becomes a tank of toxic and/or radioactive fluids.
  • the system finally comprises fluid analysis means (not shown) connected to the control chamber 12 to detect the presence of toxic substances in the hollow space 18, for example so-called “particle counting instruments", mass spectrometers or oxygen concentration sensors, and/or to measure physical parameters of the fluids contained in the hollow space 18, for example to measure pressure, temperature and relative humidity of the fluids.
  • fluid analysis means (not shown) connected to the control chamber 12 to detect the presence of toxic substances in the hollow space 18, for example so-called “particle counting instruments", mass spectrometers or oxygen concentration sensors, and/or to measure physical parameters of the fluids contained in the hollow space 18, for example to measure pressure, temperature and relative humidity of the fluids.
  • the aforesaid observations or measurements can be carried out as described in ISO 10648.
  • a method for checking the hermetic seal of the aforesaid sealing system 1 comprising creating and maintaining a given vacuum or a given overpressure in said hollow space 18 by means of a sucking pump 19 or of a compressor arranged in said control chamber 12 and connected to the conduit 13 and measuring the pressure changes in the hollow space 18 during a predetermined amount of time.
  • a sucking pump 19 or of a compressor arranged in said control chamber 12 and connected to the conduit 13 and measuring the pressure changes in the hollow space 18 during a predetermined amount of time.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Gasket Seals (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Measurement Of Radiation (AREA)

Claims (7)

  1. System zum hermetischen Verschließen einer Zugangsöffnung, welche einen Zugang in eine Kammer ermöglicht, die zum Aufbewahren von toxischen und/oder radioaktiven Flüssigkeiten geeignet ist, wobei das System eine bewegbare Verschlussplatte (5) umfasst, die bei Verwendung vor einem ringförmigen Wandabschnitt (8) der Kammer (2) die Öffnung (3) umgebend anzuordnen ist, um so die Öffnung (3) selber zu verschließen, und wenigstens zwei Dichtungen (14, 15), welche eine ringförmige Gestalt aufweisen und dazu geeignet sind, konzentrisch aufeinander zwischen der Verschlussplatte (5) und dem ringförmigen Abschnitt (8) angeordnet zu werden, um so einen hermetischen Verschluss sicherzustellen und einen Hohlraum (18) zwischen der Innenfläche der Verschlussplatte (5), dem ringförmigen Abschnitt (8) und den zwei Dichtungen (14, 15) zu definieren; wobei der ringförmige Abschnitt (8) ein Loch (11) in Übereinstimmung mit dem Hohlraum (18) aufweist; wobei das System einen Steuerkammer (12) und einen Kanal (13) aufweist, um das Loch (11) mit der Steuerkammer (12) zu verbinden, um so eine Kommunikation zwischen dem Hohlraum (18) und der Steuerkammer (12) herzustellen, um somit eine Steuerung des hermetischen Verschlusses des Systems zu ermöglichen, und dadurch gekennzeichnet, dass die Dichtungen aus dynamischen Dehnungsdichtungen (14, 15) bestehen, welche für eine Ausdehnung geeignet sind, wenn sich die Verschlussplatte (5) vor dem ringförmigen Abschnitt (8) befindet.
  2. System nach Anspruch 1 und wenigstens zwei ringförmige Sitze (6, 7) umfassend, welche entlang des ringförmigen Abschnitts (8) angeordnet und voneinander durch einen ringförmigen Unterabschnitt (8a) des ringförmigen Abschnitts (8) getrennt sind, wobei die Dichtungen (14, 15) jeweils in einem entsprechenden Sitz von den zwei Sitzen (6, 7) angeordnet sind, so dass der Hohlraum (18) zwischen der Innenfläche der Verschlussplatte (5) und dem ringförmigen Unterabschnitt (8a) definiert ist; wobei das Loch (11) in dem Unterabschnitt (8a) erzeugt ist.
  3. System nach Anspruch 2, wobei die Dichtungen (14, 15) entsprechende Frontabschnitte (14a, 15a) aufweisen, welche von der durch den ringförmigen Abschnitt (8) definierten Ebene abstehen, zumindest wenn sich die Verschlussplatte (5) vor dem ringförmigen Abschnitt (8) befindet, um so eine Abdichtung mit der Innenfläche der Verschlussplatte (5) zu erzeugen, um den Hohlraum (18) zu definieren.
  4. System nach einem der Ansprüche 1 bis 3 und wenigstens ein Ventil (16, 17) umfassend, welches an einem entsprechenden Punkt des Kanals (13) angebracht ist, um so die Zirkulation von Flüssigkeiten in dem Kanal (13) zuzulassen oder zu unterbinden.
  5. System nach einem der Ansprüche 1 bis 4 und ein Fluidanalysemittel umfassend, das mit der Steuerkammer (12) verbunden ist, um so das Vorhandensein von toxischen Substanzen in dem Hohlraum (18) zu erfassen und/oder physikalische Parameter der in dem Hohlraum (18) enthaltenen Fluide zu messen.
  6. System nach einem der Ansprüche 1 bis 5 und eine Saugpumpe (19) umfassend, welche in der Steuerkammer (12) angeordnet ist, um ein vorgegebenes Vakuum in dem Hohlraum (18) zu erzeugen, um so toxische und/oder radioaktive Fluide abzusaugen, die bei Verwendung möglicherweise an der Dichtung (14), die am nächsten zu der Öffnung (3) ist, austreten könnten, und um diese in der Steuerkammer (12) aufzusammeln.
  7. Verfahren zum Steuern des hermetischen Verschlusses eines Verschlusssystems gemäß einem der Ansprüche von 1 bis 6, wobei das Verfahren umfasst:
    - Erzeugen und Aufrechterhalten eines vorgegebenen Vakuums oder eines vorgegebenen Überdrucks in dem Hohlraum (18) mit Hilfe einer Saugpumpe (19) oder eines Kompressors, die in der Steuerkammer (12) angeordnet sind; und
    - Messen der Druckänderungen in dem Hohlraum (18) während einer vorbestimmten Zeitdauer.
EP15157481.1A 2014-03-03 2015-03-03 System zum hermetisch verschliessen einer zugangsöffnung für den zugang in eine kammer für toxische und/oder radioaktive flüssigkeiten Active EP2916326B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20140103 2014-03-03

Publications (2)

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EP2916326A1 EP2916326A1 (de) 2015-09-09
EP2916326B1 true EP2916326B1 (de) 2017-09-20

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EP15157481.1A Active EP2916326B1 (de) 2014-03-03 2015-03-03 System zum hermetisch verschliessen einer zugangsöffnung für den zugang in eine kammer für toxische und/oder radioaktive flüssigkeiten

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EP (1) EP2916326B1 (de)
DK (1) DK2916326T3 (de)
ES (1) ES2649181T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11851221B2 (en) 2022-04-21 2023-12-26 Curium Us Llc Systems and methods for producing a radioactive drug product using a dispensing unit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3449636B2 (ja) * 1993-11-12 2003-09-22 株式会社日立国際電気 半導体製造装置
JP2001298076A (ja) * 2000-04-12 2001-10-26 Sony Corp 基板搬送コンテナ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11851221B2 (en) 2022-04-21 2023-12-26 Curium Us Llc Systems and methods for producing a radioactive drug product using a dispensing unit

Also Published As

Publication number Publication date
DK2916326T3 (en) 2018-01-02
EP2916326A1 (de) 2015-09-09
ES2649181T3 (es) 2018-01-10

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