EP3226249B1 - Systeme de recipient et procede de reequipement ignifuge d'un recipient - Google Patents

Systeme de recipient et procede de reequipement ignifuge d'un recipient Download PDF

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Publication number
EP3226249B1
EP3226249B1 EP16162939.9A EP16162939A EP3226249B1 EP 3226249 B1 EP3226249 B1 EP 3226249B1 EP 16162939 A EP16162939 A EP 16162939A EP 3226249 B1 EP3226249 B1 EP 3226249B1
Authority
EP
European Patent Office
Prior art keywords
container
hood
outer layer
arrangement according
lid
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.)
Active
Application number
EP16162939.9A
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German (de)
English (en)
Other versions
EP3226249A1 (fr
Inventor
Roland Hüggenberg
Linus Bettermann
Martin Berthold
Andre Leber
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.)
GNS Gesellschaft fuer Nuklearservice mbH
Original Assignee
GNS Gesellschaft fuer Nuklearservice mbH
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.)
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Publication date
Application filed by GNS Gesellschaft fuer Nuklearservice mbH filed Critical GNS Gesellschaft fuer Nuklearservice mbH
Priority to EP16162939.9A priority Critical patent/EP3226249B1/fr
Publication of EP3226249A1 publication Critical patent/EP3226249A1/fr
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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
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/10—Heat-removal systems, e.g. using circulating fluid or cooling fins
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C99/00—Subject matter not provided for in other groups of this subclass
    • A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
    • A62C99/0036—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using foam
    • 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 container arrangement for receiving radioactive inventory, comprising a container and a hood which can be pushed over at least a portion of the container.
  • the container has a container bottom, a container jacket and a container lid.
  • the hood encloses the container lid and at least a majority of the container jacket.
  • the invention further relates to a method for refractory retrofitting of a container for receiving radioactive inventory, wherein a hood is placed over the container
  • a bag-like protective cover is placed over the container.
  • the protective cover may consist of film or fibers, which are not flammable and not pyrolyzing at standard firing temperatures.
  • the bag-like protective cover requires a comparatively large strength in order to achieve a corresponding heat insulation. So it was found that the bag-like protective cover should be several centimeters thick for the purpose of thermal insulation for the subsequent fire training. However, this is firstly uneconomical and secondly in handling unfavorable. In addition, some of the radioactive inventory still emits residual heat radiation. This residual heat radiation is retained by the bag-like protective cover, resulting in higher temperatures in the containers. As a result, the containers must be designed for higher temperatures, which means a greater production cost.
  • the document DE4004037C1 discloses a container assembly for receiving radioactive inventory, comprising a container and a cap over a portion of the container underneath, the container having a container bottom, a container shell and a container lid, wherein the hood encloses the container lid and a part of the container shell, wherein the hood an inner, the container facing and an outer, facing away from the container layer, and wherein the thermal conductivity of the outer layer is reduced by the action of heat.
  • the invention is therefore based on the technical problem of specifying a container arrangement of the type mentioned, in which the described disadvantages can be avoided.
  • the invention is the technical problem of specifying a container arrangement of the type mentioned, in which the radioactive inventory can cool, but at the same time is protected from external heat in case of fire.
  • the invention is preferably based on the technical problem of specifying a container arrangement which, despite the hood, is easy to handle.
  • the invention teaches a container assembly for receiving radioactive inventory, comprising a container and a capable over at least a portion of the container hood, the container having a container bottom, a container shell and a container lid, wherein the hood, the container lid and at least a predominant part of the container casing encloses, wherein the hood has an inner, the container facing and an outer, the container facing away from the layer, the heat conductivity of the outer layer is reduced by heat, and wherein the hood by means of at least one fixing element reversibly attached to the container is.
  • the container bottom is preferably in one piece and more preferably integrally formed with the container shell, so that there is a lower container part.
  • the hood encloses the entire container shell.
  • a bottom cap encloses the container bottom, which bottom cap is conveniently connected to the hood and preferably welded to the hood.
  • the reduction of the thermal conductivity of the outer layer can be done for example by foaming, dehydration, material conversion or by combinations of these processes in the outer layer.
  • the thermal conductivity of the outer layer is at least temporarily reduced by at least a factor of 5 and preferably by at least a factor of 10 by the effect of heat.
  • the outer layer has a lacquer.
  • the outer layer comprises at least one organic constituent and preferably plastic.
  • the outer layer comprises a polyacrylate varnish or an epoxy varnish. Due to a good impact resistance, an epoxy resin paint is particularly preferred. Conveniently, the paint is a two-component paint.
  • the inner layer comprises a metal and preferably a steel.
  • the inner layer is suitably a sheet.
  • the inner layer comprises a structural steel, which is optionally provided with a corrosion protection.
  • the inner layer comprises a stainless steel.
  • the outer layer has a lower thermal conductivity than the inner layer.
  • the inner layer serves as a substrate. It has proven to be advantageous that the outer layer is applied to the inner layer.
  • the outer layer can be foamed by the action of heat.
  • the outer layer expediently contains a blowing agent which evaporates blowing agent preferably between 100 and 400 ° C.
  • the outer layer preferably comprises a carbon source, preferably in the form of a polyvalent alcohol.
  • the outer layer contains an acid supplier, which acid supplier is preferably suitable for charring the carbon supplier.
  • the outer layer is formed such that forms a carbon foam when exposed to heat.
  • melamine polyphosphate serves as an acid and propellant supplier.
  • the outer layer is dehydrated by the action of heat.
  • Dehydration advantageously takes place upon conversion of an acid supplier.
  • the acid supplier is, for example, melamine polyphosphate.
  • dehydration of the outer layer results in endothermic cooling of the container assembly.
  • the hood has a circumferential weld.
  • the hood is composed of a hood cover and a hood coat. It is preferred that the hood cover and the hood jacket are connected to each other by means of the peripheral weld.
  • the circumferential weld is preferably arranged in the upper half of the hood. It is advantageous if the hood cover is made by deep drawing.
  • the hood shroud is rolled up from a corresponding metal sheet, wherein expediently two abutting sheet metal edges are connected to each other by means of an axis-parallel weld. It is advantageous that the hood or the hood jacket has an axially parallel weld.
  • the outer layer is reinforced by means of fibers.
  • the fibers are embedded in the outer layer.
  • the fibers are glass fibers. It is particularly preferred that the fibers form a fiber web.
  • the thickness of the outer layer is 0.5 to 25 mm, preferably 1 to 15 mm and particularly preferably 2 to 8 mm.
  • the thickness of the inner layer is 1 to 15 mm, preferably 1.5 to 10 mm, and more preferably 2 to 5 mm.
  • a decontaminable layer according to ISO 8690 is arranged on the outer layer.
  • the container shields the radioactive radiation of the inventory such that the container is storable.
  • the hood is not required for radioactive shielding. Quite advantageously, the hood serves only refractory retrofitting.
  • the shelf life of the container is preferably based on relevant European standards.
  • the hood is fastened to the container by means of at least one fixing element.
  • at least three and more preferably four fixing elements are provided.
  • the fixing elements are conveniently attached to the container lid.
  • the at least one fixing element is preferably a screw.
  • the outer diameter of the screw (radially outermost point of the thread of the screw) is expediently between 34 and 66 mm, and preferably between 40 and 58 mm, these being particularly preferably M42, M48 or M56 screws.
  • the fixing element has a fastening element.
  • fasteners are, for example, hooks, eyes or thread into consideration.
  • the fixing element has a fastening element in the form of an internal thread. It is expedient that the internal thread has an inner diameter between 22 and 38 mm.
  • the inner diameter is between 24 and 36 mm. Inner diameter is preferably understood to be determined by the radially innermost points of the internal thread.
  • the container lid has at least one load attachment point for handling the container or the container arrangement.
  • at least three and preferably four load attachment points are provided.
  • the load attachment points are formed in the form of internal threads.
  • the inner diameters are preferably between 34 and 66 mm and more preferably between 40 and 58 mm.
  • the load attachment point or points in the container lid are very particularly preferably M42, M48 or M56 bores.
  • the invention teaches a method for refractory retrofitting a container for receiving radioactive inventory, in particular according to the container assembly according to the invention, wherein the container has a container bottom, a container shell and a container lid, wherein over at least a portion of the container, a hood slipped is so that the hood encloses the container lid and at least a majority of the container shell, the hood having an inner, facing the container and an outer, the container facing away from the layer, the heat conductivity of the outer layer is reduced in the event of heat and wherein the hood is reversibly secured to the container by means of at least one fixing element.
  • the invention is based on the finding that a static fire protection layer, for example a mat made of glass fibers, due to the constant heat-insulating effect is only of limited advantage.
  • a static fire protection layer for example a mat made of glass fibers
  • the invention provides that the thermal conductivity can be reduced by the action of heat. This allows a good cool down normally and a good one Fire protection in case of fire.
  • Foamable layers which comprise, for example, a lacquer, have proved to be particularly advantageous. Due to a good impact resistance, in particular epoxy resin coatings have proven to be advantageous.
  • the outer layer forms a carbon foam in case of fire, which allows a high resistance to fire.
  • the hood is fastened by means of fixing elements in the form of screws to the container, wherein the screws additionally have an internal thread.
  • the internal thread of the screws serves as load attachment point for the entire container assembly. Consequently, the fixing elements initially fulfill the function of fixing the hood to the container and then also the function of a load stop.
  • Fig. 1 shows an inventive and greatly simplified container arrangement with a container 1, over which container 1, a hood 2 is slipped.
  • the container 1 has a container bottom 3, a container casing 4 and a container lid 5.
  • the container bottom 3 and the container jacket 4 form a one-piece, integral container bottom part 3, 4.
  • the container lid 5 is attached to the container shell 4, for example by means of screw, welding and / or bolt connections.
  • at least one in Fig. 1 not shown seal for a corresponding tightness between the container bottom part 3, 4 and the container lid. 5
  • the shows Fig. 1 an enlargement of the hood 2 in the region of the container shell 4.
  • the hood 2 has an inner layer 6, which consists of structural steel with a corrosion protection layer and 2 to 5 mm thick.
  • an outer layer 7 is arranged, which has a paint, preferably an epoxy resin.
  • the thickness of the outer layer 7 is 2 to 8 mm.
  • a decontaminable layer 8 was applied, which is designed to be particularly smooth and ensures a correspondingly good decontaminability in the sense of ISO 8690 (corresponds to DIN 25415, Part 1).
  • the decontaminatable layer 8 may for example be 1.5 mm thick.
  • an air gap of 1 to 5 mm thickness is located between the inner layer 6 and the surface of the container jacket 4 for the purpose of tolerance.
  • the outer layer 7 is foamed by the action of heat, so that the thermal conductivity of the outer layer 7 is reduced.
  • the thermal conductivity may be reduced by a factor of 5 to 50 over a period of a few minutes to a few hours.
  • the outer layer 7 contains, for the purpose of foamability, a blowing agent which evaporates between 100 and 400 ° C.
  • the outer layer contains at least one carbon source, which provides a liquid with predominantly carbon between 100 and 400 ° C. In the case of a fire, a carbon foam is provided, which significantly reduces the thermal conductivity over many minutes to a few hours. As a result, the container jacket is delayed in time exposed to the action of heat, so that the container can withstand a fire longer accordingly longer.
  • the acid and blowing agent used is, for example, melamine polyphosphate.
  • a carbon source for example, pentaerythritol comes into question.
  • Fig. 2 the container assembly is shown in perspective with a view of the top of the container assembly. To recognize is essentially the hood 2, which only at the bottom of the Fig. 2 almost completely encloses the apparent container 1.
  • a total of four load attachment points 11 for handling the container 1 or the container arrangement are shown at the top of the container arrangement.
  • the load attachment points 11 are arranged in the form of threaded bores in the container lid 5.
  • the hood 2 is fastened to the container 1 or to the container lid 5.
  • the load attachment points 11 are distributed over the top of the container assembly.
  • the number and the position of the load attachment points 11 are selected such that the container 1 or the container arrangement, when conveyed by means of a transport device, are suitable for a wide variety of transport situations.
  • Two of the four load attachment points 11 are opposite each other with respect to the rotationally symmetrical longitudinal axis.
  • One of these two load attachment points 11 also forms an equilateral triangle with the other two load attachment points 11. In other words, this configuration of the load attachment points offers the possibility that the container or the container assembly is conveyed by a conveyor with two or three load stops.
  • Fig. 2 is on the hood 2 also a circumferential weld 14 can be seen.
  • the circumferential weld 14 connects a hood cover 16 with a hood shell 17.
  • the hood 2 also has an axially parallel weld 15, because the hood shell 17 was made of a correspondingly curved piece of sheet metal, which was welded to its abutting sheet edges.
  • the hood cover 16 is made by deep drawing.
  • Fig. 3 is a part of the container lid 5 in a longitudinal section shown such that one of the load attachment points 11 is visible.
  • the load attachment point 11 in the form of a threaded bore receives one of the screws in itself, whereby the hood 2 is clamped on a screw head 12 of the screw on the top of the container lid 5 and whereby the attachment of the hood 2 is secured to the container 1.
  • the fixing element 9 of this embodiment further comprises a fastener 10 for a load stop.
  • the fastener 10 is arranged in the form of a threaded bore within the screw, starting from the top of the screw. Consequently, the container assembly can be secured by means of the fastener 10 to a conveyor and transported by this.
  • the fixing elements 9 in the form of screws therefore serve equally as attachment for the hood 2 and as a load stop.
  • seal 13 is sealed.
  • the seal 13 comprises a trapezoidal groove in which a sealing ring is inserted.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Claims (12)

  1. Ensemble de récipient destiné à recevoir un stock radioactif, comprenant un récipient (1) ainsi qu'au moins une coiffe (2) apte à être placée sur au moins une partie du récipient (1), dans lequel le récipient (1) comporte un fond de récipient (3), une enveloppe de récipient (4) et un couvercle de récipient (5), dans lequel la coiffe (2) entoure le couvercle de récipient (5) et au moins une majeure partie de l'enveloppe de récipient (4), dans lequel la coiffe (2) présente une couche intérieure (6) tournée vers le récipient (1) et une couche extérieure (7) opposée au récipient (1), dans lequel la conductivité thermique de la couche extérieure (7) est réduite sous l'action de la chaleur, et dans lequel la coiffe (2) est fixée de façon réversible au récipient (1) à l'aide d'au moins un élément de fixation (9).
  2. Ensemble de récipient selon la revendication 1, dans lequel l'élément de fixation (9) présente un élément de montage (10) pour l'accrochage d'une charge.
  3. Ensemble de récipient selon l'une des revendications 1 ou 2, dans lequel la couche extérieure (7) présente un vernis.
  4. Ensemble de récipient selon l'une des revendications 1 à 3, dans lequel la couche intérieure (6) présente un métal et de préférence un acier.
  5. Ensemble de récipient selon l'une des revendications 1 à 4, dans lequel la couche extérieure (7) est expansée par l'action de la chaleur.
  6. Ensemble de récipient selon l'une des revendications 1 à 5, dans lequel la couche extérieure (7) est déshydratée par l'action de la chaleur.
  7. Ensemble de récipient selon l'une des revendications 1 à 6, dans lequel la coiffe (2) présente une soudure périphérique (14).
  8. Ensemble de récipient selon l'une des revendications 1 à 7, dans lequel la couche extérieure (7) est renforcée par des fibres.
  9. Ensemble de récipient selon l'une des revendications 1 à 8, dans lequel l'épaisseur de la couche extérieure (7) mesure entre 0,5 et 25 mm, de préférence entre 1 et 15 mm et de façon particulièrement préférentielle entre 2 et 8 mm.
  10. Ensemble de récipient selon l'une des revendications 1 à 9, dans lequel l'épaisseur de la couche intérieure (6) mesure entre 1 et 15 mm, de préférence entre 1,5 et 10 mm et de façon particulièrement préférentielle entre 2 et 5 mm.
  11. Ensemble de récipient selon l'une des revendications 1 à 10, dans lequel le couvercle de récipient (5) présente au moins un point d'accrochage de charge (11) pour la manipulation du récipient (1) ou de l'ensemble de récipient.
  12. Procédé pour la modernisation réfractaire d'un récipient (1) destiné à recevoir un stock radioactif, en particulier selon l'une des revendications 1 à 11, dans lequel le récipient (1) comporte un fond de récipient (3), une enveloppe de récipient (4) et un couvercle de récipient (5), dans lequel une coiffe (2) est placée sur au moins une partie du récipient (1), de telle façon que la coiffe (2) entoure le couvercle de récipient (5) et au moins une majeure partie de l'enveloppe de récipient (4), dans lequel la coiffe (2) présente une couche intérieure (6) tournée vers le récipient (1) et une couche extérieure (7) opposée au récipient (1), dans lequel la conductivité thermique de la couche extérieure est réduite par l'action de la chaleur et dans lequel la coiffe (2) est fixée de façon réversible au récipient (1) à l'aide d'au moins un élément de fixation (9).
EP16162939.9A 2016-03-30 2016-03-30 Systeme de recipient et procede de reequipement ignifuge d'un recipient Active EP3226249B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16162939.9A EP3226249B1 (fr) 2016-03-30 2016-03-30 Systeme de recipient et procede de reequipement ignifuge d'un recipient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16162939.9A EP3226249B1 (fr) 2016-03-30 2016-03-30 Systeme de recipient et procede de reequipement ignifuge d'un recipient

Publications (2)

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EP3226249A1 EP3226249A1 (fr) 2017-10-04
EP3226249B1 true EP3226249B1 (fr) 2018-12-12

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EP16162939.9A Active EP3226249B1 (fr) 2016-03-30 2016-03-30 Systeme de recipient et procede de reequipement ignifuge d'un recipient

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016108947A1 (de) 2016-05-13 2017-11-16 Daher Nuclear Technologies Gmbh Anordnung zum Transport von radioaktivem Material sowie Verfahren zur Erhöhung des Brandschutzes einer solchen Anordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1514623B2 (de) * 1965-11-22 1971-01-07 Siemens AG, 1000 Berlin u. 8000 München Transportbehälter für verbrauchte Brennelemente von Kernreaktoren
DE4004037C1 (en) * 1990-02-10 1991-05-23 Siempelkamp Giesserei Gmbh & Co, 4150 Krefeld, De Storage container for radioactive substance - comprises cast iron lower section and lid with soft elastic seal
DE29913126U1 (de) * 1999-07-27 1999-09-30 Schneider, Ekkehard, Dipl.-Ing., 57610 Altenkirchen Freistehend aufzustellender Tank zur Lagerung von brennbaren Flüssigkeiten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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