EP0660335B1 - Dispositif de prévention des surpressions dans des conteneurs de stockage renfermant un produit dégageant de l'hydrogène - Google Patents

Dispositif de prévention des surpressions dans des conteneurs de stockage renfermant un produit dégageant de l'hydrogène Download PDF

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Publication number
EP0660335B1
EP0660335B1 EP94119896A EP94119896A EP0660335B1 EP 0660335 B1 EP0660335 B1 EP 0660335B1 EP 94119896 A EP94119896 A EP 94119896A EP 94119896 A EP94119896 A EP 94119896A EP 0660335 B1 EP0660335 B1 EP 0660335B1
Authority
EP
European Patent Office
Prior art keywords
container
hydrogen
water
agent
receptacle
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
EP94119896A
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German (de)
English (en)
Other versions
EP0660335A1 (fr
Inventor
Heinz Dr. Heimbach
Hans-Jürgen Dr. Steinmetz
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.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich GmbH
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Publication of EP0660335A1 publication Critical patent/EP0660335A1/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

Definitions

  • the invention relates to a device for avoiding overpressures in storage containers for hydrogen-developing, in particular radioactive, waste materials, with a container for converting hydrogen into water containing a container.
  • Radioactive waste is stored in closed containers for long periods. Due to radiolytic decomposition and as a result of electrochemical reactions, hydrogen is generated in radioactive waste, in particular in those with highly compressed radioactive mixed waste. For example, Release 100% of highly compressed radioactive mixed wastes stored in conventional containers of 200 l within 100 days up to 1300 l of hydrogen. This gas development can lead to considerable overpressure and thus to bulges and / or leaks in the respective waste containers. When storing radioactive waste containers, however, their integrity must be guaranteed and furthermore it must be ensured that no further danger from the escape of hydrogen and possibly detonating gas formation can occur.
  • EP-A-0 383 153 already describes an arrangement provided in a passage opening of the container or lid, which contains a filling material between gas-permeable boundaries, which contributes to the catalytic oxidation of hydrogen Storage temperature is enabled.
  • the water formed can escape unhindered from the container.
  • this problem solution does not take into account the fact that water containing tritium is formed and can be released to the surroundings of the container.
  • a catalyst packing provided with an additional desiccant in a gas-permeable envelope has long been known (DE 2856243 C2), which can be found at possible exit points of containers such as e.g. can be provided sealingly below the container lid, but the usability of this arrangement, which is accessible from the start, does not appear to be guaranteed over long periods.
  • a function of reducing the pressure in the container is not mentioned in DE 28 56 243 C2.
  • the aim of the invention is now an arrangement with which a useful means for reducing pressure in the event of hydrogen evolution in the closed container is available even over long periods of time.
  • the device according to the invention of the type mentioned at the outset is characterized in that the container has both means for converting the hydrogen into water and drying agent in a gas-tight space which is connected to the environment via a rupture disk.
  • Such a bursting unit integrated in the waste container gives a previous one in particular when a certain internal container pressure is exceeded Shielding gas stored combination of hydrogen / oxygen recombination catalyst or water-forming chemical oxidizing agent and a desiccant free. Both components are effective both at room temperature and at final storage temperature.
  • the bursting unit protects the catalytic converter or the oxidizing agent and desiccant from undesired contact with inactivating waste components until the need is reached.
  • the bursting unit is advantageously screwed or glued to the inside of the container lid with the rupture disk pointing upwards or downwards. However, it can also be otherwise fixed in the container or placed without attachment and in particular mechanically protected by an excellent grid.
  • the bursting unit essentially consists of a cup-shaped container 2 with a closed bottom.
  • blind holes and through holes are made distributed over the circumference.
  • the blind holes serve to fasten the circular cover 12 and the underlying sealing washer 15 by means of the washers 13 and screws 14 .
  • the through bores receive threaded rods 23 embedded in the container lid 1 , via which the entire bursting unit is fastened to the container lid by means of the washers 18 and nuts 19 .
  • the lid 12 has an opening in which the rupture disc 17 and one arranged above it Protective grille 16 are attached.
  • rupture disks made of graphite or graphite coated on one or both sides with PTFE for example type HYKARB from Ralph Coidan Equipment Ltd., in particular at 150 to 200 mbar differential pressure. (Cleveland, USA), rupture disks made of various metals or alloys, e.g. type BS & B from Bormann & Neupert (Düsseldorf), as well as rupture disks made of PTFE or Teflon®, e.g. type COV from Strikomaschinestechnik (Wiehl) have proven to be suitable.
  • desiccants Inside the container 2 there are two layers of desiccants with different effects below the water vapor permeable separating layers 4 and 6 .
  • desiccants are molecular sieves, dewatered aquo complexing agents, such as copper sulfate, or hygroscopic chemicals such as calcium chloride, magnesium sulfate or phosphorus pentoxide, optionally on a carrier material.
  • a layer of a chemical oxidizing agent in particular an oxide with a high oxidation potential, which is held by the gas-permeable separating layer 21 , above the separating layer 6 .
  • a chemical oxidizing agent in particular an oxide with a high oxidation potential
  • manganese dioxide activated with traces of silver is particularly effective as an oxidizing agent, which can be used as a powder or in pressed form.
  • Version B of the bursting unit contains two networks 7 and 9 with applied hydrogen / oxygen recombination catalyst above the separation layer 6 .
  • platinum or palladium-coated nets in particular type E2993AE100 (Pt) or L1993CB003 (Pd) from DODUCO GmbH & Co. (Sinsheim) are particularly suitable here.
  • spacer rings 3 , 5 and 20 , 22 or 24 , 8 and 10 To fix the separating layers 4 and 6 and the separating layer 21 or the nets 7 and 8 are used in the Container 2 inserted spacer rings 3 , 5 and 20 , 22 or 24 , 8 and 10 .
  • the flexible ring 11 located between spacer ring 20 ( version A ) or 10 ( version B ) and sealing washer 15 serves to compensate for tolerances in the thickness of the spacer rings.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Processing Of Solid Wastes (AREA)
  • Packages (AREA)
  • Closures For Containers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (7)

  1. Dispositif de prévention des surpressions dans des conteneurs de stockage (1) pour des déchets dégageant de l'hydrogène, en particulier des déchets radioactifs, avec un récipient (2 ; 12) incorporé dans le conteneur et contenant un moyen destiné à transformer l'hydrogène en eau, caractérisé en ce que le récipient (2 ; 12) comporte un moyen pour transformer l'hydrogène en eau, ainsi qu'un dessicateur dans un espace fermé en soi et qui est relié au milieu ambiant au moyen d'une plaque de rupture (17).
  2. Dispositif selon la revendication 1, caractérisé en ce que le récipient (2 ; 12) a la forme d'une boîte en forme d'écuelle avec une plaque de rupture (17) comme fermeture, au-dessus de laquelle est disposée une grille de protection (16).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la boîte est pourvue d'éléments de fixation (18 ; 19 ; 23), et des éléments correspondants sont prévus sur la paroi interne du conteneur ou sur la face interne du couvercle.
  4. Dispositif selon l'une des revendications précédentes, caractérisé par un agencement en couches (A et B) de dessicateur et d'agent formant de la vapeur d'eau au-dessous de la plaque de rupture (17).
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'on prévoit du gel de silice comme dessicateur.
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'agent formant de la vapeur d'eau est formé d'un catalyseur de transformation d'hydrogène/oxygène ou, en particulier, d'un oxyde ayant un potentiel d'oxydation élevé.
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'espace fermé en soi est rempli de gaz inerte de pression de remplissage du conteneur.
EP94119896A 1993-12-20 1994-12-16 Dispositif de prévention des surpressions dans des conteneurs de stockage renfermant un produit dégageant de l'hydrogène Expired - Lifetime EP0660335B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4343500 1993-12-20
DE4343500A DE4343500A1 (de) 1993-12-20 1993-12-20 Vorrichtung zur Vermeidung von Überdrücken in Lagerbehältern mit Wasserstoff entwickelndem Inhalt

Publications (2)

Publication Number Publication Date
EP0660335A1 EP0660335A1 (fr) 1995-06-28
EP0660335B1 true EP0660335B1 (fr) 1997-03-19

Family

ID=6505546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94119896A Expired - Lifetime EP0660335B1 (fr) 1993-12-20 1994-12-16 Dispositif de prévention des surpressions dans des conteneurs de stockage renfermant un produit dégageant de l'hydrogène

Country Status (3)

Country Link
EP (1) EP0660335B1 (fr)
DE (2) DE4343500A1 (fr)
ES (1) ES2102129T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6781077B2 (en) 2000-12-14 2004-08-24 Think Outside, Inc. Keyswitch and actuator structure
FR2874120B1 (fr) * 2004-08-09 2006-11-24 Cogema Logistics Sa Procede et dispositif d'elimination des gaz inflammables dans une enceinte fermee et enceinte equipee d'un tel dispositif
FR2879015B1 (fr) 2004-12-07 2007-03-23 Cogema Logistics Sa Dispositif pour assainir et/ou securiser une enceinte de confinement definie dans un dispositif de transport et/ou de stockage de matieres radioactives
FR2925752B1 (fr) 2007-12-21 2012-03-09 Tn Int Dispositif de transport et/ou de stockage de matieres radioactives concu pour permettre la liberation controlee d'oxygene dans une enceinte fermee
JP2019026361A (ja) * 2017-08-02 2019-02-21 宇部興産株式会社 都市ゴミ焼却灰貯蔵用コンテナ及びそれを用いた都市ゴミ焼却灰の貯蔵方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2538255A1 (de) * 1975-08-28 1977-03-10 Guenter Morlock Vorrichtung zur verhinderung unzulaessig hoher freisetzungen von gefaehrlichen, z.b. giftigen, radioaktiven, an luft reagierenden oder dergleichen stoffen aus technischen anlagen nach stoerfaellen
JPS54159590A (en) * 1978-06-08 1979-12-17 Toshiba Corp Leakage prevention device of rupture disk
DE2856243C2 (de) * 1978-12-27 1983-05-19 Kernforschungsanlage Jülich GmbH, 5170 Jülich Vorrichtung zum Abfangen von Tritium aus Behältern
FR2486618B1 (fr) * 1980-07-11 1985-06-28 Lemer & Cie Dispositif de securite constitue par une piece calibree a rupture associee a une capacite sous pression et a paroi deformable
DE3039528A1 (de) * 1980-10-20 1982-06-03 Degussa Ag, 6000 Frankfurt Sicherheitsvorrichtung fuer emballagen, welche wasserstoff abgebende pyrophore metallkatalysatoren enthalten
DE3640958A1 (de) * 1986-11-29 1988-06-09 Schubert Werner Berstkugel
DE3730743A1 (de) * 1987-09-12 1989-03-30 Nuklear Service Gmbh Gns Verfahren zur reduzierung des innendruckaufbaus in einem lagerbehaelter fuer radioaktive abfallstoffe
DE3802755A1 (de) * 1988-01-30 1989-08-10 Kernforschungsanlage Juelich Verfahren zur einlagerung von radioaktiven abfallstoffen
GB8901738D0 (en) * 1989-01-26 1989-03-15 Atomic Energy Authority Uk Recombination catalyst
DE3904149C2 (de) * 1989-02-11 1994-01-20 Kernforschungsz Karlsruhe Vorrichtung an Behältern mit radioaktiven Abfällen zur Verringerung des Innendrucks durch Wasserstoffbildung
GB9123282D0 (en) * 1991-11-02 1991-12-18 British Nuclear Fuels Plc A container

Also Published As

Publication number Publication date
DE4343500A1 (de) 1995-06-22
DE59402144D1 (de) 1997-04-24
ES2102129T3 (es) 1997-07-16
EP0660335A1 (fr) 1995-06-28

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