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WO1990005365A1 - Procede de preparation de dechets radioactifs en vue de leur stockage permanent - Google Patents

Procede de preparation de dechets radioactifs en vue de leur stockage permanent Download PDF

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Publication number
WO1990005365A1
WO1990005365A1 PCT/CH1989/000196 CH8900196W WO9005365A1 WO 1990005365 A1 WO1990005365 A1 WO 1990005365A1 CH 8900196 W CH8900196 W CH 8900196W WO 9005365 A1 WO9005365 A1 WO 9005365A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure vessel
container
outside
radioactive waste
mechanical damage
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.)
Ceased
Application number
PCT/CH1989/000196
Other languages
German (de)
English (en)
Inventor
Ludwig VON LANG
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1990005365A1 publication Critical patent/WO1990005365A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/34—Disposal of solid waste
    • G21F9/36—Disposal of solid waste by packaging; by baling

Definitions

  • the invention relates to a method for preparing radioactive waste for final storage, according to the preamble of claim 1. Furthermore, the invention relates to a pressure vessel for performing this method.
  • radioactive waste requires the highest level of safety for the entire environment. This means direct radiation safety and indirect protection against the escape of radioactive substances and also against corrosion or other chemical or physical decomposition of the containers. Such protection is to be interpreted as long-term protection, which must be adapted to the decay times of the radioactive substances to be deposited. Since radioactive waste also includes products with half-lives of several thousand years, the requirements for storage containers for the radioactive are Accordingly, fabrics are very high. The containers are not only at risk of corrosion from the outside, for example due to unforeseen water ingress into the deposit, but also from the inside if special measures are not taken to avoid such phenomena.
  • radioactive waste at the source into transportable collecting vessels which contain a certain shield, generally in the form of a lead jacket, from the outside.
  • a certain shield generally in the form of a lead jacket
  • Common barrels are e.g. approx. 50 cm in diameter and 80 cm high. These barrels are used for the temporary storage of radioactive waste. Since the waste originates from a wide variety of technical fields, chemical and / or physical conversions, in particular in a gas or air atmosphere, must be expected. Furthermore, the collection vessels are at risk of decomposition due to external corrosion if protective measures are not taken from the outset and their effectiveness is continuously checked.
  • this object is achieved by the features defined in patent claim 1.
  • the advantage of this solution is that the receptacles with the radioactive waste are absolutely hermetically sealed from the outside, and that the interior of a corresponding pressure vessel is free of corrosive gases, e.g. also of air, and that the barrels are mechanically absolutely stable in a certain position to each other, so that even with later vibrations, such as in earthquakes, no mechanical damage can occur which would lead to the formation of cavities.
  • a pressure vessel according to the invention for carrying out the method according to the invention offers radiation protection on the outside, corrosion protection on the inside and outside, and sufficient mechanical strength against external pressure, so that the container can be lowered to great depths, be it in the ground or at sea depths of up to approx . 10,000 meters.
  • the pressure vessel is also hermetically complete - 4 -
  • This termination is also corrosion-resistant.
  • FIG. 1 shows the schematic sectional illustration of a pressure vessel with collecting vessels stored therein, which contain the radioactive waste
  • Fig. 2 shows an example of the closure between parts of a pressure vessel.
  • the pressure vessel 1 shown as an example in FIG. 1 is designed as a spherical vessel. Its wall consists of a steel wall 3, which is covered on the inside with a radiation protection layer 4 and on the outside with a corrosion protection layer 5. An inner plastic protective layer 6 is applied to the radiation protection layer 4 and an outer plastic protective layer 7 is applied to the corrosion layer 5.
  • the steel wall 3 is dimensioned such that a ball with an inner diameter of 5.3 meters can withstand an external pressure of 1150 atm, as prevails at a depth of 10,000 meters.
  • a suitable wall thickness is 125 mm.
  • the radiation protection layer 4 has a thickness of 50 mm in the example. It consists of an intensely radiation-absorbing material.
  • the corrosion protection layer 5 is also 50 mm thick in the example. It consists of an extremely long-term stable corrosion protection material to protect the steel wall 3.
  • the inner plastic protective layer 6 and the outer plastic protective layer 7 are each approximately 20 mm thick in the example. They serve to protect the layers underneath from mechanical damage when filling or depositing the pressure vessel.
  • the plastic protective layers therefore consist of a particularly shock-resistant, yet high-strength and extremely long-term stable plastic. The different layers have an adhesive effect on one another that cannot be removed chemically or physically.
  • The. Pressure vessel 1 is made from two hemispheres which are connected to one another after filling, for example with the aid of the flange connection shown in FIG. 2.
  • a flange 11 attached to the wall of the lower hemisphere interacts with a counter flange 12 on the upper hemisphere.
  • An annular groove 13 in one of the flanges receives an annular tongue or nose 14 in the other flange, so that the mutual position of the hemispheres is immovably determined is.
  • the container is closed by connecting elements 15 which are distributed over the entire circumference of the flange.
  • the pressure vessel 1 is filled by inserting the collecting vessels 2 and then completely filling the interstices with liquid or at least viscous filling material 8. Subsequent solidification of the filling material fixes the position of the collecting vessels 2 immovably. When filling the intermediate spaces, it is imperative to ensure that there are no gas or air pockets or other cavities from which a later corrosion or a buoyancy effect could result from the accumulation of gases.
  • a suitable filling material is e.g. Concrete (e.g. concrete 600).
  • the filling material can also be enriched with radiation-absorbing material.

Landscapes

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

Abstract

Pour la préparation de déchets radioactifs en vue de leur stockage permanent, on place des récipients collecteurs transportables et blindés contenant les déchets à l'intérieur d'un réservoir sous pression (1). Tous les espaces intermédiaires à l'intérieur du réservoir sous pression sont entièrement occupés par un matériau de remplissage (8). Ce volume intérieur entièrement rempli et dans lequel tous les espaces vides ont été supprimés est hermétiquement clos par rapport à l'extérieur. Le réservoir sous pression comporte, du côté intérieur, une couche de protection contre les rayonnements (4) et une couche interne (6) de protection contre les détériorations mécaniques. Du côté extérieur, il présente une couche de protection contre la corrosion (5) et une couche protectrice externe (7). Le réservoir sous pression assure une isolation totale des récipients contenant les déchets radioactifs par rapport à l'extérieur. Aucune détérioration mécanique ou par corrosion n'est possible, même en présence d'eau ou de secousses, par exemple dans le cas de tremblements de terre.
PCT/CH1989/000196 1988-11-09 1989-11-09 Procede de preparation de dechets radioactifs en vue de leur stockage permanent Ceased WO1990005365A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH415688 1988-11-09
CH4156/88-2 1988-11-09

Publications (1)

Publication Number Publication Date
WO1990005365A1 true WO1990005365A1 (fr) 1990-05-17

Family

ID=4270853

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1989/000196 Ceased WO1990005365A1 (fr) 1988-11-09 1989-11-09 Procede de preparation de dechets radioactifs en vue de leur stockage permanent

Country Status (2)

Country Link
AU (1) AU4481689A (fr)
WO (1) WO1990005365A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801946A1 (de) * 1978-01-18 1979-07-19 Amtrust Ag Verfahren zum transportieren und/oder lagern von radioaktive strahlung abstrahlenden gegenstaenden oder substanzen sowie transportabler transport- und/oder lagerungsbehaelter, insbesondere zur durchfuehrung des verfahrens
FR2473213A1 (fr) * 1980-01-07 1981-07-10 Ecopo Dispositif de confinement a long terme de dechets radioactifs ou toxiques et son procede de fabrication
DE3028006A1 (de) * 1980-07-24 1982-02-18 Nukem Gmbh, 6450 Hanau Verfahren zum einschluss fluessiger radioaktiver abfaelle
EP0057867A1 (fr) * 1981-02-03 1982-08-18 Nukem GmbH Conteneur multicouche pour le stockage efficace de longue durée de matériau radioactif

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801946A1 (de) * 1978-01-18 1979-07-19 Amtrust Ag Verfahren zum transportieren und/oder lagern von radioaktive strahlung abstrahlenden gegenstaenden oder substanzen sowie transportabler transport- und/oder lagerungsbehaelter, insbesondere zur durchfuehrung des verfahrens
FR2473213A1 (fr) * 1980-01-07 1981-07-10 Ecopo Dispositif de confinement a long terme de dechets radioactifs ou toxiques et son procede de fabrication
DE3028006A1 (de) * 1980-07-24 1982-02-18 Nukem Gmbh, 6450 Hanau Verfahren zum einschluss fluessiger radioaktiver abfaelle
EP0057867A1 (fr) * 1981-02-03 1982-08-18 Nukem GmbH Conteneur multicouche pour le stockage efficace de longue durée de matériau radioactif

Also Published As

Publication number Publication date
AU4481689A (en) 1990-05-28

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