EP0035064A2 - Protection pour le stockage des matériaux radioactifs autochauffants - Google Patents

Protection pour le stockage des matériaux radioactifs autochauffants Download PDF

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Publication number
EP0035064A2
EP0035064A2 EP80107972A EP80107972A EP0035064A2 EP 0035064 A2 EP0035064 A2 EP 0035064A2 EP 80107972 A EP80107972 A EP 80107972A EP 80107972 A EP80107972 A EP 80107972A EP 0035064 A2 EP0035064 A2 EP 0035064A2
Authority
EP
European Patent Office
Prior art keywords
storage
self
packaging
heating
protection according
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.)
Withdrawn
Application number
EP80107972A
Other languages
German (de)
English (en)
Other versions
EP0035064A3 (fr
Inventor
Stefan Ing. Grad. Ahner
Ernst Dr. Warnecke
Konrad Dr. Schmidt
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.)
Nukem GmbH
Original Assignee
Nukem GmbH
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 Nukem GmbH filed Critical Nukem GmbH
Publication of EP0035064A2 publication Critical patent/EP0035064A2/fr
Publication of EP0035064A3 publication Critical patent/EP0035064A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal

Definitions

  • the invention relates to accident prevention for the storage of self-heating radioactive materials, in particular in air-cooled stores, the radioactive materials being enclosed in suitable packaging or leach-resistant particles which are placed in storage containers which can also be used as transport containers, and the space between the packaging or the particles and the storage container is filled with a solid material.
  • Self-heating radioactive materials must be stored temporarily until they are reprocessed or until they are finally disposed of.
  • This intermediate storage takes place mainly in water storage pools, in which the water takes over the cooling and the shielding function.
  • Storage in air-cooled stores has also been proposed, since this type of storage has advantages over storage in water storage tanks, especially when using inherently safe natural draft cooling.
  • cooling means that the shielding function must be ensured by safe barriers that surround the radioactive substances.
  • Such barriers mostly double containers, however prevent direct cooling of the stored goods by the cooling air.
  • the heat dissipation compared to self-heating radioactive material that is in single containers is significantly impaired. It is particularly disadvantageous that the supply of cooling air in the event of a malfunction must practically not be interrupted, since only a very limited “cooling reserve” is available and the stored goods would heat up to an unacceptably high level.
  • This accident protection should be able to cool the self-heating stored goods even if the external cooling fails until intervention measures can be taken without burdening the stored goods packaging with a melt when filling the gap.
  • the object was achieved in that the solid material is used in the form of bulk material, the melting point of which is below the permissible maximum temperature of the self-heating radioactive substance.
  • the storage goods packaging (1) for example compressed gas bottles, with the self-heating storage goods (2), for example Krypton-85, is placed, for example, five times stacked in a storage sleeve (3).
  • the gap between the packaged goods (2) and the bearing bush (3) is filled according to the invention with a loose bed (4).
  • a soft solder granulate is used as a loose bed (4), Grain size approx. 1 mm, melting point 190 o C, composition 40% Pb, 60% Sn.
  • the additional bottle temperature in this example is 200 ° C.
  • the bearing bush (3) is closed with a tightly closing, remote-controlled cover (5) with hold-down device (11).
  • the bearing bush (3) has test connections (6) and is located in a storage shaft (8) with spacer plates (10) of the storage rack (9).
  • the cooling air (7) flows naturally through the annular gap between the storage shaft (8) and the bearing bush (3).
  • the decay heat is transported from the inner storage goods packaging (1) by heat conduction via the solder granulate (4) to the bearing bush (3) and from there to the cooling air (7) flowing past.
  • the maximum bottle temperature is reduced by approximately 50 ° C. compared to storage with a gap that has not been filled.
  • the permissible interruption of cooling air (malfunction) until the solder reaches the melting temperature is extended by approx. 2 hours. It takes another 4 hours until all of the solder granules have melted, so that the duration of the cooling air interruption, which is permitted until the compressed gas cylinders reach their design pressure, is increased by about 6 hours to about four times as long as storage with an unfilled gap becomes.
  • This time saving is sufficient to include and complete intervention measures to eliminate the cooling accident. Compared to filling the gap with a salt or metal melt, this time saving is not prolonged, but there is no burden on the storage goods packaging when pouring out.
  • the accident protection according to the invention can also be applied to other self-heating stored goods, in particular also to glazed, highly radioactive waste and to spent fuel from nuclear reactors.
  • Glazed, highly radioactive waste is usually filled into stainless steel molds.
  • the packaging is then the mold and the glass block.
  • a particularly advantageous application of the accident protection according to the invention results, however, if e.g. the glass product in the form of balls, rods or the like is filled into a mold or can together with a granulate or powder according to the invention.
  • Such a bearing bush (14) with a tightly closing cover (15) is shown in an exemplary embodiment in longitudinal section in FIG. II.
  • the gradient between the maximum central temperature and the marginal temperature which is steep in the case of glazed highly radioactive waste, is additionally reduced, so that the liner temperature rises and thus a greater temperature difference is available for heat dissipation to the cooling air.
  • spent nuclear fuel elements in which the actual fuel is to be regarded as stored goods and the fuel casing (e.g. cladding tubes for light water reactor fuel elements, graphite matrix for high-temperature reactor elements) is to be regarded as packaging for the stored goods.
  • the fuel casing e.g. cladding tubes for light water reactor fuel elements, graphite matrix for high-temperature reactor elements
  • the accident protection according to the invention also has significant advantages over metal and salt melts. In most cases, without a malfunction caused by cooling interruption, storage goods packaging and bulk material, no connection. After storage, any material that is still loosely attached to the storage goods packaging can be easily and completely removed using simple mechanical cleaning processes.
  • its melting temperature can advantageously be chosen as high as it is for the stored goods in the event of an accident is still allowed. This makes the cases in which a meltdown can actually be expected in the event of a malfunction much less likely.
  • compaction e.g. by applying a vibrator, particularly advantageous.
  • salts or salt mixtures aluminum powder, granules or powder from lead, tin and zinc or their alloys, and possibly also Al-Ni, are furthermore suitable as materials for the bulk material.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Packages (AREA)
  • Processing Of Solid Wastes (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
EP80107972A 1980-02-21 1980-12-17 Protection pour le stockage des matériaux radioactifs autochauffants Withdrawn EP0035064A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803006507 DE3006507A1 (de) 1980-02-21 1980-02-21 Stoerfallschutz fuer die lagerung selbsterhitzender radioaktiver stoffe
DE3006507 1980-02-21

Publications (2)

Publication Number Publication Date
EP0035064A2 true EP0035064A2 (fr) 1981-09-09
EP0035064A3 EP0035064A3 (fr) 1981-12-16

Family

ID=6095204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107972A Withdrawn EP0035064A3 (fr) 1980-02-21 1980-12-17 Protection pour le stockage des matériaux radioactifs autochauffants

Country Status (3)

Country Link
EP (1) EP0035064A3 (fr)
DE (1) DE3006507A1 (fr)
FI (1) FI803939L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786309A1 (fr) * 1998-11-23 2000-05-26 Transnucleaire Dispositif amortisseur de chocs pour conteneurs de matieres radioactives
EP2866231A1 (fr) * 2013-10-25 2015-04-29 GNS Gesellschaft für Nuklear-Service mbH Récipient de transport et/ou de stockage
RU187096U1 (ru) * 2018-09-25 2019-02-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петрозаводский государственный университет" Контейнер для транспортировки и хранения отработавшего ядерного топлива

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH032695A (ja) * 1989-05-31 1991-01-09 Nisshin Steel Co Ltd 高除熱性の放射線しゃへい材

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1376964A (fr) * 1963-11-27 1964-10-31 Lemer & Cie Application nouvelle de certains alliages et composés du plomb, à point de fusion élevé, pour assurer la protection biologique de récipients contenant des produits radioactifs
FR1411473A (fr) * 1964-10-09 1965-09-17 Lemer & Cie Conteneur de transport pour produits radioactifs résistant aux chocs et au feu
DE2313786A1 (de) * 1973-03-20 1974-09-26 Transnuklear Gmbh Transportbehaelter fuer radioaktive ionenaustauscherharze
FR2334177A1 (fr) * 1975-12-01 1977-07-01 Atomic Energy Authority Uk Conteneur de transport de matieres radioactives
DE2824240A1 (de) * 1978-06-02 1979-12-06 Amtrust Ag Verfahren zur handhabung abgebrannter brennelemente, transport- und/oder lagerbehaelter zum transportieren und/oder lagern von brennelementen, sowie in verbindung mit dem verfahren verwendbare wiederaufbereitungsanlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1376964A (fr) * 1963-11-27 1964-10-31 Lemer & Cie Application nouvelle de certains alliages et composés du plomb, à point de fusion élevé, pour assurer la protection biologique de récipients contenant des produits radioactifs
FR1411473A (fr) * 1964-10-09 1965-09-17 Lemer & Cie Conteneur de transport pour produits radioactifs résistant aux chocs et au feu
DE2313786A1 (de) * 1973-03-20 1974-09-26 Transnuklear Gmbh Transportbehaelter fuer radioaktive ionenaustauscherharze
FR2334177A1 (fr) * 1975-12-01 1977-07-01 Atomic Energy Authority Uk Conteneur de transport de matieres radioactives
DE2824240A1 (de) * 1978-06-02 1979-12-06 Amtrust Ag Verfahren zur handhabung abgebrannter brennelemente, transport- und/oder lagerbehaelter zum transportieren und/oder lagern von brennelementen, sowie in verbindung mit dem verfahren verwendbare wiederaufbereitungsanlage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786309A1 (fr) * 1998-11-23 2000-05-26 Transnucleaire Dispositif amortisseur de chocs pour conteneurs de matieres radioactives
EP1005049A1 (fr) * 1998-11-23 2000-05-31 Transnucléaire Dispositif amortisseur de chocs pour conteneurs de matières radioactives
US6234311B1 (en) 1998-11-23 2001-05-22 Transnucleaire Sa Shock-absorbing system for containers of radioactive material
EP2866231A1 (fr) * 2013-10-25 2015-04-29 GNS Gesellschaft für Nuklear-Service mbH Récipient de transport et/ou de stockage
RU187096U1 (ru) * 2018-09-25 2019-02-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петрозаводский государственный университет" Контейнер для транспортировки и хранения отработавшего ядерного топлива

Also Published As

Publication number Publication date
FI803939L (fi) 1981-08-22
EP0035064A3 (fr) 1981-12-16
DE3006507A1 (de) 1981-08-27

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Inventor name: AHNER, STEFAN, ING. GRAD.

Inventor name: SCHMIDT, KONRAD, DR.

Inventor name: WARNECKE, ERNST, DR.