DE3323262A1 - Antimony for use in nuclear industry installations - Google Patents
Antimony for use in nuclear industry installationsInfo
- Publication number
- DE3323262A1 DE3323262A1 DE19833323262 DE3323262A DE3323262A1 DE 3323262 A1 DE3323262 A1 DE 3323262A1 DE 19833323262 DE19833323262 DE 19833323262 DE 3323262 A DE3323262 A DE 3323262A DE 3323262 A1 DE3323262 A1 DE 3323262A1
- Authority
- DE
- Germany
- Prior art keywords
- antimony
- nuclear industry
- nuclear
- industry installations
- installations
- 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- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C12/00—Alloys based on antimony or bismuth
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
Antimon zur Verwendung in kerntechnischen AnlagenAntimony for use in nuclear facilities
Die Erfindung betrifft Antimon (Sb) zur Verwendung in kerntechnischen Anlagen, insbesondere als Lager- oder Dichtungsmaterial für eine Pumpe im Kühlmittelkreis eines Kernreaktors.The invention relates to antimony (Sb) for use in nuclear engineering Systems, in particular as storage or sealing material for a pump in the coolant circuit of a nuclear reactor.
Antimon wird zwar üblicherweise als Mischungsbestandteil eingesetzt und somit nur zusammen mit z.B. anderen Metallen, wie Blei oder Zinn, vor allem aber mit Kohlenstoff verarbeitet, um Schalen für Gleitlager oder Dichtungsringe an Wellen mit gleitender BerUhrung usw.Antimony is usually used as a component of the mixture and therefore only together with e.g. other metals, such as lead or tin, above all but processed with carbon to make shells for plain bearings or sealing rings on shafts with sliding contact, etc.
herzustellen. Trotz seines relativ geringen Mengenanteils können jedoch dadurch Schwierigkeiten entstehen, daß das Antimonisotop Sb123 im Neutronenfeld das Nuklid Sb124 bildet, das mit einer Halbwertszeit von 60 Tagen die Dosisleistung des Personals bei Wartungsarbeiten stark erhöhen kann.to manufacture. Despite its relatively small proportion, however, difficulties arise because the antimony isotope Sb123 in the neutron field the nuclide Sb124 forms the dose rate with a half-life of 60 days of personnel during maintenance work can increase significantly.
Aufgabe der Erfindung ist es, die vorgenannte Strahlenbelastung zu verringern. Dies gelingt erfindungsgemäß durch einen Anteil von Antimon 121 von mindestens 90%.The object of the invention is to reduce the aforementioned radiation exposure to decrease. This is achieved according to the invention by a proportion of antimony 121 of at least 90%.
Die erfindungsgemäße Verwendung des einen Isotopenanteils bedeutet gegenüber dem natürlichen Isotopenverhältnis von 57,3 : 42,7 (Sb121 : Sb123) eine Verschiebung um mehr als 30%. Sie verringert die Aktivität, die durch Antimon 124 bedingt ist, ganz erheblich. Zum Beispiel kann bei einem Isotopenverhältnis von 95,7 4,3 die Aktivität auf 10% des bisherigen Inventars reduziert werden. Deshalb wirkt sich die Erfindung besonders vorteilhaft aus, wenn Antimon mit einem Gehalt von mehr als 95% Antimon 121 in Form von mit Antimon gebundener Kohle angewendet wird. Man erhält damit ein bis 3000C temperaturbeständiges Lager- oder Dichtungsmaterial, das bei einer Kühlmittelpumpe eines Leichtwasserreaktors selbstschmierend wirkt und dennoch auch bei einem Abrieb, der sich im einjährigen Dauerbetrieb einstellt, zu noch tolerierbaren Strahlenbelastungen führt.The use according to the invention of the one isotope component means compared to the natural isotope ratio of 57.3: 42.7 (Sb121: Sb123) one Shift by more than 30%. It reduces the activity caused by antimony 124 is conditional, quite considerable. For example, with an isotope ratio of 95.7 4.3 the activity can be reduced to 10% of the previous inventory. That's why affects the invention especially beneficial when antimony with a content of more than 95% antimony 121 in the form of antimony bound Coal is applied. This gives a storage system that is temperature-resistant up to 3000C or sealing material used in a coolant pump of a light water reactor Has a self-lubricating effect and yet also with abrasion that occurs over a year Sets continuous operation, leads to radiation exposure that is still tolerable.
Die Verringerung an unerwünschtem Antimon 124 ist um so größer, je höher der Isotopenanteil an Antimon 121 gewählt wird. Eine für die technische Praxis derzeit geltende Obergrenze ist bei einer Isotopenkonzentration von 99,57% gegeben, weil metallisches Antimon bis zu dieser Isotopenkonzentration an Sb121 im Handel erhältlich ist.The reduction in undesired antimony 124 is greater, the greater the higher the isotope content of antimony 121 is chosen. One for technical practice The current upper limit is given at an isotope concentration of 99.57%, because metallic antimony up to this isotope concentration of Sb121 is commercially available is available.
2 Patentansprüche O Figuren2 claims O figures
Claims (2)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833323262 DE3323262A1 (en) | 1983-06-28 | 1983-06-28 | Antimony for use in nuclear industry installations |
| JP13282784A JPS6036650A (en) | 1983-06-28 | 1984-06-27 | Antimony for atomic power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833323262 DE3323262A1 (en) | 1983-06-28 | 1983-06-28 | Antimony for use in nuclear industry installations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3323262A1 true DE3323262A1 (en) | 1985-01-03 |
Family
ID=6202594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19833323262 Withdrawn DE3323262A1 (en) | 1983-06-28 | 1983-06-28 | Antimony for use in nuclear industry installations |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6036650A (en) |
| DE (1) | DE3323262A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0683042B2 (en) * | 1986-03-31 | 1994-10-19 | 株式会社東芝 | Output driver circuit |
| JP2826322B2 (en) * | 1988-07-25 | 1998-11-18 | 富士通株式会社 | Semiconductor device |
-
1983
- 1983-06-28 DE DE19833323262 patent/DE3323262A1/en not_active Withdrawn
-
1984
- 1984-06-27 JP JP13282784A patent/JPS6036650A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6036650A (en) | 1985-02-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8127 | New person/name/address of the applicant |
Owner name: SIEMENS AG, 1000 BERLIN UND 8000 MUENCHEN, DE |
|
| 8110 | Request for examination paragraph 44 | ||
| 8125 | Change of the main classification |
Ipc: G21C 15/00 |
|
| 8139 | Disposal/non-payment of the annual fee |