DE1242300B - Uranium carbide based nuclear reactor fuel element - Google Patents
Uranium carbide based nuclear reactor fuel elementInfo
- Publication number
- DE1242300B DE1242300B DEC29251A DEC0029251A DE1242300B DE 1242300 B DE1242300 B DE 1242300B DE C29251 A DEC29251 A DE C29251A DE C0029251 A DEC0029251 A DE C0029251A DE 1242300 B DE1242300 B DE 1242300B
- Authority
- DE
- Germany
- Prior art keywords
- fuel
- uranium
- shell
- carbide
- fuel element
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/02—Fuel elements
- G21C3/28—Fuel elements with fissile or breeder material in solid form within a non-active casing
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/02—Fuel elements
- G21C3/04—Constructional details
- G21C3/06—Casings; Jackets
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/02—Fuel elements
- G21C3/04—Constructional details
- G21C3/06—Casings; Jackets
- G21C3/07—Casings; Jackets characterised by their material, e.g. alloys
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/02—Fuel elements
- G21C3/04—Constructional details
- G21C3/16—Details of the construction within the casing
- G21C3/20—Details of the construction within the casing with coating on fuel or on inside of casing; with non-active interlayer between casing and active material with multiple casings or multiple active layers
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/38—Fuel units consisting of a single fuel element in a supporting sleeve or in another supporting element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Description
DEUTSCHES IM PATENTAMTGERMAN IN THE PATENT OFFICE
AUSLEGESCHRIFTEDITORIAL
DeutscheKl.: 21g-21/20German class: 21g-21/20
Nummer: 1242 300Number: 1242 300
Aktenzeichen: C 29251 Vni c/21 gFile number: C 29251 Vni c / 21 g
J 242 300 Anmeldetag: 26.Februar 1963J 242 300 Filing date: February 26, 1963
Auslegetag: 15. Juni 1967Open date: June 15, 1967
Die Erfindung bezieht sich auf ein Kernreaktor-Brennstoffelement mit einem Brennstoffkern auf Urancarbidbasis und mit einer Hülle aus einer Eisenlegierung. The invention relates to a nuclear reactor fuel element having a fuel core Uranium carbide base and coated with an iron alloy.
Die Brennstoffelemente sind insbesondere für Kernreaktoren mit Graphit, schwerem Wasser oder einer organischen Flüssigkeit als Moderator bestimmt, die durch Kohlendioxyd oder eine organische Flüssigkeit gekühlt werden.The fuel elements are especially for nuclear reactors with graphite, heavy water or a organic liquid determined as a moderator by carbon dioxide or an organic liquid be cooled.
Aufgabe der Erfindung ist vor allem die Schaffung solcher Brennstoffelemente, mit denen hohe Temperaturen und besonders große Leistungen erreicht werden können und demzufolge eine beträchtliche Erniedrigung des Preises der erzeugten Energie bei einem Reaktor von gegebener Dimension und gegebenen Kosten ermöglicht wird.The main object of the invention is to create such fuel elements with which high temperatures and particularly great achievements can be achieved and consequently a considerable one Lowering the price of the energy produced in a reactor of a given size and size Cost is made possible.
Als Kernbrennstoff für Hochtemperaturreaktoren wird Urancarbid wegen seiner relativ guten Wärmeleitfähigkeit und Temperaturbeständigkeit empfohlen. Schwierigkeiten bestehen bei der Wahl des Hüllenmaterials, das bei erhöhter Temperatur mechanisch vor allem möglichst stabil und oxydationsbeständig sein und außerdem einen möglichst geringen Neutronenabsorptionsquerschnitt haben soll. Üblicherweise werden nichtrostende Stähle empfohlen.Uranium carbide is used as a nuclear fuel for high-temperature reactors because of its relatively good thermal conductivity and temperature resistance recommended. Difficulties exist in the choice of the casing material, and above all, mechanically as stable and oxidation-resistant as possible at elevated temperatures and should also have the smallest possible neutron absorption cross-section. Usually stainless steels are recommended.
Gemäß der Erfindung wird nun eine wesentliche Verbesserung der Brennstoffelemente dadurch erreicht, daß Urancarbidelemente vorgesehen werden, die von einer sehr dünnen Hülle umgeben sind, die aus einer 13 bis 40 Gewichtsprozent Aluminium und gegebenenfalls Zusätze an Beryllium oder Silicium enthaltenden Eisen-Aluminium-Legierung besteht. Vorzugsweise besteht der Brennstoff dieser Elemente aus Uranmonocarbid und/oder Urancarbid, und er kann gegebenenfalls geringe Mengen an Zusätzen verschiedener Stoffe, wie z. B. Zirkonium oder Zirkoniumcarbid, enthalten.According to the invention, a substantial improvement in the fuel elements is now achieved by that uranium carbide elements are provided, which are surrounded by a very thin shell, the from a 13 to 40 weight percent aluminum and optionally additions of beryllium or silicon containing iron-aluminum alloy. Preferably the fuel consists of these elements made of uranium monocarbide and / or uranium carbide, and it can optionally contain small amounts of additives various substances, such as B. zirconium or zirconium carbide.
Der relativ hohe Aluminiumgehalt des Hüllenmaterials führt zu einer deutlichen Verringerung des Gesamtneutroneneinfangquerschnittes der Hülle, die zudem besonders dünn sein kann, da das mechanische Verhalten der gewählten Eisenlegierung mit hohem Al-Gehalt — und auch die Oxydationsbeständigkeit — bei erhöhten Temperaturen erstaunlich günstig sind.The relatively high aluminum content of the shell material leads to a significant reduction in the Total neutron capture cross-section of the shell, which can also be particularly thin because the mechanical Behavior of the chosen iron alloy with a high Al content - and also the resistance to oxidation - are surprisingly cheap at elevated temperatures.
Durch Verwendung von Urancarbid als Brennstoff zusammen mit dem neuen Hüllenmaterial kann man
daher eine erhöhte spezifische Leistung pro Längeneinheit des Elementes erreichen, und auf Grund der
möglichen Erhöhung der Reaktorbetriebstemperatur kann der Energiepreis gesenkt werden. Die üblicherweise
empfohlenen nichtrostenden Stähle, die bedeu-Kernreaktor-Brennstoffelement auf
UrancarbidbasisBy using uranium carbide as fuel together with the new shell material, an increased specific power per unit length of the element can therefore be achieved, and the energy price can be reduced due to the possible increase in the reactor operating temperature. The commonly recommended stainless steels that mean nuclear reactor fuel element
Uranium carbide base
Anmelder:Applicant:
Commissariat ä l'Energie Atomique, Paris
Vertreter:Commissariat a l'Energie Atomique, Paris
Representative:
Dipl.-Ing. R. Beetz und Dipl.-Ing. K. Lamprecht, Patentanwälte, München 22, Steinsdorfstr. 10Dipl.-Ing. R. Beetz and Dipl.-Ing. K. Lamprecht, Patent Attorneys, Munich 22, Steinsdorfstr. 10
Als Erfinder benannt:Named as inventor:
Maurice Gauthron, Paris;Maurice Gauthron, Paris;
Marc Salesse, Gif-sur-Yvette, Seine-et-Oise;Marc Salesse, Gif-sur-Yvette, Seine-et-Oise;
Jacques Andre Stohr,Jacques Andre Stohr,
Bures-sur-Yvette, Seine-et-Oise (Frankreich)Bures-sur-Yvette, Seine-et-Oise (France)
Beanspruchte Priorität:Claimed priority:
Frankreich vom 2. März 1962 (889 736)France of March 2, 1962 (889 736)
tende Mengen an Chrom und/oder Nickel enthalten, haben einen höheren Neutronenabsorptionsquerschnitt, und sie sind außerdem dem neuen Hüllenmaterial hinsichtlich der Oxydationsbeständigkeit und der Wärmeelastizitätsgrenze unterlegen, so daß auch mit Edelstahl plattierte Zirkonrohre, wie sie für die Verwendung bei Temperaturen oberhalb von 350° C in korrodierenden Kühlmitteln vorgeschlagen wurden, in der Gesamtheit der Eigenschaften nicht an das neue Hüllenmaterial heranreichen.contain large amounts of chromium and / or nickel, have a higher neutron absorption cross-section, and they are also the new shell material in terms of resistance to oxidation and inferior to the thermal elastic limit, so that zirconium tubes clad with stainless steel, such as those for the Use at temperatures above 350 ° C in corrosive coolants have been suggested, do not come close to the new shell material in the totality of the properties.
DieAluminiumgehalte bekannter Eisenlegierungen sind im allgemeinen relativ gering und auf einige Prozent begrenzt, wodurch keine nennenswerte Erniedrigung des Gesamt-Neutronenabsorptionsquerschnitts erreicht werden kann. Eine Ausnahme macht eine Legierung, die 10% Chrom, 20% Aluminium, Rest Eisen enthält; diese Legierung hat zwar eine ausgezeichnete Oxydationsbeständigkeit bei erhöhten Temperaturen, aber sie soll mechanisch so ungünstige Eigenschaften haben, daß sie lediglich als Überzug für weniger korrosionsbeständige Materialien angewendet werden kann. Diese Überzugs- und Plattierungsverfahren bringen jedoch jeweils zusätzliche Schwierigkeiten mit sich.The aluminum contents of known iron alloys are generally relatively low and to some extent Percent, which means that there is no significant reduction in the total neutron absorption cross-section can be reached. An exception is made for an alloy that contains 10% chromium, 20% aluminum, The remainder contains iron; this alloy has an excellent resistance to oxidation at increased Temperatures, but they should have mechanically unfavorable properties that they can only be used as a coating can be used for less corrosion-resistant materials. These coating and plating processes however, each bring additional difficulties.
Zur Erläuterung der Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnungen ein Brennelement gemäß der Erfindung beschrieben; es zeigtTo explain the invention, a fuel assembly is described below with reference to the drawings described according to the invention; it shows
F i g. 1 ein erfindungsgemäß ausgebildetes Brennstoffelement im Schnitt längs a-a der F i g. 2,F i g. 1 shows a fuel element designed according to the invention in section along aa of FIG . 2,
709 590/231709 590/231
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR889736A FR1323725A (en) | 1962-03-02 | 1962-03-02 | Improvements to fuel elements |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1242300B true DE1242300B (en) | 1967-06-15 |
Family
ID=8773860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC29251A Pending DE1242300B (en) | 1962-03-02 | 1963-02-26 | Uranium carbide based nuclear reactor fuel element |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE628975A (en) |
DE (1) | DE1242300B (en) |
FR (1) | FR1323725A (en) |
GB (1) | GB970687A (en) |
LU (1) | LU43245A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8202629B2 (en) | 2005-06-29 | 2012-06-19 | Forschungszentrum Karlsruhe Gmbh | Cladding tubes made of ferritic/martensitic or austenitic steel for nuclear fuel elements/fuels and method for subsequently treating a FeCrA protective layer thereon that is suited for high temperatures |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5626248A (en) * | 1995-04-17 | 1997-05-06 | Talus Corporation | Therapeutic hand-held drinking apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE571786A (en) * | 1957-10-16 | |||
DE1037606B (en) * | 1957-08-29 | 1958-08-28 | Degussa | Clad sleeve for nuclear reactor fuel elements |
-
0
- BE BE628975D patent/BE628975A/xx unknown
-
1962
- 1962-03-02 FR FR889736A patent/FR1323725A/en not_active Expired
-
1963
- 1963-02-22 LU LU43245D patent/LU43245A1/xx unknown
- 1963-02-26 DE DEC29251A patent/DE1242300B/en active Pending
- 1963-02-28 GB GB8072/63A patent/GB970687A/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1037606B (en) * | 1957-08-29 | 1958-08-28 | Degussa | Clad sleeve for nuclear reactor fuel elements |
BE571786A (en) * | 1957-10-16 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8202629B2 (en) | 2005-06-29 | 2012-06-19 | Forschungszentrum Karlsruhe Gmbh | Cladding tubes made of ferritic/martensitic or austenitic steel for nuclear fuel elements/fuels and method for subsequently treating a FeCrA protective layer thereon that is suited for high temperatures |
Also Published As
Publication number | Publication date |
---|---|
LU43245A1 (en) | 1963-04-22 |
FR1323725A (en) | 1963-04-12 |
GB970687A (en) | 1964-09-23 |
BE628975A (en) |
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