DE2219013A1 - Fuel element with ceramic fuel for high temperature reactor - Google Patents
Fuel element with ceramic fuel for high temperature reactorInfo
- Publication number
- DE2219013A1 DE2219013A1 DE19722219013 DE2219013A DE2219013A1 DE 2219013 A1 DE2219013 A1 DE 2219013A1 DE 19722219013 DE19722219013 DE 19722219013 DE 2219013 A DE2219013 A DE 2219013A DE 2219013 A1 DE2219013 A1 DE 2219013A1
- Authority
- DE
- Germany
- Prior art keywords
- graphite
- tube
- fuel
- high temperature
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Ceramic Products (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung bezieht sich auf ein Hochtemperaturreaktor-Sinterbrennstoffelement in Ring- oder Rohrform, das in einen Graphitbehälter eingeschlossen ist, der aus einem äußeren und einem inneren Graphitrohr besteht.The invention relates to a high temperature reactor sintered fuel element in ring or tube form enclosed in a graphite container made of a outer and an inner graphite tube.
In Hochtemperaturreaktoren benutzt man keramische Brennstoffe wegen ihrer Stabilität gegenüber den hohen Temperaturen und ihrer Korrosionsfestigkeit: Man kann beispielsweise als geeignete und zufriedenstellende Brennstoffe die Verbindungen UO-, UC, TJC2 erwähnen, die entweder allein oder in Verbindung mit anderen Körpern benutzt werden, beispielsweise die Mischung ausCeramic fuels are used in high-temperature reactors because of their stability to high temperatures and their resistance to corrosion: one can, for example, mention the compounds UO-, UC, TJC 2 as suitable and satisfactory fuels, which are used either alone or in conjunction with other bodies, for example the Mix of
3953.3)-Lp-r (7)3953.3) -Lp-r (7)
209852/05715209852/05715
Der Brennstoff ist in einen Behälter eingeschlossen, der vorzugsweise aus Graphit besteht, weil der Graphit Neutronen wenig absorbiert, ein guter Moderator ist und eine gute Widerstandsfähigkeit gegenüber hohen Temperaturen aufweist. The fuel is enclosed in a container, which is preferably made of graphite because the graphite is neutrons poorly absorbed, is a good moderator and has good resistance to high temperatures.
Tn den Hochtemperaturreaktoren bekleidet das eigentliche Brennstoffelement, das ein Sintermaterial darstellt, häufig eine Ring- oder Rohrform, und sein Behälter setzt sich aus einem äußeren und einem inneren Rohr zusammen, die beide durch ein Gas, wie Helium, gekühlt werden, das in Richtung der Achse des Brennstoffelements strömt.In the high-temperature reactors, the actual fuel element, which is a sintered material, is often a ring or tube shape, and its container is composed of an outer and an inner tube, the both are cooled by a gas such as helium flowing in the direction of the axis of the fuel element.
Wegen des für den Zusammenbau notwendigen Spiels zwischen dem eigentlichen Sinterbrennstoffelement und seinen beiden Behälterrohren ist die Berührung zwischen dem Element und diesen Rohren keinesfalls sicher, so daß die Wärmeübertragung zwischen dem eigentlichen Element und den Rohren oft schlecht ist.Because of the play between the actual sintered fuel element and its necessary for assembly two container tubes, the contact between the element and these tubes is by no means certain, so that the heat transfer between the actual element and the pipes is often bad.
Der Erfindung liegt die Aufgabe zugrunde, diesen Nachteil zu beheben und bei Strahlenbelastung die Berührung zwischen dem eigentlichen Brennstoff-Sinterelement und den beiden Rqhren zu verbessern und sicherzustellen.The invention is based on the object of eliminating this disadvantage and, in the case of radiation exposure, the contact between the actual fuel sintered element and the to improve and ensure both pipes.
Ein diese Aufgabe lösendes Hochtemperatür-Sinterbrennstoff element in Ring- oder Rohrform, das in einen Behälter aus Graphit eingeschlossen ist, der aus einem äußeren und einem inneren Rohr besteht, ist im wesentlichen dadurch gekennzeichnet, daß das innere Graphitrohr aus einem Graphitmaterial besteht, das bei Bestrahlung einen kleineren Kon-A high-temperature sintered fuel that solves this task element in the form of a ring or tube, which is enclosed in a container made of graphite, which consists of an outer and an inner tube is essentially characterized in that the inner graphite tube is made of a graphite material there is a smaller con-
20985?/n$7p20985? / N $ 7p
traktionskoeffizienten hat als das Graphitmaterial, aus dem das äußere Rohr besteht.has traction coefficients than the graphite material from which the outer tube is made.
Beispielsweise kann der Graphit des Innenrohres ein Graphit sein, wie er von der Firma PECHINEY unter der Bezeichnung FHAN geliefert wird und der Graphit des Außenrohres ein durch Graphitisation in der Wärme hergestelltes Kunstgraphit sein.For example, the graphite of the inner tube can be a Graphite, as supplied by PECHINEY under the name FHAN, and the graphite of the outer tube one produced by hot graphitization Be art graphite.
Nach einer bevorzugten Ausführungsform der Erfindung gibt man dem äußeren Rohr eine wesentlich größere Wandstärke als dem inneren Rohr. Das äußere Rohr ist nämlich innerhalb seiner Wand einer Zugkraftbeanspruchung unterworfen, während das innere Rohr auf Druck beansprucht wird, und der Widerstand bzw. die Festigkeit des Graphits wesentlich geringer bei Zug- als bei Druckbeanspruchung istoAccording to a preferred embodiment of the invention the outer tube is given a significantly greater wall thickness than the inner tube. The outer tube is namely subjected to tensile stress within its wall, while the inner tube is subjected to compression, and the resistance or the strength of the graphite is significantly lower when subjected to tensile than to compression
209857/0209857/0
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7115372A FR2134260B1 (en) | 1971-04-29 | 1971-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2219013A1 true DE2219013A1 (en) | 1972-12-21 |
Family
ID=9076141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19722219013 Pending DE2219013A1 (en) | 1971-04-29 | 1972-04-19 | Fuel element with ceramic fuel for high temperature reactor |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH550461A (en) |
| DE (1) | DE2219013A1 (en) |
| FR (1) | FR2134260B1 (en) |
| GB (1) | GB1346005A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57166591A (en) * | 1981-04-08 | 1982-10-14 | Hitachi Ltd | Nuclear fuel assembly |
-
1971
- 1971-04-29 FR FR7115372A patent/FR2134260B1/fr not_active Expired
-
1972
- 1972-04-07 CH CH509972A patent/CH550461A/en not_active IP Right Cessation
- 1972-04-19 DE DE19722219013 patent/DE2219013A1/en active Pending
- 1972-04-19 GB GB1810072A patent/GB1346005A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2134260B1 (en) | 1974-03-08 |
| FR2134260A1 (en) | 1972-12-08 |
| CH550461A (en) | 1974-06-14 |
| GB1346005A (en) | 1974-02-06 |
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