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DE1292261B - Tubular container for nuclear fuel - Google Patents

Tubular container for nuclear fuel

Info

Publication number
DE1292261B
DE1292261B DEP19107A DEP0019107A DE1292261B DE 1292261 B DE1292261 B DE 1292261B DE P19107 A DEP19107 A DE P19107A DE P0019107 A DEP0019107 A DE P0019107A DE 1292261 B DE1292261 B DE 1292261B
Authority
DE
Germany
Prior art keywords
fuel
ribs
container
longitudinal ribs
coiled
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
Application number
DEP19107A
Other languages
German (de)
Inventor
Ritz Heinrich Hugo Ludolf
Elliott Edward Rae
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.)
CA Parsons and Co Ltd
Original Assignee
CA Parsons and Co Ltd
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 CA Parsons and Co Ltd filed Critical CA Parsons and Co Ltd
Publication of DE1292261B publication Critical patent/DE1292261B/en
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/356—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms
    • D06M15/3566—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of other unsaturated compounds containing nitrogen, sulfur, silicon or phosphorus atoms containing sulfur
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D06M15/273—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof of unsaturated carboxylic esters having epoxy groups
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
    • D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • 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
    • G21C3/08—Casings; Jackets provided with external means to promote heat-transfer, e.g. fins, baffles
    • 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
    • G21C3/12—Means forming part of the element for locating it within the reactor core
    • 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

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Geometry (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Vibration Dampers (AREA)

Description

Das Hauptpatent schützt einen rohrförmigen Behälter für Kernbrennstoff, der zusammen mit dem Behälter ein in die Brennstoffkanäle eines Reaktorcores einsetzbares Brennstoffelement bildet und .an dessen äußerer Oberfläche in Richtung der Behälterachse sich erstreckende Längsrippen und zusätzlich gewendelte Rippen vorgesehen sind, wobei die Längsrippen in radialer Richtung gesehen über die gewendelten Rippen hinausragen.The main patent protects a tubular container for nuclear fuel, which together with the Container forms a fuel element that can be inserted into the fuel channels of a reactor core and .an its outer surface in the direction of the container axis extending longitudinal ribs and additionally Coiled ribs are provided, the longitudinal ribs seen in the radial direction over the coiled ones Ribs protrude.

Hierdurch werden die Nachteile, die bekannten ao Verrippungen an Brennstoffelementen anhaften, insbesondere bezüglich eines großen Druckabfalles des die Verrippung bestreichenden Kühlmittels sowie der ungleichmäßigen Erwärmung desselben und einer ungleichmäßigen Strömungsgeschwindigkeit, vermieden und eine weitere Verbesserung des Wärmeüberganges und des Umlaufes des_ Kühlmittels erreicht. This eliminates the disadvantages, the known ao Adhere to ribs on fuel elements, especially with regard to a large pressure drop of the the ribbing coating coolant as well as the uneven heating of the same and an uneven Flow velocity, avoided and a further improvement of the heat transfer and the circulation of the coolant achieved.

Die im Hauptpatent" und in der vorliegenden Zusatzanmeldung behandelten Behälter für Kernbrennstoffe werden in Kanälen angeordnet, die in Neutronen moderierendem Material des Kernreaktors eingeformt sind. Über die mit Rippen versehene Oberfläche der Behälter wird in einem Zwischenraum zwischen dem Behälter und den Wänden des moderierenden Materials ein Kühlmittel in Umlauf gehalten.The ones in the main patent "and in the present Additional application-treated containers for nuclear fuel are placed in channels leading into Neutron moderating material of the nuclear reactor are molded. About the ribbed The surface of the container is in a space between the container and the walls of the moderating material kept a coolant in circulation.

Wenn solche Brennstoffbehälter Belastungen ausgesetzt werden, indem man sie beispielsweise in den Brennstoffkanälen eines Reaktorcores übereinanderstapelt, so neigen sie dazu, unter den im Reaktorcore auftretenden Temperaturen und Strahlungseinwirkungen sich-zu-verbiegen-oder einzuknicken.If such fuel containers are exposed to loads, for example by being placed in the Fuel channels of a reactor core are stacked on top of one another, so they tend to be below the ones in the reactor core occurring temperatures and radiation effects bend-to-bend or buckle.

Der vorliegenden Erfindung liegt, daher die Aufgabe zugrunde, ein solches Biegen oder Knicken der Brennstoffelemente unter den im Inneren des Reaktorcores herrschenden Betriebsbedingungen mit Sicherheit zu verhindern.The present invention is therefore based on the object of such a bending or buckling of the Fuel elements under the operating conditions prevailing inside the reactor core Prevent security.

Demnach betrifft die vorliegende Erfindung einen rohrförmigen Behälter für Kernbrennstoff, der zusammen mit dem Behälter ein in die Brennstoffkanäle eines Reaktorcores einsetzbares Brennstoffelement bildet und an dessen äußerer Oberfläche in Richtung der Behälterachse sich erstreckende Längsrippen und zusätzlich gewendelte Rippen vorgesehen sind, wobei die Längsrippen in radialer Richtung gesehen über die gewendelten Rippen hinausragen, nach Patent 1200 449. Erfindungsgemäß ist das Spiel zwischen den radial äußeren Kanten der Längsrippen und der Wandung der Brennstoffkanäle zum Zeitpunkt des Einsetzens der Brennstoffelemente so bemessen, daß es durch die bei Betriebstemperatur auftretende radiale Ausdehnung der Längsrippen verschwindet, Hierdurch kommen die Längsrippen im Betrieb zur Anlage an den Wandungen der Brennstoffkanäle und verhindern so ein Verbiegen oder Knicken der Behälter.Accordingly, the present invention relates to a tubular container for nuclear fuel, which together forms with the container a fuel element that can be inserted into the fuel channels of a reactor core and on its outer surface in Longitudinal ribs extending in the direction of the container axis and additionally coiled ribs are provided are, with the longitudinal ribs protruding beyond the coiled ribs seen in the radial direction, according to patent 1200 449. According to the invention, the play between the radially outer edges of the longitudinal ribs and the wall of the fuel channels at the time the fuel elements are inserted dimensioned so that it disappears due to the radial expansion of the longitudinal ribs occurring at operating temperature, As a result, the longitudinal ribs come to rest on the walls of the fuel channels during operation and thus prevent the container from bending or kinking.

Die Erfindung ist im folgenden an Hand eines Beispieles unter Bezugnahme auf die Zeichnung näher erläutert. Es stellt darThe invention is described below on the basis of an example with reference to the drawing explained in more detail. It shows

F i g. 1 ein typisches in einen Brennstoffkanal eines Kernreaktors eingesetztes Brennstoffelement nach der Erfindung im Vertikalschnitt,F i g. 1 a typical one in a fuel channel Nuclear reactor used fuel element according to the invention in vertical section,

Fig. 2 einen Horizontalschnitt durch den Gegenstand der Fig. 1 längs der SohnitÜime'A-A. Fig. 2 shows a horizontal section through the object of Fig. 1 along the SohnitÜime'AA.

In F i g. 1 ist ein Rohrelement gezeigt, das aus einem zylindrischen Behälter 1 f ür den Kernbrennstoff besteht, dessen Oberfläche mit Rippen versehen ist. Die Rippen 2 sind schraubenförmig um die Mittelachse des Behälters gewendelt. Eine Anzahl von durchgehenden oder unterteilten Längsrippen 3 sind mit dem Behälter verbunden und radial in gleichem Abstand rund um den Umfang des Behälters herum angeordnet.In Fig. 1 shows a tubular element which consists of a cylindrical container 1 for the nuclear fuel consists, the surface of which is provided with ribs. The ribs 2 are helical around the central axis of the container coiled. A number of continuous or divided longitudinal ribs 3 are connected to the container and equidistant radially around the circumference of the container arranged.

Diese Längsrippen 3 wirken als Staubleche in den zwischen den gewendelten Rippen 2 geformten Kanälen und unterbrechen die Strömung des Kühlmittels zwischen den Rippen an diesen Stellen.These longitudinal ribs 3 act as baffles in those formed between the coiled ribs 2 Channels and interrupt the flow of coolant between the ribs at these points.

Die Brennstoffelemente sind normalerweise in Brennstoffkanäle eingesetzt, die im moderierenden Material des Reaktors vorgesehen sind, und sie haben einen geringeren Durchmesser als die Kanäle, um den Durchtritt des Kühlmittels zu erlauben.The fuel elements are normally used in fuel channels that are used in moderating Material of the reactor are provided, and they have a smaller diameter than the channels to allow the coolant to pass through.

Das erfindungsgemäße Brennstoffelement ist so dimensioniert, daß zum Zeitpunkt des Einsetzens in einen Brennstoffkanal im ivlöderator ein Spiel von etwa 1,5 bis 3,5 mm zwischen den Kanten der Längsrippen 3 und der Wandung 4 des Brennstoffkanals vorhanden ist. Dieses Spiel verschwindet, wenn der Reaktor in Betrieb ist und die Temperatur steigt, mit dem Resultat, daß die Staubleche die Wände des Brennstoffkanals berühren. »The fuel element according to the invention is dimensioned so that at the time of insertion in a fuel channel in the ivlöderator a game of about 1.5 to 3.5 mm between the edges of the longitudinal ribs 3 and the wall 4 of the fuel channel is available. This play disappears when the reactor is in operation and the temperature rises with the result that the baffles touch the walls of the fuel channel. »

Die Längsrippen 3 erstrecken sich über die'ganze Länge des Brennstoffelementes 1 und radial über die Außenkante der gewendelten Rippen 2 hinaus, und zwar so weit, daß sie, wenn sie sich während des Betriebes im Reaktor befinden, die Wandung 4 des Brennstoffkanals berühren.The longitudinal ribs 3 extend over the entire length of the fuel element 1 and radially over the Outer edge of the coiled ribs 2 out, and so far that, if they are during the Operation are in the reactor, touch the wall 4 of the fuel channel.

Die Längsrippen 3 sind genügend stark ausgeführt, um jeder Biegungs- oder Knickneigung des Behälters entgegenzuwirken. ':.The longitudinal ribs 3 are made strong enough to withstand any tendency to bend or kink the container to counteract. ':.

Die Strömung des Kühlmittels ist dieselbe, wie im Hauptpatent beschrieben; sie wird durch die Anordnung nach der Erfindung nicht beeinflußt.The flow of the coolant is the same as described in the main patent; it is made by the arrangement according to the invention not affected.

Claims (1)

Patentanspruch:Claim: Rohrförmiger Behälter für Kernbrennstoff, der zusammen mit dem Behälter ein in die Brennstoffkanäle eines Reaktorcores einsetzbares Brennstoffelement bildet und an dessen äußerer Oberfläche in Richtung der Behälterachse sich erstreckende Längsrippen und zusätzlich gewendelte Rippen vorgesehen sind, wobei die Längsrippen, in radialer Richtung gesehen, über die gewendelten Rippen hinausragen, nach Patent 1200 449, dadurch gekennzeichnet, daß das Spiel zwischen den radial äußeren Kanten dei Längsrippen (3) und der Wandung (4) der Brennstoffkanäle zum Zeitpunkt des Einsetzens dei Brennstoffelemente so bemessen ist, daß es durch die bei Betriebstemperatur auftretende radiale Ausdehnung der Längsrippen (3) verschwindet,Tubular container for nuclear fuel which, together with the container, enters the fuel channels a reactor core usable fuel element forms and on its outer surface Longitudinal ribs extending in the direction of the container axis and additionally coiled Ribs are provided, the longitudinal ribs, viewed in the radial direction, over the coiled ones Ribs protrude, according to patent 1200 449, characterized in that the play between the radially outer edges is dei Longitudinal ribs (3) and the wall (4) of the fuel channels at the time of insertion Fuel elements is dimensioned so that it is through the radial occurring at operating temperature Expansion of the longitudinal ribs (3) disappears,
DEP19107A 1956-08-13 1957-08-12 Tubular container for nuclear fuel Pending DE1292261B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24726/56A GB866049A (en) 1956-08-13 1956-08-13 Improvements in and relating to nuclear reactors and fuel elements therefor

Publications (1)

Publication Number Publication Date
DE1292261B true DE1292261B (en) 1969-04-10

Family

ID=10216287

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP19107A Pending DE1292261B (en) 1956-08-13 1957-08-12 Tubular container for nuclear fuel

Country Status (4)

Country Link
DE (1) DE1292261B (en)
FR (2) FR1181132A (en)
GB (1) GB866049A (en)
NL (1) NL105285C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1078496A (en) * 1962-12-31 1967-08-09 Chemical Investors Sa Bonded fibrous substrates and processes
GB2168192B (en) * 1984-12-07 1989-08-31 Atomic Energy Authority Uk Gas cooled nuclear reactors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE409617C (en) * 1925-02-07 Bedrich Frantisek Pochobradsky Internal combustion engine
US1640317A (en) * 1927-03-04 1927-08-23 Clarence H Haas Steam boiler
AT185826B (en) * 1953-09-18 1956-06-11 Waagner Biro Ag Heat exchanger
DE1200449B (en) * 1955-11-16 1965-09-09 Parsons C A & Co Ltd Tubular container for nuclear fuel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE409617C (en) * 1925-02-07 Bedrich Frantisek Pochobradsky Internal combustion engine
US1640317A (en) * 1927-03-04 1927-08-23 Clarence H Haas Steam boiler
AT185826B (en) * 1953-09-18 1956-06-11 Waagner Biro Ag Heat exchanger
DE1200449B (en) * 1955-11-16 1965-09-09 Parsons C A & Co Ltd Tubular container for nuclear fuel

Also Published As

Publication number Publication date
NL105285C (en) 1963-07-15
FR1181172A (en) 1959-06-12
FR1181132A (en) 1959-06-11
GB866049A (en) 1961-04-26

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