EP0041452B1 - Dispositif de réduction des contraintes thermiques sur un échangeur de chaleur - Google Patents

Dispositif de réduction des contraintes thermiques sur un échangeur de chaleur Download PDF

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Publication number
EP0041452B1
EP0041452B1 EP81400863A EP81400863A EP0041452B1 EP 0041452 B1 EP0041452 B1 EP 0041452B1 EP 81400863 A EP81400863 A EP 81400863A EP 81400863 A EP81400863 A EP 81400863A EP 0041452 B1 EP0041452 B1 EP 0041452B1
Authority
EP
European Patent Office
Prior art keywords
alkali metal
conduit
heated
jacket
conduits
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.)
Expired
Application number
EP81400863A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0041452A2 (fr
EP0041452A3 (en
Inventor
Pierre Pouderoux
Jean-Pierre Peyrelongue
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.)
Stein Industrie SA
Original Assignee
Stein Industrie SA
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 Stein Industrie SA filed Critical Stein Industrie SA
Publication of EP0041452A2 publication Critical patent/EP0041452A2/fr
Publication of EP0041452A3 publication Critical patent/EP0041452A3/fr
Application granted granted Critical
Publication of EP0041452B1 publication Critical patent/EP0041452B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0206—Heat exchangers immersed in a large body of liquid
    • F28D1/0213—Heat exchangers immersed in a large body of liquid for heating or cooling a liquid in a tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0054—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for nuclear applications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements

Definitions

  • the present invention relates to a device for reducing thermal stresses on a heat exchanger between two circuits of liquid alkali metal circulating against the current, comprising an annular cylindrical tubular bundle surrounding an axial conduit for introducing the liquid alkali metal to be heated, and extended by an annular duct for evacuating the heated liquid alkali metal.
  • the object of the present invention is to reduce these stresses to a level which is sufficiently low to no longer present a danger for the holding of the exchanger.
  • the device according to the invention is characterized in that it comprises means for radially homogenizing the temperature of the alkali metal, comprising conduits taking a part of the relatively warmer alkali metal around the periphery of its flow and bringing it into the zone of its flow closer to the axis.
  • the Applicant has in fact found that the thermal stresses observed were due to a temperature heterogeneity of the heated liquid alkali metal, generally leaving the tubular plate terminating the exchange tubular bundle, the temperature of this alkali metal increasing radially from the zone 1 closest to the conduit for introducing the alkali metal to be heated to the outermost area.
  • Such a phenomenon negligible with the more common heat exchange fluids such as water or water vapor, becomes much more important with liquid alkali metals, and only the device of the invention allows remediate.
  • the exchanger is immersed in a bath 1 of primary sodium heated up in contact with the fast neutron nuclear reactor, below the protective slab 2.
  • a vertical axial duct 3 is used for the introduction of the secondary sodium to reheat.
  • This conduit opens into a lower chamber 5 below the annular tubular bundle 6, starting from a tubular plate 7. At the other end, the bundle opens onto the tubular plate 8. Openings 9 inlet and 10 outlet allow the circulation of primary sodium around the tubes and against the flow of secondary sodium.
  • the reheated secondary sodium is evacuated via the vertical annular duct 11 around the casing 4 towards the outlet pipe 12.
  • the temperature homogenization device consisting of a series of inclined tubes 14, regularly distributed angularly (for example 12 tubes at 30 ° from each other) starting from the periphery of the conduit 11 in the vicinity of the tubular plate 8 and opening near the envelope 4 in an envelope 15 coaxial with the envelope 4, and keeping the hotter sodium coming from the periphery in contact with the envelope 4 of colder sodium on a certain height.
  • the sodium thus cooled returns to the annular conduit 11 via outlet pipes 17.
  • the relatively cold sodium coming from the tubes of the tube bundle closest to the conduit for introducing cold secondary sodium is separated from the envelope 4 by the wall 16 .
  • FIG. 3 represents the expansion bellows intended to absorb the residual thermal stresses which could remain between the shell 18 of the evacuation duct of the heated secondary sodium and the casing 4.
  • the bellows 19 is welded at the end by means of a circular segment 20 at 21 to the double envelope 4. It is integral at its upper end with a crown 22 welded at the head of the ferrule 18, above the evacuation pipe 12.
  • conduits taking off around the periphery of the hotter liquid alkali metal to bring it in the vicinity of the conduit for introducing the alkali metal to be heated could be replaced by conduits taking alkali metal in the vicinity of this conduit and bringing it back to the periphery, completed by a cylindrical envelope keeping the alkali metal cooler in the vicinity of the outer shell over a certain height.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP81400863A 1980-06-02 1981-05-27 Dispositif de réduction des contraintes thermiques sur un échangeur de chaleur Expired EP0041452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8012189 1980-06-02
FR8012189A FR2483592A1 (fr) 1980-06-02 1980-06-02 Dispositif de reduction des contraintes thermiques sur un echangeur de chaleur

Publications (3)

Publication Number Publication Date
EP0041452A2 EP0041452A2 (fr) 1981-12-09
EP0041452A3 EP0041452A3 (en) 1981-12-16
EP0041452B1 true EP0041452B1 (fr) 1983-08-03

Family

ID=9242589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400863A Expired EP0041452B1 (fr) 1980-06-02 1981-05-27 Dispositif de réduction des contraintes thermiques sur un échangeur de chaleur

Country Status (6)

Country Link
US (1) US4423770A (es)
EP (1) EP0041452B1 (es)
JP (1) JPS57120096A (es)
DE (1) DE3160726D1 (es)
ES (1) ES8204534A1 (es)
FR (1) FR2483592A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535836A1 (fr) * 1982-11-05 1984-05-11 Novatome Echangeur de chaleur pour fluides a temperature elevee dont l'un des fluides entre et sort par la partie superieure de l'echangeur
FR2548345B1 (fr) * 1983-07-01 1985-10-18 Commissariat Energie Atomique Echangeur de chaleur c
DE3419995A1 (de) * 1984-05-29 1985-12-05 Hoechst Ag, 6230 Frankfurt Gentechnologisches verfahren zur herstellung von human-interleukin-2 und mittel zur durchfuehrung dieses verfahrens
CN101174482B (zh) * 2007-12-11 2010-12-22 中国原子能科学研究院 钠-空气热交换器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA965407A (en) * 1970-02-04 1975-04-01 Foster Wheeler Corporation Liquid metal heat exchanger
GB1447051A (en) * 1973-04-16 1976-08-25 Atomic Energy Authority Uk Tube-in-shell heat exchangers
DE2724605A1 (de) * 1976-07-15 1978-01-19 Combustion Eng Waermetauscher
DE2725877A1 (de) * 1977-06-08 1978-12-21 Interatom Waermetauscher fuer aggressive medien
FR2429402A1 (fr) * 1978-06-22 1980-01-18 Commissariat Energie Atomique Echangeur intermediaire pour reacteur nucleaire a neutrons rapides
FR2444246A1 (fr) * 1978-12-12 1980-07-11 Novatome Ind Perfectionnements a un echangeur de chaleur
FR2452687A1 (fr) * 1979-03-28 1980-10-24 Stein Industrie Echangeur de chaleur a zone centrale avec conduits coaxiaux et zone d'echange peripherique

Also Published As

Publication number Publication date
ES502705A0 (es) 1982-05-01
EP0041452A2 (fr) 1981-12-09
EP0041452A3 (en) 1981-12-16
DE3160726D1 (en) 1983-09-08
FR2483592A1 (fr) 1981-12-04
ES8204534A1 (es) 1982-05-01
US4423770A (en) 1984-01-03
FR2483592B1 (es) 1985-02-08
JPS57120096A (en) 1982-07-26

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