EP0006795B1 - Echangeur intermédiaire pour réacteur nucléaire à neutrons rapides - Google Patents

Echangeur intermédiaire pour réacteur nucléaire à neutrons rapides Download PDF

Info

Publication number
EP0006795B1
EP0006795B1 EP79400389A EP79400389A EP0006795B1 EP 0006795 B1 EP0006795 B1 EP 0006795B1 EP 79400389 A EP79400389 A EP 79400389A EP 79400389 A EP79400389 A EP 79400389A EP 0006795 B1 EP0006795 B1 EP 0006795B1
Authority
EP
European Patent Office
Prior art keywords
tubes
heat
bracing elements
layers
exchanger according
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
EP79400389A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0006795A1 (fr
Inventor
Patrick Jogand
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0006795A1 publication Critical patent/EP0006795A1/fr
Application granted granted Critical
Publication of EP0006795B1 publication Critical patent/EP0006795B1/fr
Expired legal-status Critical Current

Links

Images

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
    • 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
    • F28D7/16—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 in parallel spaced relation
    • F28D7/163—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 in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1669—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 in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0133—Auxiliary supports for elements for tubes or tube-assemblies formed by concentric strips
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/40—Shell enclosed conduit assembly
    • Y10S165/401—Shell enclosed conduit assembly including tube support or shell-side flow director
    • Y10S165/416—Extending transverse of shell, e.g. fin, baffle
    • Y10S165/423—Bar

Definitions

  • the present invention relates to reactors, in which the cooling of the core is ensured by continuous circulation of a liquid metal, usually sodium, contained inside a main tank in which the core is immersed, the calories acquired by the liquid metal passing through the latter in contact with the fuel assemblies being transferred to a secondary fluid, also sodium, internally traversing the tubes of an intermediate exchanger plunging into the tank, the liquid metal cooling the core playing the role of fluid primary circulating outside these tubes, in heat exchange relationship with the secondary fluid.
  • the secondary fluid which is thus heated is then returned outside the reactor vessel to a generator capable of supplying pressurized steam directly under pressure in an electricity production installation.
  • the present invention relates more particularly to an arrangement of the internal structure of such an intermediate exchanger, comprising, in known manner, a cylindrical internal ferrule with vertical axis, an external ferrule coaxial with the internal ferrule, two plates of horizontal annular tubes disposed in the vicinity of the upper and lower extremities of said ferrules, a bundle of straight tubes extending between the tube plates in cylindrical plies coaxial with the ferrules, these plies being braced mutually by transverse belts formed by horizontal bands carrying elements of generally hollow bracing housed between the tubes of the plies and in contact with them, the intake and discharge manifolds of the secondary fluid circulating inside the tubes being respectively provided under the lower plate and above the upper plate, the internal ferrule forming a conduit for supplying the secondary fluid to the intake manifold while the outer shell is extended upwards by an outlet duct for the same secondary fluid collected in the evacuation manifold after passage through the tubes, and inlet and outlet windows distributed around the axis of the external shell for admission and evacuation, in the vicinity
  • the primary fluid therefore penetrates transversely into the exchanger through the inlet windows, spreading in the space between the external and internal ferrules, in order to circulate after a first change of direction substantially. at 90 ° in contact with the beam tubes, the flow taking place over most of the length of these tubes against the current of the secondary fluid, the primary fluid undergoing a second change of direction again by 90 ° for s '' evacuate out of the exchanger through its outlet windows.
  • the present invention aims to overcome this drawback, by ensuring a more homogeneous distribution of the hot primary fluid at the entrance into the exchanger through the tubes of the bundle, in particular between the layers of internal and external tubes.
  • the exchanger according to the invention is characterized in that the bundle of tubes comprises means capable of producing a greater supply in the region occupied by the tubes of the internal plies than in the region occupied by the tubes of the plies. external, said means creating, in the circulation of the primary fluid inside the exchanger, a variable pressure drop.
  • the means for producing said supply consist of interlacing elements integral with the bracing belts of the tubes, these elements being hollow or solid and defining at least two concentric zones with different pressure losses.
  • the tubes of the bundle are distributed in at least two zones with, in the internal plies, a radial and / or circumferential pitch more reduced than in the external plies.
  • the reference 1 designates as a whole, an intermediate exchanger according to the invention, intended to be mounted inside a tank (not shown) of a fast neutron nuclear reactor, comprising in particular a transverse step 2 crossed by the body of the exchanger.
  • This step delimits inside the tank, two regions respectively 3 and 4, region 3 receiving the coolant metal leaving the reactor core, therefore having acquired calories in contact with the fuel assemblies, this sodium after crossing the 'intermediate exchanger 1 being collected under the step 2 in region 4, at a significantly lower temperature, as a result of the heat exchange carried out in the exchanger with a secondary fluid.
  • the primary and secondary fluids consist of liquid sodium.
  • the exchanger 1 mainly consists of a cylindrical internal ferrule 5, with a vertical axis, and an also cylindrical external ferrule 6, coaxial with the first, these two ferrules being joined, respectively in the vicinity of their upper and lower ends, by two horizontal tube plates 7 and 8. Between these plates 7 and 8, extend the tubes 9 of a bundle of straight tubes, inside which circulates the secondary fluid exchanging calories with the primary fluid, itself even flowing in the exchanger outside the tubes 9. In the bundle, the tubes 9 are suitably braced between them to form cylindrical sheets, coaxial with the ferrules and in which the tubes are maintained at a spacing determined by l 'Intermediate transverse belts 10, the detail of which appears more clearly in the partial view of FIG. 2.
  • the exchanger At its lower end, the exchanger comprises a bottom 11 which delimits with the tubular plate 8 an intake manifold 12 for the secondary fluid, brought into the exchanger by the interior of the internal ferrule 5, the latter comprising an open lower end 13.
  • the secondary fluid thus admitted inside the manifold 12 flows into the tubes 9 of the bundle and it is finally collected in an upper manifold 14 delimited between the internal ferrule 5 and an extension 15 of the ferrule external 6.
  • the hot primary fluid in region 3 enters the interior of the intermediate exchanger through inlet windows 17, regularly distributed around the axis of the exchanger, in the outer shell 6. This primary fluid flows then from top to bottom in contact with the tubes 9 of the bundle over most of the length of the latter, against the current of the secondary fluid which passes inside these same tubes from bottom to top.
  • the primary fluid flows out of the outer shell 6 through outlet windows 18, also regularly distributed around the axis of this shell.
  • Fig. 2 illustrates in more detail the practical embodiment of the bracing belts 10, making it possible to maintain the tubes 9 of the bundle with a determined spacing, at the same time as ensuring protection of these tubes from vibrations due to circulation of the primary fluid.
  • the belts 10 are in particular constituted by means of horizontal bands 19 against which are welded elements of hollow tubes, such as 20 and 21.
  • bracing elements which are constituted here by the tube elements 20 and 21 of the bracing belts 10 provided between the ferrules 5 and 6, are determined so that they have different lengths, in particular such that the hollow elements 20, of greater length, are arranged in the external plies of the bundle, while the elements 21 of shorter length are provided in the internal plies.
  • the above solution can be improved, by making a greater number of zones, for example three or four comprising in each, hollow elements of different lengths, varying gradually from the external layers to the internal layers.
  • the different concentric zones are produced by giving the cross section horizontal bracing elements bearing the general reference 30 of the shapes or contours suitable for creating different pressure drops the pressure drop decreasing when going from the periphery to the center.
  • bracing elements 30a which are constituted by portions of tubes of thickness e 1 .
  • the bracing elements 30b are still portions of tubes of thickness e 2 greater than e 1, the tubes having the same outside diameter as the tubes 30a.
  • the bracing elements 30c consist of solid rods whose outside diameter is equal to that of the tubes 30a and 30b.
  • bracing elements 30d are formed by the association of a solid rod 30'd similar to the rod 30c and an extension 30 "d inserted between the exchange tubes 9.
  • the elements 30d could have a cross section having another outline.
  • the different zones could be defined only by portions of tubes (30a, 30b) of different thicknesses.
  • the overfeeding of the regions occupied by the external plies on the one hand and the internal plies on the other hand can be obtained by shifting, according to the length of these tubes, the bracing belts 10, so that the elements bracing 22 which are fixed thereon, arranged in contact with these tubes, create in these layers a funneling effect, with the formation of a horizontal velocity component in the flow of the primary fluid towards the center of the device, notably improving the supply of the internal layers.
  • the elements 22 are hollow.
  • each hollow element creates a localized pressure drop and that it is the progressive offset of the hollow elements in the axial direction which achieves the funneling effect and therefore the horizontal component of the fluid flow speed.
  • the tubes of the bundle are arranged in two zones, respectively 9a and 9b, where they have different radial and circumferential pitches, the tubes 9a in the vicinity of the internal ferrule 5 having smaller pitches than the tubes 9b in the vicinity of the outer shroud 6.
  • the two preceding zones are separated by an inner skirt 23, coaxial with the shrouds 5 and 6. It can therefore be seen that in this embodiment, the best distribution of the fluid is obtained by creating pressure drops different in the same horizontal plane.
  • anti-vibration belts can also be placed in the latter, creating, as in the examples in FIGS. 1 and 4, differentiated pressure drops, in order to counterbalance the lower linear pressure drop due to the larger pitch of the tubes 9b.
EP79400389A 1978-06-22 1979-06-13 Echangeur intermédiaire pour réacteur nucléaire à neutrons rapides Expired EP0006795B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7818711 1978-06-22
FR7818711A FR2429402A1 (fr) 1978-06-22 1978-06-22 Echangeur intermediaire pour reacteur nucleaire a neutrons rapides

Publications (2)

Publication Number Publication Date
EP0006795A1 EP0006795A1 (fr) 1980-01-09
EP0006795B1 true EP0006795B1 (fr) 1981-10-14

Family

ID=9209854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400389A Expired EP0006795B1 (fr) 1978-06-22 1979-06-13 Echangeur intermédiaire pour réacteur nucléaire à neutrons rapides

Country Status (6)

Country Link
US (1) US4305458A (ja)
EP (1) EP0006795B1 (ja)
JP (1) JPS552999A (ja)
DE (1) DE2960987D1 (ja)
ES (1) ES481716A1 (ja)
FR (1) FR2429402A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106461344A (zh) * 2014-05-13 2017-02-22 国际壳牌研究有限公司 用于冷却合成气体的热交换装置及其组装方法

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2477692B1 (fr) * 1980-03-07 1985-12-06 Commissariat Energie Atomique Echangeur intermediaire pour reacteur nucleaire a neutrons rapides
FR2483592A1 (fr) * 1980-06-02 1981-12-04 Stein Industrie Dispositif de reduction des contraintes thermiques sur un echangeur de chaleur
DE3337236A1 (de) * 1983-10-13 1985-04-25 Mollerus, Alexander, 7128 Lauffen Schleuse fuer tunnel-waschmaschine
JPH01118729A (ja) * 1988-09-14 1989-05-11 Trguv Magnusson Harcon Jr サンプルの分光分析方法及び分光光度計
DE3931685A1 (de) * 1989-09-22 1991-04-04 Borsig Babcock Ag Waermetauscher zum kuehlen von reaktionsgas
WO1995029631A1 (fr) * 1994-04-28 1995-11-09 Noboru Soejima Equipement utilise pour mesurer l'axe du corps humain et procede de correction de la deviation de l'axe du corps
US5894883A (en) * 1998-03-25 1999-04-20 Phillips Petroleum Company Shell and tube heat exchanger
US20080175951A1 (en) 2007-01-23 2008-07-24 Rule David D Methods, apparatuses and systems of fermentation
CA3048702A1 (fr) 2010-04-23 2011-10-27 Atomic Energy Of Canada Limited/Energie Atomique Du Canada Limitee Pressure-tube reactor with coolant plenum
EP3506318B1 (en) 2010-04-23 2020-10-14 Atomic Energy of Canada Limited/ Énergie Atomique du Canada Limitée Pressure-tube reactor and method of operating the same
US20150206604A1 (en) 2012-06-13 2015-07-23 Atomic Energy Of Canada Limited / Énergie Atomique Du Canada Limitée Fuel channel assembly and fuel bundle for a nuclear reactor
EP3301683B1 (en) * 2012-06-13 2019-08-07 Atomic Energy of Canada Limited/ Énergie Atomique du Canada Limitée A pressure-tube nuclear reactor with a low pressure moderator and fuel channel assembly
US20170023305A1 (en) * 2015-07-22 2017-01-26 General Electric Company Steam generator having an integrated modular heat exchanger
US11754349B2 (en) * 2019-03-08 2023-09-12 Hamilton Sundstrand Corporation Heat exchanger
CN111486740B (zh) * 2020-04-23 2021-09-28 中国原子能科学研究院 换热器及其组装方法
US11802736B2 (en) 2020-07-29 2023-10-31 Hamilton Sundstrand Corporation Annular heat exchanger
CN114608359B (zh) * 2022-03-11 2024-03-26 河南恒天久大实业有限公司 一种具有复合管板的换热器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505695A (en) * 1945-09-22 1950-04-25 Tech Studien Ag Tube nest for heat exchangers
DE1235962B (de) * 1964-01-24 1967-03-09 Babcock & Wilcox Dampfkessel Rohrdistanzierung fuer Waermetauscher
CH493811A (de) * 1967-09-06 1970-07-15 Basf Ag Wärmetauschvorrichtung
DE1675501C3 (de) * 1968-03-12 1975-10-23 Deggendorfer Werft Und Eisenbau Gmbh, 8360 Deggendorf Einrichtung zum gleichmässigen Verteilen von Wärmetauschmedien bei Reaktionsapparaten mit einem Rohrbündel
JPS4819178U (ja) * 1971-07-12 1973-03-03
SE384914B (sv) * 1973-04-06 1976-05-24 Stal Laval Apparat Ab Vermevexlare for kondensering av anga (kondensor)
US3916990A (en) * 1974-02-25 1975-11-04 Foster Wheeler Corp Gas turbine regenerator
JPS5147645A (ja) * 1974-10-23 1976-04-23 Kawasaki Heavy Ind Ltd Takanshikinetsukokanki
JPS51124701A (en) * 1975-04-21 1976-10-30 Ibanobichi Sabin Nikorai Multiple tube type heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106461344A (zh) * 2014-05-13 2017-02-22 国际壳牌研究有限公司 用于冷却合成气体的热交换装置及其组装方法
CN106461344B (zh) * 2014-05-13 2019-03-01 气体产品与化学公司 用于冷却合成气体的热交换装置及其组装方法

Also Published As

Publication number Publication date
ES481716A1 (es) 1980-08-16
JPS552999A (en) 1980-01-10
JPH0250398B2 (ja) 1990-11-02
FR2429402A1 (fr) 1980-01-18
US4305458A (en) 1981-12-15
DE2960987D1 (en) 1981-12-24
FR2429402B1 (ja) 1981-11-20
EP0006795A1 (fr) 1980-01-09

Similar Documents

Publication Publication Date Title
EP0006795B1 (fr) Echangeur intermédiaire pour réacteur nucléaire à neutrons rapides
EP0004218B1 (fr) Réacteur nucléaire à neutrons rapides comportant au moins un échangeur auxiliaire
EP3405723B1 (fr) Echangeur de chaleur à condensation muni d'un dispositif d'échanges thermiques
EP0167418B1 (fr) Tube à double paroi pour un échangeur de chaleur et procédé de réalisation de ce tube
FR2600200A1 (fr) Ensemble de pompe/echangeur de chaleur intermediaire pour un reacteur nucleaire refroidi par un metal liquide
EP0147304B1 (fr) Générateur de vapeur sodium-eau à tubes concentriques droits et à circulation de gaz dans l'espace annulaire
EP0057643B1 (fr) Dispositif de protection de la plaque tubulaire à l'extrémité chaude d'un échangeur de chaleur vertical
EP0012691B1 (fr) Perfectionnements à un échangeur de chaleur
CH514100A (fr) Chaudière
EP0020265B1 (fr) Echangeur de chaleur pour réacteur nucléaire
EP0138677A2 (fr) Perfectionnements apportés aux tubes échangeurs de chaleur, aux échangeurs réalisés avec de tel tubes, et aux installations à turbines à gaz comportant de tels échangeurs
EP0241345B1 (fr) Réacteur nucléaire à guidage d'écoulement dans les équipements internes supérieurs
EP0006800B1 (fr) Chaudière nucléaire à neutrons rapides à métal caloporteur
FR2545256A1 (fr) Assemblage combustible pour reacteurs rapides
CH622091A5 (ja)
EP0320403B1 (fr) Grille de fluidisation refroidie
EP0036347B1 (fr) Echangeur de chaleur intermédiaire pour réacteur nucléaire à neutrons rapides
EP0117191A1 (fr) Générateur de vapeur pour un réacteur nucléaire refroidi par du métal liquide
MX2012001989A (es) Aparato de soldadura para tubo oblongo de revestimiento de aluminio para planta de condesacion de sistema de enfriamiento con aire.
FR2623278A1 (fr) Echangeur de chaleur sous forme d'un element a tubes jumeles
EP0216667B1 (fr) Dispositif de retenue de liquide dans une canalisation sensiblement horizontale présentant une extrémité ouverte lorsque, le débit du liquide descend en-dessous d'un seuil donné
BE1020494A3 (fr) Echangeur a flux alternatif.
FR2627262A1 (fr) Chaudiere verticale pour le chauffage de fluides caloporteurs
EP0462903B1 (fr) Echangeur de chaleur tubulaire pour fluides respectivement chaud et froid à grandes différences respectivement de température et de pression
EP0165840B1 (fr) Echangeur de chaleur pour le refroidissement d'un métal liquide par de l'air

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB IT NL

17P Request for examination filed
ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE GB IT NL

REF Corresponds to:

Ref document number: 2960987

Country of ref document: DE

Date of ref document: 19811224

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19890602

Year of fee payment: 11

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19890630

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19900630

BERE Be: lapsed

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE ETABLISSEMENT D

Effective date: 19900630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19910101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910601

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910611

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920613

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930302

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT