DE19610977C1 - Nuclear reactor of the boiling water type - Google Patents

Nuclear reactor of the boiling water type

Info

Publication number
DE19610977C1
DE19610977C1 DE19610977A DE19610977A DE19610977C1 DE 19610977 C1 DE19610977 C1 DE 19610977C1 DE 19610977 A DE19610977 A DE 19610977A DE 19610977 A DE19610977 A DE 19610977A DE 19610977 C1 DE19610977 C1 DE 19610977C1
Authority
DE
Germany
Prior art keywords
nuclear reactor
catalyst material
reactor according
alloy
fuel elements
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 - Fee Related
Application number
DE19610977A
Other languages
German (de)
Inventor
Norbert Dr Henzel
Uve Dipl Ing Reitzner
Friedrich Dipl Ing Garzarolli
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19610977A priority Critical patent/DE19610977C1/en
Priority to PCT/EP1997/001229 priority patent/WO1997035319A1/en
Priority to JP9533114A priority patent/JP2000506977A/en
Priority to EP97914221A priority patent/EP0888620A1/en
Application granted granted Critical
Publication of DE19610977C1 publication Critical patent/DE19610977C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Metallurgy (AREA)
  • Catalysts (AREA)

Abstract

The invention concerns a nuclear reactor, in particular a boiling-water reactor, containing fuel elements and a catalytic material designed to eliminate oxidizing agents. The invention calls for the catalytic material to form part of the fuel elements. For instance, the fuel elements or parts or them may be coated with the catalytic material or they may consist of an alloy which contains the material.

Description

Die Erfindung betrifft einen Kernreaktor, insbesondere einen Siedewasserreaktor, der Brennelemente aufweist und ein Katalysatormaterial zum Beseitigen von Oxidationsmitteln ent­ hält.The invention relates to a nuclear reactor, in particular one Boiling water reactor, which has fuel elements and a Ent catalyst material to remove oxidants holds.

Aus der EP 0 599 618 A1 ist ein solcher Kernreaktor bekannt. Dieser Kernreaktor enthält ein Katalysatormaterial, mit dem z. B. das Oxidationsmittel Wasserstoffperoxid in Wasser und Sauerstoff überführt wird. Wasserstoffperoxid kann durch Radiolyse aus dem Reaktorwasser entstehen und trägt zur Spannungsrißkorrosion bei.Such a nuclear reactor is known from EP 0 599 618 A1. This nuclear reactor contains a catalyst material with which e.g. B. the oxidizing agent hydrogen peroxide in water and Oxygen is transferred. Hydrogen peroxide can pass through Radiolysis arise from the reactor water and contributes to Stress corrosion cracking.

Aus der EP 0 599 618 A1 ist insbesondere zu entnehmen, daß durch den Einsatz eines Katalysatormaterials die Produkte der Radiolyse, nämlich Wasserstoff, Sauerstoff und Wasserstoff­ peroxid, in Wasser überführt werden können. Dabei bildet sich Wasser aus Wasserstoffperoxid und Wasserstoff. Wasser und Sauerstoff bilden sich aus Wasserstoffperoxid, wonach aus dem Sauerstoff und vorhandenem Wasserstoff nochmals Wasser gebil­ det wird.EP 0 599 618 A1 in particular shows that the products of the Radiolysis, namely hydrogen, oxygen and hydrogen peroxide, can be transferred into water. It forms Water from hydrogen peroxide and hydrogen. water and Oxygen are formed from hydrogen peroxide, after which the Oxygen and hydrogen present again water det.

Bei der bekannten Vorrichtung ist das Katalysatormaterial Bestandteil einer Katalysatorstruktur, die ein zusätzliches Bauteil im Kern­ reaktor ist. Diese Struktur kann wabenförmig sein und aus Drähten, Streifen oder Bändern bestehen. Ein solches se­ parates Bauteil beansprucht Platz im Kernreaktor und muß sta­ bil befestigt sein. Es ist daher mit einfachen Mitteln nicht austauschbar.In the known device, the catalyst material is part of a Catalyst structure, which is an additional component in the core is reactor. This structure can be honeycomb-shaped and consist of wires, strips or ribbons. Such a se a separate component takes up space in the nuclear reactor and must be sta bil be attached. It is therefore not by simple means interchangeable.

Der Erfindung liegt die Aufgabe zugrunde, einen Kernreaktor an­ zugeben, in dem Katalysatormaterial so angeordnet ist, daß keine aufwendigen, zusätzlichen Einbauten oder Bauteile erforderlich sind.The invention has for its object a nuclear reactor admit in the catalyst material is arranged so that  no complex, additional internals or components required are.

Die Aufgabe wird gemäß der Erfindung dadurch gelöst, daß das Katalysatormaterial Bestandteil der Brennelemente ist.The object is achieved in that the Catalyst material is part of the fuel assemblies.

Es kann auch Bestandteil nur von Teilen der Brennelemente sein. Solche Teile sind z. B. Brennelementkästen, Brennelementhüll­ rohre und/oder Brennelementabstandshalter.It can also be part of only parts of the fuel assemblies. Such parts are e.g. B. fuel boxes, fuel shell tubes and / or fuel element spacers.

Mit dem Kernreaktor nach der Erfindung wird der Vorteil erzielt, daß keine zu­ sätzlichen Einbauten im Kernreaktor erforderlich sind. Darüber hinaus wird der Vorteil erzielt, daß das Katalysator­ material im Inneren des Reaktorkerns konzentriert ist, wo durch Radiolyse die Oxidationsmittel entstehen, die zerstört werden sollen. Man erzielt folglich eine verbesserte Wirksam­ keit beim Beseitigen von Oxidationsmitteln, z. B. von Wasser­ stoffperoxid. Dadurch wird eine Spannungsrißkorrosion zuver­ lässiger als bisher verhindert.With the nuclear reactor according to the invention the advantage is achieved that none too additional installations in the nuclear reactor are required. In addition, the advantage is achieved that the catalyst material is concentrated inside the reactor core where through radiolysis the oxidants are created which are destroyed should be. This results in an improved effectiveness speed in removing oxidizing agents, e.g. B. of water fabric peroxide. This will result in stress corrosion cracking prevented more relaxed than before.

Brennelemente oder Teile davon können bei einer üblichen Wartung des Kernreaktors leicht ausgetauscht werden. Damit ist es vorteilhafterweise möglich, falls eine Beschädigung des Katalysatormaterials festgestellt werden sollte, schnell und zuverlässig durch den Austausch von Brennelementen oder Teilen davon neues Katalysatormaterial in den Kernreaktor einzubringen.Fuel elements or parts thereof can be used in a conventional Maintenance of the nuclear reactor can be easily replaced. In order to it is advantageously possible in the event of damage of the catalyst material should be determined quickly and reliable by replacing fuel elements or Parts of it new catalyst material in the nuclear reactor bring in.

In einer vorteilhaften Ausführungsform sind die Brennelemente ganz oder zum Teil mit dem Katalysatormaterial beschichtet. Eine solche Beschichtung reicht aus, da die Zersetzung von Oxidationsmitteln nur an der Oberfläche des Katalysatormaterials abläuft.In an advantageous embodiment, the fuel assemblies are wholly or in part with coated the catalyst material. Such a coating is sufficient because the decomposition of oxidizing agents is only sufficient the surface of the catalyst material runs off.

Nach einer anderen Ausführungsform können die Brennelemente oder Teile davon aus einer Legierung bestehen, die das Katalysatormaterial enthält. Dabei reicht es aus, wenn beispielsweise 0,1% bis 2%, insbesondere nur 0,1%, der Le­ gierung Katalysatormaterial ist. Eine Legierung ist im besonderen Maße mechanisch widerstandsfähig gegen Katalysatorabtrag im strömenden Medium.According to another embodiment, the fuel assemblies or Parts of it are made of an alloy that Contains catalyst material. It is sufficient if for example 0.1% to 2%, in particular only 0.1%, of Le gation catalyst material. An alloy is in the  special dimensions mechanically resistant to Removal of catalyst in the flowing medium.

Da die Brennelemente üblicherweise aus Zirkaloy bestehen, können sie beispielsweise aus einer Zirkaloy-Katalysatorma­ terial-Legierung aufgebaut sein.Since the fuel assemblies are usually made of Zirkaloy, you can, for example, from a Zirkaloy catalyst ma material alloy can be built.

Das Katalysatormaterial enthält beispielsweise Edelmetall oder Metalloxid, z. B. Platin oder Palladium bzw. Wolframoxid oder Titanoxid.The catalyst material contains, for example, noble metal or metal oxide, e.g. B. platinum or palladium or tungsten oxide or titanium oxide.

Brennelemente mit Katalysatorzusatz sind beispielsweise auch für einen Kernreaktor geeignet, in den Wasserstoff eingespeist wird, um Wasserstoffperoxid und Sauerstoff vollständig in Wasser umzuwandeln. Zum Einspeisen des Wasserstoffs ist dann eine Vorrichtung vorhanden.Fuel elements with added catalyst are also, for example suitable for a nuclear reactor into which hydrogen is fed, to hydrogen peroxide and oxygen completely in water convert. To feed the hydrogen is then a device is present.

Mit dem Kernreaktor nach der Erfindung wird insbesondere der Vorteil erzielt, daß zur Beseitigung von Oxidationsmitteln, die zur Spannungsrißkorrosion beitragen, keine zusätzlichen Einbauten oder Bauteile im Kernreaktor erforderlich sind.With the nuclear reactor according to the invention, in particular Achieved the advantage that to remove oxidizing agents, that contribute to stress corrosion cracking, no additional Installations or components in the nuclear reactor are required.

Claims (7)

1. Kernreaktor, insbesondere Siedewasserreaktor, der Brenn­ elemente aufweist und ein Katalysatormaterial zum Beseitigen von Oxidationsmitteln enthält, dadurch gekennzeichnet, daß das Kataly­ satormaterial Bestandteil der Brennelemente ist.1. Nuclear reactor, in particular boiling water reactor, which has fuel elements and contains a catalyst material for removing oxidizing agents, characterized in that the catalyst material is part of the fuel elements. 2. Kernreaktor nach Anspruch 1, dadurch gekennzeichnet, daß die Brenn­ elemente oder Teile davon mit dem Katalysatormaterial beschichtet sind.2. Nuclear reactor according to claim 1, characterized in that the focal elements or parts thereof with the catalyst material are coated. 3. Kernreaktor nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Brenn­ elemente oder Teile davon aus einer Legierung bestehen, die das Katalysatormaterial enthält.3. Nuclear reactor according to one of claims 1 or 2, characterized in that the focal elements or parts thereof are made of an alloy which contains the catalyst material. 4. Kernreaktor nach Anspruch 3, dadurch gekennzeichnet, daß 0,1% bis 2% der Legierung Katalysatormaterial ist.4. Nuclear reactor according to claim 3, characterized in that 0.1% to 2% the alloy is catalyst material. 5. Kernreaktor nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Legie­ rung eine Legierung aus Zirkaloy und Katalysatormaterial ist.5. Nuclear reactor according to claim 3 or 4, characterized in that the Legie tion is an alloy of Zircaloy and catalyst material. 6. Kernreaktor nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Kataly­ satormaterial Edelmetall oder Metalloxid enthält.6. Nuclear reactor according to one of claims 1 to 5, characterized in that the Kataly satormaterial contains noble metal or metal oxide. 7. Kernreaktor nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß eine Vor­ richtung zum Einspeisen von Wasserstoff vorhanden ist.7. Nuclear reactor according to one of claims 1 to 6, characterized in that a pre direction for feeding hydrogen is present.
DE19610977A 1996-03-20 1996-03-20 Nuclear reactor of the boiling water type Expired - Fee Related DE19610977C1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19610977A DE19610977C1 (en) 1996-03-20 1996-03-20 Nuclear reactor of the boiling water type
PCT/EP1997/001229 WO1997035319A1 (en) 1996-03-20 1997-03-11 Nuclear reactor containing catalytic material for the elimination of oxidizing agents
JP9533114A JP2000506977A (en) 1996-03-20 1997-03-11 Nuclear reactor containing catalytic material for removing oxidants
EP97914221A EP0888620A1 (en) 1996-03-20 1997-03-11 Nuclear reactor containing catalytic material for the elimination of oxidizing agents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19610977A DE19610977C1 (en) 1996-03-20 1996-03-20 Nuclear reactor of the boiling water type

Publications (1)

Publication Number Publication Date
DE19610977C1 true DE19610977C1 (en) 1997-04-10

Family

ID=7788869

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19610977A Expired - Fee Related DE19610977C1 (en) 1996-03-20 1996-03-20 Nuclear reactor of the boiling water type

Country Status (4)

Country Link
EP (1) EP0888620A1 (en)
JP (1) JP2000506977A (en)
DE (1) DE19610977C1 (en)
WO (1) WO1997035319A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388955A2 (en) * 1989-03-22 1990-09-26 NIS Ingenieurgesellschaft mbH Device for removal of hydrogen from a gas mixture by recombination
DE4126468A1 (en) * 1991-08-09 1993-02-11 Techno Invest Entwicklung Von METHOD FOR TREATING THE PRIMARY COOLANT OF A PRESSURE WATER REACTOR
EP0599618A1 (en) * 1992-11-25 1994-06-01 General Electric Company Internal passive water recombiner/hydrogen peroxide decomposer for a boiling water reactor
EP0670575A1 (en) * 1993-12-13 1995-09-06 GESELLSCHAFT FÜR ANLAGEN- UND REAKTORSICHERHEIT ( GRS) mbH Device for removing free hydrogen from a gas mixture containing hydrogen and oxygen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5662955A (en) * 1979-10-26 1981-05-29 Hitachi Ltd Manufacture of nuclear fuel cladding pipe
US5135709A (en) * 1991-05-13 1992-08-04 General Electric Company Method for reducing corrosion of components exposed to high-temperature water
US5147602A (en) * 1991-05-20 1992-09-15 General Electric Company Corrosion resistant high chromium stainless steel alloy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0388955A2 (en) * 1989-03-22 1990-09-26 NIS Ingenieurgesellschaft mbH Device for removal of hydrogen from a gas mixture by recombination
DE4126468A1 (en) * 1991-08-09 1993-02-11 Techno Invest Entwicklung Von METHOD FOR TREATING THE PRIMARY COOLANT OF A PRESSURE WATER REACTOR
EP0599618A1 (en) * 1992-11-25 1994-06-01 General Electric Company Internal passive water recombiner/hydrogen peroxide decomposer for a boiling water reactor
EP0670575A1 (en) * 1993-12-13 1995-09-06 GESELLSCHAFT FÜR ANLAGEN- UND REAKTORSICHERHEIT ( GRS) mbH Device for removing free hydrogen from a gas mixture containing hydrogen and oxygen

Also Published As

Publication number Publication date
EP0888620A1 (en) 1999-01-07
WO1997035319A1 (en) 1997-09-25
JP2000506977A (en) 2000-06-06

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Legal Events

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8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
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8339 Ceased/non-payment of the annual fee