SE448328B - PROCEDURE FOR PREPARING A NUCLEAR FUEL WITH ANNUAL LAYER AND NUCLEAR FUEL PREPARED ACCORDING TO THE PROCEDURE - Google Patents
PROCEDURE FOR PREPARING A NUCLEAR FUEL WITH ANNUAL LAYER AND NUCLEAR FUEL PREPARED ACCORDING TO THE PROCEDUREInfo
- Publication number
- SE448328B SE448328B SE8203044A SE8203044A SE448328B SE 448328 B SE448328 B SE 448328B SE 8203044 A SE8203044 A SE 8203044A SE 8203044 A SE8203044 A SE 8203044A SE 448328 B SE448328 B SE 448328B
- Authority
- SE
- Sweden
- Prior art keywords
- central
- nuclear fuel
- outer part
- batches
- procedure
- Prior art date
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
- G21C3/42—Selection of substances for use as reactor fuel
- G21C3/58—Solid reactor fuel Pellets made of fissile material
- G21C3/62—Ceramic fuel
- G21C3/623—Oxide fuels
-
- 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
- G21C3/42—Selection of substances for use as reactor fuel
- G21C3/58—Solid reactor fuel Pellets made of fissile material
- G21C3/62—Ceramic fuel
-
- 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 & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Glanulating (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Description
" sintringen, 448 328 som omfattar att man använder två satser av pulverformigt kärn- bränslematerial; som skiljer sig åt beträffande isotopisk anrik- ning, att man formar satserna till ämnen för den centrala resp; den yttre delen, att man sammanför ämnena och pressar det samman- satta materialet för bildning av en sammansatt presskropp och att man sintrar den sammansatta presskroppen, varvid förfarandet kännetecknas av att satserna av kärnbränslematerial är i granule- rad form och är kombinerbara med varandra med avseende på kemis- ka och värmeutvidgningsegenskaper, att ämnena till den cengrala _ resp. den yttre delen formas genom pressning av vardera av de gra- nulerade satserna vid lägre tryck än som användes vid pressning av den sammansatta presskroppen och att ämnena till den centrala och den yttre delen är väsentligen keramiskt identiska till så- dan utsträckning, att de kommer att krympa i samma grad och vid ungefär samma hastignet under sintringi Z Uppfinningen avser även en kärnbränslekuts med ringformiga skikt, vilken framställts genom förfarandet enligt uppfinningen. "sintering, 448 328 which involves the use of two batches of powdered nuclear fuel material; which differs in isotopic enrichment, that the batches are formed into blanks for the central and the outer part; the composite material for forming a composite compact and sintering the composite compact, the process being characterized in that the batches of nuclear fuel material are in granular form and are compatible with each other with respect to chemical and thermal expansion properties, that the blanks for the composite the central part or the outer part is formed by pressing each of the granulated batches at a lower pressure than that used for pressing the composite body and that the blanks for the central and the outer part are substantially ceramic identical to such an extent, that the invention will also shrink to the same degree and at approximately the same speed during sintering. annular fuel pellet, which is produced by the process according to the invention.
Både oxider och karbider anses vara lämpliga eldfasta material för användning i kärnbränslekutsar och kan användas i föreliggan- de uppfinning; Emellertid underförstås att vid val av eldfast ma-I terial för användning i uppfinningen måste normala försiktignets- åtgärder iakttagas genom användning av eldfasta pulver med lik- nande aktivitet för de två delarna, samt att_ in a) de två delarna skall vara kemiskt kombinerbara med varandra och med sintringsatmosfären, b) värmeutvidgningskännetecknen för de två delarna skall vara kombinerbara, " f ' f f c) ingendera delen skall genomgå en fasförändring, som förorsa- kar en volymändring inom det temperaturområde, som råder under d) de två delarna skall vara keramiskt identiska till sådan ut-d sträckning, att de kommer att krympa med samma mängd och vid un-, gefär samma hastighet under sintring.Both oxides and carbides are considered suitable refractories for use in nuclear fuel pellets and can be used in the present invention; However, it is understood that in selecting refractory materials for use in the invention, normal precautions must be taken by using refractory powders having similar activity for the two parts, and that in a) the two parts must be chemically compatible with each other. and with the sintering atmosphere, b) the thermal expansion characteristics of the two parts shall be compatible, "f 'ffc) neither part shall undergo a phase change which causes a volume change within the temperature range prevailing under d) the two parts shall be ceramic identical to such an extension that they will shrink at the same amount and at about the same speed during sintering.
'Det föredragna eldfasta materialet utgöres av urandioxid, var- till kan sättas andra material för att underlätta sintring, för- bättra kornstorlek/tillväxt eller ge porer med reglerad densitet¿ \ 53% ._>l-^ 3 samt tillsatser, som_ger kärnkännetecken, t.ex. plutoniumdioxid.' Fördelar med kutsar med ringformiga skikt, vari delarna är sam- manbundna i enlighet med föreliggande uppfinning, utgör den kla- 'ra uppdelningen mellan delarna, de fixerade positionerna för de- larna i förhållande till varandra och det.fullständiga utnyttjan- _det av det tillgängliga utrymmet för bränslekutsarna.The preferred refractory material is uranium dioxide, to which other materials may be added to facilitate sintering, improve grain size / growth or to give pores of controlled density ¿53% ._> l- ^ 3 as well as additives which give core characteristics, for example plutonium dioxide. ' Advantages of annular layered cushions in which the parts are bonded together in accordance with the present invention constitute the clear division between the parts, the fixed positions of the parts relative to each other and the full utilization of the available the space for the fuel pellets.
I ett föredraget exempel på utförande av uppfinningen användes två satser av urandioxidpulver med 3,52% anrikning och 0,387% anrikning; Det 3,52% anrikade pulvret blandades med tillräcklig. mängd flyktig porbildande tillsats för sänkning av den slutliga' sintrade-densiteten för kutsen, som framställts med denna oxid, med 5%. Ingen tillsats gjordes till den 0,387% anrikade oxiden.In a preferred example of carrying out the invention, two batches of uranium dioxide powder with 3.52% enrichment and 0.387% enrichment were used; The 3.52% enriched powder was mixed with sufficient. amount of volatile pore-forming additive to lower the final sintered density of the pellet produced with this oxide by 5%. No addition was made to the 0.387% enriched oxide.
Pulvren komprimerades separat vid 0,75 te/cm2 och granulerades genom en sikt med storleken 120Ö mikrometer. 0,2% zinkstearat till- sattes såsom Smörjmedel till båda kornsatserna som därefter pres- 2 för bildning av en central del och sades i formar vid 1,5 te/cm en ringformig del till kutsar med en densitet av 4,9-5,2 g per cmz, varvid det 3,52% anrikade materialet användes för den yttre ringformiga delen och det O,387% anrikade materialet för den cent- rala delen. De yttre ringformade delarna pressades i en form med en avlägsningsbar karnstav, som uttogs efter pressning, varvid erhölls ett hål. En central del infördes i hålet i vardera yttre del och en stamp med plan överdel användes för pressning av de_ sammansatta delarna till en slutlig osintrad densitet av 5,6-5,8 g/cmz med användning av ett tryck av 4 te/cmz. Det sammansatta Z vkomprimerade materialet sintrades därefter i ca 5 timmar vid ï1700OC; Detta gav sammanhängande kutsar med en total densitet in- om området 95,2-95,6% av den teoretiska, varvid den ringformiga _ delen och den centrala delen hade en densitet av 98,7 resp. 93,7%.The powders were compressed separately at 0.75 tea / cm 2 and granulated through a 120Ö micrometer sieve. 0.2% zinc stearate was added as a lubricant to both batches which were then pressed to form a central portion and added in molds at 1.5 teas / cm an annular portion to pellets with a density of 4.9-5. 2 g per cm 2, using the 3.52% enriched material for the outer annular portion and the 38.87% enriched material for the central portion. The outer annular portions were pressed into a mold with a removable core rod, which was removed after pressing, whereby a hole was obtained. A central portion was inserted into the hole in each outer portion and a flat top stamp was used to press the composite portions to a final unsintered density of 5.6-5.8 g / cm 2 using a pressure of 4 teas / cm 2. The composite Z 2 compressed material was then sintered for about 5 hours at 170 ° C; This gave contiguous pellets with a total density within the range 95.2-95.6% of the theoretical, the annular part and the central part having a density of 98.7 and 9, respectively. 93.7%.
Kutsar med ringformiga skikt med ett centralt hål kan framställas på liknande sätt med användning av en form med fast stavformig 'kärna för pressning av de sammansatta centrala och yttre rinqfor- miga delarna.Arches with annular layers with a central hole can be made in a similar manner using a solid rod-shaped mold for pressing the composite central and outer annular members.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8115360 | 1981-05-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8203044L SE8203044L (en) | 1982-11-20 |
SE448328B true SE448328B (en) | 1987-02-09 |
Family
ID=10521911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8203044A SE448328B (en) | 1981-05-19 | 1982-05-14 | PROCEDURE FOR PREPARING A NUCLEAR FUEL WITH ANNUAL LAYER AND NUCLEAR FUEL PREPARED ACCORDING TO THE PROCEDURE |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5832194A (en) |
AU (1) | AU548688B2 (en) |
BE (1) | BE893238A (en) |
DE (1) | DE3218779A1 (en) |
ES (1) | ES8402973A1 (en) |
FR (1) | FR2506497B1 (en) |
IT (1) | IT1157012B (en) |
SE (1) | SE448328B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8406208D0 (en) * | 1984-03-09 | 1984-05-10 | British Nuclear Fuels Plc | Fabrication of nuclear fuel pellets |
DE19846019C1 (en) * | 1998-10-06 | 2000-04-13 | Siemens Ag | Fuel tablet with layer structure |
DE19912824A1 (en) * | 1999-03-22 | 2000-09-28 | Siemens Ag | Fuel element used for a nuclear reactor consists of fuel rods filled with pellets of partially splittable material |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB831679A (en) * | 1957-05-21 | 1960-03-30 | Norton Grinding Wheel Co Ltd | Ceramic nuclear fuel element |
BE622326A (en) * | 1961-09-11 | |||
GB1134746A (en) * | 1964-12-14 | 1968-11-27 | Atomic Energy Authority Uk | Improvements in or relating to the manufacture of moulded bodies |
FR1434251A (en) * | 1965-02-22 | 1966-04-08 | Commissariat Energie Atomique | Improvements in sintered nuclear fuels, in particular uranium dioxide, and their preparation processes |
GB1397014A (en) * | 1972-04-13 | 1975-06-11 | Atomic Energy Of Australia | Fabrication process for nuclear fuel pellets |
-
1982
- 1982-05-14 SE SE8203044A patent/SE448328B/en not_active IP Right Cessation
- 1982-05-18 BE BE0/208132A patent/BE893238A/en not_active IP Right Cessation
- 1982-05-18 FR FR8208721A patent/FR2506497B1/en not_active Expired
- 1982-05-18 DE DE3218779A patent/DE3218779A1/en not_active Withdrawn
- 1982-05-18 ES ES512301A patent/ES8402973A1/en not_active Expired
- 1982-05-18 IT IT67652/82A patent/IT1157012B/en active
- 1982-05-18 JP JP57083904A patent/JPS5832194A/en active Granted
- 1982-05-18 AU AU83778/82A patent/AU548688B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
ES512301A0 (en) | 1984-03-01 |
DE3218779A1 (en) | 1982-12-09 |
IT8267652A0 (en) | 1982-05-18 |
FR2506497A1 (en) | 1982-11-26 |
AU548688B2 (en) | 1986-01-02 |
ES8402973A1 (en) | 1984-03-01 |
SE8203044L (en) | 1982-11-20 |
AU8377882A (en) | 1983-11-24 |
JPH043515B2 (en) | 1992-01-23 |
JPS5832194A (en) | 1983-02-25 |
FR2506497B1 (en) | 1985-12-20 |
BE893238A (en) | 1982-11-18 |
IT1157012B (en) | 1987-02-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69312985T2 (en) | Ceramic articles and processes for the production of ceramic articles and for sintering | |
CA2661603C (en) | Spherical fuel element and production thereof for gas-cooled high temperature pebble bed nuclear reactors (htr) | |
CA1188501A (en) | Burnable neutron absorbers | |
DE2855785A1 (en) | METHOD OF MANUFACTURING A Sintered SILICON NITRIDE ARTICLE | |
EP0034328A1 (en) | Process for producing shaped bodies based on silicon carbide | |
KR101082060B1 (en) | Method for the sintered annular nuclear fuel pellet | |
JPH0631759B2 (en) | Nuclear fuel | |
EP0082370A1 (en) | Method of producing dense silicon nitride ceramic articles having controlled surface layer composition | |
US4859385A (en) | Method for making a furnace component | |
KR100855108B1 (en) | Method of manufacturing u3o8 powder and method of manufacturing uo2 fuel pellets using the same | |
US3283040A (en) | Method of forming a carbon body | |
SE448328B (en) | PROCEDURE FOR PREPARING A NUCLEAR FUEL WITH ANNUAL LAYER AND NUCLEAR FUEL PREPARED ACCORDING TO THE PROCEDURE | |
US4432915A (en) | Method for producing nuclear fuel pellets, and product thereof | |
GB2098787A (en) | Production of pellets for nuclear fuel elements | |
US4863657A (en) | Method of making semi-conductor diffusion furnace components | |
JPH01136094A (en) | Manufacture of ceramic nuclear fuel pellet | |
ES8609179A1 (en) | Process for producing a sintered silicon carbide/carbon composite ceramic body having ultrafine grain microstructure. | |
KR20110089801A (en) | Uranium dioxide fuel pellet including ni oxide and al oxide and the manufacturing method thereof | |
US3342562A (en) | High density urania fuel elements | |
US4771021A (en) | Semi-conductor diffusion furnace components | |
KR100982664B1 (en) | Method for the sintered annular nuclear fuel pellet | |
KR101029616B1 (en) | Rod-inserted sintering method for the annular nuclear fuel pellet | |
SE415216B (en) | PROCEDURE FOR MANUFACTURING SINTERED CERAMIC NUCLEAR FUEL EXCHANGE WITH REGULATED POROSITY | |
US3157523A (en) | Manganese oxide ceramics and methods for their preparation | |
US3291869A (en) | Nuclear fuel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
Ref document number: 8203044-6 Effective date: 19931210 Format of ref document f/p: F |