GB1017089A - Process for coating powder reactor fuels with carbon - Google Patents

Process for coating powder reactor fuels with carbon

Info

Publication number
GB1017089A
GB1017089A GB44902/62A GB4490262A GB1017089A GB 1017089 A GB1017089 A GB 1017089A GB 44902/62 A GB44902/62 A GB 44902/62A GB 4490262 A GB4490262 A GB 4490262A GB 1017089 A GB1017089 A GB 1017089A
Authority
GB
United Kingdom
Prior art keywords
pipe
ring
surrounded
gas
carrier gas
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
GB44902/62A
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Publication of GB1017089A publication Critical patent/GB1017089A/en
Expired legal-status Critical Current

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
    • G21C3/626—Coated fuel particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/003—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic followed by coating of the granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1818—Feeding of the fluidising gas
    • B01J8/1827—Feeding of the fluidising gas the fluidising gas being a reactant
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Combustion & Propulsion (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

Powder reactor fuels, e.g. mixed crystals of powdered UC-ThC or UC2-ThC2, are coated with carbon in a reaction space by subjecting the fuels, held suspended in a fluidized bed, to the action of a hydrocarbon gas, e.g. methane, <PICT:1017089/C6-C7/1> using at least one pipe through which the fluidizing medium is passed, at a temperature (e.g. 1400-2200 DEG C.) sufficient to liberate carbon by decomposition, the gas being admixed with a carrier gas, e.g. argon, so as to maintain the temperature inside the pipe below the decomposition temperature of the hydrocarbon gas. The pipe may be cooled conventionally. The coating may be carried out in the apparatus shown in the Figure wherein the ring pipe assembly 4 consisting of a pipe 5, a ring 6 and a cap 7, made of high-melting metal, e.g. tantalum, is arranged at the inlet of the reaction space 1 surrounded by a graphite casing 2, the pipe 5 being connected to an inlet tube 8 for the hydrocarbon gas K and the ring 6 being connected to an inlet tube 9 for the carrier gas T so that the carrier gas flowing through the annular gap 10 cools the pipe 5. The tube 9 may also be surrounded concentrically by water cooling tubes, 12, 13, the casing being surrounded by a heating element 14.ALSO:Powder reactor fuels, e.g. mixed crystals of powdered UC-ThC or UC2ThC2, are coated with carbon in a reaction space by subjecting the fuelds, held suspended in a fluidized bed, to the action of a hydrocarbon gas, e.g. methane, using at least one pipe through which the fluidizing medium is passed, at a temperature (e.g. 1400-2200 DEG C.) sufficient to liberate carbon by decomposition, the gas being mixed with a carrier gas, e.g. argon, so as to maintain the temperature inside the pipe below the decomposition temperature of the hydrocarbon gas. The pipe may be cooled conventionally. The coating may be carried out in the apparatus shown in the Figure wherein the ring pipe assembly 4 consisting of a pipe 5, a ring 6 and a cap 7, made of high-melting metal, e.g. <PICT:1017089/C1/1> tantalum, is arranged at the inlet of the reaction space 1 surrounded by a graphite casing 2, the pipe 5 being connected to an inlet tube 8 for the hydrocarbon gas K and the ring 6 being connected to an inlet tube 9 for the carrier gas T so that the carrier gas flowing through the annular gap 10 cools the pipe 5. The tube 9 may also be surrounded concentrically by water cooling tubes 12, 13, the casing being surrounded by a heating element 14.
GB44902/62A 1961-11-29 1962-11-27 Process for coating powder reactor fuels with carbon Expired GB1017089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT906261A AT235988B (en) 1961-11-29 1961-11-29 Process for coating powdered reactor fuels with carbon

Publications (1)

Publication Number Publication Date
GB1017089A true GB1017089A (en) 1966-01-12

Family

ID=3610870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44902/62A Expired GB1017089A (en) 1961-11-29 1962-11-27 Process for coating powder reactor fuels with carbon

Country Status (3)

Country Link
AT (1) AT235988B (en)
CH (1) CH413138A (en)
GB (1) GB1017089A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229120A1 (en) * 1973-05-08 1974-12-06 Euratom
FR2344932A1 (en) * 1976-03-20 1977-10-14 Kernforschungsanlage Juelich NOZZLE TO SPRAY GAS
EP0025574A1 (en) * 1979-09-18 1981-03-25 Forschungszentrum Jülich Gmbh Nozzle for admitting gases

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626446C3 (en) * 1976-06-12 1978-12-14 Hobeg Hochtemperaturreaktor-Brennelement Gmbh, 6450 Hanau Process for the coating of particles for the production of fuel and / or absorber elements for nuclear reactors and apparatus therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2229120A1 (en) * 1973-05-08 1974-12-06 Euratom
FR2344932A1 (en) * 1976-03-20 1977-10-14 Kernforschungsanlage Juelich NOZZLE TO SPRAY GAS
EP0025574A1 (en) * 1979-09-18 1981-03-25 Forschungszentrum Jülich Gmbh Nozzle for admitting gases

Also Published As

Publication number Publication date
CH413138A (en) 1966-05-15
AT235988B (en) 1964-09-25

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