FR3122028B1 - Fuel pellet comprising an improved metal insert - Google Patents

Fuel pellet comprising an improved metal insert Download PDF

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Publication number
FR3122028B1
FR3122028B1 FR2103968A FR2103968A FR3122028B1 FR 3122028 B1 FR3122028 B1 FR 3122028B1 FR 2103968 A FR2103968 A FR 2103968A FR 2103968 A FR2103968 A FR 2103968A FR 3122028 B1 FR3122028 B1 FR 3122028B1
Authority
FR
France
Prior art keywords
fuel
fuel pellet
metal insert
pellet
central body
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.)
Active
Application number
FR2103968A
Other languages
French (fr)
Other versions
FR3122028A1 (en
Inventor
Coulon Emmanuelle Picard
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
Commissariat a lEnergie Atomique et aux Energies Alternatives 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, Commissariat a lEnergie Atomique et aux Energies Alternatives CEA filed Critical Commissariat a lEnergie Atomique CEA
Priority to FR2103968A priority Critical patent/FR3122028B1/en
Priority to PCT/EP2022/059155 priority patent/WO2022218782A1/en
Publication of FR3122028A1 publication Critical patent/FR3122028A1/en
Application granted granted Critical
Publication of FR3122028B1 publication Critical patent/FR3122028B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G21C3/02—Fuel elements
    • G21C3/04—Constructional details
    • G21C3/16—Details of the construction within the casing
    • G21C3/18—Internal spacers or other non-active material within the casing, e.g. compensating for expansion of fuel rods or for compensating excess reactivity
    • 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
    • G21C3/045—Pellets
    • 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
    • G21C3/16—Details of the construction within the casing
    • G21C3/20—Details of the construction within the casing with coating on fuel or on inside of casing; with non-active interlayer between casing and active material with multiple casings or multiple active layers
    • 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

Abstract

Pastille combustible comprenant un insert métallique perfectionné. L’invention concerne une pastille combustible (1) comprenant un matériau combustible (10) nucléaire fissile, et au moins un insert (11) métallique disposé dans le matériau combustible (10). L’insert (11) métallique comprend un corps central (110) creux rempli par le matériau combustible (10), sur lequel est disposée une pluralité d’ailettes (111), chaque ailette (111) s’étendant radialement depuis le corps central (110) creux vers le pourtour extérieur (1a) de la pastille combustible (1). La pastille combustible (1) améliore la sûreté des crayons de combustibles en réduisant les risques d’altération de la gaine du crayon. La pastille combustible (1) présente une conductivité thermique améliorée. La pastille combustible (1) permet en outre de réduire le risque d’altération de la gaine par des produits de fission. La pastille présente une température de fusion plus élevée grâce au corps central Figure pour l’abrégé : Fig.2AFuel pellet comprising an improved metal insert. The invention relates to a fuel pellet (1) comprising a fissile nuclear fuel material (10), and at least one metal insert (11) disposed in the fuel material (10). The metal insert (11) comprises a hollow central body (110) filled with the combustible material (10), on which is arranged a plurality of fins (111), each fin (111) extending radially from the central body (110) hollow towards the outer periphery (1a) of the fuel pellet (1). The fuel pellet (1) improves the safety of fuel rods by reducing the risk of damage to the rod sheath. The fuel pellet (1) has improved thermal conductivity. The fuel pellet (1) also makes it possible to reduce the risk of damage to the cladding by fission products. The pellet has a higher melting temperature thanks to the central body Figure for abstract: Fig.2A

FR2103968A 2021-04-16 2021-04-16 Fuel pellet comprising an improved metal insert Active FR3122028B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR2103968A FR3122028B1 (en) 2021-04-16 2021-04-16 Fuel pellet comprising an improved metal insert
PCT/EP2022/059155 WO2022218782A1 (en) 2021-04-16 2022-04-06 Fuel pellet comprising an improved metal insert

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2103968A FR3122028B1 (en) 2021-04-16 2021-04-16 Fuel pellet comprising an improved metal insert
FR2103968 2021-04-16

Publications (2)

Publication Number Publication Date
FR3122028A1 FR3122028A1 (en) 2022-10-21
FR3122028B1 true FR3122028B1 (en) 2023-12-22

Family

ID=76523090

Family Applications (1)

Application Number Title Priority Date Filing Date
FR2103968A Active FR3122028B1 (en) 2021-04-16 2021-04-16 Fuel pellet comprising an improved metal insert

Country Status (2)

Country Link
FR (1) FR3122028B1 (en)
WO (1) WO2022218782A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE584791A (en) * 1958-12-01
JPS58147677A (en) * 1982-02-26 1983-09-02 日本核燃料開発株式会社 Nuclear fuel element
JPH067099U (en) * 1990-12-21 1994-01-28 日本核燃料開発株式会社 Nuclear fuel element
JPH1026684A (en) * 1996-07-10 1998-01-27 Nippon Nuclear Fuel Dev Co Ltd Production of nuclear fuel pellet
US11404177B2 (en) * 2019-10-23 2022-08-02 Battelle Energy Alliance, Llc Reactor fuel pellets with thermally-conductive inserts, and related reactor fuel pellet arrangements

Also Published As

Publication number Publication date
WO2022218782A1 (en) 2022-10-20
FR3122028A1 (en) 2022-10-21

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