US3828518A - Fuel rod fabrication - Google Patents

Fuel rod fabrication Download PDF

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Publication number
US3828518A
US3828518A US00105890A US10589071A US3828518A US 3828518 A US3828518 A US 3828518A US 00105890 A US00105890 A US 00105890A US 10589071 A US10589071 A US 10589071A US 3828518 A US3828518 A US 3828518A
Authority
US
United States
Prior art keywords
fuel rod
enclosure
rod
closure
sealing
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 - Lifetime
Application number
US00105890A
Other languages
English (en)
Inventor
E Silk
C Moore
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.)
Babcock International Ltd
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
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 Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Priority to US00105890A priority Critical patent/US3828518A/en
Priority to CA129,929A priority patent/CA949137A/en
Priority to AU36897/71A priority patent/AU462858B2/en
Priority to NL7117415A priority patent/NL168074C/xx
Priority to ES398202A priority patent/ES398202A1/es
Priority to DE2164193A priority patent/DE2164193B2/de
Priority to IT32901/71A priority patent/IT944352B/it
Priority to JP46105545A priority patent/JPS5127836B1/ja
Priority to BE777700A priority patent/BE777700A/xx
Priority to CH17972A priority patent/CH549263A/fr
Priority to FR7200745A priority patent/FR2167247B1/fr
Priority to GB154972A priority patent/GB1373180A/en
Priority to LU64583D priority patent/LU64583A1/xx
Application granted granted Critical
Publication of US3828518A publication Critical patent/US3828518A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G21C3/02—Fuel elements
    • G21C3/04—Constructional details
    • G21C3/06—Casings; Jackets
    • G21C3/10—End closures ; Means for tight mounting therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/162—Arc welding or cutting making use of shielding gas making use of a stationary fluid
    • 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

Definitions

  • ABSTRACT A process of sealing the external junction between an end-closure and a long fuel rod of a slender nature in a controlled gaseous environment by a rotating electrode passing through a predetermined path around the periphery of the junction.
  • a device for accomplishing the aforesaid process wherein the fuel rod is held in a horizontal attitude at a predetermined position while a rotating electrode operatively fuses the end-closure to such fuel rod.
  • this invention relates to a process of sealing end closures-to fuel rods containing radioactive fuel in an inert gaseous environment under pressure and a device for accomplishing the same.
  • closures In the process of fabricating fuel rods of a nuclear nature, closures must be sealed in position on the end of relatively long slender rods containing radioactive fuel maintained in an inert gaseous medium under pressure.
  • the classical method of sealing such end-closures to fuel rods incorporated large and complicated evacuation chambers with excessive pump-down time inherently resulting in low production capabilities, high capital cost and very large spacial requirements for set-up of the sealing apparatus.
  • the subject invention answers the needs of the art with special emphasis on the achievement of a totally effective processing technique having optimum efficiency in the shortest possible time without encountering the aforesaid difficulties of the art.
  • FIG. 1 is a top plan view in section of the device of this invention.
  • FIG. 2 is a side view in section of the device of FIG. 1.
  • FIG. 3 is a front view in section of the same device.
  • the subject invention encompasses the longitudinal insertion of a linear workpiece of the nuclear fuel rod variety having an end-closure to a predetermined position into an enclosure having a controlled inert gaseous environment under pressure, then securing such workpiece in position relative to the peripheral circuit of a sealing means of a welding nature, subsequently sealing the external junction formed between such closure and such fuel rod, and extracting such fuel rod in sealed condition ready for use in the core of a nuclear reactor.
  • the device for use in the present process is provided with an enclosure or chamber 10 having means for control of environment therein.
  • the latter means is in the form of an aperture 11 in the lower surface of the chamber which operatively communicates in controlled alternate fashion with either an evacuation pump 12 or a gaseous environmental source 13 maintained under pressure.
  • the ends of the chamber are each provided with a port which are in axial alignment with each other.
  • the ports 14 and 15 are each provided with sealing means 16 and 17 of the conventional variety for use in maintaining the desired environment within the chamber.
  • the entrance port 14 is adapted for receptive insertion of one end of the fuel rod 18 while the exit port 15 is adapted to insure external travel of such fuel rod 18 through a sealed communicating circuit of piping into an external glove box (not shown) after traversement of the chamber as will be hereinafter more clearly described.
  • the chamber 10 is provided with insulated base means 21 having a supporting housing 22 within which is rotatably mounted a cylindrical shaft 23 having a longitudinal passageway 24 of open end construction in axial alignment with the aforesaid ports 14 and 15.
  • a cylindrical support plate 25 is operatively mounted in one end of the shaft and is provided with an opening26 in axial alighment with the passageway 24 of the shaft 23.
  • a sealing device 27 of the TIG welding variety is supportably mounted on the outer peripheral portion of the plate 25, as shown in FIG. 2, and is positioned so that the head 28 thereof travels in a predetermined course around the periphery of the fuel rod 18 when the shaft 23 with its attached plate 25 is revolved within the housing 22.
  • electrical contact fingers 31 provides power to operate the welding device 27 from a power source (not shown) while movement of the plate 25 around its axis is imparted through the gear train 32 and 33 from a motive source 34. In this way, the operating welding head 27 is rotated in an annular path around the periphery of the fuel rod 18.
  • a cylindrical cam 36 of the buttonvariety is mounted on the support housing 22 for separable engagement with the body of the welding device 27 through an arm 37 during the processing of a plurality of fuel rods 18.
  • the cam 36 is operatively connected to a double action air cylinder 39, which is electrically controlled by a power source (not shown) through the use of conventional circuitry, for the extension of such cam 36 upon completion of the welding cycle and the retraction of such cam 36 upon the initiation of a new cycle. This eliminates the possibility of the fuel rod 18 striking and damaging the electrode or head 28 during insertion or removal of the fuel rod from the chamber 10.
  • An arm 41 is pivotally mounted on the base 21 by means of a' shaft 42 through a support 43 and is designed, when actuated, to travel to a position intersecting the axial path of the fuel rod 18 as shown in FIG. 2.
  • the retractable arm 41 functions in the form of a stop against further linear movement of the fuel rod 18 and the latter is in a predetermined position for the operative sealing of the external juncture between the end-closure and fuel rod by the electrode or head 28.
  • the arm 41 is actuated into pivotal motion by an air cylinder 44 of the pushpull variety through a linkage 45 which communicates with the shaft 42.
  • the two step air cylinder 44 is such that it functions to extend and retract the linkage 45 by the action of the power source through conventional circuitry.
  • an engagement means 51 of the clamp variety is designed to grasp the fuel rod 18 and hold it in position relative ,to the path of the functioning electrode 28 in the welding head.
  • the clamping surfaces 52, and 53 of the engagement means 51 are provided with an aperture 54 which is in axial alignment with the path of the fuel rod 18 as it passes through the entrance port and is adapted to receive the fuel rod 18 upon its insertable travel through the chamber 10.
  • the clamp 51 is of a vise type nature and is actuated by a conventional air-cylinder 55 of the pushpull variety through a linkage 56 upon being energized by the aforesaid power source.
  • an empty fuel rod 18 of the long, slender variety is inserted in the entrance port 14 and passed through the linear aperture 54 of the engagement 51 into the longitudinal passageway 24 of the shaft 23 and out through the exit port 15 of the chamber 10.
  • a series of processing stations are passed by the fuel rod wherein the fuel rod is loaded with radioactive material under an inert gaseous environment and adapted with a closure 61 on its open end.
  • the enclosure is evacuated by the pump 12 and the desired gaseous environment is applied under a predetermined pressure from a gaseous source station 13 into such enclosure 10 until the desired state of conditions is obtained.
  • the loaded fuel rod 18 is then withdrawn through the exit port until it clears the passageway 24 and is spacially in position adjacent the inner surface of the engagement means 51.
  • the air cylinder 44 is energized from a power source (not shown) and the retractable arm 41 is pivoted through a linkage 45 and shaft 42 into a position across the axial path of the fuel rod 18.
  • the end of the latter rod, which is provided with the end closure 61 is then pushed into separable engagement with the arm 41 which functions as a stop controlling the further forward linear motion of the rod and positioning the juncture between the end-closure 61 and the fuel rod 18 operatively in the path of the rotating welding head 28.
  • the air-cylinder 55 is energized through the power source and the fuel rod 18 is clamped in position by the closing action of the engagement means 51.
  • the air-cylinder 44 then functions to retract the linkage 45 and pivot the arm 41 out of engagement with the end of the fuel rod 18 through the action of the shaft 42.
  • Rotary motion is then imparted to the plate 25 by a motive force 34 through the action of a gear train 32 and 33 thereby imparting rotary motion to the welding assembly 27 and electrode 28 in operative fashion around the periphery of the aforesaid external junction between the end-closure 61 and fuel rod 18.
  • the sealing action of the weld head 27 is accomplished when energy is provided by the central power source (not shown) through the use of electrical contact finger assembly 31. As a result, the energized weld point or electrode 28 will seal the aforesaid juncture.
  • the air-cylinder 39 will be activated and the cam 36 will move forward and through the cooperative action of arm 37, the welding head 27 will be moved out of its peripheral circuit or path thereby separating from engagement with the described juncture of the end closure 61 and fuel rod 18.
  • a device for sealing an open-end nuclear reactor fuel rod comprising an enclosure having a pair of aligned openings, sealing means associated with said openings for engaging the fuel rod when the rod is received within said enclosure and for maintaining a vacuum and a gas under pressure within the enclosure, means for controlling the environment within said enclosure, a rotatably mounted shaft within said enclosure having a longitudinally disposed passageway in alignment with said pair of enclosure openings, a plate secured to one end of said shaft for rotation therewith, said plate having an opening in further alignment with said passageway and said enclosure openings, welding means secured to said plate for rotation with said plate,
  • a method for sealing an open-ended nuclear reactor fuel rod comprising the steps of inserting the open end of the rod entirely through an enclosure, loading the rod with nuclear fuel, evacuating the atmosphere within the enclosure, establishing a predetermined gaseous environment within said evacuated enclosure, placing a fuel rod end closure on the open end of the fuel rod, drawing the loaded fuel rod back into the enclosure, pivoting a pivotable arm into engagement with the loaded fuel rod to align the end closure with a welding assembly, clamping the loaded fuel rod in said aligned position, driving said welding assembly in a generally circular path about the end closure and the loaded fuel rod to weld the closure to the rod, and releasing the clamped fuel rod.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Arc Welding In General (AREA)
  • Fuel Cell (AREA)
  • Wire Bonding (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
US00105890A 1971-01-12 1971-01-12 Fuel rod fabrication Expired - Lifetime US3828518A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US00105890A US3828518A (en) 1971-01-12 1971-01-12 Fuel rod fabrication
CA129,929A CA949137A (en) 1971-01-12 1971-12-13 Fuel rod fabrication
AU36897/71A AU462858B2 (en) 1971-01-12 1971-12-15 Nuclear fuel rod fabrication
NL7117415A NL168074C (nl) 1971-01-12 1971-12-17 Inrichting voor het sluiten van splijtstofstaven.
ES398202A ES398202A1 (es) 1971-01-12 1971-12-21 Procedimiento para el cierre de varillas conteniendo com- bustible nuclear y dispositivo correspondiente.
DE2164193A DE2164193B2 (de) 1971-01-12 1971-12-23 Anordnung und Verfahren zum Befestigen von End verschlüssen von Brennstabhülleji
IT32901/71A IT944352B (it) 1971-01-12 1971-12-24 Processo per fissare a tenuta uns chiusura terminale ad una barra combustibile di tipo nucleare e dispositivo attuante tale processo
JP46105545A JPS5127836B1 (xx) 1971-01-12 1971-12-27
BE777700A BE777700A (fr) 1971-01-12 1972-01-05 Fabrication des barres de combustible
CH17972A CH549263A (fr) 1971-01-12 1972-01-06 Procede de soudure d'une obturation de cartouche de combustible nucleaire.
FR7200745A FR2167247B1 (xx) 1971-01-12 1972-01-11
GB154972A GB1373180A (en) 1971-01-12 1972-01-12 Assembly for and a method of the welding of nuclear fuel cans
LU64583D LU64583A1 (xx) 1971-01-12 1972-01-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00105890A US3828518A (en) 1971-01-12 1971-01-12 Fuel rod fabrication

Publications (1)

Publication Number Publication Date
US3828518A true US3828518A (en) 1974-08-13

Family

ID=22308347

Family Applications (1)

Application Number Title Priority Date Filing Date
US00105890A Expired - Lifetime US3828518A (en) 1971-01-12 1971-01-12 Fuel rod fabrication

Country Status (13)

Country Link
US (1) US3828518A (xx)
JP (1) JPS5127836B1 (xx)
AU (1) AU462858B2 (xx)
BE (1) BE777700A (xx)
CA (1) CA949137A (xx)
CH (1) CH549263A (xx)
DE (1) DE2164193B2 (xx)
ES (1) ES398202A1 (xx)
FR (1) FR2167247B1 (xx)
GB (1) GB1373180A (xx)
IT (1) IT944352B (xx)
LU (1) LU64583A1 (xx)
NL (1) NL168074C (xx)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188521A (en) * 1977-08-15 1980-02-12 Westinghouse Electric Corp. Apparatus for welding an end plug in a nuclear fuel tube
US4480171A (en) * 1982-11-30 1984-10-30 The United States Of America As Represented By The United States Department Of Energy Gas tungsten arc welder with electrode grinder
US4495146A (en) * 1981-12-07 1985-01-22 Exxon Nuclear Company, Inc. Spherical nuclear fuel loading system
US4542267A (en) * 1982-11-30 1985-09-17 The United States Of America As Represented By The United States Department Of Energy Automated closure system for nuclear reactor fuel assemblies
US4548347A (en) * 1982-11-30 1985-10-22 The United States Of America As Represented By The United States Department Of Energy Automated fuel pin loading system
US4558982A (en) * 1984-06-27 1985-12-17 The United States Of America As Represented By The Secretary Of The United States Department Of Energy Evacuate and backfill apparatus and method
US4822987A (en) * 1988-01-25 1989-04-18 Westinghouse Electric Corp. Method and apparatus for providing fuel rod identification to permit traceability during manufacture and use
US4837419A (en) * 1988-06-02 1989-06-06 Westinghouse Electric Corp. Fuel rod end plug welding apparatus and method
US5674411A (en) * 1996-03-18 1997-10-07 General Electric Company Method of welding control rod tube ends and end caps
WO2023004208A3 (en) * 2021-05-19 2023-05-25 Westinghouse Electric Company Llc Helium flow stop assembly (hfsa) for tig welding process of nuclear fuel rods
US12005680B2 (en) 2010-12-02 2024-06-11 International Automotive Components Group Gmbh Interior paneling component for a motor vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2625022B1 (fr) * 1987-12-18 1993-09-17 Framatome Sa Procede de fermeture etanche d'un element combustible nucleaire

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790787A (en) * 1931-02-03 Machine fob welding hollow bodies under abnormal pressure
US2481042A (en) * 1945-06-15 1949-09-06 Knapp Monarch Co Apparatus for charging and sealing metallic bulbs
US2816407A (en) * 1955-06-23 1957-12-17 Schafer Flottmann & Co G M B H Container filling process and apparatus
US2884748A (en) * 1954-09-29 1959-05-05 Western Electric Co Method of and apparatus for assembling and filling platens
US2893182A (en) * 1957-12-20 1959-07-07 Texas Instruments Inc Method of sealing resistors
US2994169A (en) * 1959-11-20 1961-08-01 Western Electric Co Apparatus for exhausting traveling wave tubes
US3256672A (en) * 1962-08-21 1966-06-21 Anaconda American Brass Co Evacuation and sealing of refrigerator tubes
US3389846A (en) * 1966-11-03 1968-06-25 Gen Dynamics Corp Automatic pipe welder
US3725635A (en) * 1971-08-20 1973-04-03 Westinghouse Electric Corp Method of and apparatus for welding an end plug onto a nuclear fuel element

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790787A (en) * 1931-02-03 Machine fob welding hollow bodies under abnormal pressure
US2481042A (en) * 1945-06-15 1949-09-06 Knapp Monarch Co Apparatus for charging and sealing metallic bulbs
US2884748A (en) * 1954-09-29 1959-05-05 Western Electric Co Method of and apparatus for assembling and filling platens
US2816407A (en) * 1955-06-23 1957-12-17 Schafer Flottmann & Co G M B H Container filling process and apparatus
US2893182A (en) * 1957-12-20 1959-07-07 Texas Instruments Inc Method of sealing resistors
US2994169A (en) * 1959-11-20 1961-08-01 Western Electric Co Apparatus for exhausting traveling wave tubes
US3256672A (en) * 1962-08-21 1966-06-21 Anaconda American Brass Co Evacuation and sealing of refrigerator tubes
US3389846A (en) * 1966-11-03 1968-06-25 Gen Dynamics Corp Automatic pipe welder
US3725635A (en) * 1971-08-20 1973-04-03 Westinghouse Electric Corp Method of and apparatus for welding an end plug onto a nuclear fuel element

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188521A (en) * 1977-08-15 1980-02-12 Westinghouse Electric Corp. Apparatus for welding an end plug in a nuclear fuel tube
US4495146A (en) * 1981-12-07 1985-01-22 Exxon Nuclear Company, Inc. Spherical nuclear fuel loading system
US4480171A (en) * 1982-11-30 1984-10-30 The United States Of America As Represented By The United States Department Of Energy Gas tungsten arc welder with electrode grinder
US4542267A (en) * 1982-11-30 1985-09-17 The United States Of America As Represented By The United States Department Of Energy Automated closure system for nuclear reactor fuel assemblies
US4548347A (en) * 1982-11-30 1985-10-22 The United States Of America As Represented By The United States Department Of Energy Automated fuel pin loading system
US4558982A (en) * 1984-06-27 1985-12-17 The United States Of America As Represented By The Secretary Of The United States Department Of Energy Evacuate and backfill apparatus and method
US4822987A (en) * 1988-01-25 1989-04-18 Westinghouse Electric Corp. Method and apparatus for providing fuel rod identification to permit traceability during manufacture and use
EP0325914A2 (en) * 1988-01-25 1989-08-02 Westinghouse Electric Corporation Method and apparatus for providing identification indicia on nuclear fuel rods
EP0325914A3 (en) * 1988-01-25 1990-06-20 Westinghouse Electric Corporation Method and apparatus for providing identification indicia on nuclear fuel rods
US4837419A (en) * 1988-06-02 1989-06-06 Westinghouse Electric Corp. Fuel rod end plug welding apparatus and method
US5674411A (en) * 1996-03-18 1997-10-07 General Electric Company Method of welding control rod tube ends and end caps
US12005680B2 (en) 2010-12-02 2024-06-11 International Automotive Components Group Gmbh Interior paneling component for a motor vehicle
WO2023004208A3 (en) * 2021-05-19 2023-05-25 Westinghouse Electric Company Llc Helium flow stop assembly (hfsa) for tig welding process of nuclear fuel rods

Also Published As

Publication number Publication date
NL168074B (nl) 1981-09-16
IT944352B (it) 1973-04-20
FR2167247A1 (xx) 1973-08-24
AU462858B2 (en) 1975-07-10
GB1373180A (en) 1974-11-06
LU64583A1 (xx) 1972-06-22
DE2164193A1 (de) 1972-08-03
AU3689771A (en) 1973-06-21
NL168074C (nl) 1982-02-16
DE2164193B2 (de) 1974-12-12
NL7117415A (xx) 1972-07-14
FR2167247B1 (xx) 1976-07-23
CA949137A (en) 1974-06-11
CH549263A (fr) 1974-05-15
JPS5127836B1 (xx) 1976-08-14
ES398202A1 (es) 1975-06-16
BE777700A (fr) 1972-07-05

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