US3173320A - Machine for separating irradiated fuel slugs from their jackets - Google Patents
Machine for separating irradiated fuel slugs from their jackets Download PDFInfo
- Publication number
- US3173320A US3173320A US146022A US14602261A US3173320A US 3173320 A US3173320 A US 3173320A US 146022 A US146022 A US 146022A US 14602261 A US14602261 A US 14602261A US 3173320 A US3173320 A US 3173320A
- Authority
- US
- United States
- Prior art keywords
- slug
- jacket
- separator member
- carriage
- hole
- 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
Links
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/34—Apparatus or processes for dismantling nuclear fuel, e.g. before reprocessing ; Apparatus or processes for dismantling strings of spent fuel elements
- G21C19/36—Mechanical means only
-
- 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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S83/00—Cutting
- Y10S83/924—Work wrapped or coated around a core, not part of the machine
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S83/00—Cutting
- Y10S83/929—Particular nature of work or product
- Y10S83/93—Radioactive
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/04—Processes
- Y10T83/0596—Cutting wall of hollow work
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/202—With product handling means
- Y10T83/2074—Including means to divert one portion of product from another
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/768—Rotatable disc tool pair or tool and carrier
- Y10T83/7755—Carrier for rotatable tool movable during cutting
- Y10T83/7763—Tool carrier reciprocable rectilinearly
- Y10T83/7776—With means to reciprocate carrier
Definitions
- the present invention relates to methods and machines for separation from their jackets of nuclear fuel slugs that have been used in a nuclear reactor, this separation being necessary to permit subsequent reprocessing of the fuel, and in particular extraction of plutonium therefrom.
- This invention is more especially concerned with methods and machines of this kind, in which the jacket is first out along two longitudinal lines (cutting operation), after which the fuel slug is pushed out from the jacket through a hole provided in a separator member and having a cross section practically identical to that of the slug, this last operation being hereinafter called extrusion.
- the object of the present invention is to improve such methods and machines so as to reduce the number of operations necessary for the above mentioned separation.
- the jacket cutting operation is performed after the jacketed slugs have been placed in position for the extrusion operation.
- FIG. 1 is a diagrammatic plan view of a machine made according to the invention
- FIG. 2 is a longitudinal elevational view of this machine
- FIGS. 3, 4 and 5 are sectional views on the lines IlIIIl, IV-IV and VV, respectively, of view 2;
- FIG. 6 is a partial plan view, with parts cut away, of the same machine.
- one of the two above mentioned positionings and the conveying from one place to another are dispensed with by effecting the jacket cutting operation after it has been positioned for the extrusion operation.
- jacket 1 which tightly surrounds slug 2, remains stationary during both of the cutting and extrusion operations.
- this jacket is held horizontally in a trough-shaped support 3 in line with the circular hole of a separator member 4, the edge of the jacket being in abutment contact with the edge of this hole.
- Cutting of the jacket along two longitudinal lines thereof is obtained by moving toward the left two cutting wheels 5 mounted on a carriage 6 movable in the longitudinal direction. Extrusion is obtained by means of a push-rod 7 in line with slug 2 and which causes said slug to slide through its jacket (kept stationary by separator member 4) and through the hole provided in said separator member 4.
- carriage 6 and rod 7 are controlled respectively by two coaxial pistons 8 and 9 slidable independently of each other so as to form the movable elements of a double hydraulic jack.
- the cylinder 10 of this jack is fixed with respect to separator member 4 by means of four horizontal rods 11 which constitute rails for rollers 12 mounted on carriage 6.
- the whole is immersed in water.
- Fluid under pressure is then fed through pipe 15 so as to enter the space between pistons 8 and 9.
- piston 8 moves toward the left, driving carriage 6 in this direction.
- the cutting wheels 5, carried by carriage 6 are dimensioned and positioned so that their respective cutting edges are of a distance from each other smaller than the external diameter of jacket 1 but just a little greater than the diameter of slug 2. These wheels, moving toward the left, first push the slug to bring its jacket into abutment against separator member 4 and then cut the wall of said jacket along two lonigtudinal lines diametrally opposed to each other.
- Power fluid under pressure is then fed through pipe 16 to push piston 9 toward the left together with rod 7 which thus pushes slug 2 through the hole of separator member 4, this hole having a diameter slightly greater than that of the slug.
- the two portions of the jacket separated by the cuts formed therein are moved away from each other.
- the extruded slug is evacuated through an inclined gutter 14 into any suitable receiver.
- Flu-id under pressure is then fed through pipe 17, which opens between pistons 8 and 9 in their present positions, so that piston 9 moves toward the right together with rod 7.
- the jacket is removed from support 3 through an ejector device. Fluid under pressure is then fed through pipe 18 to push piston 8 toward the right together with carriage 6. The parts of the machine have thus been brought back to their initial relative positions and a new operation can now be performed.
- FIGS. 2 to 6 further illustrate some of the details of the machine.
- Cutting wheels 5 are freely rotatable on vertical pins 19, pivoted about vertical axes 23 rigid with carriage 6 carried by levers 22, respectively.
- the distance between Patented Mar. 16, 1965 is these pins 19 may be adjusted by means of cams 29 (FIG. 6), springs 21 constantly tending to apply levers 22 against these cams.
- Arrow 43 (FIG. 6) shows the direction of movement of carriage 6 during the cutting operation.
- Fixed graduated sectors 44 (FIGS. 4 and 6) permit of easily determining the angular position of pointi as to compel the jackets to occupy a correct longitudinal position.
- this hopper In order to retract hopper 24 during the cutting operation, this hopper is pivotabie about a horizontal axis 26 (FIGS. 2 and 3) and said hopper is provided with two inclined surfaces 27 adapted to cooperate with roilers 28 mounted on carriage 6; thus, when the carriage is moving forward (that is to say toward separator member 4) hopper 24 is automatically retracted and when the carriage moves back in the opposed direction, the hopper returns to its initial position.
- a roller 29 (FEGS. 3 and 4) mounted under carriage 6 and urged in the downward direction by a spring 30 keeps the jackets applied against the bottom of support 3.
- a recess 35 of separator memher 4 constitutes a housing for this roller at the end of the movement of the carriage toward the left.
- the jacket ejector device essentially comprises two parallel plates 31 of suitable outline (FIG. 3) adapted to slide in transverse slots 32 formed in support 3. These plates are mounted on a base 33 the displacements of which (preferably controlled hydraulically) are guided by rod 34.
- a grid 46 (FIG. serves to protect the movable parts of the machine.
- the cylindrical slugs of natural uranium have a diameter of 26 mm. and a length of 300 approximately;
- the jackets made of an alloy of magnesium and zirconium, have a radial thickness of 1.5 mm. and are provided with longitudinal wings;
- the cutting wheels made of nickel-chromium hard steel
- the pressure of the oil fed to jack is kg./cm.
- the force exerted upon the slug ranges from 3 to 8 metric tons;
- The'speed of movement of the pistons is about 10 cm,/ second;
- the time between two successive operations is about one minute.
- An apparatus for separating a nuclear fuel slug from its rigid cylindrical jacket opened at both ends which comprises, in combination, a fixed separator member provided with a hole of a cross-section identical to that of said slug and to that of the inner wall of said jacket, means fixed with respect to said separator member for holding a slug opposite said hole and in line therewith with said jacket in abutment at one end thereof against the edge of said hole, a carriage movably connected with said separator member for sliding displacements of said carriage parallelly to the longitudinal dimenseion of said slug, cutting tools mounted on said carriage for cutting said jacket along two longitudinal lines thereof, reciprocating means for moving said carriage toward said separator member and away therefrom, and second reciprocating means movable toward and away from said separator member for pushing said slug through said hole during the displacements of said last mentioned reciprocating means toward said separator member.
- An apparatus for separating a nuclear fuel slug from its rigid cylindrical jacket opened at both ends which comprises, in combination, a fixed separator member provided with a hole of a cross-section identical to that of said slug and to that of the inner wall of said jacket, means fixed with respect to said separator member for holding a slug opposite said hole and in line therewith with said jacket in abutment at one end thereof against the edge of said hole, a carriage movably connected with said separator member for sliding displacements of said carriage parallellly to the longitudinal dimension of said slug, cutting tools mounted on said carriage for cutting said jacket along two longitudinal lines thereof, and a hydraulic jack having two pistons in line with each other and with said hole, said pistons being movable separately of each other, and rods connecting said two pistons respectively with carriage and with said slug pushing means.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Processing Of Solid Wastes (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR829816A FR1267862A (fr) | 1960-06-13 | 1960-06-13 | Machine à extruder les barreaux de matière irradiée contenus dans des gaines métalliques |
Publications (1)
Publication Number | Publication Date |
---|---|
US3173320A true US3173320A (en) | 1965-03-16 |
Family
ID=8733271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US146022A Expired - Lifetime US3173320A (en) | 1960-06-13 | 1961-06-13 | Machine for separating irradiated fuel slugs from their jackets |
Country Status (8)
Country | Link |
---|---|
US (1) | US3173320A (fr) |
BE (1) | BE604631A (fr) |
CH (1) | CH370492A (fr) |
DE (1) | DE1280427B (fr) |
FR (1) | FR1267862A (fr) |
GB (1) | GB934622A (fr) |
LU (1) | LU40234A1 (fr) |
NL (1) | NL265865A (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3563121A (en) * | 1968-12-09 | 1971-02-16 | Deering Milliken Res Corp | Cutting apparatus |
US3648554A (en) * | 1969-01-29 | 1972-03-14 | Walter Arnold | Apparatus for cutting spool wound thread into staple fibers |
US4295401A (en) * | 1976-07-29 | 1981-10-20 | Nus Corporation | Apparatus for disposing of radioactive fuel channels |
US5276965A (en) * | 1992-02-13 | 1994-01-11 | The Atlantic Group, Inc. | Method for dismantling potentially contaminated tubes from a tube bundle |
US20070092054A1 (en) * | 2005-10-26 | 2007-04-26 | Korea Atomic Energy Research Institute | Separation and receiving device for spent nuclear fuel rods |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2420577C2 (de) * | 1973-05-14 | 1982-12-02 | Westinghouse Electric Corp., 15222 Pittsburgh, Pa. | Verfahren und Vorrichtung zum Entfernen von Kernbrennstoff aus ummantelten Kernbrennelementen |
FR2472250A1 (fr) * | 1979-12-20 | 1981-06-26 | Nukem Gmbh | Procede et dispositif pour sortir des matieres combustibles nucleaires de leurs tubes de gainage |
GB2165688B (en) * | 1984-08-21 | 1988-06-22 | Atomic Energy Authority Uk | Dismantling irradiated nuclear fuel elements |
FR3001572B1 (fr) * | 2013-01-25 | 2015-02-27 | Technicatome | Reacteur nucleaire a eau pressurisee de type integre comportant un pressuriseur integre. |
CN109859869B (zh) * | 2019-03-11 | 2022-03-25 | 中国核动力研究设计院 | 一种适用于单根燃料元件瞬态试验的辐照装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US429292A (en) * | 1890-06-03 | Machine for stripping the lead covering from conductors | ||
US1366082A (en) * | 1918-12-24 | 1921-01-18 | Burgess Battery Co | Recovering components of exhausted dry-battery cells |
US2046341A (en) * | 1935-03-16 | 1936-07-07 | Okonite Callender Cable Co Inc | Method of and apparatus for removing sheaths from cables and the like |
US2099084A (en) * | 1933-10-19 | 1937-11-16 | Seckham Charles Percy | Apparatus for stripping electric cables |
US2209209A (en) * | 1938-12-12 | 1940-07-23 | Charles H Ruby | Method of dismantling containers |
US2827405A (en) * | 1956-05-09 | 1958-03-18 | Ca Atomic Energy Ltd | Method of desheathing of uranium fuel rods |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2880636A (en) * | 1947-03-04 | 1959-04-07 | Freedman Melvin | Cutting and wedging jacket remover |
-
0
- NL NL265865D patent/NL265865A/xx unknown
-
1960
- 1960-06-13 FR FR829816A patent/FR1267862A/fr not_active Expired
-
1961
- 1961-06-05 BE BE604631A patent/BE604631A/fr unknown
- 1961-06-06 CH CH657961A patent/CH370492A/fr unknown
- 1961-06-07 LU LU40234D patent/LU40234A1/xx unknown
- 1961-06-09 GB GB20890/61A patent/GB934622A/en not_active Expired
- 1961-06-12 DE DEC24349A patent/DE1280427B/de active Pending
- 1961-06-13 US US146022A patent/US3173320A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US429292A (en) * | 1890-06-03 | Machine for stripping the lead covering from conductors | ||
US1366082A (en) * | 1918-12-24 | 1921-01-18 | Burgess Battery Co | Recovering components of exhausted dry-battery cells |
US2099084A (en) * | 1933-10-19 | 1937-11-16 | Seckham Charles Percy | Apparatus for stripping electric cables |
US2046341A (en) * | 1935-03-16 | 1936-07-07 | Okonite Callender Cable Co Inc | Method of and apparatus for removing sheaths from cables and the like |
US2209209A (en) * | 1938-12-12 | 1940-07-23 | Charles H Ruby | Method of dismantling containers |
US2827405A (en) * | 1956-05-09 | 1958-03-18 | Ca Atomic Energy Ltd | Method of desheathing of uranium fuel rods |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3563121A (en) * | 1968-12-09 | 1971-02-16 | Deering Milliken Res Corp | Cutting apparatus |
US3648554A (en) * | 1969-01-29 | 1972-03-14 | Walter Arnold | Apparatus for cutting spool wound thread into staple fibers |
US4295401A (en) * | 1976-07-29 | 1981-10-20 | Nus Corporation | Apparatus for disposing of radioactive fuel channels |
US5276965A (en) * | 1992-02-13 | 1994-01-11 | The Atlantic Group, Inc. | Method for dismantling potentially contaminated tubes from a tube bundle |
US20070092054A1 (en) * | 2005-10-26 | 2007-04-26 | Korea Atomic Energy Research Institute | Separation and receiving device for spent nuclear fuel rods |
US7673544B2 (en) * | 2005-10-26 | 2010-03-09 | Korea Atomic Energy Research Institute | Separation and receiving device for spent nuclear fuel rods |
Also Published As
Publication number | Publication date |
---|---|
FR1267862A (fr) | 1961-07-28 |
DE1280427B (de) | 1968-10-17 |
BE604631A (fr) | 1961-10-02 |
GB934622A (en) | 1963-08-21 |
CH370492A (fr) | 1963-07-15 |
NL265865A (fr) | 1900-01-01 |
LU40234A1 (fr) | 1961-08-07 |
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